Washing machine and filter device for washing machine

Abstract

The invention provides a washing machine. In addition, the present invention provides a filter device provided in a drainage path of a washing machine. According to one embodiment, a filter device includes: a first chamber including a water inlet through which wash water is introduced; a second chamber having a water outlet for wash water; a filter accommodated in the second chamber; and an opening allowing the first chamber and the second chamber to communicate with each other, in which wash water introduced through the water inlet passes through the first chamber, the opening, and the filter in the order, and is discharged through the water outlet.

Description

Technical Field

[0001] The present disclosure relates to a washing machine and a filter device for the washing machine. Background Art

[0002] Water can be used to wash fabrics such as clothes. This washing is called water washing. During the water washing process, waste fibers and particles (for example, lint) may be generated. In particular, when washing clothes made of synthetic materials such as acrylic acid, nylon or polyester, microplastics or microfibers (hereinafter referred to as "microplastics") may be generated. The microplastics can be discharged through an outlet together with the water used for washing. The discharged microplastics may flow into rivers and oceans, which may have a negative impact on marine ecosystems.

[0003] Therefore, there is a growing need to significantly reduce or eliminate microplastics entering drainage and sewage systems. Recently, due to environmental regulations and / or increased awareness among users, there has been an increasing demand for microplastic filters that can be installed in laundry treatment appliances (e.g., washing machines).

[0004] Microplastics are generally defined as small plastic particles less than 5 mm in size. Due to their small size, microplastics are not easily filtered out using traditional filtration techniques. However, commercially available washing machines are typically only equipped with filters that remove relatively large foreign matter contained in the wash drain system and do not include microplastic filters.

[0005] In response to market demand, a microplastic filter suitable for a washing machine has been proposed. However, due to the random attachment of microplastics to the pores of the filter, the microplastic filter will suffer from a reduction in filtration efficiency, which requires frequent maintenance (e.g., cleaning). Prior art documents WO 2022-118034 A1 and WO 2021-032986 A1 disclose a filter unit that rotates a filter cage holding a porous rotating member to filter microplastics using centrifugal force. Although the filters in these prior art documents use centrifugal force to provide improved filtration efficiency, they require a drive unit (e.g., a motor) to rotate the filter cage and energy (e.g., electricity) to drive the motor. As a result, a complex sealing structure for the drive unit and the energy supply device is required, thereby increasing manufacturing costs.

[0006] (Patent Document 1) WO 2022-118034 A1

[0007] (Patent Document 2) WO 2021-032986 A1 Summary of the Invention

[0008] Technical issues

[0009] Accordingly, the present disclosure is directed to providing a filter device and a laundry treating apparatus that substantially obviate one or more of the problems described below.

[0010] An object of the present disclosure is to provide a plastic filter device capable of minimizing drainage resistance caused by the filter when the filter is used.

[0011] Another object of the present invention is to provide a plastic filter device having a structure that can be installed even in a limited space.

[0012] Another object of the present disclosure is to provide a plastic filter device that can be installed at a location easily accessible by a user and has a structure that facilitates filter replacement, thereby providing excellent maintainability.

[0013] Another object of the present invention is to provide a plastic filter device, wherein the filter has a relatively large area and water is evenly distributed and diffused on a front surface of the filter before drainage, thereby reducing drainage resistance.

[0014] Another object of the present disclosure is to provide a plastic filter device that can achieve a self-cleaning effect without requiring a separate power transmission device.

[0015] Another object of the present disclosure is to provide a plastic filter device capable of extending a cleaning cycle and / or a replacement cycle of a filter by achieving a self-cleaning effect.

[0016] Another object of the present disclosure is to provide a plastic filter device in the form of an external unit that can be installed in a laundry treating apparatus according to user's needs.

[0017] Another object of the present invention is to provide a plastic filter device capable of achieving a siphon breaking effect without requiring a separate siphon breakers provided in a laundry treating apparatus.

[0018] The objects that can be achieved by the embodiments are not limited to those specifically described above, and other objects not mentioned herein will become apparent to those skilled in the art through the following detailed description.

[0019] Technical Solution

[0020] The present disclosure provides a washing machine. Furthermore, the present disclosure provides a filter device disposed in a drainage channel of the washing machine. In one embodiment, the filter device may include: a first chamber including a water inlet through which wash water is introduced; a second chamber having a water outlet for the wash water; a filter housed in the second chamber; and an opening allowing the first chamber and the second chamber to communicate with each other through the opening. The wash water introduced through the water inlet may sequentially pass through the first chamber, the opening, and the filter, and be discharged through the water outlet.

[0021] In another aspect of the present disclosure, the filter device may include: a housing having a water inlet and a water outlet; a partition wall disposed inside the housing and dividing the interior of the housing into a first chamber and a second chamber; an opening provided in the partition wall and allowing the first chamber and the second chamber to communicate with each other through the opening; and a filter housed in the second chamber of the housing. The wash water introduced through the water inlet may sequentially pass through the first chamber, the opening, and the filter, and be discharged through the water outlet.

[0022] According to an embodiment of the present disclosure, water introduced into the filter device through the water inlet first fills the first chamber. The introduced water does not immediately flow into the second chamber, but fills the first chamber. The first chamber, which is separated from the second chamber, limits the immediate filling of the second chamber. This can prevent the filter housed in the second chamber from being completely submerged. If the filter is completely submerged, microplastics may randomly adhere to all parts of the filter, which increases drainage resistance. In contrast, the structure of the present embodiment can prevent the filter from being submerged and prevent microplastics from randomly adhering to all parts of the filter, thereby avoiding increasing drainage resistance.

[0023] In one embodiment, the filter device may further include a guide portion provided downstream of the opening to guide the wash water flowing into the second chamber from the opening to the side surface of the filter. The wash water discharged through the opening and guided to the side surface of the filter by the guide portion may separate particles adhering to the side surface of the filter and guide the separated particles to the bottom portion of the filter.

[0024] In one embodiment, the guide portion may include a guide surface extending downward from the opening and toward the side surface of the filter.

[0025] In one embodiment, the guide portion may be an inclined surface of an inner wall of the opening.

[0026] In one embodiment, the filter may include a left side surface, a right side surface, a front surface, a rear surface and a bottom surface, wherein the vertical lengths of the left side surface and the right side surface may be greater than the distance between the left side surface and the right side surface, so that particles separated from the left side surface and the right side surface can be accumulated from the lower parts of the left side surface and the right side surface to maintain the filtering performance of the left side surface and the right side surface of the filter.

[0027] In one embodiment, the filter may include the left surface, the right surface, the front surface, the rear surface, and the bottom surface, wherein a distance between the front surface and the rear surface may be greater than a distance between the left surface and the right surface.

[0028] In one embodiment, the filter is removable from the second chamber.

[0029] In one embodiment, the filter device may further include a drawer configured to accommodate the filter. The drawer may be withdrawn from the second chamber in a forward direction.

[0030] In one embodiment, the drawer may include a drain portion communicating with the water outlet.

[0031] In one embodiment, the filter is removable from the drawer through an open top of the drawer.

[0032] In one embodiment, left and right side surfaces of the drawer may be spaced apart from left and right side surfaces of the filter by a predetermined distance, wherein a bottom surface of the drawer may be spaced apart from a bottom surface of the filter by a predetermined distance.

[0033] In one embodiment, the drawer may include at least one of spacing protrusions provided on both side surfaces of the drawer or supports provided on a bottom surface of the drawer.

[0034] In one embodiment, a bottom surface of the drawer may be inclined downward toward the water outlet.

[0035] In one embodiment, the filter device may further include a coupling member detachably attached to an outer surface of one of the first chamber and the second chamber at a predetermined position.

[0036] In one embodiment, the filter device may further include a coupling member detachably attached to the outer surface of the housing at a predetermined position.

[0037] In one embodiment, the coupling member may include a magnetic member or a friction member.

[0038] In one embodiment, the water inlet and the water outlet may be positioned at a rear side of the washing machine equipped with the filter device.

[0039] Beneficial effects

[0040] According to an embodiment of the present disclosure, the filter device may minimize drainage resistance caused by the filter by preventing the filter from being immersed in water.

[0041] According to an embodiment of the present disclosure, the filter device may minimize drainage resistance caused by the filter by preventing the filter from being immersed in water.

[0042] According to an embodiment of the present disclosure, the filter device may be installed even in a narrow side space of the clothes treating apparatus.

[0043] According to an embodiment of the present disclosure, the filter device may be installed at a location easily accessible by a user, thereby facilitating replacement of the filter.

[0044] According to an embodiment of the present disclosure, the filter device can ensure a filter having a relatively large area and can reduce drainage resistance by uniformly distributing and spreading water on a front surface of the filter during drainage.

[0045] According to an embodiment of the present disclosure, the filter device can achieve a self-cleaning effect without requiring a separate power transmission device.

[0046] According to an embodiment of the present disclosure, the filter device can extend the cleaning cycle and / or replacement cycle of the filter by achieving a self-cleaning effect.

[0047] According to an embodiment of the present disclosure, the filter device may be provided in the form of an external unit, and thus may be installed in a clothes treating apparatus according to a user's needs.

[0048] According to an embodiment of the present disclosure, a filter device can control a siphon effect during drainage without a siphon interrupter. While Korean Utility Model Patent No. 20-0165755 discloses a duct control device (siphon interrupter) for controlling a siphon function in a drum washing machine, the filter device according to an embodiment of the present disclosure can function as a siphon interrupter, thereby controlling the siphon effect without the need for a separate siphon interrupter.

[0049] The effects of the present disclosure are not limited to the above-mentioned effects, and other unmentioned effects will be apparent to those skilled in the art from the present specification and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is an external perspective view of a clothes treating apparatus according to an embodiment of the present disclosure.

[0051] Figure 2 is a diagram illustrating a fluid flow in a clothes treating apparatus according to an embodiment of the present disclosure.

[0052] Figure 3 is a perspective view of a plastic filter device according to one embodiment of the present disclosure as seen from the front right side.

[0053] Figure 4 is a perspective view of a plastic filter device according to an embodiment of the present disclosure as seen from the left front side.

[0054] Figure 5 is an exploded perspective view of a plastic filter device according to an embodiment of the present disclosure.

[0055] Figure 6 is a cross-sectional perspective view of a plastic filter device according to an embodiment of the present disclosure.

[0056] Figure 7 The plastic filter device according to the embodiment of the present disclosure is along Figure 2 Schematic cross-sectional view taken along line II'.

[0057] Figure 8 The arrows indicate the passage Figure 7 Diagram of water movement in the baffles.

[0058] Figure 9 is a perspective view of a component according to a first embodiment of the present disclosure.

[0059] Figure 10 is a perspective view of a component according to a second embodiment of the present disclosure.

[0060] Figure 11 is a schematic diagram showing a water flow in the case where the second embodiment of the present disclosure is applied.

[0061] Figure 12 is a schematic diagram showing a water flow in the case where the third embodiment of the present disclosure is applied.

[0062] Figure 13 is a schematic diagram showing a water flow in the case where the fourth embodiment of the present disclosure is applied.

[0063] Figure 14The filter device to which the structure of the fifth embodiment is applied is schematically shown. Figure 2 A cross-sectional view taken along line II'.

[0064] Figure 15 is a perspective view of a component according to a fifth embodiment of the present disclosure.

[0065] Figure 16 is a schematic diagram showing a water flow in the case where the fifth embodiment of the present disclosure is applied.

[0066] Figure 17 The filter device to which the structure of the sixth embodiment is applied is schematically shown. Figure 2 A cross-sectional view taken along line II'.

[0067] Figure 18 is a perspective view of a component according to a sixth embodiment of the present disclosure.

[0068] Figure 19 is a schematic diagram showing a water flow in the case where the sixth embodiment of the present disclosure is applied.

[0069] Figure 20 It is a partially enlarged cross-sectional view of a plastic filter device according to a seventh embodiment of the present disclosure. DETAILED DESCRIPTION

[0070] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can further understand the present disclosure.

[0071] It will be apparent to those skilled in the art that the present disclosure can be implemented in a variety of different embodiments and is not limited to the embodiments described herein. In the accompanying drawings, parts not relevant to the description have been omitted for clarity of the present disclosure. Wherever possible, the same reference numerals will be used throughout the specification to refer to the same or similar parts.

[0072] In this specification, descriptions considered to be redundant are generally omitted.

[0073] <Definition of terms>

[0074] In the following description, the term "clothes treating apparatus" refers to any device including a function of washing clothes. For example, the clothes treating apparatus may be a washing machine.

[0075] As used in the following description, the term "treatment of clothing" refers to the treatment of clothing such as washing, disinfecting, bleaching, softening, and drying. The treatment of clothing can be achieved through cycles and processes performed by the clothing treatment device. One or more cycles are combined to form a process. One or more cycles are arranged in chronological order and can be combined to form a process. These cycles include a washing cycle, a rinsing cycle, a dehydration cycle, a cooling cycle, and a refresh cycle. The washing cycle is the process of separating foreign matter attached to clothing using water and detergent. The rinsing cycle is the process of separating clothing from foreign matter using water. The dehydration cycle is the process of removing water from clothing. The drying cycle is the process of removing moisture from clothing. The cooling cycle is the process of lowering the temperature of heated clothing. The refresh cycle is the process of deodorizing, removing wrinkles, and disinfecting clothing using one or more of air or steam.

[0076] As used in the following description, the terms "top side," "bottom side," "left side," "right side," "front side," and "rear side" should be understood with reference to the coordinate system in the referenced drawings. These terms are used for ease of description and are intended only to intuitively describe relative positional relationships. However, they are not intended to limit the present disclosure. For ease of description, reference will be made to a coordinate system in which the top side is represented by Z, the left side is represented by X, and the front side is represented by Y. In the illustrated embodiment, the front side of the washing machine is defined as the front, and the rear side of the washing machine is defined as the rear.

[0077] In this specification, when a component is referred to as being “connected” or “coupled” to another component, it should be understood that it may be “directly connected” or “directly coupled” to the other component, or other components may exist between these components. On the other hand, when a component is referred to as being “directly connected” or “directly coupled” to another component in this specification, it should be understood that there are no other components between these components.

[0078] The terms used in this specification are only used to describe specific embodiments and are not intended to limit the present disclosure. For example, to facilitate understanding of the embodiments, when a lower-level term (e.g., "spring") is used instead of a higher-level term (e.g., "elastic member"), this is merely for the purpose of describing the embodiments and does not limit the present disclosure to the lower-level concepts.

[0079] As used herein, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

[0080] As used herein, the terms “including” or “having” are intended to specify the presence of features, quantities, steps, operations, components, parts, or combinations thereof disclosed in the specification, and should not be understood as excluding the presence or addition of one or more other features, quantities, steps, operations, components, parts, or combinations thereof.

[0081] As used herein, the term "and / or" includes a combination of a plurality of listed items or any one of a plurality of listed items. For example, "a and / or b" means "a and b," "a," or "b." In addition, "a or b" may be interpreted to mean "a," "b," or "both a and b."

[0082] <Implementation Method>

[0083] Now refer to Figure 1 Describe the overall structure of the clothes processing equipment.

[0084] A washing machine will be described by way of example as an embodiment of the laundry treating apparatus 1 The outer appearance of the laundry treating apparatus 1 is defined by a cabinet 10 .

[0085] The cabinet 10 may include a front panel 11, a left panel (not shown), a right panel 12, a top panel 13, and a rear panel (not shown). An interior space is defined within the cabinet 10. Components constituting the laundry processing apparatus 1, such as the drum 20, may be disposed within the interior space of the cabinet 10.

[0086] A front panel 11 is arranged at the front side of the cabinet 10. A door 15 is mounted on the front panel 11.

[0087] A detergent opening may be formed in the front panel 11. The detergent storage unit 40 is inserted into the detergent opening. The detergent storage unit 40 may be placed in or taken out of the cabinet 10 by a user.

[0088] A filter opening may also be formed in the front panel 11. A drain filter 50 may be inserted into the filter opening. The drain filter 50 is configured to collect foreign matter from the wash water. The drain filter 50 may be arranged on one side of the lower portion of the front panel 11. The drain filter 50 may be connected to the drain flow channel 73 (see FIG. Figure 2 ), water is discharged from the tub 30 through the discharge flow channel. The drain filter 50 can filter out foreign matter from the wash water discharged from the tub 30 after the washing process. The user can put the drain filter 50 into or remove it from the cabinet 10 through the filter opening. When pulled out, the drain filter 50 can be cleaned and reused, or replaced. In an embodiment, the drain filter 50 can be used as a pre-treatment filter for the plastic filter unit 100 to be described later.

[0089] The following will now describe a plastic filter device 100 according to an embodiment of the present disclosure. The plastic filter device 100 can be attached to the exterior of the cabinet 10. The plastic filter device 100 can also be attached to a side panel. The plastic filter device 100 is attached to the upper portion of a surface forming the side panel. In some countries, the laundry treatment apparatus 1 is installed in environments where the drain pipe is positioned approximately 75 cm above the floor on which the laundry treatment apparatus is placed. Because the plastic filter device 100 utilizes the phenomenon of water falling, it is preferably installed at a location higher than the drain pipe. Figure 1 A plastic filter arrangement 100 is shown coupled to an upper portion of a surface forming the right panel 12 .

[0090] A plastic filter device 100 may be installed in the drain flow channel 75 .

[0091] In the following, reference will be made to Figure 2 The position of the plastic filter device 100 in the drainage flow path of the washing machine in this embodiment is described.

[0092] Water required for laundry treatment in the laundry treating apparatus 1 is supplied from a water source S. The water source S may be municipal water. In one embodiment, the supplied water may be delivered to the tub 30 via a supply flow path 71 .

[0093] The detergent storage unit 40 may be disposed in the supply flow path 71. The supplied water may flow into the detergent storage unit 40. The detergent or fabric softener stored in the detergent storage unit 40 may be transferred to the tub together with the supplied water.

[0094] The supply flow channel 71 may include a first supply pipe 71 a connecting the water source S and the detergent storage unit 40 , and a second supply pipe 71 b connecting the detergent storage unit 40 and the tub 30 .

[0095] The discharge flow channel 73 is connected to the lower portion of the tub 30. Water (e.g., wash water or rinse water) is discharged from the tub 30 to the outside of the tub through the discharge flow channel 73. In an embodiment, the drain filter 50 may be arranged in the discharge flow channel 73. The water discharged through the discharge flow channel 73 moves to the drain flow channel 75. The pump pressure that enables the water to flow along the drain flow channel 75 after being discharged from the discharge flow channel 73 may be provided by the drain pump 61.

[0096] In the embodiment, the drain flow path 73 connects the tub 30 and the drain pump 61. When the drain pump 61 operates, water introduced into the drain pump 61 is discharged to the drain flow path 75. The plastic filter unit 100 is arranged in the drain flow path 75. The water discharged from the tub 30 is filtered by the plastic filter unit 100 before being discharged.

[0097] The laundry processing apparatus shown also includes a water circulation structure. Therefore, the water discharged into the drain flow channel 73 can also flow into the circulation channel 74. The water discharged from the drain flow channel 73 can flow through the drainage flow channel 75 to be discharged (case 1), or flow through the circulation channel 74 to be resupplied to the tub 30 (case 2). When the drain pump 61 is operating and the circulation pump 62 is not operating, case 1 occurs. When the circulation pump 62 is operating and the drain pump 61 is not operating, case 2 occurs.

[0098] Plastic filter device 100 filters water introduced through first drain hose 75a and drains the filtered water through second drain hose 75b. During the cycle in which the water is drained through the drain hole, the water is filtered by plastic filter device 100. Plastic filter device 100 filters the water drained in Case 1 described above. In this embodiment, the same operations as in Case 1 occur during the rinse and spin cycles.

[0099] Figure 3 is a perspective view of a plastic filter device according to one embodiment of the present disclosure as seen from the left front side.

[0100] According to one embodiment, the plastic filter device 100 can be provided as an external unit. In an embodiment, the plastic filter device 100 is located outside the cabinet 10. The user can purchase the plastic filter device 100 separately and install it on the laundry treatment device 1. By installing the plastic filter device 100, the function of the laundry treatment device 1 can be upgraded.

[0101] In order to improve the ease of installation of the plastic filter device 100, the plastic filter device 100 may further include an attachment portion 150. The attachment portion 150 may be disposed on the housing 110. The attachment portion 150 according to one embodiment may include a magnetic member 151 and a friction member 152.

[0102] Magnetic members 151 may be magnets. Since cabinet 10 is typically made of metal, the magnetic force of magnetic members 151 can be used to attach plastic filter device 100 to a desired location on cabinet 10. The magnetic force provided by magnetic members 151 must be sufficient to at least withstand the weight of plastic filter device 100, which is filled with wash water to its maximum extent. The number and arrangement of magnetic members 151 can be designed to provide the necessary magnetic force.

[0103] The friction member 152 can provide friction to prevent the plastic filter device 100 from moving from its fixed position. According to embodiments, the friction member 152 can be made of a high-friction material such as rubber, silicone, or TPE. In the illustrated embodiment, the friction member 152 is arranged around the magnetic member 151. Even when the magnetic member 151 provides a strong magnetic force, it may not be able to resist slippage caused by vibration, etc. The friction member 152 can provide sufficient friction to prevent the position of the plastic filter device 100 from changing in response to such slippage.

[0104] In the following, reference will be made to Figure 4 The structure of the plastic filter device 100 will be described.

[0105] The plastic filter device 100 according to one embodiment may include a housing 110 and a drawer 120 .

[0106] A space is formed inside the housing 110. The housing 110 may include an inlet port 113 and an outlet port 114. The inlet port 113 is formed on the rear side of the housing 110 and may extend rearward. The inlet port 113 may be formed at the upper portion of the rear side of the housing 110. The inlet port 113 may be connected to the first drain hose 75a. The outlet port 114 is formed at the bottom side of the housing 110 and may extend downward. The outlet port 114 may be located at the rear portion of the bottom side of the housing 110. The outlet port 114 may be connected to the second drain hose 75b.

[0107] According to one embodiment, the housing 110 may further include a valve port 119. The valve port 119 may be formed below the inlet port 113. The valve port 119 is connected to the upper portion of the second chamber 112, which will be described later. A check valve 119a is installed in the valve port 119. The structure and function of the second chamber 112 and the check valve 119a will be described in detail later.

[0108] The housing 110 can accommodate a drawer 120. The drawer 120 can be pulled out of the housing 110 and pushed into the housing 110. A handle 121a can be formed on the front of the drawer 120. In the illustrated embodiment, the handle 121a is formed as an opening into which a user's fingers can be inserted. However, the handle 121a is not limited to the illustrated and described embodiment, as long as it functions as a handle.

[0109] In the following, reference will be made to Figure 5 and Figure 6 The structure of the plastic filter device 100 is described in detail.

[0110] The plastic filter device 100 according to one embodiment includes a housing 110, a drawer 120, and a filter 130. The filter 130 is accommodated in the drawer 120. The drawer 120 is accommodated in the housing 110. The drawer 120 can be moved forward to be removed from the housing 110. The filter 130 can be removed upward from the drawer 120.

[0111] The first space 110a of the housing 110 may include a first chamber 111 and a second chamber 112. The first chamber 111 communicates with the second chamber 112. Furthermore, the first chamber 111 communicates with an inlet port 113, and the second chamber 112 communicates with an outlet port 114.

[0112] The drawer 120 is detachably received in the second chamber 112. The filter 130 is detachably received in the drawer 120. Thus, the filter is received in the second chamber 112 (see FIG. Figure 6 ).

[0113] The water introduced into the inlet port 113 flows through the first chamber 111, the filter 130, the second chamber 112, and the outlet port 114 in sequence. Microplastics contained in the water are filtered out by the filter 130. In addition, the water flowing from the first chamber 111 into the filter 130 hits the wall surface of the filter 130, thereby causing the microplastics attached to the wall surface to fall off. That is, in this embodiment, the microplastics attached to the wall surface of the filter 130 can be removed without a separate driving source (self-cleaning).

[0114] In an embodiment, the inner space of the housing may further include a third chamber 110b. The third chamber 110b may store a tool (not shown, for example, a cleaning brush) for cleaning the filter 130.

[0115] The structure of the drawer 120 will be described below.

[0116] The drawer 120 may include a front portion 121, a first side portion 122, a second side portion 123, and a bottom portion 124. The drawer 120 is configured to at least allow water that has passed through the filter 130 to flow out. In order to drain the water that has passed through the filter 130, the drawer 120 may not include a rear portion. Alternatively, a drawer outlet 124a may be formed in the bottom portion 124 of the drawer 120. In the illustrated embodiment, the drawer 120 is not provided with a rear portion and further includes a drawer outlet 124a formed in the bottom portion 124. The structure of the drawer 120 may be combined with the internal structure of the housing 110 to form an effective drainage structure through the drawer outlet 124a. The filter 130 may be accommodated in an interior space 127 defined by the front portion 121, the first side portion 122, the second side portion 123, and the bottom portion 124 of the drawer 120.

[0117] A seating portion 128 on which the filter 130 is mounted may be formed on the first and second side portions 122 and 123. In an embodiment, the seating portion 128 is provided on top surfaces of the first and second side portions 122 and 123 and may be recessed downward therefrom.

[0118] The filter 130 according to one embodiment includes a filter member 131. The filter member 131 filters microplastics separated from the clothes. When water passes through the filter member 131, particles contained in the water are filtered out.

[0119] In an embodiment, the filter member 131 is provided with pores small enough to filter out microplastics. According to the definition, microplastics refer to particles smaller than 5 mm. Therefore, the filter member 131 can be provided with pores capable of filtering out particles smaller than 5 mm. The filter member 131 can be formed from various materials such as steel, fiber (e.g., nylon), or resin.

[0120] The filter 130 may further include a frame 132. The frame 132 holds the filter member 131 in a desired shape. The frame 132 is arranged so as to hold the filter member 131 in a "U" shape when viewed from the front. The shape of the frame 132 is not limited to the shape shown, and may be formed into a lattice structure, for example.

[0121] A seating portion 132a may be formed on the frame 132. The seating portion 132a is formed to protrude outward from the upper end of the filter 130. It protrudes far enough to rest on the seating portion 128 of the drawer 120. When the seating portion 132a of the filter 130 rests on the seating portion 128 of the drawer 120, the placement position of the filter 130 in the drawer 120 can be restricted to a specified position.

[0122] An overflow opening 134 may be formed in the filter 130. When particles filtered out by the filter 130 accumulate to clog the filter 130 and prevent water from flowing to the outside, the overflow opening 134 allows water to be discharged. When the water flow is blocked, it may have a negative impact on components such as the drain pump 61. In this case, forcibly discharging the water is advantageous. Therefore, the overflow opening 134 is formed in the filter 130 to allow water to overflow when the capacity of the filter is exceeded. The overflow opening 134 may be formed in the upper portion of the filter 130. In the illustrated embodiment, the overflow opening 134 is configured as a groove that is recessed downward from the top of the frame 132 to a certain depth.

[0123] The interior of the filter 130 may be defined as a filter chamber 135. The filter chamber 135 may be defined by the filter member 131 and the frame 132. The top of the filter chamber 135 is open. The left, right, and bottom portions of the filter member 131 and the front portion of the frame 132 may define the filter chamber 135. Based on the filter chamber 135, an overflow opening 134 is formed in an upper portion of the filter chamber 135.

[0124] In an embodiment, when viewed from the front, the filter 130 has a horizontal (left-to-right) length that is shorter than its vertical (top-to-bottom) length. According to embodiments of the present disclosure, the width of the housing 110 can be reduced by using a filter 130 with a short horizontal length, allowing it to be installed even in confined spaces. In an embodiment, when viewed from the side, the filter 130 has a front-to-back length that is longer than its vertical length. According to embodiments of the present disclosure, despite the limitations of a narrow width and a required installation position above the drain pipe, a longer front-to-back filter 130 can be used to fit in a confined space while ensuring a sufficiently large area for the filter member 131. Generally speaking, filters used in washing machine drainage systems are typically cylindrical. Narrowing the width of the filter reduces the filter's internal space, thereby increasing drainage resistance. Therefore, filters are typically not made narrower, but rather cylindrical. Additionally, to balance the drainage pressure of water introduced into the filter, standard practice is to use a cylindrical filter. This allows water to be introduced into the top center of the cylindrical filter and drained through the bottom center.

[0125] In the present disclosure, the left-right length of filter 130 is shortened to allow the plastic filter device to be installed in a narrow space. Furthermore, to ensure sufficient filtering area, the front-to-back length of filter 130 is increased. According to embodiments of the present disclosure, regardless of the shape of filter 130, the drainage resistance caused by filter 130, which increases as filter 130 is used, can be minimized. Details of the embodiments and technical principles for minimizing drainage resistance can be found in the description of first chamber 111 and second chamber 112.

[0126] Additionally, the vertical length of the filter 130 can be made greater than the distance between the left and right sides of the filter. In an embodiment providing a self-cleaning function, the filter 130 expel particles adhering to its left and right sides. The expelled particles accumulate at the lower portions of the left and right sides of the filter 130, thereby maintaining the filtering performance of the side surfaces of the filter 130.

[0127] In the following, reference is made to Figure 6 A more detailed description of the plastic filter device 100 is provided.

[0128] The plastic filter device 100 according to one embodiment includes a first chamber 111 , a second chamber 112 , a filter 130 , and a partition wall 400 .

[0129] As described above, the plastic filter device 100 according to one embodiment may include the housing 110 , the drawer 120 detachably disposed in the housing 110 , and the filter 130 detachably disposed in the drawer 120 .

[0130] The housing 110 defines a predetermined space and includes a first chamber 111 and a second chamber 112 that communicate with each other. The first chamber 111 communicates with an inlet port 113 , and the second chamber 112 communicates with an outlet port 114 .

[0131] The drawer 120 is detachably received in the second chamber 112. The filter 130 is detachably received in the drawer 120. Therefore, the filter 130 is received in the second chamber 112.

[0132] Therefore, the water (wash water) introduced through the inlet port 113 flows through the first chamber 111, the filter 130, the second chamber 112 and the outlet port 114 in sequence. Microplastics contained in the water are filtered out by the filter 130. In addition, the water flowing from the first chamber 111 into the filter 130 hits the wall surface of the filter 130, thereby causing the microplastics collected on the wall surface to fall off. That is, in this embodiment, the microplastics attached to the wall surface of the filter 130 can be removed without a separate driving source (self-cleaning).

[0133] A partition wall 400 is provided in the housing 110. The first space 110a of the housing 110 is divided into an upper space and a lower space by the partition wall 400. The upper space is the first chamber 111, and the lower space is the second chamber 112. The partition wall 400 has an opening 410a that allows the first chamber 111 and the second chamber 112 to communicate with each other.

[0134] The drawer 120 is arranged in the second chamber 112. The filter 130 is arranged in the drawer 120. Therefore, the filter 130 is arranged in the second chamber 112.

[0135] An additional partition wall 112b (bottom surface 112b) may be provided at the bottom of the second chamber 112. The space between the additional partition wall 112b and the lower inner wall of the housing 110 is the third chamber 110b. Cleaning tools may be stored in the third chamber 110b. For simplicity, in this embodiment, the additional partition wall 112b is present.

[0136] Hereinafter, each component will be described in detail.

[0137] The first chamber 111 is the space that initially holds the water introduced into the plastic filter device 100. The first chamber 111 is long in the front-to-back direction. It is narrow in the left-to-right direction. The specific dimensions of the length and width of the first chamber 111 are design considerations. However, one of the technical challenges recognized by those skilled in the art is achieving a structure that can fit in a narrow space. Therefore, in the context of achieving this design goal, the terms "long" and "narrow" should be properly understood. At least the front-to-back length should be greater than the left-to-right width. The narrow left-to-right width means it is narrower than a typical cylindrical structure. This narrow width is offset by the long front-to-back length, ensuring sufficient filtration area. As a result, the plastic filter device 100 can be installed even in the narrow space next to the laundry treatment appliance 1. Furthermore, even in spaces with ample width, it achieves a superior aesthetic appearance.

[0138] The first chamber 111 includes a water inlet 111a. The water inlet 111a may be formed at the rear of the first chamber 111. The term "rear" is not limited to the rear surface. The water inlet 111a may also be formed at the rear of the top surface of the first chamber 111. The water inlet 111a is connected to the inlet port 113. The inlet port 113 may extend from the water inlet 111a of the housing 110.

[0139] The water inlet 111a introduces water into the bottom surface defining the first chamber 111. In an embodiment, the bottom surface defining the first chamber 111 is the top surface 410 of the partition wall 400. The water entering through the water inlet 111a is temporarily contained in the first chamber 111. The temporarily contained water then falls into the second chamber 112 through the opening 410a. As the water falls, it sweeps downward across the wall surface of the filter 130, causing the microplastics attached to the wall surface of the filter 130 to separate from the wall surface of the filter 130. That is, in an embodiment, the microplastics attached to the wall surface of the filter 130 are separated from the wall surface of the filter 130 without the need for a separate driving source. Therefore, self-cleaning can be performed.

[0140] The filter 13 is housed in the second chamber 112. In an embodiment, the drawer 120 is housed in the second chamber 112, and the filter 130 is housed in the drawer 120. When the filter 130 is removed from the second chamber 112, any residual water remaining in the filter 130 may flow out and potentially contaminate the exterior of the device. By employing the illustrated type of drawer 120, when the user removes the drawer 120, the bottom surface of the drawer 120 can prevent the residual water in the filter 130 from flowing downward. Thus, user convenience is improved.

[0141] The second chamber 112 has a longer length in the front-to-back direction. The second chamber 112 has a narrower width in the left-to-right direction. The specific dimensions of the length and width of the second chamber 112 are design considerations. However, one of the technical challenges recognized by those skilled in the art is to achieve a structure that can be installed in a narrow space. Therefore, in the context of achieving this design goal, expressions such as "long" and "narrow" should be properly understood. At least the length in the front-to-back direction is greater than the width in the left-to-right direction. Taking into account the interaction between the second chamber and the filter, the length and width of the second chamber 112 and the filter 130 can be appropriately designed within the scope of the technical object.

[0142] In an embodiment, the vertical length of the second chamber 112 is greater than the vertical length of the first chamber 111. The front-to-back length of the second chamber 112 may be equal to the front-to-back length of the first chamber 111. In addition, the width of the second chamber 112 may be equal to the width of the first chamber 111. The volume of the second chamber 112 may be greater than the volume of the first chamber 111.

[0143] Since the second chamber 112 is where the actual filtration is performed, it is advantageous to ensure that the volume of the second chamber 112 is sufficient to maximize the area of the filter 130. Before water enters the second chamber 112, the first chamber 111 acts as a buffer. Water introduced through the water inlet 111a does not flow into the second chamber 112 immediately, but is temporarily stored in the first chamber 111. The separation between the first chamber 111 and the second chamber 112 prevents water from immediately filling the second chamber 112. Therefore, the filter 130 housed in the second chamber 112 is prevented from becoming completely submerged. If the filter becomes completely submerged, microplastics may randomly adhere to various parts of the filter, increasing the drainage resistance. The structure of this embodiment can prevent the complete submergence of the filter 130 and prevent microplastics from randomly adhering to the filter 130. Therefore, the increase in drainage resistance can be prevented.

[0144] The second chamber 112 includes a water outlet 112a. The water outlet 112a may be formed on the lower side of the second chamber 112. The term "lower side" is not limited to the bottom surface. The water outlet 112a may be formed at the lower portion of the rear surface of the second chamber 112. In an embodiment, the water outlet 112a may be located at the rear, just like the water inlet 111a. In other words, the water outlet 112a may be formed at the lower rear side of the plastic filter device 100. Typically, the drainage channel 75 of the laundry treatment apparatus 1 is located at the rear. Therefore, by locating both the water inlet 111a and the water outlet 112a at the rear of the plastic filter device 100, the drainage channel 75 can be prevented from extending. The length of the drainage channel 75 is related to drainage resistance. Increasing the length of the drainage channel 75 is detrimental to drainage and requires higher pumping pressure from the drain pump 61. In accordance with an embodiment, the plastic filter device 100 may be positioned closer to the front of the laundry treatment apparatus 1 to improve usability while reducing the length of the drainage channel 75.

[0145] The bottom surface 112b defining the second chamber 112 slopes downwardly toward the water outlet 112a. In the absence of the third chamber 110b, the lower inner surface of the housing 110 may also slope downwardly toward the water outlet 112a. In the illustrated embodiment, the primary structure directing water toward the water outlet 112a is the bottom portion 124 of the drawer 120. Therefore, in this embodiment, the bottom portion 124 of the drawer 120 slopes downwardly toward the water outlet 112a.

[0146] The water outlet 112a is in communication with the outlet port 114. The outlet port 114 extends from the water outlet 112a of the housing 110. Water passing through the filter chamber 135 exits through the water outlet 112a.

[0147] The filter 130 is housed in the second chamber 112. The bottom surface of the filter 130 is spaced apart from the bottom surface defining the second chamber 112. In this embodiment, the second chamber 112 is substantially defined by the drawer 120. Therefore, the bottom surface of the filter 130 is spaced apart from the bottom portion 124 of the drawer 120. The side surfaces of the filter 130 are also spaced apart from the side surfaces defining the second chamber 112. In this embodiment, the second chamber 112 is substantially defined by the drawer 120. Therefore, the side surfaces of the filter 130 are spaced apart from the first side portion 122 and the second side portion 123 of the drawer 120.

[0148] A support member 112 c protruding upward may be provided on a lower inner surface of the second chamber 112 . The support member 112 c may support the drawer 120 .

[0149] In an embodiment, the partition wall 400 partitions the first space 110a of the housing 110 into the first chamber 111 and the second chamber 112. That is, the first chamber 111 and the second chamber 112 may be defined by the housing 110 and the partition wall 400.

[0150] In an embodiment, the partition wall 400 and the housing 110 are configured to be separable from each other. For example, the partition wall 400 can be separated from the housing 110. When the partition wall 400 is configured to be separable from the housing 110 as a separate component, assemblability and productivity can be improved. However, the present disclosure does not exclude a configuration in which the partition wall 400 and the housing 110 are formed integrally.

[0151] A valve port 119 is provided in the upper portion of the second chamber 112. A check valve 119a is disposed in the valve port 119. The check valve 119a prevents water in the second chamber 112 from leaking out. The check valve 119a allows outside air to enter the interior. In an embodiment, when the drain pump 61, which is operating during a cycle of the laundry treatment apparatus 1, stops, water remaining in the first drain hose 75a flows back into the laundry treatment apparatus 1. In this case, the interior of the plastic filter device 100 becomes slightly negatively pressurized. Under such negative pressure, drainage through the second drain hose 75b may not proceed smoothly. The check valve 119a equalizes the pressure inside and outside the plastic filter device 100, ensuring smooth drainage. The check valve 119a is configured to open even under slight negative pressure, allowing outside air to enter the interior of the plastic filter device 100 while preventing water from escaping. When the drain pump 61 stops and the interior of the plastic filter device 100 becomes slightly negatively pressurized, the check valve 119a opens, thereby achieving a siphon-breaking effect. The siphon-breaking effect can help prevent continued discharge of wash water.

[0152] According to an embodiment of the present disclosure, the siphon effect during drainage can be controlled without the need for an additional siphon interrupter. Korean Utility Model Patent No. 20-0165755 discloses a conduit control device (siphon interrupter) for controlling the siphon function of a drum washing machine. According to an embodiment of the present disclosure, the plastic filter device 100 functions as a siphon interrupter, allowing the siphon effect to be controlled without the need for a separate siphon interrupter.

[0153] The drawer 120 is detachably accommodated in the housing 110. Therefore, a waterproof seal is required between the housing 110 and the drawer 120. The structure of the waterproof seal will be described below.

[0154] In an embodiment, portion 129b of the component protruding from the front 121 of the drawer 120 is inserted into the first chamber 111. Portions 129a and 129c of the component protruding rearward from the front 121 of the drawer 120 are inserted into the second chamber 112.

[0155] The drawer 120 may include a first sealing member 161 that contacts an inner surface of the front portion of the housing 110 defining the first space 110a to seal the open front portion of the housing 110. The drawer 120 includes a first sealing seat 129a that protrudes rearward from the front portion 121 and has a shape corresponding to the first space 110a. The first sealing member 161 may be assembled into the first sealing seat 129a.

[0156] The drawer 120 may further include a second sealing member 162 that contacts a wall surface defining the front of the first chamber 111 to seal the front opening of the first chamber 111. The second sealing member 162 may be assembled into a second sealing seat 129b. The second sealing seat 129b protrudes rearward from the front 121 of the drawer 120 and may have a shape corresponding to the first chamber 111. In the illustrated embodiment, the second sealing seat 129b protrudes from the first sealing seat 129a.

[0157] The drawer 120 may further include a third sealing member 163 for watertightness at the portion contacting the filter 130. The portion of the drawer 120 contacting the filter 130 forms a space defining the filter chamber 135 and can therefore be configured to be watertight. The third sealing member 163 may be assembled into the third sealing seat 129c. In the illustrated embodiment, the third sealing seat 129c extends downward from the second sealing seat 129b.

[0158] Refer to the following Figure 7 The positional relationship between the drawer 120 and the filter 130 inside the housing 110 is described.

[0159] Filter 130 is placed on seating portion 128 of drawer 120. When placed on seating portion 128, filter 130 can be supported by drawer 120. Sealing portion 128 can be formed as a step. The upper end of frame 132 of filter 130 can be placed on seating portion 128. The upper end of frame 132 has a seating portion 132a protruding outward.

[0160] The drawer 120 may be supported by a guide protrusion 115 protruding from an inner wall of the housing 110. During insertion or removal of the drawer 120, the drawer may be guided along the guide protrusion 115. The guide protrusion 115 may extend in a front-rear direction.

[0161] The side surface of the filter 130 and the inner surface of the drawer 120 may be spaced apart from each other. To help maintain the spacing between the filter member 131 defining the side surface of the filter 130 and the inner surface of the drawer 120, inwardly protruding spacing protrusions 122a and 123b may be formed on the inner surface of the drawer 120. A plurality of spacing protrusions 122a and 123b may be formed. The spacing protrusions 122a and 123b may extend in the front-to-back direction. In an embodiment, the spacing protrusions 122a and 123b may extend continuously in the front-to-back direction. Water may flow downward through the gaps where the spacing protrusions 122a and 123b are discontinuous.

[0162] The partition wall 400 may include a guide portion 420. The guide portion 420 guides water passing through the opening 410a toward the inner surface of the filter 130. The guide portion 420 may include a guide surface 420a.

[0163] In one embodiment, a guide portion 420 may be provided at the bottom surface of the partition wall 400. The guide portion 420 may protrude downward from the bottom surface of the partition wall 400. The guide portion 420 may include a first extension portion extending downward from the bottom surface of the partition wall 400. The guide portion 420 may include a second extension portion and a third extension portion, the second extension portion and the third extension portion extending leftward and rightward at a predetermined angle from the lower end of the first extension portion. The top surfaces of the second extension portion and the third extension portion may form a guide surface 420a.

[0164] In an embodiment, guide surface 420a is inclined toward the side surface of filter 130. In the illustrated embodiment, one guide surface 420a is inclined toward the left side surface of filter 130, and the other guide surface 420a is inclined toward the right side surface of filter 130. Guide surface 420a is inclined downward. In particular, guide surface 420a is inclined toward the upper portion of the side surface of filter 130. Water guided by guide surface 420a sweeps downwardly along the side surface of filter 130. When water guided by guide surface 420a reaches the upper portion of the side surface of filter 130, it can sweep foreign matter downward from the upper portion of the side surface of filter 130, thereby achieving a self-cleaning function.

[0165] In the following, reference is made to Figure 7 and Figure 8 Self-cleaning according to the present disclosure is described.

[0166] The water guided by guide surface 420a strikes the upper portion of the side surface of filter 130. In an embodiment, the water guided by guide surface 420a strikes filter member 131, which defines the side surface of filter 130. As the water strikes the side surface of filter 130 and flows downward, particles attached to filter member 131 may be separated from filter member 131. This operation can be described as cleaning the side surface of filter member 131. Particles attached to filter 130 can then be collected at the bottom of filter 130. In other words, particles filtered from the water can be collected upward from the bottom of filter 130. This prevents particles from randomly attaching to the surface of filter 130. It also prevents the pores of filter member 131 from being clogged by particles, so that even if filter 130 still has effective filtering capacity, it is necessary to clean filter 130 for it to function properly. In other words, the cleaning cycle of filter 130 can be extended.

[0167] In the illustrated embodiment, the guide surface 420a is formed on the guide portion 420 protruding downward from the partition wall 400 and constituting the partition wall 400, and is positioned below the opening 410a. However, the guide surface 420a only needs to perform the function of guiding water to the side surface of the filter 130.

[0168] Hereinafter, various embodiments of the above-mentioned partition wall 400 and guide portion 420 will be described.

[0169] <First embodiment>

[0170] Figure 9 is a perspective view of a partition wall 1400 according to the first embodiment of the present disclosure.

[0171] Partition wall 1400 has an opening 1410a formed therein. A guide portion 1420 is positioned below opening 1410a. A guide surface 1420a is formed on guide portion 1420. When viewed from the front, guide portion 1420 has an inverted "Y" shape. Opening 1410a is formed as a long slit in the front-to-back direction. Opening 1410a includes a pair of openings 1410aa formed to discharge water to the right and an opening 1410ab formed to discharge water to the left. Multiple openings 1410a are arranged along the front-to-back direction.

[0172] The front-to-rear length of the opening may be substantially equal to the front-to-rear length of the guide portion.

[0173] <Second embodiment>

[0174] Figure 10 is a perspective view of a partition wall according to a second embodiment of the present disclosure.

[0175] The openings 1410a include a pair of openings 1410aa formed to discharge water to the right and an opening 1410ab formed to discharge water to the left. The plurality of openings 1410a are arranged along the front-rear direction.

[0176] The guide surface 2420a may be a curved surface. The guide surface 2420a may have a decreasing slope as it extends downward.

[0177] The difference between the first embodiment and the second embodiment is the shape and number of the openings, the length of the guide portion, and the shape of the guide portion. In the second embodiment, the partition wall 2400 may include a plurality of small openings 2410a. The guide portion 2420 may include a pair of guide portions extending in the front-to-rear direction.

[0178] In the following description, differences from the first embodiment will be mainly discussed.

[0179] The opening 2410a is formed in a rectangular shape. In an embodiment, the size and number of the opening 2410a can be used to design the water pressure. That is, the water pressure can be appropriately designed by adjusting the ratio between the total cross-sectional area of the opening 2410a and the cross-sectional area of the water inlet 111a.

[0180] Reference Figure 11 The water flow in the second embodiment is described. In the embodiment, water flows into the first chamber 111 through the water inlet 111a. The water flows in the direction from the back (-Y) to the front (+Y). Specifically, since the water is discharged by the drainage pump 61 (see Figure 2 ) flows into the water inlet 111a, so the water introduced through the water inlet 111a has a predetermined pressure. The water falling through the opening flows in an inclined direction, that is, toward the +Y direction. As a result, the water surface has a predetermined inclination angle (∠a1) instead of being horizontal, and the water level is higher at the front. Figure 11 In the embodiment described in the embodiment, the drainage pressure at the rear portion where the water level is low is relatively lower than the drainage pressure when the water level is constant. In the structure where the water outlet 112a is located at the rear portion, as shown in FIG. Figure 11 As shown in , the drainage pressure at the rear is weak, which may reduce the drainage efficiency. Figure 12 The embodiments shown and described hereinafter relate to various structures designed to maintain a constant water level.

[0181] <Third embodiment>

[0182] In the following, reference will be made to Figure 12 A third embodiment is described.

[0183] As described above, in the second embodiment, the drainage pressure at the rear portion where the water outlet 112a is located is weak, which may reduce drainage efficiency. Therefore, it is desirable to increase the drainage pressure at the location of the water outlet 112a. In the third embodiment, the drainage pressure at the location of the water outlet 112a can be increased.

[0184] The difference between the third embodiment and the second embodiment lies in the size of the opening.

[0185] In the third embodiment, the sizes of the respective openings 3410a are different. The cross-sectional area of each opening 3410a decreases from the rear (-Y) to the front (+Y). For simplicity, the figure assumes that the openings 3410a are square. The cross-sectional area of the opening 3410a located at the most upstream (along the -Y direction) is "d1×d1", and the cross-sectional area of the opening 3410a located at the most downstream (along the +Y direction) is "d2×d2". Then, "d1×d1">"d2×d2".

[0186] As the size of opening 3410a decreases, the amount of water falling decreases. Furthermore, as the size of opening 3410a decreases, the +Y component of the vector representing the angle of water discharged from opening 3410a decreases. In other words, the angle at which water drains from smaller openings 3410a becomes closer to a right angle.

[0187] Compared to the second embodiment, the slope of the water surface (∠а3) in the third embodiment is more gradual. Consequently, the drainage pressure at the rear is higher than in the second embodiment, resulting in faster drainage. Consequently, when compared over the same time period, the average water level in this embodiment is lower than that in the second embodiment. This reduces the area of the left and right sides of the filter submerged in water, thereby improving filtration efficiency.

[0188] <Fourth embodiment>

[0189] In the following, reference will be made to Figure 13 A fourth embodiment will be described.

[0190] In the fourth embodiment, the drainage pressure in the area where the water outlet 112a is located can be increased. The difference between the fourth embodiment and the second embodiment lies in the height (depth) of the opening.

[0191] The opening in the fourth embodiment and the opening in the second embodiment have the same size and different heights (h1, h2). When the height of the opening 2410a in the second embodiment is h1 and the height of the opening 4410a in the fourth embodiment is h2, h2>h1.

[0192] As the height of opening 4410a increases, the +Y component of the vector of the angle of water discharged from opening 4410a decreases. In other words, as the height of opening 4410a increases, the drainage angle approaches a right angle. By adjusting this drainage angle based on the height of opening 4410a, it is possible to prevent the water flow from being directed forward.

[0193] In the second embodiment, the falling water is more affected by the straightness of the water flow in the forward direction than in the fourth embodiment, which causes the water to deflect in the +Y direction. However, in the fourth embodiment, by increasing the height of the opening 4410a, the straightness of the water flow in the forward direction can be reduced.

[0194] Compared to the second embodiment, the straightness of the falling water in the forward direction (+Y) is reduced (the figure shows an extreme case where it is almost non-existent). As a result, the water is prevented from being deflected forward compared to the second embodiment. This results in a flatter slope (∠а4) on the water surface. Furthermore, in a configuration where the water outlet 112a is located at the rear, the drainage pressure at the rear is higher than that in the second embodiment. When compared over the same time period, the average water level (water level) is lower than that in the second embodiment.

[0195] Next, an embodiment will be described in which the drainage pressure at the location of the water outlet 112 a can be increased by changing the structure of the first chamber.

[0196] <Fifth embodiment>

[0197] In the following, reference will be made to Figure 12 A fifth embodiment of a plastic filter device 100 is described.

[0198] The plastic filter device 100, in particular, the first chamber 111 includes a first flow channel 5410a and a second flow channel 5420a. The first flow channel 5410a and the second flow channel 5420a are elements for guiding the flow of water.

[0199] One side of the first flow channel 5410a is connected to the water inlet 111a (see Figure 6 ) is connected, and its opposite side is connected to the second flow channel 5420a. One side of the second flow channel 5420a is connected to the first flow channel 5410a. The second flow channel 5420a is connected to the opening 5420b. In an embodiment, the opening 5420b is formed on the bottom surface defining the second flow channel.

[0200] is introduced into the water inlet 111a (see Figure 6) initially flows into the first flow channel 5410a. The water entering the first flow channel 5410a flows forward and enters the second flow channel 5420a at the end of the first flow channel. The water entering the second flow channel 5420a is discharged into the filter chamber 135 of the filter 130 through the opening 5420b.

[0201] In the following, reference will be made to Figure 14 and Figure 15 The partition wall 5420 and the partition section 5410 defining the first flow channel 5410 a and the second flow channel 5420 a in the fifth embodiment are described.

[0202] The first flow channel 5410a and the second flow channel 5420a are formed by dividing the first chamber 111. In an embodiment, the first flow channel 5410a and the second flow channel 5420a communicate with each other.

[0203] In an embodiment, the first flow channel 5410a and the second flow channel 5420a may be formed by a combination of a partition wall 5420 and a partition section 5410. The combined configuration of the partition wall 5420 and the partition section 5410 is referred to as a flow channel forming portion 5400.

[0204] In this embodiment, the flow channel forming portion 5400 divides the first space 110 a of the housing 110 into a first chamber 111 and a second chamber 112 .

[0205] The partition section 5410 partitions the space of the first chamber 111 into a first flow channel 5410a and a second flow channel 5420a. Therefore, the interior of the partition section 5410 may be the first flow channel 5410a, and the space between the partition section 5410 and the inner wall of the first chamber 111 may be the second flow channel 5420a.

[0206] In the embodiment shown, the partition section 5410 may be configured as a hollow cylindrical tube. The rear end of the tube is in communication with the water inlet 111a (see Figure 16 ), and can communicate with the second flow channel 5420a. The internal space of the partition section 5410 is defined as the first flow channel 5410a. The remaining space in the first chamber 111 except the space defined as the first flow channel 5410a is defined as the second flow channel 5420a.

[0207] The partition section 5410 may further include a sealing portion 1510e that enhances the close contact between the water inlet 111a and the partition section 5410, ensuring that water entering through the water inlet 111a flows only into the first flow channel 5410a defined by the partition section 5410, thereby improving water tightness.

[0208] Reference Figure 16, describes the flow of water in the fifth embodiment of the present disclosure.

[0209] The water entering through the water inlet 111a flows into the first flow channel 5410a defined in the partition section 5410. The water entering the first flow channel 5410a flows forward and flows into the second flow channel 5420a at the end of the first flow channel. The water entering the second flow channel 5420a is guided backward. The water guided by the second flow channel 5420a flows from the front side (+Y) to the rear side (-Y). The water falls into the second chamber 112 through the opening 5420b. The falling water deflects toward the rear side (-Y) in the second flow channel 5420a along the direction of the water flow. The water outlet 112a is located at the rear. Therefore, when the water deflects toward the rear, it can be drained smoothly compared to the case where the water level is higher at the front. Therefore, according to the fifth embodiment, the drainage pressure at the water outlet 112a located at the rear is higher, and drainage becomes smoother, which allows the water surface inclination angle (∠a4) to be smaller. Alternatively, the water level at the rear may be higher depending on the circumstances. Therefore, when compared on the same time basis, the average water level (water level) is lower than that of the aforementioned embodiment.

[0210] <Sixth embodiment>

[0211] Will refer to Figure 17 and Figure 18 Description of the Sixth Embodiment In the following description, differences from the fifth embodiment will be mainly discussed.

[0212] The partition section 6410 divides the first chamber 111 into a first flow channel 6410 a and a second flow channel 6420 a .

[0213] The partition section 6410 may be a partition wall connecting the inner wall of the first chamber 111. The partition wall defining the partition section 6410 may connect the inner wall of the first chamber 111 in a substantially horizontal direction. The upper portion partitioned by the partition section 6410 is a first flow channel 6410a, and the lower portion is a second flow channel 6420a.

[0214] The partition section 6410 includes a partitioning surface 2510e for guiding water introduced through the water inlet 111a into the first flow channel 6410a. The partitioning surface 2510e extends downward from the rear of the partition section 6410 and connects to the partition wall 6420. In other words, the partitioning surface 2510e blocks the rear of the second flow channel 6420a. The partitioning surface 2510e is formed to be inclined. The partitioning surface 2510e is formed to tilt upward as it extends from the rear toward the front.

[0215] The partition section 6410 may be provided as a single component combined with the partition wall 6420. The combined structure of the partition wall 6420 and the partition section 6410 is referred to as a flow path forming portion 6400.

[0216] The outer portion of the partition section 6410 is arranged to contact the inner wall of the first chamber 111. The partition section 6410 has a portion on the front side that is spaced apart from the wall defining the first chamber 111. According to an embodiment, the length of the partition section 6410 is shorter than the length of the partition wall 6420. The front side of the partition wall 6420 is longer than the front side of the partition section 6410. Due to the length difference between the partition wall 6420 and the partition section 6410, the front side of the partition section 6410 can be spaced apart from the front inner wall of the first chamber 111.

[0217] In the following, reference will be made to Figure 19 The water flow in the sixth embodiment will be described.

[0218] Water introduced through the water inlet 111a does not flow into the second flow channel 6420a due to the partition surface 2510e, but first flows into the first flow channel 6410a. Then, the water guided forward along the first direction (+Y) through the first flow channel 6410a flows into the second flow channel 6420a and is guided backward along the second direction (-Y).

[0219] Water falls into the second chamber 112 through the opening 6420b. As in the fifth embodiment, the inclination angle (∠a5) of the water surface is relatively small compared to the other embodiments. In addition, when compared based on the same time, the average water level (water level) is lower. For details on the principle, please refer to the description provided in the fifth embodiment.

[0220] <Seventh embodiment>

[0221] In the following description, differences from the sixth embodiment will be mainly discussed.

[0222] In this embodiment, the guide portion of the sixth embodiment is not required. Instead, the opening 7420b can function as the guide portion. The following describes the opening 7420b.

[0223] A pair of openings 7420b may be formed on the left and right sides. The guide surface 7430a guides water passing through the openings 7420a toward the side surface of the filter 130. One guide surface 7430a is inclined toward the left side surface of the filter 130, and the other guide surface 7430a is inclined toward the right side surface of the filter.

[0224] The structure of the opening 7420b in this embodiment can also be applied to the first, second, and third embodiments of the guide portion. In other words, in the first, second, and third embodiments of the guide portion, the opening 7420b of this embodiment can be used to replace the guide portion.

[0225] While the present disclosure has been illustrated and described in connection with the specific embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the disclosure as defined by the appended claims.

[0226] [Description of Reference Signs]

[0227] Front: +Y

[0228] After: -Y

[0229] Clothes processing equipment: 1

[0230] Cabinets: 10

[0231] Plastic filter unit: 100

[0232] Front panel: 11

[0233] - Shell: 110

[0234] First Space: 110a

[0235] The third chamber: 110b

[0236] First chamber: 111

[0237] Water inlet: 111a

[0238] Second chamber: 112

[0239] Water outlet: 112a

[0240] Bottom surface: 112b

[0241] Ingress port: 113

[0242] Exit port: 114

[0243] Guide protrusion: 115

[0244] Valve Port: 119

[0245] Check valve: 119a

[0246] Right panel: 12

[0247] Drawers: 120

[0248] Front part: 121

[0249] Handle: 121a

[0250] First side section: 122

[0251] Second side part: 123

[0252] Bottom part: 124

[0253] Drawer outlet: 124a

[0254] Drawer body: 125

[0255] Internal space: 127

[0256] Placement section: 128

[0257] First sealing seat: 129a

[0258] Second sealing seat: 129b

[0259] Third sealing seat: 129c

[0260] Top panel: 13

[0261] Filters: 130

[0262] Filter components: 131

[0263] Frame: 132

[0264] Placement Section: 132a

[0265] Overflow opening: 134

[0266] Filter chamber: 135

[0267] Partition wall: 1400

[0268] Top surface: 1410

[0269] Opening: 1410a

[0270] Opening: 1410aa

[0271] Opening: 1410ab

[0272] Boot section: 1420

[0273] - Guide surface: 1420a

[0274] Doors: 15

[0275] Attachment: 150

[0276] Magnetic components: 151

[0277] Friction member: 152

[0278] Sealing member: 160

[0279] First sealing member: 161

[0280] Second sealing member: 162

[0281] Third sealing member: 163

[0282] Roller: 20

[0283] Partition wall: 2400

[0284] Top surface: 2410

[0285] Opening: 2410a

[0286] Opening: 2410aa

[0287] Opening: 2410ab

[0288] Boot section: 2420

[0289] - Guide surface: 2420a

[0290] Barrel: 30

[0291] Partition wall: 3400

[0292] Opening: 3410a

[0293] Detergent storage unit: 40

[0294] Partition wall: 400

[0295] Opening: 410a

[0296] Guide portion: 420 Guide surface: 420a Partition wall: 4400 Opening: 4410a

[0297] Flow channel forming part: 5400 Separation section: 5410

[0298] First flow channel: 5410a Sealing part: 5410e Partition wall: 5420 Opening: 5420a

[0299] Second flow channel: 5420a Opening: 5420b

[0300] Guide part: 5430 Guide surface: 5430a Filter unit: 50 Drain pump: 61

[0301] Circulation pump: 62 Flow channel forming part: 6400 Partition wall: 6420

[0302] First flow channel: 6410a Dividing surface: 6410e

[0303] Second flow channel: 6420a

[0304] First flow channel: 6410a Opening: 6410a

[0305] Second flow channel: 6420a Guide portion: 6430 Guide surface: 6430a Supply flow channel: 71

[0306] First supply pipe: 71a

[0307] Second supply pipe: 71b Discharge flow channel: 73 Circulation channel: 74 Drain flow channel: 75

[0308] First drain hose: 75a

[0309] Second drain hose: 75b Opening: 7420b

[0310] Guide surface: 7430a Drain pipe: Drain pipe Average water level: Water level

[0311] Rotation axis: O

[0312] Control Unit: P

[0313] Input unit: P1

[0314] Display: P2

Claims

1. A filter device for a washing machine, the filter device comprising: a first chamber including a water inlet allowing wash water to be introduced therethrough; a second chamber having a water outlet for the wash water; a filter housed in the second chamber; as well as an opening allowing the first chamber and the second chamber to communicate with each other through the opening, The wash water introduced through the water inlet sequentially passes through the first chamber, the opening, and the filter, and is discharged through the water outlet.

2. A filter device for a washing machine, the filter device comprising: a housing having a water inlet and a water outlet; a partition wall disposed inside the housing and dividing the interior of the housing into a first chamber and a second chamber; an opening provided in the partition wall and allowing the first chamber and the second chamber to communicate with each other through the opening; as well as a filter housed in the second chamber of the housing, The wash water introduced through the water inlet sequentially passes through the first chamber, the opening, and the filter, and is discharged through the water outlet.

3. The filter device according to claim 1 or 2, further comprising: a guide portion provided downstream of the opening to guide the wash water flowing into the second chamber from the opening to a side surface of the filter, The wash water discharged through the opening and guided to the side surface of the filter by the guide portion separates particles adhered to the side surface of the filter and guides the separated particles to a bottom portion of the filter.

4. The filter device according to claim 3, wherein The guide portion includes a guide surface extending downward from the opening and toward the side surface of the filter.

5. The filter device according to claim 4, wherein The guide portion is an inclined surface of an inner wall of the opening.

6. The filter device according to claim 1 or 2, wherein: The filter includes a left side surface, a right side surface, a front surface, a rear surface and a bottom surface, Wherein, the vertical lengths of the left side surface and the right side surface are greater than the distance between the left side surface and the right side surface, so that particles separated from the left side surface and the right side surface are accumulated from the lower parts of the left side surface and the right side surface, so as to maintain the filtering performance of the left side surface and the right side surface of the filter.

7. The filter device according to claim 6, wherein The filter includes the left side surface, the right side surface, the front surface, the rear surface and the bottom surface, The distance between the front surface and the rear surface is greater than the distance between the left surface and the right surface.

8. The filter device according to claim 7, wherein The filter is removable from the second chamber.

9. The filter device according to claim 8, further comprising: a drawer configured to accommodate the filter, The drawer can be withdrawn from the second chamber in a forward direction.

10. The filter device according to claim 9, wherein The drawer includes a drain portion in communication with the water outlet.

11. The filter device according to claim 9, wherein The filter is removable from the drawer through the open top of the drawer.

12. The filter device according to claim 9, wherein The left and right sides of the drawer are spaced apart from the left and right sides of the filter by a predetermined distance. Wherein, a bottom surface of the drawer is spaced apart from a bottom surface of the filter by a predetermined distance.

13. The filter device according to claim 12, wherein The drawer includes at least one of the following: spacing protrusions provided on both side surfaces of the drawer; or A support member is provided on the bottom surface of the drawer.

14. The filter device according to claim 9, wherein A bottom surface of the drawer is inclined downward toward the water outlet.

15. The filter device of claim 1, further comprising: A coupling member is detachably attached to an outer surface of one of the first chamber and the second chamber at a predetermined position.

16. The filter device of claim 2, further comprising: A coupling member is detachably attached to an outer surface of the housing at a predetermined position.

17. The filter device according to claim 15 or 16, wherein The coupling member includes a magnetic member or a friction member.

18. The filter device according to claim 1 or 2, wherein The water inlet and the water outlet are positioned at a rear side of the washing machine equipped with the filter device.

19. A washing machine comprising a drainage channel, the washing machine comprising: The filter device according to claim 1 or 2, wherein the filter device is arranged in the drainage flow channel.

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