WO2023061252A1

WO2023061252A1 - Filtering device and washing machine

Info

Publication number: WO2023061252A1
Application number: PCT/CN2022/123410
Authority: WO
Inventors: 竹内晴美
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2021-10-11
Filing date: 2022-09-30
Publication date: 2023-04-20
Also published as: CN116438344A; JP2023057394A

Abstract

Provided are a filtering device capable of suppressing blockage in a filter to ensure smooth flow of water in a drainage path and a washing machine comprising the filtering device. The filtering device (21) comprises a filter (41), a scraping member (62), and a storage chamber (48A). The filter (41) is provided with a tub (46) configured in the drainage path of the washing machine and provided with an inner peripheral surface portion (46A), a capture chamber (41A) in the tub (46) divided by the inner peripheral surface portion (46A), and a plurality of filter holes (52A) distributed in the inner peripheral surface portion (46A). The filter (41) captures foreign matters contained in water flowing from the filter holes (52A) to the outside of the tub (46) on the inner peripheral surface portion (46A). The scraping member (62) is configured in the capture chamber (41A), rotates about the central axis (K) of the inner peripheral surface portion (46A), and scrapes the foreign matters from the inner peripheral surface portion (46A). The storage chamber (48A) is configured outside the tub (46). The tub (46) is provided with a communication port (49B) for communicating the capture chamber (41A) with the storage chamber (48A).

Description

Filtration device and washing machine

technical field

The invention relates to a filter device and a washing machine comprising the filter device.

Background technique

The washing machine described in the following Patent Document 1 includes: a cabinet; a washing tub disposed in the cabinet; a drainage path for discharging water in the washing tub to the outside of the cabinet; and a drainage filter mounted and disassembled in the drainage path. The drain filter includes a comb having a plurality of pin teeth. When the drain water flowing through the drain path passes around the pin teeth in the drain filter, foreign matter contained in the drain water is caught by being caught on the pin teeth.

The drainage filter described in Patent Document 1 is designed to capture long foreign objects such as lint and hair. Therefore, the drainage filter is less likely to be clogged because the gap between adjacent pin teeth in the comb portion, that is, the filter hole is large. On the other hand, there has been a growing demand for countermeasures to prevent the release of tiny resinous foreign substances of about 100 μm called microplastics into the natural world. When laundry using chemical fibers is washed in a washing machine, microplastics may be generated from the lint of the chemical fibers and be discharged out of the machine through the drain.

Drain filters can become clogged more easily when the filter pores are made smaller in order to trap microplastics. The clogging of the drain filter can be temporarily eliminated by peeling the trapped foreign matter from the filter hole. However, the peeled foreign matter will remain in the drain filter, and the subsequent foreign matter will flow into the drain filter. Therefore, when the amount of foreign matter in the drain filter, in other words, the concentration of the foreign matter increases, even if repeated Peel off foreign matter, and the drain filter will clog quickly, too. In this case, the flow of water in the drainage channel deteriorates, and necessary drainage performance cannot be ensured.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2020-103718

Contents of the invention

The problem to be solved by the invention

The present invention has been made against such a background, and an object of the present invention is to provide a filter device capable of suppressing clogging of the filter and ensuring smooth flow of water in a drainage channel, and a washing machine including the filter device.

solutions to problems

The present invention is a filtering device, comprising: a filter provided with a cylindrical part disposed in the drain passage of a washing machine and provided with a cylindrical inner peripheral surface; A capture chamber, an intake port for taking water flowing through the drainage channel into the capture chamber, and a plurality of filter holes distributed on the inner peripheral surface, the filter captures water from the inner peripheral surface The foreign matter contained in the water flowing out of the cylindrical part from the filter hole after the intake port is taken into the capture chamber; the rotating body rotates around the central axis of the inner peripheral surface; the scraping member is arranged on the The capture chamber scrapes foreign matter from the inner peripheral surface while rotating together with the rotating body; and the storage chamber is arranged outside the cylindrical portion, and the The communication port through which the chamber communicates with the storage chamber.

In addition, the present invention is characterized in that the scraping member is slidable between an advanced position close to the inner peripheral surface and a retracted position away from the inner peripheral surface, and the filtering device includes: a biasing member The advancing position side applies force to the scraping member.

In addition, the present invention is characterized in that the filter device includes a push-in member for pushing the scraping member in front of the push-in member passing through the communication port toward the retracted position side.

In addition, the present invention is characterized in that another communicating port is provided in the cylindrical portion for communicating the capture chamber and the storage chamber, and a net is arranged at the other communicating port.

In addition, the present invention is a washing machine, comprising: a washing tub for storing laundry; a drainage path connected to the washing tub; a housing provided with a partial internal space constituting the drainage path; and the filter device, The washing machine is characterized in that the filter device can be detached from the housing, and when the filter device is attached, the filter is arranged in the inner space, and the central axis is aligned with the filter device. The detachment direction of the casing is parallel, and the washing machine includes: a driving part that generates torque; link.

Invention effect

According to the present invention, in the filter device, water flowing through the drain path of the washing machine is taken into the capture chamber in the cylindrical part of the filter from the inlet, flows out of the cylindrical part through the filter hole, and is discharged to the outside of the washing machine. , wherein the filter holes are distributed on the inner peripheral surface that defines the capture chamber in the cylindrical portion. When the water taken into the capture chamber flows out of the cylindrical portion through the filter hole, foreign matter contained in the water is captured on the inner peripheral surface of the cylindrical portion. In the filter device, the storage chamber arranged outside the cylindrical part is in a state of communicating with the capture chamber through the communication port provided in the cylindrical part. Therefore, when the rotating body rotates, the scraping member rotates together with the rotating body, and from the The inner peripheral surface of the cylinder scrapes foreign matter and pushes the foreign matter into the storage chamber from the communication port. That is, the foreign matter captured on the inner peripheral surface of the cylindrical portion is transferred to the storage chamber without remaining in the capture chamber, so that the increase in the amount of foreign matter in the capture chamber constituting the passage of water in the drainage channel can be suppressed. . Thereby, it can suppress that the inner peripheral surface part of a cylindrical part becomes clogged rapidly and the flow of water in a drain path deteriorates. Therefore, clogging of the filter can be suppressed to ensure smooth flow of water in the drainage channel.

Furthermore, according to the present invention, the scraping member is urged toward the advancing position side near the inner peripheral surface portion of the cylindrical portion by the urging member. Therefore, even if there is a slight error in the relative position between the scraping member and the inner peripheral surface of the cylindrical portion, the scraping member can effectively scrape foreign matter from the inner peripheral surface of the cylindrical portion and push the foreign matter into the storage chamber from the communication port. .

Furthermore, according to the present invention, the scraping member in front of the pushing member passing through the communication port is pushed in by the pushing member toward the retracted position side away from the inner peripheral surface portion of the cylindrical portion. This prevents the scraper member from getting caught on the edge of the communication port, so that the scraper member can be rotated smoothly.

In addition, according to the present invention, the water in the capture chamber flows into the storage chamber from the other communication port in the cylindrical portion that connects the capture chamber and the storage chamber, thereby pushing the foreign matter in the storage chamber into the deep part of the storage chamber. place. Thereby, a space for accommodating subsequent foreign objects can be ensured in the storage chamber. And since the net is arrange|positioned at this other communication port, it can suppress that the foreign material in a storage chamber flows backward from this other communication port into a capture chamber.

In addition, according to the present invention, the filter device can be detached in the washing machine in the housing provided with a partial internal space constituting the drainage channel. The rotating body of the device is connected to the drive unit. Thereby, the rotating body can rotate together with the scraping member by receiving the torque of the drive part. Since the central axis of the inner peripheral surface of the cylindrical portion of the filter, that is, the rotational axis of the rotating body, is parallel to the direction in which the filter device is detached from the housing, a torque transmission path from the drive unit to the rotating body can be easily configured.

Description of drawings

Fig. 1 is a schematic longitudinal sectional right view of a washing machine according to one embodiment of the present invention.

Fig. 2 is a perspective view of main parts inside the washing machine.

Fig. 3 is a perspective view of a case constituting part of a drainage channel in the washing machine.

Fig. 4 is a perspective view of a filter device constituting a filter unit of the washing machine.

Fig. 5 is a perspective view of a filter device and peripheral parts in the filter unit.

Fig. 6 is a perspective view of the filter device viewed from a direction different from Fig. 4 .

Fig. 7 is a plan view of a cleaning unit constituting a filter unit.

Fig. 8 is a stepped cross-sectional view of the cleaning unit at line AA of Fig. 7 .

Fig. 9 is a perspective view of a cleaning unit.

Fig. 10 is a perspective view of a scraping member constituting the cleaning unit.

Fig. 11 is a cross-sectional view taken along the line BB in Fig. 7 .

Fig. 12 is a cross-sectional view taken along line CC of Fig. 7 .

Fig. 13 is a left side view of the filter unit.

FIG. 14 is a cross-sectional view taken along the arrow DD of FIG. 13 .

Fig. 15 is a cross-sectional view taken along the line EE of Fig. 14 .

Fig. 16 is a sectional view taken along the line FF of Fig. 14 .

Fig. 17 is a cross-sectional view showing a state in which the cleaning unit has been rotated further than in Fig. 16 .

Fig. 18 is a cross-sectional view showing a state in which the cleaning unit has been rotated further than in Fig. 17 .

Fig. 19 is a cross-sectional view illustrating a state in which the cleaning unit has been rotated further than in Fig. 18 .

Fig. 20 is a cross-sectional view showing a state in which the cleaning unit has been rotated further than in Fig. 19 .

Fig. 21 is a cross-sectional view of the filter unit when cut at a position different from that of Fig. 16 .

Fig. 22 is a cross-sectional view showing a state in which the cleaning unit has been rotated further than in Fig. 21 .

Fig. 23 is a cross-sectional view showing a state in which the cleaning unit has been rotated further than in Fig. 22 .

Fig. 24 is a cross-sectional view showing a state in which the cleaning unit has been rotated further than in Fig. 23 .

Explanation of reference signs

1: washing machine; 5: drainage; 7: washing tub; 20: casing; 20A: internal space; 21: filter device; 31: driving part; 41: filter; 41A: capture chamber; 46: cylinder part; 46A : inner peripheral face; 47F: intake port; 48A: storage chamber; 49B: communication port; 49C: other communication port; 52: net; 52A: filter hole; 61: rotating body; 62: scraping member; 81: application Force member; 84: connecting part; 85: pushing member; K: central axis; L: laundry; P: disassembly direction.

Detailed ways

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. Fig. 1 is a schematic longitudinal sectional right view of a washing machine 1 according to an embodiment of the present invention. The direction perpendicular to the page in FIG. 1 is called the left-right direction X of the washing machine 1, the left-right direction in FIG. 1 is called the front-back direction Y of the washing machine 1, and the up-down direction in FIG. Z. Among the left-right directions X, the rear side of the paper in FIG. 1 is referred to as the left side X1, and the front side of the paper in FIG. 1 is referred to as the right side X2. In the front-rear direction Y, the left side in FIG. 1 is referred to as a front side Y1 , and the right side in FIG. 1 is referred to as a rear side Y2 . In the up-down direction Z, the upper side is referred to as an upper side Z1, and the lower side is referred to as a lower side Z2.

The washing machine 1 includes a vertical automatic washing machine, a drum washing machine, and a double-tub washing machine, but the washing machine 1 will be described below by taking a drum washing machine with a drying function as an example. The washing machine 1 includes: a cabinet 2; an outer cylinder 3 disposed in the cabinet 2; a water supply channel 4 and a drainage channel 5 connected to the outer cylinder 3; and an inner cylinder 6 disposed in the outer cylinder 3 and containing laundry L. The outer tub 3 and the inner tub 6 together constitute a washing tub 7 . The washing machine 1 also includes: a motor 8 for rotating the inner tub 6; a drying unit 9 for drying the laundry L in the inner tub 6; Dust and other foreign matter.

The box body 2 is formed in a box shape. Front wall 2A serving as a front wall of box body 2 is formed with an opening 2B connecting the inside and outside of box body 2 , and a detachment opening 2C disposed on the lower side Z2 than the opening 2B. A door 11 for opening and closing the entrance 2B is provided on the front wall 2A. The role of the detachment port 2C will be described later.

The entirety of the outer tub 3, that is, the washing tub 7 is elastically supported by the housing 2 via a damper (not shown). The outer cylinder 3 has: a cylindrical peripheral wall 3A centered on an axis J extending in the horizontal direction H to the front-rear direction Y; a disk-shaped rear wall 3B that blocks the hollow portion of the peripheral wall 3A from the rear side Y2; And the annular front wall 3C is connected to the front edge of the peripheral wall 3A. A through-hole 3D penetrating the rear wall 3B in the front-rear direction Y along the axis J is formed at the center of the rear wall 3B. The front wall 3C has: an annular first portion 3E protruding from the front end edge of the peripheral wall 3A toward the axis J side; a cylindrical second portion 3F protruding from the inner peripheral edge of the first portion 3E to the front side Y1; And the annular third portion 3G protrudes toward the axis J side from the front end edge of the second portion 3F. An inlet/outlet 3H communicating with the hollow portion of the peripheral wall 3A from the front side Y1 is formed inside the third portion 3G. The entrance and exit 3H face and communicate with the entrance and exit 2B of the housing 2 from the rear side Y2.

The water supply channel 4 has one end (not shown) connected to a faucet (not shown) and the other end 4A connected to the back wall 3B of the outer cylinder 3 . During water supply, water from a faucet is supplied into the outer cylinder 3 from the water supply channel 4 . Water such as tap water and detergent water in which detergent is dissolved in tap water is stored in the outer cylinder 3 . A water supply valve 12 that opens and closes to start or stop water supply is provided in the middle of the water supply path 4 .

The drain passage 5 is connected to a drain port 3I provided at the lower end of the outer cylinder 3 , for example, at the lower end of the first portion 3E of the front wall 3C. The water in the outer cylinder 3 is discharged from the drainage channel 5 to the outside of the machine, that is, outside the casing 2 . A drain valve 13 that opens and closes to start or stop draining water is provided in the middle of the drain path 5 .

The inner cylinder 6 is one circle smaller than the outer cylinder 3 . The inner cylinder 6 has: a cylindrical peripheral wall 6A arranged coaxially with the peripheral wall 3A of the outer cylinder 3; a disk-shaped back wall 6B that blocks the hollow portion of the peripheral wall 6A from the rear side Y2; The annular wall 6C protrudes toward the axis J side from the front end edge of the peripheral wall 6A. A plurality of through-holes 6D are formed in at least the peripheral wall 6A of the inner cylinder 6 , and water in the outer cylinder 3 passes between the outer cylinder 3 and the inner cylinder 6 through the through-holes 6D. Therefore, the water level in the outer cylinder 3 coincides with the water level in the inner cylinder 6 . A support shaft 14 extending along the axis J toward the rear side Y2 is provided at the center of the rear wall 6B of the inner cylinder 6 . The rear end portion of the support shaft 14 passes through the through-hole 3D of the rear wall 3B of the outer cylinder 3 and is arranged on the rear side Y2 of the rear wall 3B.

An inlet/outlet 6E communicating with the hollow portion of the peripheral wall 6A from the front side Y1 is formed inside the annular wall 6C. The port 6E faces and communicates with the port 3H of the outer cylinder 3 and the port 2B of the case 2 from the rear side Y2. The entrance 3H and the entrance 6E are opened and closed by the door 11 together with the entrance 2B. The user of the washing machine 1 takes out and puts the laundry L into the inner tub 6 through the opened inlet and outlet 2B, the inlet and outlet 3H, and the inlet and outlet 6E.

In the housing 2 , the motor 8 is disposed on the rear side Y2 of the rear wall 3B of the outer cylinder 3 . The motor 8 is connected to a support shaft 14 provided on the inner cylinder 6 . The driving force generated by the motor 8 is transmitted to the support shaft 14 , and the inner tube 6 rotates around the axis J along with the support shaft 14 . It should be noted that a clutch mechanism (not shown) that transmits the driving force of the motor 8 to the supporting shaft 14 or cuts off the driving force may be provided between the motor 8 and the supporting shaft 14 .

The drying unit 9 includes: a circulation path 15 and an air supply unit 16 for circulating the air in the washing tub 7; and a heating unit 17 for heating the circulated air. The circulation path 15 is a flow path arranged, for example, on the upper side Z1 of the outer cylinder 3 within the casing 2 . A take-out port 15A is formed at one end of the circulation path 15 , and a return port 15B is formed at the other end of the circulation path 15 . The extraction port 15A is connected to the back wall 3B of the outer cylinder 3 and communicates with the inside of the outer cylinder 3 from the rear side Y2. The return port 15B is connected to the upper end portion of the second portion 3F of the front wall 3C of the outer cylinder 3, and communicates with the inside of the outer cylinder 3 from the upper side Z1.

Air blower 16 is a so-called blower, and includes blades 18 arranged in circulation path 15 and a motor (not shown) that rotates blades 18 . When the blade 18 rotates, as shown by the thick dotted arrow, the air in the washing tub 7, that is, the air in the outer tub 3 and the inner tub 6, is taken out from the outlet 15A into the circulation path 15, and returns from the return port 15B. In the washing tub 7. Thereby, the air in washing tub 7 circulates so as to flow through washing tub 7 and circulation path 15 sequentially.

The heating unit 17 is a heat exchanger in a heat pump or a general heater, and is at least partially provided in the circulation path 15 . The part of the heating part 17 provided in the circulation path 15 has a plurality of fin-shaped heat dissipation parts 17A, for example. When the heating part 17 is in operation, the heat dissipation part 17A will become high temperature, so the air flowing through the circulation path 15 will be heated and become hot air when passing around the heat dissipation part 17A.

The washing machine 1 includes a control section 19 configured as a microcomputer. The control unit 19 executes the washing operation by controlling the operations of the motor 8 , the water supply valve 12 , the drain valve 13 , the blower unit 16 , the heating unit 17 , and the like. The washing operation includes a washing process, a rinsing process, a dehydration process, and a drying process.

Before the cleaning process starts, detergent is put into the inner cylinder 6 . During washing, the controller 19 opens the water supply valve 12 for a predetermined time to supply water to the washing tub 7 while the drain valve 13 is closed, and then the motor 8 rotates the inner tub 6 . Thereby, the laundry L in the inner tub 6 is dropped and washed. In the tumble washing, "tumbling" (tumbling) in which the laundry L naturally falls to the water surface after being lifted up to a certain extent is repeated. Stains are removed from the laundry L by the impact of the tumbling and the detergent components contained in the water stored in the inner tub 6 . When the controller 19 opens the drain valve 13 to drain the washing tub 7 after a predetermined time elapses from the start of tumbling, the washing process ends.

During rinsing, the controller 19 opens the water supply valve 12 for a predetermined time to supply water to the washing tub 7 while the drain valve 13 is closed, and then the motor 8 rotates the inner tub 6 . Then, the above-mentioned tumbling is repeated, so that the laundry L is rinsed with the tap water in the inner tub 6 . When the controller 19 executes draining of the washing tub 7 after a predetermined time elapses from the start of tumbling, the rinsing process ends. It is also possible to repeat the rinsing process several times. During the dehydration process, the control unit 19 rotates the inner cylinder 6 for dehydration while the drain valve 13 is opened. The laundry L in the inner tub 6 is dehydrated by the centrifugal force generated by the dehydration rotation of the inner tub 6 . The water seeped out of the laundry L by dehydration is drained out of the machine through the drainage channel 5 . It is also possible that the dehydration process is carried out not only after the rinsing process but also after the washing process.

During the drying process, the control unit 19 generates hot air through the blower 16 and the heating unit 17 and circulates the hot air between the inner tub 6 and the circulation path 15 to supply the hot air to the laundry L in the inner tub 6 . Thus, the laundry L is dried. It should be noted that the washing machine 1 may also be a washing machine without the drying unit 9, and in the washing operation in this case, the drying process is omitted.

FIG. 2 is a perspective view of main parts inside the washing machine 1 . FIG. 2 illustrates a part of the drainage channel 5 , the drainage valve 13 and the filter unit 10 . The drain valve 13 includes: a valve body 13A arranged in the drain passage 5 to actually open and close the drain passage 5 ; and a torque motor 13B as an example of a driver for operating the valve body 13A. It should be noted that although in this embodiment, natural drainage is adopted to discharge the water in the washing tub 7 to the outside of the machine by opening the drain valve 13 by its own weight, a pump (not shown) may also be used instead of the drain valve. 13 and utilize the pump to forcibly discharge the forced drainage of the water in the washing tub 7. In the case of forced drainage, the drainage path 5 may be arranged to extend from the washing tub 7 to the upper side Z1.

In the cabinet 2 of the washing machine 1, the filter unit 10 is arranged at the lower side Z2 than the washing tub 7, and is adjacent to the detachment opening 2C of the front wall 2A of the cabinet 2 from the rear side Y2 (see FIG. 1 ). The filter unit 10 includes: a hollow casing 20 provided in the middle of the drainage channel 5 in an area closer to the drain port 3I than the valve body 13A; The internal space 20A of the housing 20 constitutes a part of the drainage channel 5 . Hereinafter, a region of the drainage passage 5 closer to the outlet 3I than the internal space 20A is referred to as an upstream region 5A, and a region of the drainage passage 5 farther from the drainage outlet 3I than the inner space 20A is referred to as a downstream region 5B. The upstream region 5A extends from the drain port 3I to the lower side Z2, and is connected to the casing 20 from the left side X1. The downstream area 5B extends from the housing 20 toward the rear side Y2. Each of the upstream region 5A and the downstream region 5B may be bent halfway.

Hereinafter, the housing 20 and the filter device 21 will be described in detail respectively. In the following description, the respective orientations of the housing 20 and the filter device 21 are determined using the above-mentioned left-right direction X, front-rear direction Y, and up-down direction Z. In addition, each member which comprises the housing|casing 20 and the filter device 21 is made of resin in many cases.

FIG. 3 is a perspective view of the casing 20 . The overall shape of the casing 20 is a cylindrical shape long in the front-rear direction Y. The casing 20 integrally has: a cylindrical peripheral wall 25 constituting most of the casing 20; a circular tube-shaped inflow portion 26 protruding from, for example, the front end portion of the left outer peripheral surface of the peripheral wall 25 to the left side X1; And the circular tube-shaped outflow part 27 protrudes toward the rear side Y2 from, for example, the rear end part of the lower outer peripheral surface of the peripheral wall 25 .

The peripheral wall 25 has a cylindrical inner peripheral surface 25A. The substantially cylindrical space surrounded by the inner peripheral surface 25A is the internal space 20A of the casing 20 . A circular inlet and outlet 20B formed by surrounding the front end of the peripheral wall 25 is formed in the housing 20 . The doorway 20B opens the internal space 20A to the front side Y1. An annular stepped portion 25B is provided at a portion adjacent to the entrance/exit 20B in the front end portion of the inner peripheral surface 25A. Accordingly, in the inner peripheral surface 25A, the diameter of the front end region on the front side Y1 of the step portion 25B is larger than the rear region on the rear side Y2 of the step portion 25B.

The front end region of the inner peripheral surface 25A is provided with a locking claw 25C extending in the circumferential direction thereof. A plurality of locking claws 52C may be provided, and in this case, the plurality of locking claws 25C are arranged in a row in the circumferential direction of the inner peripheral surface 25A. A raised portion 25D raised to the right side X2 is provided at a position adjacent to the inflow portion 26 in the rear region of the inner peripheral surface 25A. The right side surface 25E of the raised portion 25D is a flat surface extending up and down, front and back, and is exposed to the internal space 20A.

The inner space of the inflow part 26 is open from the left end of the inflow part 26 to the left side X1 as a cylindrical inflow port 26A, and communicates with the front end of the inner space 20A from the right side 25E of the raised part 25D. The upstream region 5A of the drainage channel 5 communicates with the internal space 20A via the inlet 26A by being connected to the inlet 26 . The inner space of the outflow part 27 is opened from the rear end of the outflow part 27 to the rear side Y2 in the form of a cylindrical outflow port 27A, and communicates with the rear end part of the inner space 20A from the lower side Z2 (see FIG. 15 ). The downstream region 5B of the drain passage 5 communicates with the internal space 20A via the outflow port 27A by being connected to the outflow portion 27 .

The casing 20 also integrally has: a flange 28 protruding in the circumferential direction from the front end of the peripheral wall 25; Interior space 20A. A plurality of insertion holes 28A penetrating the flange 28 in the front-rear direction Y are formed in the flange 28 . The flange 28 is arranged to face the front wall 2A from the rear side Y2 so as to surround the attachment/detachment opening 2C of the front wall 2A of the housing 2 (see FIG. 1 ). The flange 28 is fixed to the front wall 2A by a fastening member (not shown) such as a bolt inserted through the insertion hole 28A. The entrance and exit 20B of the casing 20 are opposed to the detachment opening 2C from the rear side Y2. A cover 30 for opening and closing the attachment/detachment port 2C may be provided on the front wall 2A (see FIG. 1 ).

The filter unit 10 further includes a drive unit 31 disposed on the rear side Y2 of the rear wall 29 . An example of the drive unit 31 is a motor that generates torque by receiving electric power from the washing machine 1 and is fixed to the casing 20 via the bracket 32 . At the rear end portion of the outer peripheral surface of the peripheral wall 25 of the housing 20, a mounting portion 25F to which the bracket 32 is mounted via a fastening member 33 (see FIG. 5 ) such as a bolt is provided.

The drive unit 31 has an output shaft 34 extending to the front side Y1 and coaxial with the rear wall 29 . The front end portion of the output shaft 34 is arranged at the rear end portion of the internal space 20A of the housing 20 . A disk-shaped drive joint 35 is coaxially attached to the front end portion of the output shaft 34 . When the drive unit 31 operates, the output shaft 34 and the drive joint 35 rotate integrally.

FIG. 4 is a perspective view of the filter device 21 . The filter device 21 includes an operation part 40 and a filter 41 connected to the operation part 40 from the rear side Y2.

The operation unit 40 has a disk-shaped sealing member 42 having a central axis extending in the front-rear direction Y, and a handle 43 disposed on the front side Y1 of the sealing member 42 . The sealing member 42 has a thin disk shape in the front-rear direction Y, and is provided on its rear surface with an annular gasket 42A that wraps the outer edge of the rear surface.

The handle 43 has a disk portion 43A arranged coaxially with the sealing member 42 , and a knob portion 43B protruding from the front surface of the disk portion 43A to the front side Y1. A lock groove 43C extending in the circumferential direction is formed on the outer peripheral surface of the disc portion 43A. The outer diameter of the sealing member 42 is almost the same as that of the disc portion 43A. There may be a plurality of locking grooves 43C, and in this case, the locking grooves 43C are arranged in a row in the circumferential direction of the disc portion 43A.

The handle 43 is relatively rotatable with respect to the sealing member 42 around the central axis of the sealing member 42 . The convex portion 42B provided at the front end portion of the outer peripheral surface of the sealing member 42 is in a state of being fitted in the fitting groove 43D on the rear side Y2 of the locking groove 43C in the outer peripheral surface of the disc portion 43A. The area extends in the circumferential direction (see FIG. 5 ). The knob 43 is relatively rotatable with respect to the sealing member 42 within a range in which the convex portion 42B can move in the fitting groove 43D in the circumferential direction of the disc portion 43A. Thereby, rotation of the handle 43 more than necessary is restricted.

The filter 41 has an overall rectangular parallelepiped shape long in the front-rear direction Y, is smaller than the sealing member 42 in a front view, and is arranged to fit inside the outer peripheral edge of the sealing member 42 . The filter 41 has a filter main body 44 constituting most of the filter 41 , and a cover 45 attached to the filter main body 44 .

The filter main body 44 has: a cylindrical portion 46 that is long in the front-rear direction Y; an intake portion 47 that protrudes from the front end portion of the cylindrical portion 46 to the left side X1; The part near the rear side Y2.

The cylindrical portion 46 integrally has a circumferential wall 49 extending in the front-rear direction Y; a disc-shaped front wall 50 connected to the front end of the circumferential wall 49 ; and a disc-shaped rear wall 51 connected to the rear end of the circumferential wall 49 . The peripheral wall 49 has a cylindrical overall shape, and its inner peripheral surface is also cylindrical. The inner peripheral surface of the peripheral wall 49 is the inner peripheral surface 46A of the cylindrical portion 46 (see FIG. 16 ). The cylindrical space surrounded by the inner peripheral surface 46A is a capture chamber 41A defined in the cylindrical portion 46 by the inner peripheral surface 46A in the filter 41 .

The central axis K of the inner peripheral surface portion 46A extends in the front-rear direction Y. Hereinafter, the radial direction based on the central axis K is referred to as the radial direction R, and the circumferential direction around the central axis K is referred to as the circumferential direction S. Among the radial directions R, the direction closer to the central axis K is called radially inner R1, and the direction farther away from the central axis K is called radially outer R2. Although in the present embodiment, the central axis K does not coincide with the central axis (not shown) of the seal member 42 of the operation portion 40, these two axes may coincide.

The front wall 50 closes the capture chamber 41A from the front side Y1, and the rear wall 51 closes the capture chamber 41A from the front side Y1. The front surface of the front wall 50 is fixed to the sealing member 42 of the operation part 40 . The sealing member 42 and the front wall 50 may be integrated, and in this case, the sealing member 42 may be regarded as a part of the filter 41 . A plurality of through-holes 49A are formed in substantially the right half of the peripheral wall 49 . As an example, a row formed by five through-holes 49A arranged at equal intervals in the front-rear direction Y is arranged in a plurality of rows at equal intervals in the circumferential direction S. As shown in FIG. Each through-hole 49A is formed in a rectangle with rounded corners.

A net 52 such as a mesh sheet is provided in each through hole 49A. In each of the through holes 49A, the net 52 closes the through holes 49A to constitute an inner peripheral surface portion 46A of the cylindrical portion 46 (see FIG. 16 ). Each net 52 is preferably arranged so as to bend in the circumferential direction S. Each net 52 is formed with filter holes 52A which are innumerable fine through holes constituting a mesh. Therefore, a plurality of filter holes 52A are distributed on the inner peripheral surface portion 46A of the cylindrical portion 46 . In addition, instead of the net 52, you may provide the grid (not shown) integrally formed in the cylindrical part 46, and in this case, the gap|interval in a grid functions as 52 A of filter holes. The size of the filter hole 52A can be set arbitrarily, but is set to about 100 μm when microplastics are captured, and is set to about 500 μm when microplastics are not captured.

FIG. 5 is a perspective view of the filter device 21 and its peripheral parts. A communication port 49B penetrating through the peripheral wall 49 in the radial direction R and another communication port 49C are provided in a substantially left half of the peripheral wall 49 in a region on the rear side Y2 from the front end. The communicating port 49B has a rectangular shape that is long in the front-rear direction Y. The communication port 49C is disposed on the lower side Z2 than the communication port 49B. As an example, four communication ports 49C are arranged in a row at equal intervals in the front-rear direction Y. Each communication port 49C is formed in a rectangle with rounded corners. The net 52 mentioned above is also provided in each communication port 49C. In each communication port 49C, the net 52 is arranged so as to close the communication port 49C and constitute the inner peripheral surface portion 46A of the cylindrical portion 46 (see FIG. 21 ).

The filter 41 has the opening and closing member 53 which opens and closes the communicating port 49B. The opening and closing member 53 has a plate shape that is long in the front-rear direction Y and is curved in the circumferential direction S, and has a size that blocks the communication port 49B. The upper end part of the opening and closing member 53 is attached to the filter main body 44 via the rotation shaft 54 (refer FIG. 21) extended in the front-back direction Y.

The opening and closing member 53 is rotatable about the rotation shaft 54 between an open position shown in FIG. 5 and a closed position (see FIG. 16 etc.). The filter main body 44 includes the urging member 55 (refer FIG. 21 ) which always urges the opening-closing member 53 to a closed position. An example of the urging member 55 is a coil spring wound around the rotation shaft 54 .

When the opening and closing member 53 is located at the open position, the lower end edge of the opening and closing member 53 is away from the lower end edge 49D of the communication port 49B radially outward R2, so that the communication port 49B is opened. When the opening and closing member 53 is at the closed position, the lower end edge of the opening and closing member 53 contacts the lower end edge 49D of the communication port 49B from the radially outer side R2, and the opening and closing member 53 blocks the entire communication port 49B. A portion of the opening and closing member 53 that faces the inside of the peripheral wall 49 , that is, the capture chamber 41A when the communication port 49B is closed is referred to as an inner surface portion 53A (see FIG. 16 ). When the opening and closing member 53 is located at the closed position, the inner surface portion 53A constitutes a part of the inner peripheral surface portion 46A of the cylindrical portion 46 . Semicircular protrusions 53B protruding radially inward R1 are provided at both ends of the inner surface portion 53A in the front-rear direction Y. These protrusions 53B are arranged in the capture chamber 41A when the opening and closing member 53 is in the closed position.

The intake portion 47 has a substantially cubic shape protruding from the front end portion of the substantially left half of the peripheral wall 49 toward the left side X1. In the intake portion 47, the left surface 47A is flat along an imaginary plane including the vertical direction Z and the front-rear direction Y, the upper surface 47B and the lower surface 47C are flat along an imaginary plane including the front-rear direction Y and the left-right direction X, and the rear surface 47D Both the front surface 47E and the front surface 47E are flat along a virtual plane including the up-down direction Z and the left-right direction X.

The front surface 47E also serves as the front surface of the front wall 50 (see FIG. 4 ) of the cylindrical portion 46 . A circular inlet 47F and an annular gasket 56 surrounding the inlet 47F are provided on the left surface 47A. The intake port 47F extends to the right side X2 in the intake portion 47 , passes through the front end portion of the substantially left half of the peripheral wall 49 , and communicates with the front end portion of the capture chamber 41A. The washer 56 is thinner in the left-right direction X, and may be formed integrally with the intake portion 47 or may be attached to the intake portion 47 as another component.

The frame portion 48 has a rectangular frame shape that is long upward in the front-rear direction Y and is arranged in the downward direction Z and the front-rear direction Y, and is attached to approximately the left half of the peripheral wall 49 in a state surrounding the communication port 49B and all the communication ports 49C. A region on the rear side Y2 than the intake portion 47 in the center. The space surrounded by the frame portion 48 is referred to as a storage chamber 48A. The storage chamber 48A is arranged outside the cylindrical portion 46 . The capture chamber 41A and the storage chamber 48A in the cylindrical portion 46 are in a state of communicating via the communication port 49B and the communication port 49C. A claw-shaped engaging portion 48B is provided at a lower end portion of the frame portion 48 .

The cover 45 has a rectangular plate shape having almost the same size as the frame portion 48 . One of the pair of long side portions of the rectangular cover 45 is connected to the upper end portion of the frame portion 48 via a rotation shaft 57 extending in the front-back direction Y. As shown in FIG. The cover 45 is rotatable about a rotation shaft 57 between an open position shown in FIG. 5 and a closed position (see FIG. 6 etc.). When the cover 45 is located at the open position, the cover 45 is separated from the frame portion 48, whereby the storage chamber 48A is opened.

Fig. 6 is a perspective view of the filter device 21 when the cover 45 is in the closed position. When the lid 45 is in the closed position, the lid 45 contacts the frame portion 48 and blocks the storage chamber 48A from the left side X1, thereby closing the storage chamber 48A. A recess 45A constituting a part of the storage chamber 48A may be provided on the inner surface portion of the cover 45 facing the storage chamber 48A in the closed position (see FIG. 5 ). On the other long side portion of the cover 45 on the side opposite to the rotation shaft 57 side, an engaging portion 45B protruding in, for example, a U-shape is provided. When the engaging portion 45B engages with the engaging portion 48B of the frame portion 48 , the cover 45 is locked in the closed position. When the cover 45 is in the closed position, the left surface 45C of the cover 45 is substantially flush with the left surface 47A of the intake portion 47 .

The filter device 21 includes a cleaning unit 60 arranged in the cylindrical portion 46 , that is, in the capture chamber 41A of the filter 41 . FIG. 7 is a top view of the cleaning unit 60 . The cleaning unit 60 includes a rotating body 61 and a scraping member 62 supported by the rotating body 61 .

The rotating body 61 has a rectangular parallelepiped shape long in the front-rear direction Y. The rotating body 61 integrally has: a pair of side plates 63 extending in parallel in the front-rear direction Y; a front plate 64 erected between the front ends of the pair of side plates 63; a rear plate 65 erected at the rear ends of the pair of side plates 63 and a partition plate 66 disposed between a pair of side plates 63 and erected between the front plate 64 and the rear plate 65 . The pair of side plates 63 and the partition plate 66 have a rectangular plate shape long in the front-rear direction Y. The front plate 64 and the rear plate 65 have a rectangular plate shape having a plate thickness direction aligned with the front-rear direction Y. A front rotation shaft 67 protruding to the front side Y1 is provided at a position coincident with the center axis K on the front surface of the front plate 64 . A rear rotation shaft 68 protruding toward the rear side Y2 is provided at a position coincident with the central axis K on the rear surface of the rear plate 65 .

The space surrounded by the pair of side plates 63, the front plate 64 and the rear plate 65 is the inner space of the rotating body 61, and the inner space of the rotating body 61 is divided into two storage chambers 61A by the partition plate 66. The two storage chambers 61A are arranged so as to be long in the front-rear direction Y, sandwich the partition plate 66 , and be point-symmetrical to each other with respect to the central axis K. As shown in FIG.

FIG. 8 is a stepped cross-sectional view of the cleaning unit 60 at the line AA of FIG. 7 . A bottom plate 69 extending in the front-rear direction Y is provided in each storage chamber 61A. The bottom plate 69 is arranged at a position biased towards one of the pair of long sides of the rectangular partition plate 66 , and is spanned between the partition plate 66 and one side plate 63 , and is also spanned between the front plate 64 and the rear plate 65 . between. A portion of the storage chamber 61A that coincides with the other long side of the partition plate 66 is the opening 61B. The opening 61B has a long rectangular shape in the front-back direction Y, and opens the entire area of the storage chamber 61A in the front-back direction Y.

Cylindrical protrusions 69A protruding toward the opening 61B are provided at both ends of the bottom plate 69 in the front-rear direction Y, respectively. A single or a plurality of guide cylinder portions 69B protruding toward the side opposite to the opening 61B are provided in a region of the bottom plate 69 surrounded by the convex portions 69A at both ends. In this embodiment, the three guide cylinder parts 69B are arranged so that they may be lined up at equal intervals in the front-back direction Y.

FIG. 9 is a perspective view of the cleaning unit 60 . Each guide tube portion 69B has a square tube shape, and a part thereof is constituted by the side plate 63 and the partition plate 66 . At the end farthest from the bottom plate 69 in each guide tube portion 69B, a U-shaped notch 69C is formed by notching the side plate 63 and the partition plate 66 , respectively. A water discharge hole 69D (see FIG. 8 ) penetrating through the bottom plate 69 is provided at a position avoiding the convex portion 69A and the guide cylinder portion 69B in the bottom plate 69 .

As described above, the two storage chambers 61A are arranged point-symmetrically with respect to the central axis K. Accordingly, the openings 61B of the two storage chambers 61A are not adjacent to each other, and the opening 61B of one storage chamber 61A and the guide tube portion 69B of the other storage chamber 61A are adjacently arranged with the partition plate 66 interposed therebetween. Another notch 63A is provided at a position avoiding the notch 69C in the front-rear direction Y in a pair of long side portions of each side plate 63 .

FIG. 10 is a perspective view of the scraping member 62 . Based on the posture of the scraping member 62 in FIG. 10 , the scraping member 62 has a rail portion 75 , a brush 76 , and a positioning portion 77 . The rail portion 75 extends in the front-rear direction Y and is formed in a rectangular column shape. In FIG. 10 , a brush 76 is embedded in a tip surface 75A constituting the upper surface of the rail portion 75 . The positioning portion 77 is formed as a pair of front and rear, respectively extending from the front end and the rear end of the rail portion 75 to the lower side Z2, that is, the side opposite to the front end surface 75A. The scraper member 62 further has: guide protrusions 78 extending from the lower surface of the rail portion 75 to the lower side Z2 between the front and rear positioning portions 77; and convex portions 79 provided adjacent to the positioning portions 77 one by one , protruding from the lower surface of the rail portion 75 to the lower side Z2.

In the brush 76 , bundles 76A of hairs of a predetermined number are arranged at substantially equal intervals in the front-rear direction Y, and the brush 76 is constituted by these bundles 76A. Instead of the bundle 76A of bristles, the brush 76 may be formed, for example, by elastically deformable protrusions. Alternatively, instead of the brush 76, a wiper long in the front-rear direction Y may be used. A convex portion 80 protruding in a semicircular shape is provided at a position avoiding the beam 76A on the front end surface 75A of the guide rail portion 75 . In the present embodiment, one convex portion 80 is provided at each of the front position and the rear end portion of the guide rail portion 75 . The protrusion amount of the convex portion 80 from the front end surface 75A is smaller than the protrusion amount of the brush 76 .

The number of guide protrusions 78 is the same as that of the guide cylinder portion 69B, and three are provided in this embodiment, and they are arranged at equal intervals along the front-rear direction Y. The lower portion of each guide protrusion 78 in FIG. 10 , that is, the portion on the opposite side to the guide rail portion 75 is bifurcated, and claws 78A protruding so as to be separated from each other are provided at the tip ends of the pair of branched portions.

Two such scraper members 62 are provided corresponding to the two storage chambers 61A in the rotating body 61 , and these two scraper members 62 are accommodated in each storage chamber 61A from the opening 61B one by one (see FIG. 9 ). At this time, in each scraping member 62, the positioning portion 77 on the front side Y1 faces the front plate 64 of the rotating body 61 from the rear side Y2, and the positioning portion 77 on the rear side Y2 faces the rear plate 64 of the rotating body 61 from the front side Y1. 65 opposite (see Figure 8). Therefore, each scraper member 62 is positioned in the front-rear direction Y with respect to the rotating body 61 .

Fig. 11 is a cross-sectional view taken along the line BB in Fig. 7 . In each scraper member 62 , the brush 76 is exposed from the opening 61B, and the convex portion 79 faces the convex portion 69A located at the same position as the convex portion 79 in the front-rear direction Y in the storage chamber 61A. The convex part 69A and the convex part 79 which oppose each other are connected by the urging member 81 which consists of a coil spring, for example. The urging member 81 is in a compressed state between the convex portion 69A and the convex portion 79 , and always urges the convex portion 79 , that is, the scraping member 62 so that the brush 76 is exposed from the opening 61B of the housing chamber 61A. The protrusions 80 of the scraping member 62 are exposed from the notches 63A of the corresponding side plates 63 .

Fig. 12 is a cross-sectional view taken along line CC of Fig. 7 . It should be noted that Fig. 11 and Fig. 12 do not show the state of the scraping member 62 at the same timing. In each scraping member 62, each guide protrusion 78 is inserted into the guide cylinder portion 69B located at the same position in the front-rear direction Y in the storage chamber 61A, and in each guide protrusion 78, a pair of claws 78A are provided with play. It is accommodated in the corresponding notch 69C in the guide tube portion 69B in such a way. The scraping member 62 is slidable in a direction in which the guide protrusion 78 extends, which direction is referred to as a sliding direction T hereinafter. In FIG. 12 , the sliding direction T coincides with the vertical direction Z, but the sliding direction T may not coincide with the vertical direction Z as the cleaning unit 60 rotates.

As described above, each scraping member 62 is biased by the biasing member 81 so as to be exposed from the opening 61B. However, when the pawl 78A of each guide protrusion 78 in the scraping member 62 is caught on the deepest edge 69E of the notch 69C of the guide cylinder portion 69B as shown in FIG. 12 , the scraping member 62 cannot be further exposed from the opening 61B.

FIG. 13 is a left side view of the filter unit 10 . FIG. 14 is a cross-sectional view taken along the arrow DD of FIG. 13 . As described above, the cleaning unit 60 is arranged in the capture chamber 41A of the filter 41, and the front rotation shaft 67 and the rear rotation shaft 68 of the rotating body 61 in the cleaning unit 60 are arranged coaxially with the central axis K of the capture chamber 41A. The front rotating shaft 67 is rotatably supported by the front wall 50 of the cylindrical portion 46 of the filter 41 , and the rear rotating shaft 68 is rotatably supported by the rear wall 51 of the cylindrical portion 46 . Thus, the entire cleaning unit 60 can rotate around the central axis K within the capture chamber 41A. That is, in the cleaning unit 60 , the rotating body 61 can rotate around the central axis K, and the scraping member 62 can rotate together with the rotating body 61 .

The rear end portion of the rear rotation shaft 68 penetrates the rear wall 51 in the front-rear direction Y. The filter 41 includes a disk-shaped driven joint 82 coaxially fitted to the rear end portion of the rear rotary shaft 68 . The driven joint 82 is arranged on the rear side Y2 of the rear wall 51 , and is attached to the rear end portion of the rear rotation shaft 68 via a fastening member 83 such as a bolt.

When the filter device 21 is attached to the housing 20, the user grasps the handle 43B of the handle 43 of the operation part 40 to move the filter device 21 to the rear side Y2, and removes the filter device 21 from the case. The detachment opening 2C (see FIG. 1 ) of the front wall 2A of the front wall 2 and the inlet and outlet 20B of the casing 20 are inserted into the internal space 20A of the casing 20 . At this time, in the filter device 21, the driven joint 82 first enters the internal space 20A.

When the gasket 42A in the sealing member 42 of the operation part 40 contacts the stepped portion 25B around the inlet and outlet 20B of the casing 20 from the front side Y1, the insertion of the filter device 21 stops, and the entire filter 41 is arranged in the inner space 20A, that is, in the washing machine 1. Inside the drain 5. At this time, in the internal space 20A, the gasket 56 of the filter 41 is in contact with the right side surface 25E of the raised portion 25D of the case 20 , and the inlet 26A of the case 20 communicates with the intake port 47F of the filter 41 .

In addition, the driven joint 82 on the rotating body 61 side in the filter 41 is connected to the driving joint 35 on the driving unit 31 side in the housing 20 . That is, the drive joint 35 and the driven joint 82 constitute a connection portion 84 that connects the rotating body 61 and the drive portion 31 in accordance with attachment of the filter device 21 to the housing 20 . In the state where the driven joint 82 is connected to the drive joint 35, torque can be transmitted from the driving part 31 to the rotating body 61, so the rotating body 61 can rotate together with the scraping member 62 by receiving the torque from the driving part 31. .

It should be noted that known joints can be used for the driving joint 35 and the driven joint 82 . As described above, the filter 41 is positioned in the internal space 20A of the housing 20 by the washer 42A in contact with the stepped portion 25B, the washer 56 in contact with the raised portion 25D, and the driving joint 35 and the driven joint 82 connected.

And, when the user twists the handle 43 to engage the locking claw 25C of the housing 20 with the locking groove 43C of the handle 43 (see FIG. 15 ), the attachment of the filter device 21 is completed, so the filter 41 is accommodated in the internal space. The state of 20A is maintained. The user can detach the filter device 21 from the housing 20 in the reverse order of the attachment.

Specifically, the user removes the driven joint 82 from the drive joint 35 by pulling the handle 43 to the front side Y1 after detaching the lock pawl 25C from the lock groove 43CA by reversely twisting the handle 43 and removing the filter 41 is pulled out from the internal space 20A, and the detachment of the filter device 21 is completed at this time.

As described above, the detachment direction P of the filter device 21 to the casing 20 is the front-rear direction Y. Therefore, the detachment direction P is parallel to the central axis K which is the respective rotation axes of the rotating body 61 , the driving joint 35 , and the driven joint 82 . In this case, the torque transmission path from the drive part 31 to the rotating body 61, and the detachable structure of the filter device 21 can be comprised easily.

When the controller 19 opens the drain valve 13 as described above, the water flowing from the washing tub 7 through the upstream area 5A of the drain path 5 flows into the inlet 26A of the housing 20 and then is taken from the intake port 47F of the filter 41. into the cylindrical portion 46, that is, into the capture chamber 41A of the filter 41 (see arrow Q1 in FIG. 14 ). The inlet and outlet 20B of the case 20 are water-sealed by the gasket 42A, and the space between the inflow port 26A and the inlet 47F is water-sealed by the gasket 56 , thereby preventing water leakage from the case 20 .

The water taken in from the intake port 47F into the capture chamber 41A flows from the filter hole 52A of the inner peripheral surface 46A of the cylindrical portion 46 to the outside of the cylindrical portion 46 , that is, the gap between the cylindrical portion 46 and the casing 20 in the internal space 20A of the casing 20 . 20C outflow. When the water passes through the filter hole 52A, the foreign matter contained in the water is captured and attached to the inner peripheral surface portion 46A. That is, the filter 41 captures foreign substances contained in water flowing out of the cylindrical portion 46 from the filter hole 52A on the inner peripheral surface portion 46A.

Fig. 15 is a cross-sectional view taken along the line EE of Fig. 14 . The water taken into the capture chamber 41A and flowed out of the cylindrical portion 46 through the filter hole 52A flows out from the outlet 27A of the outflow portion 27 in the casing 20 to the downstream area 5B of the drain path 5, and is discharged to the machine of the washing machine 1. outside (refer to arrow Q2 in Figure 15). It should be noted that even if water enters each storage chamber 61A in the rotating body 61 of the cleaning unit 60 disposed in the capture chamber 41A, the water will be discharged to the bottom of the storage chamber 61A through the water discharge hole 69D on the bottom plate 69 of the storage chamber 61A. outside (refer to Figure 8).

Fig. 16 is a sectional view taken along the line FF of Fig. 14 . In the cleaning unit 60, the two scraping members 62 are arranged point-symmetrically with respect to the central axis K. As shown in FIG. Accordingly, the brushes 76 of these scraping members 62 are reversely exposed from the openings 61B of the corresponding housing chambers 61A in the rotating body 61 .

Each scraping member 62 in FIG. 16 is located at an advanced position close to the inner peripheral surface portion 46A of the cylindrical portion 46 . In the scraping member 62 at the advanced position, the brush 76 is in contact with one point on the circumference of the inner peripheral surface portion 46A over substantially the entire area in the front-rear direction Y. Each scraper member 62 can retract to the retracted position (not shown) which is apart from the inner peripheral surface part 46A of the cylindrical part 46 by sliding in the slide direction T. As shown in FIG. In the scraper member 62 located in the retracted position, the brush 76 is separated from the entire area of the inner peripheral surface portion 46A in the radial direction inward R1.

In this way, each scraper member 62 can slide in the sliding direction T between the advanced position and the retracted position. Each scraper member 62 is urged toward the advanced position side by the above-described urging member 81 .

The center axis K which is the rotation center of the cleaning unit 60 is not located on the extension line of each scraper member 62 in the sliding direction T, and the extension line is arranged slightly shifted from the center axis K to the radial direction R. Therefore, the sliding direction T does not coincide with the radial direction R extending from the central axis K when viewed from the front-rear direction Y which is the axial direction of the cleaning unit 60 . In each scraping member 62 in this case, when viewed from the front-rear direction Y, the brush 76 makes contact with the inner peripheral surface 46A with respect to the circumferential direction S at two intersecting angles α and β that are not at right angles. The tangent direction U crosses. The intersection angle α is an acute angle, and the intersection angle β is an obtuse angle.

When the driving part 31 operates so that torque is transmitted to the rotating body 61, the entire cleaning unit 60 rotates. Specifically, the cleaning unit 60 rotates in one direction S1 of the circumferential directions S so that the area forming the intersection angle α is in front of the area forming the intersection angle β, and in this embodiment, rotates counterclockwise in a front view.

Then, in the cleaning unit 60, each scraping member 62 at the advanced position rotates together with the rotating body 61, and the brush 76 in each scraping member 62 slides with respect to the inner peripheral surface portion 46A of the cylindrical portion 46, whereby the brush 76 from the inner peripheral Face 46A scrapes foreign matter. At this time, since the brush 76 obliquely slides relative to the inner peripheral surface 46A so as to swing in the direction opposite to the one direction S1 , the resistance exerted by the brush 76 on the inner peripheral surface 46A can be suppressed to be small.

In this embodiment, as an example, the cleaning unit 60 rotates twice in one second. In this case, since a plurality (specifically, two) of scraping members 62 scrape foreign matter from the inner peripheral surface 46A, the inner peripheral surface 46A can be efficiently cleaned and the rotation balance of the cleaning unit 60 can be improved.

When the brush 76 of the scraping member 62 comes to the communication port 49B of the cylindrical portion 46 with the rotation of the cleaning unit 60, as shown in FIG. 49B. Then, as shown in FIG. 18 , both ends of the brush 76 in the front-rear direction Y press the convex portion 53B of the opening and closing member 53 at the closed position, so the opening and closing member 53 moves radially outward R2 and is finally disposed on The open position shown in FIG. 19 opens the communication port 49B.

Thereby, the foreign matter scraped off by the brush 76 is pushed into the storage chamber 48A from the communication port 49B, and stored in the storage chamber 48A (see arrow Q3 in FIG. 19 ). Then, as shown in FIG. 20 , when the brush 76 passes the convex portion 53B, the opening and closing member 53 is returned to the closed position by the urging member 55 . Thereby, foreign matter can be prevented from flowing backward from the storage chamber 48A to the capture chamber 41A.

A push-in member 85 shown in FIG. 21 is provided around the communication port 49B in the cylindrical portion 46 . The push-in member 85 is provided at, for example, a rear end portion of the lower end edge 49D of the communication port 49B, and protrudes toward the capture chamber 41A (see FIG. 5 ). FIG. 21 shows a cross section of the filter unit 10 at a position where the push-in member 85 can be seen at almost the same timing as FIG. 17 . At this time, the pushing member 85 is located at a position away from the brush 76 that has entered the communication port 49B toward the downstream side in the one direction S1.

When the opening and closing member 53 moves to the open position with the rotation of the cleaning unit 60, the push-in member 85 passes through the notch 63A of the nearest side plate 63 in the rotating body 61, and starts to move from the radial direction as shown in FIG. The outer side R2, specifically from the upper side Z1, contacts the convex portion 80 (see FIG. 10 ) in the rear end portion of the rail portion 75 of the scraper member 62 . Then, when the cleaning unit 60 is further rotated, as shown in FIG. 23 , the pushing member 85 presses the convex portion 80 from the radially outer side R2 , whereby the scraping member 62 is pushed toward the retracted position side. Then, as shown in FIG. 24 , when the pushing member 85 further presses the protrusion 80 , the brush 76 of the scraping member 62 is separated from the communication port 49B radially inward R1 .

In this way, the pushing member 85 forcibly pushes the scraping member 62 in front of the pushing member 85 passing through the communication port 49B toward the withdrawn position side. This prevents the scraper member 62 from being caught by the lower end edge 49D of the communication port 49B, so that the scraper member 62 can continue to rotate smoothly.

As described above, the foreign matter captured on the inner peripheral surface 46A of the cylindrical portion 46 is transferred to the storage chamber 48A without staying in the capture chamber 41A, so that the capture chamber constituting the passage of water in the drainage channel 5 can be suppressed. The amount of foreign matter increased in 41A. As a result, the inner peripheral surface 46A of the cylindrical portion 46 can be kept clean for a long time, so that the net 52 of the inner peripheral surface 46A is quickly clogged and the water flow in the drainage channel 5 is prevented from being deteriorated. Therefore, clogging of the filter 41 can be suppressed, and a smooth flow of water in the drainage channel 5 can be ensured.

In addition, since the scraping member 62 is urged by the urging member 81 toward the advancing position side of the inner peripheral surface 46A of the cylindrical portion 46 , the brush 76 of the scraping member 62 is constantly pressed against the inner peripheral surface 46A. Therefore, even if there is a slight error in the relative position of the scraping member 62 and the inner peripheral surface 46A of the cylindrical portion 46, the scraping member 62 can effectively scrape foreign matter from the inner peripheral surface 46A of the cylindrical portion 46 through the brush 76 and remove the foreign matter. The foreign matter is pushed into the storage chamber 48A from the communicating port 49B.

In addition, when the scraping member 62 passes through another communication port 49C in the cylindrical portion 46 that communicates the capture chamber 41A with the storage chamber 48A, the water in the capture chamber 41A will flow into the storage chamber 48A from the communication port 49C (see FIG. 24 arrow Q4). Then, the foreign matter in the storage chamber 48A is pushed into the depth of the storage chamber 48A by the downward flow of water flowing into the storage chamber 48A. Thereby, a space for accommodating subsequent foreign objects can be ensured in the storage chamber 48A. Furthermore, since the net 52 is arrange|positioned at 49 C of communication ports, it can suppress that the foreign matter in the storage chamber 48A returns to the capture chamber 41A from the communication port 49C in a floating state.

In terms of maintenance, the user can detach the filter device 21 from the housing 20, open the cover 45 to the open position, and remove foreign matter in the storage chamber 48A (see FIG. 5 ). Since all the foreign matter captured by the filter device 21 is collected in the storage chamber 48A, the user only needs to remove the foreign matter in the storage chamber 48A. Therefore, maintenance is very simple. After the user completes the maintenance, the filter device 21 (refer to FIGS. 4 and 6 ) is attached to the casing 20 after closing the cover 45 to the closed position.

The present invention is not limited to the embodiments described above, and various changes can be made within the scope described in the claims. For example, a configuration in which the above-described opening and closing member 53 is omitted may also be employed.

Claims

A filtering device, characterized in that, comprising:

The filter is provided with: a cylinder part arranged in a drain passage of a washing machine and provided with a cylindrical inner peripheral surface; a capture chamber defined in the cylinder by the inner peripheral surface; The water of the road is taken into the inlet of the capture chamber and a plurality of filter holes distributed on the inner peripheral surface, and the filter captures the water in the inner peripheral surface from the inlet into the capture chamber. foreign matter contained in the water flowing out of the cylindrical part from the filter hole;

a rotating body rotating around the central axis of the inner peripheral surface;

a scraping member arranged in the capture chamber, and scrapes foreign matter from the inner peripheral surface while rotating together with the rotating body; and

The storage chamber is arranged outside the cylinder,

A communication port for communicating the capture chamber and the storage chamber is provided in the cylindrical portion.
The filter device according to claim 1, characterized in that,

the scraping member is slidable between an advanced position close to the inner peripheral surface and a retracted position away from the inner peripheral surface,

The filter device includes an urging member for urging the scraping member toward the advanced position.
The filter device according to claim 2, characterized in that,

A push-in member that pushes the scraper member in front of the push-in member passing through the communication port toward the retracted position side is included.
The filter device according to any one of claims 1 to 3, characterized in that,

The cylindrical portion is provided with another communication port for communicating the capturing chamber and the storage chamber, and a net disposed at the other communication port.
A washing machine, comprising: a washing tub for storing laundry; a drainage path connected to the washing tub; a housing provided with a partial internal space constituting the drainage path; and any one of claims 1 to 4 The filter device, the washing machine is characterized in that,

The filter device can be disassembled in the housing, when the filter device is installed, the filter is arranged in the inner space,

The central axis is parallel to the detachment direction of the filter device to the housing,

The washing machine includes:

a drive section that generates torque; and

The connection part connects the rotating body and the driving part according to the attachment of the filter device to the housing.