CN118056044A

CN118056044A - Washing machine

Info

Publication number: CN118056044A
Application number: CN202280066856.1A
Authority: CN
Inventors: 饭塚亚纪子; 关谷祯夫; 上野真司; 松本幸司
Original assignee: Hitachi Global Life Solutions Inc
Current assignee: Hitachi Global Life Solutions Inc
Priority date: 2022-01-25
Filing date: 2022-07-22
Publication date: 2024-05-17
Also published as: JP2023108446A; WO2023145107A1

Abstract

The washing machine of the present invention comprises a drain path (9) flowing from an outer tub (2) to a drain port (9 a), a circulation path (8) for circulating washing water from the outer tub (2), and a collection filter (10) for collecting microplastic in the drain path (9), wherein the flow direction of water flowing in the circulation path (8) is the surface direction of the collection filter (10). The collection filter (10) is disposed substantially parallel to the circulation path (8). The inner wall surface (10 a) of the collection filter (10) is coplanar with the inner wall surface (8 a 2) of the circulation path (8).

Description

Washing machine

Technical Field

The present invention relates to a washing machine.

Background

The washing and drying machine has a vertical type in which the rotation axis of the inner tub is substantially perpendicular to the installation surface, and a drum type in which the rotation axis of the inner tub is horizontal or slightly inclined. For example, in a drum-type washing machine, washing water in which a detergent or the like is dissolved is uniformly impregnated into laundry by drawing the washing liquid and applying it to the laundry. In this way, the drum-type washing machine performs washing by a tumbling motion, circulation of washing water by a circulation pump, and the like. The cloth rubs during the washing stroke, thereby creating thread ends. The thread ends produced include micro plastics such as microplastic and microfiber, but since they are of a micro size, the mesh size is large in the conventional filter, and it is difficult to trap them.

Accordingly, patent document 1 proposes a washing machine in which a filter for trapping micro thread ends such as microplastic and microfiber is provided behind a detergent casing that is a part of a circulation path, and the microplastic is trapped.

Patent document 2 proposes a washing machine in which a filter for trapping microplastic is provided at a branching point between a circulation path and a drain path, and a filter device is controlled so that water flows into a second filter region when a first filter region is clogged, thereby extending a time until the filter is clogged.

Prior art literature

Patent literature

Patent document 1: WO2020/251513

Patent document 2: EP 3663457A

Disclosure of Invention

Problems to be solved by the invention

However, in the washing machine described in patent document 1, there is a concern that the filter is liable to be clogged when the mesh size is reduced in order to increase the collection rate of the produced microplastic.

In the washing machine described in patent document 2, when the mesh size is reduced to increase the collection rate of the produced microplastic, even if the first filter region is clogged, water in the second filter region flows, and therefore, the time until the clogging becomes longer than that in the washing machine of patent document 1, but the clogging is eventually caused, and the drain time may be prolonged.

The present invention solves the above-described conventional problems, and an object of the present invention is to provide a washing machine capable of trapping microplastic and preventing delay of drainage time.

Means for solving the problems

The present invention is characterized by comprising: a drain path which flows from the washing tank to the drain port; a circulation path for circulating the washing water from the washing tank; and a thread end trapping part for trapping the microplastic in the water discharge path, wherein the flow direction of the water flowing in the circulation path is the surface direction of the thread end trapping part.

The effects of the invention are as follows.

According to the present invention, it is possible to provide a washing machine capable of trapping microplastic and preventing delay of drainage time.

Drawings

Fig. 1 is a schematic configuration diagram of a washing machine of a first embodiment.

Fig. 2 is a schematic diagram showing a thread end trapping device of the first embodiment.

Fig. 3 is a sectional view taken along line III-III of fig. 2.

Fig. 4A is a schematic view showing a thread end trapping device according to the first embodiment, in which water flows toward a drain port.

Fig. 4B is a schematic view showing a case where the thread end trapping device according to the first embodiment is configured such that water flows into a circulation path.

Fig. 4C is a schematic view of a case where the trapping filter has a slope in the thread end trapping device of the first embodiment.

Fig. 5A is a schematic view showing a thread end trapping device according to a second embodiment, in which water flows toward a drain port.

Fig. 5B is a schematic view showing a thread end trapping device according to a second embodiment, in which water flows into a circulation path.

Fig. 6 is a schematic structural view of a washing machine of the third embodiment.

Fig. 7A is a schematic view showing a thread end trapping device according to a third embodiment, in which water flows toward a drain port.

Fig. 7B is a schematic view showing a thread end trapping device according to a third embodiment, in which water flows into a circulation path.

Detailed Description

Hereinafter, an embodiment example of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following embodiment, and various modifications and application examples are included in the technical concept of the present invention.

(First embodiment)

Fig. 1 is a schematic configuration diagram of a first embodiment of the present invention applied to a drum-type washing machine.

As shown in fig. 1, a drum-type washing machine 100A (hereinafter simply referred to as a washing machine) is configured such that an outer tub 2 is provided inside a casing 3, and an inner tub 1 (drum) for receiving laundry 7 is provided inside the outer tub 2. The rotation axis of the inner tank 1 is inclined or substantially horizontal so that the front side is higher than the rear side. In the present embodiment, the outer tank 2 and the inner tank 1 constitute a washing tank. The washing machine 100A shown in fig. 1 is a schematic view showing only a minimal essential part of the first embodiment.

A space is provided between the outer tank 2 and the inner tank 1, and water passes through the space. The washing water is supplied to the lower portion of the outer tub 2, and is circulated by the circulation pump 4, returning to the inner tub 1 through the circulation path 8.

The washing machine 100A further includes a thread end catching device 110A. The thread end collecting device 110A includes a circulation path 8, a drainage path 9, and a collecting filter 10 (thread end collecting section).

The circulation path 8 is configured to include a pipe 8a connecting the bottom of the outer tank 2 to the suction side (inlet) of the circulation pump 4 and a pipe 8b connecting the discharge side (outlet) of the circulation pump 4.

The drain path 9 is a flow path through which washing water flows from the washing tub to the drain port 9a, and includes a pipe 9b connecting the bottom of the outer tub 2 to the drain port 9 a. The drain path 9 is provided with an electromagnetic drain valve 6 of the on-off type (full-open and full-closed only).

The pipe 8a of the circulation path 8 and the pipe 9b of the drain path 9 share a path from the bottom of the outer tank 2 to the collection filter 10, and are formed of one pipe.

With this configuration, the flow of water (washing water) from the bottom of the outer tub 2 is a path into the circulation pump 4 and a path through the drain valve 6 to the drain port 9 a. The collection filter 10 is provided on the inlet side (suction side) of the circulation pump 4.

Further, a trap filter 10 is provided in the middle of the drain path 9 from the outer tank 2 to the drain port 9 a. The trapping filter 10 has a function of trapping the thread ends (including microplastic and microfiber) generated from the laundry 7 and preventing the thread ends from flowing to the drain port 9 a. The mesh size of the trapping filter 10 is, for example, 1 μm to 3mm, and is preferably about 50 μm to 700 μm in order to trap a predetermined amount of microplastic and prevent delay in drainage time. In addition, the thread ends are generated by friction of laundry during washing and drying.

A thread end catching unit 11 for catching thread ends is provided in the pipe 8a between the catch filter 10 and the circulation pump 4. The thread end catching part 11 includes a filter part detachable from the case 3. That is, the filter unit is removed from the case 3, the thread ends are removed from the filter unit and cleaned, and the filter unit is attached to the case 3 again.

As shown in fig. 2, the trapping filter 10 has a function of trapping the thread 40 generated from the laundry (see fig. 1) and preventing the thread 40 from flowing to the drain port 9a (see fig. 1). The thread ends 40 are generated by friction of laundry during washing and drying.

The collection filter 10 is provided at a branching point S1 (branching portion) between the circulation path 8 and the drainage path 9. The pipe 9b of the water discharge path 9 is configured to extend in a direction orthogonal or substantially orthogonal to the pipe 8a of the circulation path 8. The collection filter 10 is provided substantially parallel to the flow direction F of the water flowing through the circulation path 8 (pipe 8 a). That is, the trap filter 10 is configured such that the surface (surface) of the plurality of holes through which the washing water from which the foreign matter such as the lint 40 has been removed passes is parallel or substantially parallel to the flow direction F of the water. In other words, the flow direction of the water flowing through the circulation path 8 is the surface direction of the collecting filter 10.

A thread end catching unit 11 is provided between the circulation path 8 and the circulation pump 4 and the branch point S1 (the collection filter 10). When the thread 40 reaches the thread end catching part 11, the thread end 40 is caught (entangled) by the filter part of the thread end catching part 11, and the thread end 40 is restrained from returning into the inner tank 1 (see fig. 1). The mesh size of the filter (second mesh filter) of the thread end catching part 11 is the same as the mesh size of the catching filter 10 (mesh filter) or larger than the mesh size of the catching filter 10 (mesh filter).

Fig. 3 is a sectional view taken along line III-III of fig. 2.

As shown in fig. 3, the pipe 8a of the circulation path 8 is formed in a cylindrical shape, for example, and a pipe 9b of the drain path 9 is connected to the lower surface of the pipe 8 a. Further, a hole 8a1 having the same extent as the inner diameter of the pipe 9b is formed in the pipe 8a so as to penetrate the pipe 8 a. A trapping filter 10 is fitted into the hole 8a1. The collecting filter 10 is formed in a plate shape, and an inner wall surface 10a of the collecting filter 10 and an inner wall surface 8a2 of the pipe 8a are formed to be coplanar. In other words, the trap filter 10 and the inner wall surface 8a2 have no level difference, and are in a flat state, specifically, the trap filter 10 is disposed so as not to protrude radially inward from the inner wall surface 8a2, and does not obstruct the flow direction of the washing water from the outer tub 2. The inner wall surface 10a of the collection filter 10 and the inner wall surface 8a2 of the pipe 8a are preferably coplanar, but may be non-coplanar and have a height difference.

The material of the trapping filter 10 may be a material made of a fiber such as a polyester fiber or nylon, but if a material made of a metal (e.g., copper or stainless steel) is used, microorganisms are difficult to propagate, and the trapping filter is sanitary. In the case of using the metal collecting filter 10, it is preferable to use a member having holes formed in a metal plate by etching or the like, as compared with a mesh member. This is because no irregularities (burrs or the like) are formed on the surface of the collecting filter 10, so that the yarn is difficult to wind around the mesh of the collecting filter 10 and the thread ends are easily moved. The surface of the collection filter 10 may be subjected to hydrophilicity-improving treatment using oxygen plasma, a coating agent, or the like. By performing the hydrophilicity-improving treatment in this way, water is easy to flow, and delay in drainage time can be prevented.

Next, an operation of the washing machine 100A including the thread end catching device 110A will be described with reference to fig. 4A and 4B. Fig. 4A is a schematic view showing a thread end trapping device according to the first embodiment, in which water flows toward a drain port. Fig. 4B is a schematic view showing a case where the thread end trapping device according to the first embodiment is configured such that water flows into a circulation path.

In the washing machine 100A, when the washing process is completed, a water discharge process for discharging the washing water (washing water) to the outside is performed, and then a dehydration process is performed. When the dehydration process is completed, the washing process is shifted to the rinsing process. In the rinsing step, water is accumulated in a washing tank (outer tank 2), and a circulation pump 4 is driven to circulate the washing water, and then a water discharge process is performed to perform a dehydration step.

The washing process of the washing machine 100A will be described, and the user puts the laundry 7 into the inner tub 1 and starts washing, closes the drain valve 6, detects the amount of cloth (the amount of the laundry 7) as needed, and supplies water to the outer tub 2. A predetermined amount of water is stored in the outer tank 2, and the washing water is circulated in the inner tank 1 by the circulation pump 4. While circulating the washing water, the inner tub 1 is rotated to perform a tumbling motion for moving the laundry 7 from top to bottom, thereby removing dirt from the laundry 7. At this time, the laundry 7 rubs to generate a thread end. When the circulation pump 4 is driven, thread ends are present at respective positions of the circulation path 8. After the end of the washing stroke, the drain valve 6 is opened, and the washing water is discharged to the drain port 9 a.

At this time, as shown in fig. 4A, the washing water from the bottom of the outer tub 2 flows into the pipe 9b of the drain path 9 at the branching point S1. Further, since the thread 40 generated during washing cannot pass through the collecting filter 10, only the washing water passes through the collecting filter 10, and the thread is caught by the collecting filter 10.

After the cleaning stroke, it moves to the rinsing stroke. In the rinsing stroke, the drain valve 6 is closed again to accumulate water in the lower portion of the outer tub 2. Then, the circulation pump 4 is driven to circulate water through the circulation path 8 to rinse the laundry 7. At this time, as shown in fig. 4B, the circulation pump 4 is driven to circulate the water, and the thread 40 trapped on the surface of the trapping filter 10 moves downstream (on the circulation pump 4 side) due to the water flow at the time of circulation, so that the thread 40 is not present on the surface of the trapping filter 10 (the thread 40 is removed from the surface of the trapping filter 10). In this way, the thread 40 moves from the collecting filter 10 because the collecting filter 10 is disposed substantially parallel to the flow direction of the washing water flowing through the circulation path 8.

After the end of the rinsing stroke, the drain valve 6 is opened to drain the washing water inside the outer tub 2. At this time, since the thread 40 is not provided on the surface of the trapping filter 10, the trapped thread 40 is prevented from being lost in pressure and the drain time is prevented from being prolonged (the drain time is delayed).

Further, by providing the trap filter 10, the thread 40 is prevented from flowing to the drain port 9a through the drain path 9 (pipe 9 b), and thus the drain port 9a can be prevented from being blocked.

As described above, the washing machine 100A of the first embodiment includes the drain path 9 flowing from the outer tub 2 to the drain port 9a, the circulation path 8 for circulating the washing water from the outer tub 2, and the collection filter 10 for collecting the lint 40 at the branching point S1 between the drain path 9 and the circulation path 8. The collection filter 10 is provided substantially parallel to the flow direction of the water flowing through the circulation path 8 (see fig. 4A and 4B). Here, substantially parallel means a slight inclination due to a design error or a manufacturing error, and includes an inclination of about ±1°, for example. Thus, the thread 40 moves from the catch filter 10 during the water discharge in the rinsing stroke, and thus the water discharge time can be prevented from being prolonged. Fig. 4C is a schematic view of a case where the trapping filter 10 has a slope in the thread end trapping device of the first embodiment. In this way, even if the trap filter 10 is provided so as to have a slope exceeding the inclination due to the design error and the manufacturing error described above with respect to the circulation path, that is, the flow of the water flowing through the circulation path 8, the drain time can be prevented from being prolonged. The slope may be oriented downward left or upward left in a range from the upstream side to the downstream side of the water flowing through the circulation path 8.

In the first embodiment, the circulation pump 4 for circulating the washing water is provided, and the collection filter 10 is provided on the inlet side of the circulation pump 4 (see fig. 2). Accordingly, a thrust force for moving the thread 40 deposited on the collection filter 10 from the surface of the collection filter 10 is easily generated. Even when the circulation pump is not provided, a water flow flowing through the circulation path is generated by the rotational force of the drum, and a thrust force is generated to move the thread 40 deposited on the collection filter 10 from the surface of the collection filter 10.

In the first embodiment, the thread end catching portion 11 (see fig. 2) that catches the thread end 40 is provided in the circulation path 8. This reduces the number of the thread ends 40 returned to the inner tank 1 through the circulation path 8.

In the first embodiment, the trapping filter 10 is formed by forming holes in a metal plate by etching. In particular, since irregularities are not formed at the edges of the holes formed in the collection filter 10, the yarn of the yarn end 40 is less likely to be entangled in the mesh holes of the collection filter 10, and the yarn end is likely to be moved when the circulation pump 4 is driven in the rinsing stroke.

Further, by applying the thread end catching device 110A to the washing machine 100A, microplastic can be caught, and delay of the drain time can be prevented, and extension of the washing time can be prevented.

(Second embodiment)

Fig. 5A is a schematic view showing a thread end trapping device according to a second embodiment, in which water flows toward a drain port. Fig. 5B is a schematic view showing a thread end trapping device according to a second embodiment, in which water flows into a circulation path. The same components as those of the first embodiment are denoted by the same reference numerals, and overlapping description thereof is omitted.

As shown in fig. 5A, the thread end trapping device 110B of the second embodiment is configured such that a foreign matter trap 12 is added to the thread end trapping device 110A of the first embodiment. Also, the thread end catching device 110B is applied to the drum type washing machine as in the first embodiment.

A foreign matter trap (foreign matter trap portion) 12 is provided in the pipe 8a on the inlet side of the circulation pump 4, and traps foreign matters different from the thread ends. The foreign matter trap 12 is provided upstream of the thread end catching portion 11. Such a foreign matter trap 12 prevents foreign matters such as buttons that have fallen from the laundry 7 during washing and coins that have forgotten to be taken out of the pocket of the laundry 7 from entering the circulation pump 4. This can prevent the circulation pump 4 from malfunctioning. Further, by adopting a two-stage structure in which a large foreign matter is captured by the foreign matter trap 12 and a small thread is captured by the thread-end capturing portion 11, the occurrence of clogging of the thread-end capturing portion 11 can be delayed.

Further, since the foreign matter trap 12 is provided to prevent articles larger than the thread 40, such as buttons, from entering the circulation pump 4, when a filter is used as the foreign matter trap 12, the mesh size of the filter may be larger than the trapping filter 10. Further, by increasing the mesh size of the filter, the pressure loss can be reduced.

The foreign matter trap 12 does not need to be a filter, and may be any mesh of a size through which foreign matters such as a square-grid-like or rod-like structure cannot pass.

(Third embodiment)

As shown in fig. 6, a thread end catching device 110C of the third embodiment is mounted on a vertical washing machine (vertical washing dryer) 100B.

The washing machine 100B includes an outer tub 22 made of synthetic resin and having an inner tub 21 (washing tub) inside a casing 23 (outer frame). The inner tank 21 has a rotation axis in the vertical direction, and is rotatably supported in the outer tank 22. Further, the washing machine 100B shown in fig. 6 is a diagram showing only a main portion.

The inner tub 21 has a plurality of dewatering holes 21a (only a part of which is shown) in a peripheral wall for separating and discharging washing water contained in the laundry 7 from the laundry 7 by centrifugal force.

A stirring vane 24 is rotatably provided at the bottom of the inner tank 21. The stirring blade 24 is formed in a disk shape by being bent upward so that the peripheral edge portion gradually increases, and rotates in a state of receiving the laundry 7. Holes (not shown) are formed in the stirring vane 24 at a plurality of positions so as to communicate the front surface with the rear surface. Thereby, the washing water flows into the back side of the stirring vane 24.

A rear blade 24a (blade portion) radially extending from the rotation center is formed on the rear surface (lower surface) of the stirring blade 24. The back blades 24a are disposed at equal angles (for example, every 30 degrees) in the circumferential direction. A plurality of reinforcing plates are provided on the back surface of the stirring vane 24 concentrically or substantially concentrically around the rotation axis. By providing the rear surface blades 24a in this manner, the washing water on the bottom surface of the inner tub 21 is pushed out radially outward.

A driving device 25 for rotating the inner tub 21 and the stirring vane 24 is provided outside the bottom of the outer tub 22. The driving device 25 has a function of selectively rotating the stirring vane 24 left and right (stirring mode) while the inner tank 21 is stationary, and integrally rotating the inner tank 21 and the stirring vane 24 in the same direction (dehydration mode). The stirring blade 24 repeatedly rotates forward and backward in accordance with a command from a control device (not shown), and agitates the laundry 7 put into the inner tub 21 up and down, thereby performing washing, rinsing, and the like.

A circulation flow path member 21b is provided on the inner peripheral surface of the inner tank 21. The circulation flow path member 21b is disposed on the inner wall surface of the inner tank 21 in the axial direction of the inner tank 21. The number of the circulation flow path members 21b is not limited to two, but may be three or more.

The circulation flow path member 21b is formed of a substantially plate-like member extending in the up-down direction with a predetermined width, and has an opening (not shown) formed in an upper portion thereof. The circulation flow path member 21b is provided with a thread end catching portion 31 for catching a thread end or the like.

The thread end catching portion 31 is configured to be detachable from the circulation passage member 21 b. That is, the filter unit is removed from the case 23 (the inner tank 21), the wire ends are removed from the filter unit and cleaned, and the wire ends are attached to the case 23 (the inner tank 21) again.

The circulation flow path member 21b is formed of synthetic resin, and a separate circulation water path 21c is formed between the circulation flow path member and the inner tank 21. An inlet 21d for allowing the wash water to flow into the circulation water path 21c is provided at a lower portion of the circulation flow path member 21 b.

In the washing machine 100B provided with such a circulation flow path member 21B, a circulation water path 21c is provided so as to communicate with a pump chamber formed by an inner peripheral side (inner bottom) of a bottom plate of the inner tub 21 and an outer peripheral side of a rear surface vane 24a provided on a rear surface of the stirring vane 24. The washing water is pushed outward by the centrifugal force generated by the rotation of the back surface blades 24a provided on the back surface of the stirring blade 24, and thereby the washing water rises through the circulation water channel 21c, and is intermittently injected from the opening provided in the upper portion of the circulation flow channel member 21 b.

The thread end trapping device 110C is configured to include a circulation path 28, a drainage path 29, and a trapping filter 30 (thread end trapping portion).

The circulation path 28 is a flow path for returning the washing water to the inside of the inner tub 21 again, and is constituted by the outer periphery of the back surface blade 24a, the inflow port 21d, and the circulation water path 21 c.

The drain path 29 is a flow path through which the washing water flows from the washing tub to the drain port 9a, and includes a pipe 29b connecting a hole 29c formed in the bottom of the outer tub 22 to the drain port 29 a. The drain path 29 is provided with an electromagnetic drain valve 26 that opens and closes.

The collection filter 30 is provided at a branching point S2 (see fig. 7A) between the circulation path 28 and the drain path 92. The collection filter 30 is provided substantially parallel to the flow direction F (see fig. 7A) of the water flowing through the circulation path 28 located on the bottom surface of the inner tank 21. That is, the trap filter 30 is configured such that the surface through which the washing water from which the foreign matter such as the lint 40 has been removed passes is parallel or substantially parallel to the flow direction F of the water.

The collection filter 30 is formed at a position not overlapping with the position in the circumferential direction of the circulation flow path member 21 b. This can suppress a decrease in circulation flow rate due to the washing water circulating from the outer periphery of the rear surface blade 24a toward the circulation flow path member 21b being discharged to the outer tank 22 side through the collection filter 30.

Further, a trap filter 30 is provided in the middle of the drain path 9 from the outer tank 22 to the drain port 29 a. The trapping filter 30 has a function of trapping the lint generated from the laundry 7 and preventing the lint from flowing to the drain port 29 a. In addition, the thread ends are generated by friction of laundry during washing and drying.

Next, an operation of the washing machine 100B including the thread end catching device 110C will be described with reference to fig. 7A and 7B. Fig. 7A is a schematic view showing a thread end trapping device according to a third embodiment, in which water flows toward a drain port. Fig. 7B is a schematic view showing a thread end trapping device according to a third embodiment, in which water flows into a circulation path.

In the washing step of the washing machine 100B, when the user puts the laundry 7 into the inner tub 21 to start washing, the drain valve 26 is closed, and the amount of cloth (the amount of the laundry 7) is detected as needed, thereby supplying water to the outer tub 22. When a predetermined amount of water is stored in the outer tub 22, the stirring vane 24 is rotated in the forward and reverse directions, and the washing water is circulated in the inner tub 21. At this time, the laundry 7 rubs to generate a thread end. After the end of the washing stroke, the drain valve 26 is opened, and the washing water is discharged to the drain port 29 a.

At this time, as shown in fig. 7A, the washing water from the bottom of the inner tub 21 flows into the pipe 29b of the drain path 29 at the branching point S2. Further, since the thread 40 generated during washing cannot pass through the collecting filter 30, only the washing water passes through the collecting filter 30, and the thread 40 is caught by the collecting filter 30.

After the cleaning stroke, it moves to the rinsing stroke. In the rinsing stroke, the drain valve 26 is closed again to accumulate water in the lower portion of the outer tub 22. Then, the stirring blade 24 is rotated in the forward and reverse directions, and water is circulated through the circulation path 28 to rinse the laundry 7. At this time, as shown in fig. 7B, the washing water (rinse water) is circulated by the rotational force of the back blade 24a of the stirring blade 24, and the thread 40 caught by the surface of the collecting filter 30 moves downstream by the water flow at the time of circulation, so that the thread 40 is not present on the surface of the collecting filter 30 (the thread 40 is removed from the surface of the collecting filter 30).

After the end of the rinsing stroke, the drain valve 26 is opened to drain the washing water inside the outer tub 22. At this time, since the thread 40 is not provided on the surface of the trapping filter 30, the trapped thread 40 is prevented from being lost in pressure and the drain time is prevented from being prolonged (the drain time is delayed).

Further, since the trap filter 30 is provided to prevent the thread 40 from flowing through the drain path 29 (pipe 29 b) to the drain port 29a, the drain port 29a can be prevented from being blocked.

As described above, the lint trap 110C of the third embodiment includes the drain path 29 that flows from the inner tank 21 to the drain port 29a, the circulation path 28 that circulates the washing water from the inner tank 21, and the trap filter 30 that traps the lint 40 at the branching point S2 between the drain path 29 and the circulation path 28. The collection filter 30 is provided substantially parallel to the flow direction of the water flowing through the circulation path 28 (see fig. 7A and 7B). Thus, the thread 40 moves from the catch filter 30 during the water discharge in the rinsing stroke, and thus the water discharge time can be prevented from being prolonged.

Further, by applying the thread end trapping device 110C to the washing machine 100B, microplastic can be trapped, and delay of the drain time can be prevented, so that shortening of the washing time can be achieved.

Symbol description

1. 21-Inner tank (washing tank), 2, 22-outer tank (washing tank), 3, 23-tank, 4-circulation pump, 6, 26-drain valve, 7-washings, 8, 28-circulation path, 9, 29-drain path, 9a, 29 a-drain port, 10, 30-trapping filter (thread end trapping part), 11, 31-thread end trapping part, 12-foreign matter trap, 21 a-dehydration hole, 21B-circulation flow path member, 21C-circulation water path, 24-stirring wing, 24 a-back blade, 40-thread end, 100A, 100B-washing machine, 110A, 110B, 110C-thread end trapping device, S1, S2-branching point.

Claims

1. A washing machine is characterized by comprising:

A drain path which flows from the washing tank to the drain port;

A circulation path for circulating the washing water from the washing tank; and

A thread end trapping part for trapping the microplastic in the drainage path,

The flow direction of the water flowing through the circulation path is the surface direction of the lint collecting portion.

2. A washing machine as claimed in claim 1, characterized in that,

The thread end trapping part is arranged substantially parallel to the circulation path.

3. A washing machine as claimed in claim 1, characterized in that,

The thread end trapping part has a slope with respect to the circulation path.

4. A washing machine as claimed in claim 2, characterized in that,

The inner wall surface of the thread end trapping part is coplanar with the inner wall surface of the circulation path.

5. A washing machine as claimed in any one of claims 1 to 4, wherein,

Comprises a circulating pump for circulating the washing water,

The thread end trapping part is arranged at the inlet side of the circulating pump.

6. A washing machine as claimed in any one of claims 1 to 4, wherein,

The circulation path is provided with a thread end catching part for catching thread ends.

7. A washing machine as claimed in claim 5, wherein,

The inlet side of the circulating pump is provided with a foreign matter catching part for catching foreign matters.

8. A washing machine as claimed in claim 6, wherein,

The thread end catching part is provided with a foreign matter catching part for catching foreign matters at the inlet side.

9. A washing machine as claimed in any one of claims 1 to 4, wherein,

The thread end trapping part is a member having a plurality of holes formed in a metal plate.

10. A washing machine as claimed in claim 6, wherein,

The thread end trapping part is a net filter,

The thread end catching part is provided with a second net filter,

The mesh size of the second mesh filter is the same as or larger than the mesh size of the mesh filter.