Filter and washing machine using the same

Abstract

Provided are a filter capable of efficiently capturing waste such as lint and a washing machine using the same. The lint filter (30) includes a filter body (31) formed with ribs that capture waste when washing water passes through. The filter body (31) includes a plurality of outer ribs (313) formed in a row along the outer periphery of a filter bottom plate (312a), and a plurality of inner ribs (314) formed on the filter bottom plate (312a) to form an inner space (S) surrounded by the outer ribs (313).

Description

Technical Field

[0001] The present invention relates to a filter and a washing machine using the same. Background Art

[0002] In a washing machine, waste such as lint produced during washing is collected by a lint filter in a filter unit (for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-101527 Summary of the Invention

[0006] Technical problems to be solved by the present invention

[0007] However, the lint filter disclosed in Patent Document 1 cannot effectively use the space inside the filter formed in a grid shape.

[0008] Solutions to the Problem

[0009] In order to solve the above-mentioned problems, a first embodiment of the present invention is a filter that is freely detachably accommodated in a filter housing having an inlet for water to flow in and an outlet for water to flow out, and includes: a filter bottom plate; a plurality of outer protrusions protruding from the filter bottom plate; and a plurality of inner protrusions surrounded by the outer protrusions.

[0010] Furthermore, a washing machine according to a second aspect of the present invention includes the above-described filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram showing the main structure of the drum-type washing machine according to the first embodiment.

[0012] Figure 2 This is an exploded perspective view of the filter unit according to the first embodiment as viewed from the upper front obliquely.

[0013] Figure 3 This is an exploded perspective view of the filter unit according to the first embodiment as viewed from obliquely above and rearward.

[0014] Figure 4 1 and 2 are perspective views showing a specific structure of the lint filter according to the first embodiment. (a) shows the lint filter in a state housed in a filter case, and (b) shows the lint filter in a state where the lint filter is removed from the filter case and accumulated dust is removed.

[0015] Figure 5These are plan views showing components of the lint filter according to the first embodiment, (a) showing the filter body, and (b) showing the movable member.

[0016] Figure 6 It is a plan view showing a modified example of the filter body of the first embodiment.

[0017] Figure 7 It is a plan view showing another modified example of the filter body of the first embodiment.

[0018] Figure 8 This is a perspective view showing an example of a lint filter according to a second embodiment.

[0019] Figure 9 This is a perspective view showing another example of the lint filter according to the second embodiment.

[0020] Figure 10 These are diagrams showing an example of the shape of the collecting protrusions formed on the lint filter of the third embodiment, (a) being a perspective view and (b) being a plan view.

[0021] Figure 11 These are diagrams showing other shape examples of the collecting protrusions formed on the lint filter of the third embodiment, (a) being a perspective view and (b) being a plan view.

[0022] Figure 12 It is a plan view showing an example of a lint filter according to a third embodiment.

[0023] Figure 13 It is a plan view showing another example of the lint filter according to the third embodiment. DETAILED DESCRIPTION

[0024] [Implementation Method 1]

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 This is a schematic diagram showing the main components of a drum-type washing machine (washing machine) 10 according to Embodiment 1. Drum-type washing machine 10 comprises a main body 100 and a door 120. Main body 100 includes a washing tub 110 containing a rotary drum 111. Washing tub 110 opens to the front of main body 100, and its interior is sealed liquid-tightly when door 120 is closed.

[0026] In the washing tank 110, the filter unit 20 is connected via the first pipe 131 and the second pipe 132. In addition, a circulation pump 140 is provided in the middle of the second pipe 132. That is, outside the washing tank 110, a circulation path consisting of the first pipe 131, the second pipe 132, the filter unit 20 and the circulation pump 140 is provided, and the washing water circulates between the washing tank 110 and the circulation path during washing. Specifically, the washing water is sent from the washing tank 110 to the filter unit 20 via the first pipe 131, and is returned from the filter unit 20 to the washing tank 110 via the second pipe 132. At this time, garbage such as lint generated during washing is captured by the filter in the filter unit 20, and the washing water from which the garbage is removed is returned to the washing tank 110. In addition, in Figure 1 In the embodiment, second pipe 132 is connected to the back side of washing tub 110, but the connection position of second pipe 132 to washing tub 110 is not particularly limited.

[0027] A third pipe 133 for draining water is also connected to the filter unit 20. A circulation pump 140 is connected to the second pipe 132, and a solenoid valve 151 is provided on the third pipe 133. Specifically, during washing, the solenoid valve 151 on the third pipe 133 side is closed, and the circulation pump 140 on the second pipe 132 side is activated, thereby circulating the wash water. During draining, the circulation pump 140 is stopped, and the solenoid valve 151 is opened, thereby draining the water from the washing tub 110.

[0028] Next, a specific configuration of the filter unit 20 according to the first embodiment will be described. Figure 2 This is an exploded perspective view of the filter unit 20 as viewed from the upper front. Figure 3 This is an exploded perspective view of the filter unit 20 as viewed from the upper rear.

[0029] The filter unit 20 consists of a filter housing 21, a lint filter (filter) 30, and a knob member 22. The filter housing 21 is a bottomed, cylindrical housing member that houses the lint filter 30. The filter housing 21 is positioned within the drum-type washing machine 10 with the longitudinal axis of the drum portion oriented in the front-to-back direction. In the following description, the orientation of the filter unit 20 indicates its placement within the drum-type washing machine 10, with the front portion corresponding to the front of the drum-type washing machine 10 and the rear portion corresponding to the rear of the drum-type washing machine 10.

[0030] The front side of the filter housing 21 is provided with an insertion port 211 for inserting the lint filter 30. The lint filter 30 is attachable to and detachable from the filter housing 21 through the insertion port 211. More specifically, the lint filter 30 is attached to and detached from the filter housing 21 while being mounted on the knob member 22. To do this, the front end of the lint filter 30 is inserted into the rear end of the knob member 22, securing the lint filter 30 to the knob member 22. Furthermore, a male screw portion 221 is formed in the knob member 22, and a female screw portion 212 is formed in the insertion port 211 of the filter housing 21. By rotating the knob member 22, the lint filter 30 can be attached to and detached from the filter housing 21.

[0031] An inlet 213, a first outlet 214 (serving as an outlet), and a second outlet 215 are formed on the side of the cylindrical portion of the filter housing 21. The inlet 213 is located above the filter housing 21 and is connected to the first pipe 131. The first outlet 214 and the second outlet 215 are located on the sides of the filter housing 21. The first outlet 214 is connected to the second pipe 132, and the second outlet 215 is connected to the third pipe 133. The lint filter 30 within the filter housing 21 is positioned between the inlet 213 and the first and second outlets 214, 215. This allows the lint filter 30 to function as a filter for the wash water (circulating water) flowing from the inlet 213 to the first outlet 214 during washing, and for the wash water (discharge water) flowing from the inlet 213 to the second outlet 215 during drainage.

[0032] Figure 4 The following are perspective views showing the specific structure of the lint filter 30 according to the first embodiment. (a) shows it housed in the filter housing 21, and (b) shows it removed from the filter housing 21 to remove accumulated debris. The lint filter 30 is composed of a filter body 31 and preferably a movable member 32. Figure 5 (a) is a top view showing the filter body 31, Figure 5 (b) is a top view showing the movable member 32. The movable member 32 is provided to facilitate cleaning of the lint filter 30 and is not essential to the present invention. In other words, the lint filter 30 may be constructed with only the filter body 31, omitting the movable member 32.

[0033] The filter body 31 is composed of a base 311 inserted into the knob member 22 and a filter portion 312 extending rearward from the base 311. The filter portion 312 includes a plurality of outer ribs (outer protrusions) 313 and a plurality of inner ribs (inner protrusions) 314 extending in parallel in the vertical direction (vertical direction) from a filter bottom plate 312a. The vertical direction of the filter body 31 indicates the state in which the lint filter 30 is housed in the filter case 21.

[0034] The outer ribs 313 of the filter portion 312 are ribs formed in a row along the outer periphery of the filter bottom plate 312a. The inner ribs 314 are ribs that form an inner space S surrounded by the outer ribs 313 on the filter bottom plate 312a.

[0035] When the filter unit 20 is in use (either during washing or draining), wash water flowing in through the inlet 213 of the filter housing 21 flows from above the filter portion 312 into the inner space S, passes between the inner ribs 314 and the outer ribs 313, and flows out through the first outlet 214 or the second outlet 215 located on the side of the filter housing 21. At this time, debris such as lint that has entered the wash water becomes entangled with the inner and outer ribs 314, 313 of the filter portion 312 and is captured.

[0036] The movable member 32 can be inserted from above relative to the filter portion 312 and can slide parallel to the ribs (outer ribs 313 and inner ribs 314) of the filter portion 312 in the vertical direction. At this time, a plurality of through holes (or grooves) 321 are formed in the movable member 32 at positions corresponding to the ribs of the filter portion 312. The surrounding portion of the through holes 321 serves as a guide for the movable member 32 to move along the ribs of the filter portion 312. When the lint filter 30 is housed in the filter housing 21, as shown in FIG. Figure 4 As shown in (a), the movable member 32 is pressed downward so as to come into contact with the filter bottom plate 312a of the filter unit 312.

[0037] When the filter unit 20 is used, the dust collected by the filter body 31 is accumulated on the upper side of the movable member 32. When removing the dust accumulated in the filter unit 20, the lint filter 30 is pulled out from the filter housing 21. Figure 4 As shown in (b), the movable member 32 is pulled upward. Since the collected debris accumulates on the upper surface of the movable member 32, the action of pulling up the movable member 32 scrapes away and collects debris such as lint stuck to the ribs of the filter portion 312, making it easy to remove the debris from the lint filter 30. In this case, the user does not need to come into contact with the debris accumulated on the lint filter 30 while pulling up the movable member 32.

[0038] In addition, the movable member 32 preferably includes a handle portion 322 that protrudes outward from the side surface of the filter portion 312. By providing the handle portion 322 on the movable member 32, the user can easily move the movable member 32.

[0039] The lint filter 30 of the first embodiment can capture dust not only with the outer ribs 313 of the filter portion 312 but also with the inner ribs 314. That is, the inner space S of the filter portion 312 can be effectively utilized to capture dust, and dust such as lint can be efficiently captured.

[0040] The outer ribs 313 preferably have a rectangular cross-section. By making the outer ribs 313 have a rectangular cross-section, lint and the like are more likely to get caught on the corners of the ribs, thereby improving the ability to capture garbage. In addition, the strength of the ribs is improved compared to ribs with a circular cross-section. Furthermore, the outer ribs 313 preferably have the short sides of the rectangle arranged in a direction opposite to the inner space S. This reduces the resistance to the flow of water and improves the strength of the ribs, compared to the case where the long sides of the rectangle are opposite to the inner space S. In addition, it is also easy to increase the number of outer ribs 313, thereby improving the ability to capture garbage. The inner ribs 314 preferably have a rectangular cross-section, similar to the outer ribs 313. As a result, lint and the like are more likely to get caught on the corners of the ribs, thereby improving the ability to capture garbage.

[0041] The configuration of the inner rib 314 in the inner space S is, for example, as Figure 5 As shown in (a), the inner ribs 314 can be arranged alternately along the long side direction (front-back direction) of the filter portion 312. In this case, since the flow of water in the inner space S becomes complicated, garbage such as thread ends becomes easy to be caught on the inner ribs 314, and the garbage collection performance of the inner ribs 314 can be improved. However, the arrangement of the inner ribs 314 in the inner space S is not limited to Figure 5 The example shown in (a) can also be Figure 6 、 Figure 7 The following is an example of a configuration.

[0042] Figure 6 The example in which the inner ribs 314 are arranged in a row along the flow direction of water in the filter portion 312 is shown. Figure 6 As indicated by the arrows, the direction is from the inlet 213 toward the first outlet 214 or the second outlet 215. Furthermore, when the inner ribs 314 are arranged in a row along the water flow direction, the inner ribs 314 do not hinder the flow of water, and the flow resistance of the water can be suppressed.

[0043] Figure 7This example illustrates the appropriate arrangement relationship between the outer ribs 313 and the inner ribs 314. In this example, the ribs located on the outermost periphery of the inner space S (i.e., the ribs closest to the outer ribs 313) are positioned so as to face the gaps between adjacent outer ribs 313. This arrangement bends the water flow between the outer and inner ribs 313, making it easier for lint to become entangled in the ribs, thereby improving waste collection.

[0044] At this time, the inter-rib gap A between the outer ribs 313 is preferably wider than the inter-rib gap B between the outer ribs 313 and the inner ribs 314 (A>B). Furthermore, the inter-rib gap A between the outer ribs 313 is preferably equal to or slightly narrower than the width C of the opposing surfaces of the inner ribs 314 and the outer ribs 313 (A≤C). When these conditions are met, lint and other items are more easily entangled in the ribs, improving waste collection.

[0045] In addition, the height of the inner ribs 314 may be the same throughout the inner space S, or may be different. Figure 4 The heights are shown as different. For example, the height of the inner ribs 314 is preferably lower near the first outlet 214 and higher near the second outlet 215, gradually changing along the long side direction (front-to-back direction) of the filter portion 312. In this case, the height of the lowest rib near the first outlet 214 is preferably set to about 1 / 2 the height of the highest rib near the second outlet 215. By making the heights of the inner ribs 314 different in this way, the capture efficiency near the first outlet 214 can be set to be lower than that near the second outlet 215 in the filter unit 20, thereby suppressing clogging of garbage near the first outlet 214 during washing (when circulating washing water).

[0046] Furthermore, the inner ribs 314 may be arranged at a different density within the inner space S. In the filter housing 21, the first outlet 214 and the second outlet 215 are arranged on the same side relative to the central axis of the filter housing 21. Within the inner space S, water flows more on the side where the first outlet 214 and the second outlet 215 are located. Therefore, the inner ribs 314 may be arranged densely (more per unit area) on the side where the first outlet 214 and the second outlet 215 are located, and sparsely (fewer per unit area) on the opposite side. Thus, waste is efficiently captured by the inner ribs 314. Alternatively, to prevent clogging of the first outlet 214 and the second outlet 215, the inner ribs 314 may be arranged sparsely (fewer per unit area) on the side where the first outlet 214 and the second outlet 215 are located, and densely (more per unit area) on the opposite side.

[0047] [Implementation Method 2]

[0048] In the first embodiment described above, the movable member 32 can be omitted from the lint filter 30 . However, in the second embodiment, a suitable example will be described in which the movable member 32 is used in the lint filter 30 .

[0049] Figure 8 This example shows a configuration in which a portion (at least one) of the inner ribs 314 is used as a positioning rib (positioning protrusion) 314P for the movable member 32. The positioning rib 314P is taller than the other inner ribs 314. When the movable member 32 is mounted on the filter body 31, the positioning rib 314P initially fits into the through-hole 321 of the movable member 32, positioning the movable member 32 relative to the filter body 31. Initially positioning the movable member 32 with the positioning rib 314P facilitates mounting the movable member 32 relative to the filter body 31, which includes the majority of ribs.

[0050] In addition, the positioning ribs 314P can be used as an aid when pulling the movable part 32 out of the filter body 31. As described in Embodiment 1, since the captured garbage accumulates on the upper side of the movable part 32, the garbage can be easily removed from the lint filter 30 by pulling up the movable part 32. At this time, there are cases where thread ends stuck in the ribs become resistance, making it difficult to pull up the movable part 32. In such a case, for example, if the user holds the handle 322 of the movable part 32 with one finger (index finger, middle finger, etc.) and pulls it up, while pressing the positioning rib 314P from above with other fingers (thumb, etc.), it becomes easier to pull the movable part 32. In addition, in this case, it is preferable that the positioning rib 314P is larger in cross-section than the other inner ribs 314, etc., so as to improve the strength.

[0051] Figure 9 This is an example of a structure in which a part of the outer rib 313 is used as a positioning rib (positioning protrusion) 313P of the movable member 32. Figure 9 In the example, the four outer ribs 313 at the four corners are used as positioning ribs 313P. The positioning ribs 313P are higher than the other outer ribs 313. In the filter body 31 including the positioning ribs 313P, the movable member 32 is initially positioned by the positioning ribs 313P, thereby making it easier to install the movable member 32 relative to the filter body 31. In addition, the positioning ribs 313P can be used together with the positioning ribs 313P. Figure 8 Similarly, the positioning rib 314P is used as an auxiliary when the movable member 32 is pulled out from the filter body 31. In this case, the positioning rib 313P is preferably made larger in cross section than the other outer ribs 313 to improve its strength.

[0052] [Implementation Method 3]

[0053] In the first embodiment, the inner ribs 314 are provided in the inner space S of the filter portion 312 of the lint filter 30. However, the inner ribs 314 may not be provided in the inner space S. In the third embodiment, the inner ribs 314 are replaced with the inner ribs 314 in the lint filter 30. Figure 10 or Figure 11 The structure of the collecting protrusion (inner protrusion) 315 is described below. Figure 10 (a) and Figure 11 (a) is a perspective view of the collecting protrusion 315, Figure 10 (b) and Figure 11 (b) is a top view of the collecting protrusion 315. The collecting protrusion 315 is shaped so as to easily collect garbage relative to the predetermined water flow direction α, and is, for example, in the shape of a triangular pyramid.

[0054] Figure 10 The collecting protrusion 315 shown includes first to third ridge lines 3151 to 3153. The first ridge line 3151 and the second ridge line 3152 are shorter than the third ridge line 3153. Figure 10 As shown in (b), by arranging the third edge 3153 so that it is on the downstream side of the water flow direction α, the surface facing upstream of the water flow direction α (the surface sandwiched between the first and second edge lines 3151 and 3152) becomes a surface that stands nearly vertically when viewed horizontally, perpendicular to the water flow direction α, while the side facing downstream of the water flow direction α (the third edge line 3153) becomes a side that lies nearly horizontally when viewed horizontally. This makes it easier for the collecting protrusions 315 to capture trash relative to the water flow direction α. ​​On the other hand, if trash captured by the collecting protrusions 315 is directed in a direction opposite to the water flow direction α, it can be easily washed away.

[0055] Figure 11 The collecting protrusion 315 shown includes first to third ridge lines 3151 to 3153. The first ridge line 3151 is shorter than the second ridge line 3152 and the third ridge line 3153. Figure 11As shown in (b), the arrangement is such that the first edge 3151 is positioned upstream of the water flow direction α. ​​This allows the edge facing upstream of the water flow direction α (first edge 3151) to stand nearly vertically when viewed horizontally, perpendicular to the water flow direction α, while the surface facing downstream of the water flow direction α (the surface sandwiched between the second and third edges 3152 and 3153) to lie nearly horizontally when viewed horizontally. This makes it easier for the collection protrusions 315 to capture trash relative to the water flow direction α. ​​On the other hand, if trash captured by the collection protrusions 315 is directed in a direction opposite to the water flow direction α, it can be easily washed away.

[0056] In addition, the collecting protrusions 315 may be formed in such a way that the shapes of the collecting protrusions 315 at the upstream portion and the collecting protrusions 315 at the downstream portion are different in the direction of water flow from the inlet 213 toward the first outlet 214 or the second outlet 215. For example, the width of the collecting protrusions 315 at the upstream portion may be wider than the width of the collecting protrusions 315 at the downstream portion. Alternatively, the collecting protrusions 315 at the upstream portion may be formed at a larger angle than the collecting protrusions 315 at the downstream portion (for example, at Figure 11 In the collecting protrusion 315, the angle formed by the second ridge line 3152 and the third ridge line 3153 is larger in the upstream portion than in the downstream portion).

[0057] Figure 12 1 is a diagram showing an example of the lint filter 30 of the third embodiment, and is a configuration example in which the lint filter 30 includes a movable member 32. In the case where the lint filter 30 includes the movable member 32, the collecting protrusions 315 are formed on the upper surface of the movable member 32. Figure 12 In the example of FIG, the longitudinal direction (front-to-back direction) of the filter unit 312 is assumed to be the water flow direction α described above, and the collecting protrusions 315 are arranged. Thus, the collecting protrusions 315 can achieve a waste collecting effect when water flows from front to back along the longitudinal direction of the filter unit 312.

[0058] Figure 13 : is a diagram showing another example of the lint filter 30 of the present embodiment 3. In this example, it is also assumed that the lint filter 30 includes a movable member 32, and the collecting protrusion 315 is formed on the upper surface of the movable member 32. Figure 13 In the example, the direction from the inlet 213 toward the first outlet 214 or the second outlet 215 is assumed to be the water flow direction α, and the collecting protrusions 315 are arranged. As a result, the collecting protrusions 315 can achieve a garbage collecting effect particularly near the filter portion 312 of the first outlet 214 or the second outlet 215.

[0059] In addition, although the example Figure 12 as well as Figure 13 30 uses of lint filter Figure 10 The case of the capture protrusion 315 shown, but it is also possible to use Figure 11 Although not shown in the figure, when the lint filter 30 does not include the movable member 32 , the collecting protrusion 315 may be formed on the filter bottom plate 312 a of the filter body 31 .

[0060] The filter and washing machine of the present invention can also be described as follows. The present invention is a filter that is detachably housed in a filter housing having an inlet for water inflow and an outlet for water outflow, comprising: a filter body having ribs formed thereon for collecting trash; the filter body including: a plurality of outer ribs formed in a row along the outer periphery of a filter base; and a plurality of inner ribs forming an inner space on the filter base surrounded by the outer ribs.

[0061] According to the above configuration, since the dust can be captured not only by the outer ribs but also by the inner ribs, the inner space of the filter can be effectively utilized to capture the dust, and dust such as lint can be efficiently captured.

[0062] Furthermore, in the above filter, the outer rib may have a rectangular cross section, and a short side of the rectangle may be arranged in a direction facing the inner space.

[0063] According to the above configuration, the outer ribs have a rectangular cross-section, which makes it easier for lint and other debris to get caught in the rib corners, improving waste collection. Furthermore, the shorter sides of the outer ribs are positioned in a direction facing the inner space, which reduces resistance to water flow and improves rib strength. Furthermore, it is easy to increase the number of outer ribs, further improving waste collection.

[0064] In addition, in the above-mentioned filter, the filter housing that accommodates the filter can be configured to include, as the outflow outlet, a first outflow outlet for circulating water during washing and a second outflow outlet for draining water during draining, and the inner ribs are constructed with different heights in a manner such that they are lower near the first outflow outlet and higher near the second outflow outlet.

[0065] According to the above configuration, by making the height of the inner ribs different, the collection performance near the second outlet can be set lower than that near the first outlet, thereby suppressing clogging of garbage near the second outlet during washing (when circulating washing water).

[0066] In the above filter, the inner ribs may be densely provided on a side close to the outflow port, and sparsely provided on a side away from the outflow port.

[0067] According to the above configuration, since the inner ribs are densely provided on the side close to the outflow port where the water flow is greater, the garbage can be efficiently collected.

[0068] Furthermore, in the above-mentioned filter, the inner rib disposed on the outermost peripheral side of the inner space may be disposed so as to face the gap between two adjacent outer ribs, and the inter-rib gap between the outer ribs may be configured to have a dimension less than the width of the opposing surface of the inner rib. Alternatively, in the above-mentioned filter, the inner rib disposed on the outermost peripheral side of the inner space may be disposed so as to face the gap between two adjacent outer ribs, and the inter-rib gap between the outer ribs may be configured to have a dimension larger than the inter-rib gap between the outer ribs.

[0069] According to the above-mentioned configuration, lint and the like are more likely to get caught on the ribs, and the dust collecting performance of the filter is improved.

[0070] In addition, the above-mentioned filter can be configured to include a movable component that is arranged between the ribs of the filter body and has a guide portion that guides movement along the ribs. At least a portion of the outer rib or the inner rib is higher than the other outer ribs or the other inner ribs and is configured to be a positioning rib that positions the movable component relative to the filter body.

[0071] According to the above configuration, when the movable member is installed in the filter body, the positioning ribs can initially position the movable member relative to the filter body, making it easier to install the movable member relative to the filter body including the majority of ribs. In addition, the positioning ribs can be used as an aid when removing the movable member from the filter body.

[0072] In addition, another filter of the present embodiment is a filter that is freely mounted and removably accommodated in a filter housing having an inlet for water to flow in and an outlet for water to flow out; wherein the filter comprises: a filter body having ribs for capturing garbage; the filter body comprises: a plurality of outer ribs formed in a row along the outer periphery of the filter bottom plate; and a plurality of capturing protrusions formed on the filter bottom plate within an inner space surrounded by the outer ribs; the capturing protrusions are shaped so as to be more likely to capture garbage relative to a predetermined water flow direction than in other directions.

[0073] In addition, another other filter of the present embodiment is a filter that is freely loaded and unloaded and housed in a filter housing having an inlet for water to flow in and an outlet for water to flow out; wherein, the filter comprises: a filter body having ribs for capturing garbage; and a movable member that is arranged between the ribs of the filter body and has a guide portion for guiding movement along the ribs; the filter body comprises: a plurality of outer ribs formed in a row along the outer periphery of the filter bottom plate; the movable member comprises: a plurality of capturing protrusions on which an inner space surrounded by the outer ribs is formed; the capturing protrusions are shaped so as to be easier to capture garbage than in other directions relative to a predetermined water flow direction.

[0074] According to the above configuration, the collecting protrusions can easily collect dust relative to the water flow direction, and the inner space of the filter can be effectively utilized to collect dust, so that dust such as lint can be efficiently collected.

[0075] In addition, in the above-mentioned filter, the collecting protrusion can be configured to have a triangular pyramid shape including three ridges, and the surface or edge facing upstream of the predetermined water flow direction becomes a surface that stands up nearly vertically when viewed from a horizontal direction perpendicular to the water flow direction, and the surface or edge facing downstream of the predetermined water flow direction becomes a surface that lies nearly horizontally when viewed from a horizontal direction perpendicular to the water flow direction.

[0076] According to the above configuration, the collecting protrusions can easily collect dust in the direction opposite to the water flow direction, and the dust collected by the collecting protrusions can be easily washed away by causing water to flow in the direction opposite to the water flow direction.

[0077] Furthermore, the washing machine according to this embodiment includes the above-described filter.

[0078] The embodiments disclosed herein are for illustrative purposes only and are not intended to be limiting. Therefore, the technical scope of the present invention is not solely defined by the embodiments described above, but is defined based on the scope of the claims. Furthermore, all modifications within the meaning and scope equivalent to the claims are encompassed.

[0079] Description of Reference Numerals

[0080] 10...Drum-type washing machine (washing machine); 110...Washing tub; 131...First pipe; 132...Second pipe; 133...Third pipe; 140...Circulation pump; 151...Solenoid valve; 20...Filter unit; 21...Filter housing; 213...Inlet; 214...First outlet (outlet); 215...Second outlet (outlet); 22...Knob member; 30...Lint filter (filter); 31...Filter body; 311...Base; 312...Filter portion; 312a...Filter bottom plate; 313...Outer rib (outer protrusion); 314...Inner rib (inner protrusion); 315...Collection protrusion (inner protrusion); 3151...First ridgeline; 3152...Second ridgeline; 3153...Third ridgeline; 32...Movable member; 321...Through hole; 322...Handle; S...Inner space

Claims

1. A filter detachably housed in a filter housing having an inlet for water to flow in and an outlet for water to flow out, characterized in that: include: filter base; a plurality of outer protrusions protruding from the filter bottom plate; as well as a plurality of inner protrusions, surrounded by the outer protrusions, The plurality of outer protrusions include two outer protrusions spaced apart from each other along the direction in which the end edge of the filter bottom plate extends. The two outer protrusions each have an elongated cross-sectional shape extending in a direction perpendicular to the arrangement direction of the two outer protrusions. The plurality of inner protrusions include an inner protrusion having an elongated cross-sectional shape whose longitudinal direction is different from the longitudinal direction of the outer protrusion. The filter housing has a first outflow port for circulating water during washing and a second outflow port for discharging water during drainage as outflow ports. The inner protrusion is higher at a position closer to the second outflow outlet than the first outflow outlet.

2. The filter according to claim 1, characterized in that The outer protrusion and the inner protrusion are different in shape or direction.

3. The filter according to claim 1 or 2, characterized in that The outer protrusion has a rectangular cross-sectional shape including a short side and a long side; The short side faces the inner protrusion.

4. The filter according to claim 1, characterized in that The number of the inner protrusions per unit area is greater on the side farther from the outflow port than on the side closer to the outflow port.

5. The filter according to claim 1, characterized in that The gap between the adjacent outer protrusions is equal to or smaller than the width of the inner protrusion.

6. The filter according to claim 1, characterized in that A gap between adjacent outer protrusions is larger than a gap between the outer protrusion and the inner protrusion.

7. The filter according to claim 1, characterized in that The inner protrusion has an upstream portion provided upstream of the flow of water from the inlet toward the outflow, and a downstream portion provided downstream. Compared with the width of the downstream portion, the width of the upstream portion is wider.

8. The filter according to claim 1, characterized in that Include: The movable member is provided between the outer protrusions and has a guide portion formed thereon for guiding movement along the outer protrusions.

9. The filter according to claim 8, characterized in that The inner protrusion is formed on the movable member.

10. The filter according to claim 1, characterized in that Include: The positioning protrusion has a height higher than the outer protrusion and the inner protrusion.

11. A washing machine, characterized in that: include: The filter according to any one of claims 1 to 10.

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