Cabinet and washing machine

Abstract

Provided are a case capable of inhibiting the remaining of a washing treatment agent and a washing machine. The case houses a washing treatment agent that is put into a washing tub of the washing machine. The case has a main body portion and a water supply portion. The main body portion has a bottom portion that receives the washing treatment agent. The water supply portion supplies water to the main body portion. The bottom portion has an upper surface formed in such a manner that one end portion in a first direction is located at a position higher than the other end portion. The upper surface includes an inclined portion in which a first slope indicating a ratio of a distance in a vertical direction to a distance in the first direction varies in the first direction.

Description

Technical Field

[0001] This invention relates to cabinets and washing machines. This application claims priority based on Japanese Patent Application No. 2020-190891, filed on November 17, 2020, the contents of which are incorporated herein by reference. Background Technology

[0002] In recent years, technologies that mimic and utilize the diverse functions of living organisms, known as biomimetics, have attracted attention. Furthermore, as an example of applying such biomimetics to the manufacture of electrical products, Nature Technology (registered trademark) is known.

[0003] Previously, a washing machine with a detergent dispenser (box) was disclosed (for example, see Patent Document 1), which has a receiving chamber for storing detergent (washing agent).

[0004] The washing machine of Patent Document 1 includes: a detergent dispenser having a first receiving chamber for containing detergent; and a flow path structure having a flow path formed on the detergent dispenser. The flow path structure has a plurality of flow holes for guiding water in the flow path to the detergent dispenser. The detergent dispenser includes a partition wall that divides the first receiving chamber into a mixing chamber for generating an aqueous solution of detergent by mixing detergent and water, and a foaming chamber for foaming the aqueous solution flowing into the mixing chamber.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2015-192771 Summary of the Invention

[0008] The technical problem to be solved by the present invention

[0009] Inside the container, the detergent may remain as it is insoluble in water.

[0010] This disclosure provides a cabinet and a washing machine capable of suppressing detergent residue.

[0011] Technical solutions for solving technical problems

[0012] One embodiment of this disclosure includes a housing for receiving detergent into the washing tub of a washing machine. The housing has a main body and a water supply section. The main body has a bottom for receiving the detergent. The water supply section supplies water to the main body. The bottom has an upper surface formed such that one end is positioned above the other end in a first direction. The upper surface includes an inclined portion with a first slope varying in the first direction, representing the ratio of the vertical distance to the distance in the first direction.

[0013] One aspect of the washing machine disclosed herein includes: the cabinet; and a washing tub, wherein the detergent contained in the cabinet is added together with water. Attached Figure Description

[0014] Figure 1 This is a perspective view of the washing machine as described in the embodiment.

[0015] Figure 2 It is an enlarged 3D image showing the state of the washing machine after the top cover has been removed.

[0016] Figure 3 This is an exploded perspective view of the casing of the washing machine used in the same manner.

[0017] Figure 4 This is a perspective view of the main body of the same box.

[0018] Figure 5 This is a top view of the first containment chamber of the main body, as described above.

[0019] Figure 6 yes Figure 5 AA-line cross-section diagram.

[0020] Figure 7 yes Figure 5 BB line cross-section diagram.

[0021] Figure 8 yes Figure 5 A cross-sectional view of the CC line.

[0022] Figure 9 yes Figure 5 DD line cross-section diagram.

[0023] Figure 10 yes Figure 5 EE line cross-section diagram.

[0024] Figure 11 yes Figure 5 FF line cross-section diagram.

[0025] Figure 12 This is the first exploded perspective view of the water supply section of the same box.

[0026] Figure 13 This is the second exploded perspective view of the water supply section, as described above.

[0027] Figure 14 This is a top view of the water supply unit, as described above.

[0028] Figure 15 This is an enlarged top view of the first water supply hole of the same water supply unit.

[0029] Figure 16 This is an enlarged 3D view of the first water supply hole, as shown above.

[0030] Figure 17A This is a top view of the first modified example of the first water supply hole.

[0031] Figure 17B This is a top view of the first modified example of the second water supply hole.

[0032] Figure 17C This is a top view of the first modified example of the third water supply hole.

[0033] Figure 17D This is a top view of the first modified example of the fourth water supply hole.

[0034] Figure 18 This is a top view of the first variant of the first containment chamber.

[0035] Figure 19 yes Figure 18 GG line cross-sectional diagram.

[0036] Figure 20 yes Figure 18 HH line cross-sectional diagram.

[0037] Figure 21 yes Figure 18 Sectional view of line II.

[0038] Figure 22 This is a top view of the second variant of the first containment chamber.

[0039] Figure 23 yes Figure 22 Cross-sectional view of the JJ line.

[0040] Figure 24 yes Figure 22 KK line cross-section diagram.

[0041] Figure 25 yes Figure 22 LL line cross-section diagram.

[0042] Figure 26 yes Figure 22 MM line cross-sectional diagram. Detailed Implementation

[0043] The embodiments and modifications described below are merely examples of the present invention, and this disclosure is not limited to the embodiments and modifications. Various changes can be made according to design, etc., without departing from the technical concept of the present invention, in addition to these embodiments and modifications.

[0044] (Implementation Method)

[0045] The following is for reference Figures 1 to 16 The washing machine 1 and the housing 2 used in the washing machine 1 of this embodiment will be described below. Figure 1 The directions shown are for illustrative purposes only and do not specify the direction of use.

[0046] The washing machine 1 of this embodiment includes a frame 11, a top cover 12, a washing tub 13, and a cabinet 2.

[0047] The frame 11 is formed in the shape of a square tube, and houses the washing tub 13 and the box 2 inside. The frame 11 has an opening 111 on its upper surface. The user can put and take out the laundry into the washing tub 13 through the opening 111.

[0048] The upper cover 12 is configured as an opening 111 for opening and closing the frame 11. The upper cover 12 is configured to be located at the rear end 313 of the upper cover 12 and rotate about a rotation axis in the left and right direction to open and close the opening 111 of the frame 11.

[0049] The washing tank 13 is cylindrical, open at the top, and has a bottom. The opening of the washing tank 13 is configured to be continuous vertically with the opening 111 of the frame 11. A detergent is added to the washing tank 13 along with water. The detergent is, for example, detergent, fabric softener, etc. An agitator is provided at the bottom of the washing tank 13. The agitator is rotatable relative to the washing tank 13. By rotating, the agitator, for example, stirs the laundry along with an aqueous solution of detergent dissolved in water. Thus, the laundry is washed. The detergent added to the washing tank 13 is contained in the housing 2.

[0050] The housing 2 is located within the frame 11. Specifically, the housing 2 is positioned to protrude from the back panel 112 of the frame 11. The back panel 112 is positioned between the opening 111 of the frame 11 in the vertical direction and the opening of the washing tub 13. The back panel 112 is positioned such that one side formed along the vertical and horizontal directions faces forward.

[0051] The container 2 is a drawer-type container, configured to allow the drawer to extend forward from the back panel 112. The user can pull out the container 2 from the back panel 112 to store the detergent. With the container 2 housed within the back panel 112, water is supplied from above to the detergent stored within it. As a result, the detergent stored in the container 2 dissolves in the water and is discharged from the container 2, falling into the washing tub 13 along with the water.

[0052] Here, the washing agent in this invention is, for example, detergent, fabric softener, bleach, etc. Types of detergents include liquid detergents and powdered detergents. That is, the washing agent contains powdered detergent. Compared to liquid detergents, powdered detergents are less soluble in water and less likely to be discharged from the housing 2. The housing 2 of this embodiment has the following configuration, thereby suppressing detergent residue even when the washing agent is a powdered detergent.

[0053] like Figure 3 As shown, the housing 2 of this embodiment includes a main body 3, a water supply part 4, and a bottom cover 5.

[0054] The main body 3 is configured to have an opening at the top and receive the detergent. Specifically, the main body 3 is formed as a rectangular box with an opening at the top. The main body 3 is configured to be able to be pulled forward from the back panel 112.

[0055] like Figure 4 As shown, the main body 3 divides its internal space into three sections by two partitions 301. The partitions 301 are plate-shaped with their thickness along the left-right direction. The partitions 301 are formed across a portion of the peripheral walls forming the internal space of the main body 3, namely the front wall 302 and the rear wall 303. The two partitions 301 are formed separately in the left-right direction. The main body 3 divides its internal space in the left-right direction by the two partitions 301, thus forming three containment chambers 30 side-by-side in the left-right direction. In distinguishing the three containment chambers 30, the central containment chamber 30 is referred to as the first containment chamber 31, the right-hand containment chamber 30 as the second containment chamber 32, and the left-hand containment chamber 30 as the third containment chamber 33.

[0056] The three containment chambers 30 are assumed to contain different types of detergents. It is envisioned that detergents or bleach are contained in the first containment chamber 31 and the second containment chamber 32, and fabric softener is contained in the third containment chamber 33. Specifically, powdered detergents or bleach are contained in the first containment chamber 31. Liquid detergents or bleach are contained in the second containment chamber 32. Liquid fabric softener is contained in the third containment chamber 33. In this embodiment, it is envisioned that powdered detergent (powdered detergent) is contained in the first containment chamber 31 as the detergent. In the following description, the detergent contained in the first containment chamber 31 will sometimes be referred to as powdered detergent.

[0057] Reference Figures 5 to 11 Detailed description of containment chamber 31. Figure 5 This is a top view of the first containment chamber 31. Figure 6 yes Figure 5 AA section diagram, Figure 7 yes Figure 5 BB cross-section diagram, Figure 8 yes Figure 5 CC section diagram, Figure 9 yes Figure 5 DD cross-sectional view, Figure 10 yes Figure 5 EE cross-sectional view, Figure 11 yes Figure 5 FF cross-sectional view.

[0058] like Figures 5-8 As shown, the first receiving chamber 31 has openings at the top and rear, and a first bottom 311 for receiving a detergent (powder detergent). The first bottom 311 is formed in a plate shape. The rear end 313 of the first bottom 311 is lower than the front end 312. The front end 312 of the first bottom 311 is continuous with the lower end of the front wall 302. Furthermore, at the rear opening of the first receiving chamber 31, the rear end 313 of the first bottom 311 is not continuous with the rear wall 303. In addition, the first bottom 311 is wavy, with its height (vertical position) increasing or decreasing from the front end 312 toward the rear end 313. That is, the first bottom 311 is formed to undulate and descend from the front end 312 to the rear end 313.

[0059] Specifically, the first bottom 311 has a first upper surface 314 for holding powdered detergent. The first upper surface 314 is formed such that the front end portion 312 is located above the rear end portion 313. Furthermore, the first upper surface 314 includes an inclined portion 315. In this embodiment, the entire first upper surface 314 is the inclined portion 315.

[0060] The inclined portion 315 is formed with a first slope change in the front-to-back direction. The first slope represents the ratio of the change in distance in the vertical direction to the change in distance in the front-to-back direction. In other words, the first slope is the degree of inclination in the front-to-back direction. The first slope of the inclined portion 315 is different at different locations in the front-to-back direction.

[0061] Specifically, the inclined portion 315 continuously changes in the front-to-back direction by repeatedly increasing and decreasing the first slope. Further, in this embodiment, the first slope of the inclined portion 315 changes in the front-to-back direction by repeatedly ascending and descending slopes. For example, the polarity of the first slope is set to positive in the case of a descending slope that decreases from front to back. In this case, the first slope of the inclined portion 315 changes in the polarity of the first slope repeatedly between positive and negative in the front-to-back direction. That is, the inclined portion 315 undulates in a repeatedly concave-convex manner in the front-to-back direction. In other words, the inclined portion 315 is formed as a wave shape with repeated increases and decreases in height in the front-to-back direction. In this embodiment, the inclined portion 315 is formed by alternating concave portions 47 and convex portions twice in the front-to-back direction.

[0062] In addition, such as Figures 9-11 As shown, the inclined portion 315 is formed with a second slope changing in the left-right direction. The second slope represents the ratio of the change in distance in the vertical direction to the change in distance in the horizontal direction. In other words, the second slope is the degree of inclination in the left-right direction. The second slope is different at different parts of the inclined portion 315 in the left-right direction.

[0063] Specifically, the inclined portion 315 varies in a manner that the second slope repeatedly increases and decreases in the left-right direction. In this embodiment, the inclined portion 315 is formed such that its central portion in the left-right direction is extremely large. "Extremely large" here refers to the point where the second slope is approximately zero, and the slope changes from an upward slope to a downward slope in the left-right direction. In other words, the inclined portion 315 is formed such that its central portion in the left-right direction is a mountain. Furthermore, in this embodiment, the second slope of the inclined portion 315 locally varies in a manner that repeats both upward and downward slopes in the left-right direction. Specifically, in the portion of the inclined portion 315 further back than the central portion in the front-back direction (hereinafter also referred to as the rear portion), the second slope varies in a manner that repeats both upward and downward slopes. For example, the polarity of the second slope is set to positive in the case of a downward slope that descends from left to right. In this case, the rear portion of the inclined portion 315 varies the second slope in a manner that repeats both positive and negative polarities in the left-right direction. That is, the rear portion of the inclined section 315 undulates in a manner that repeats the concave-convex pattern in the left-right direction. In other words, the rear portion of the inclined section 315 is formed as a wave shape with repeated increases and decreases in height in the left-right direction. In this embodiment, the rear portion of the inclined section 315 is formed in a manner that repeats a downward slope and an upward slope twice in each of the left and right directions.

[0064] Here, the point where the polarity of the second slope changes in the left-right direction is called the polarity change point. For example, a polarity change point refers to the point where, in the left-right direction, the polarity of the second slope changes from positive or negative to zero, or from zero to positive or negative. That is, the polarity change point is the boundary between the portion of the second slope where the polarity is zero and the portion where the polarity is positive or negative. Figure 5 This roughly represents the polarity change line Lx connecting the points of continuous polarity change in the front-to-back direction. As described above, the inclined portion 315 changes in a manner that repeatedly increases and decreases the second slope in the left-to-right direction. Therefore, the inclined portion 315 has multiple polarity change lines Lx. Figure 5 The diagram illustrates five polarity change lines Lx out of a plurality of polarity change lines Lx. As described above, the rear portion of the inclined section 315 changes the second slope by repeating positive and negative polarities in the left and right directions. Therefore, two of the five polarity change lines Lx located on the left and right sides are formed in the rear portion of the inclined section 315. Distinguishing between the five polarity change lines Lx, they are sequentially referred to from left to right as the first polarity change line L1, the second polarity change line L2, ..., the fifth polarity change line L5.

[0065] Furthermore, the intervals between multiple polarity change points in the left-right direction, i.e., the intervals between multiple polarity change lines Lx, are called polarity change intervals. For example... Figure 5 As shown, the inclined portion 315 is formed such that the polarity change interval on the rear end portion 313 side is narrower than the polarity change interval on the front end portion 312 side. In this embodiment, the inclined portion 315 is formed such that the polarity change interval narrows as it moves rearward.

[0066] Furthermore, the average distance between the central portion of the left-right inclined section 315 and each of the multiple polarity change lines Lx (polarity change points) is called the average deviation value. For example... Figure 5 As shown, the inclined portion 315 is formed such that the average deviation value on the rear end portion 313 side is smaller than the average deviation value on the front end portion 312 side. In other words, the inclined portion 315 is formed such that each polarity change line Lx approaches the center of the left-right direction as it moves rearward. Furthermore, strictly speaking, the third polarity change line L3 is formed from the front end portion 312 to the rear end portion 313 of the inclined portion 315 at the center of the left-right direction.

[0067] That is, in this embodiment, the inclined portion 315 is formed such that the polarity change interval narrows as it moves from front to rear, and each polarity change line Lx approaches the center in the left-right direction.

[0068] In addition, such as Figure 5As shown, the main body 3 has a pair of pillars 316 formed on the first bottom 311 of the first receiving chamber 31. Each of the pillars 316 is cylindrical and protrudes upward from the rear end 313 of the first bottom 311. The pair of pillars 316 are formed on the left and right sides of the central portion, sandwiching the central portion of the first bottom 311 in a left-right direction. More specifically, the left pillar 316 of the pair of pillars 316 is formed between the first polarity change line L1 and the second polarity change line L2. The right pillar 316 of the pair of pillars 316 is formed between the fourth polarity change line L4 and the fifth polarity change line L5.

[0069] Next, refer to Figure 4 The second containment chamber 32 and the third containment chamber 33 will be described.

[0070] The second receiving chamber 32 has an opening at the top and a second bottom 321 for receiving liquid detergent or bleach as a washing agent. A second cylindrical portion 322 is formed in the second bottom 321. The second cylindrical portion 322 is cylindrical and protrudes upward from the upper surface of the second bottom 321. The upper and lower ends of the second cylindrical portion 322 are open and extend through in the vertical direction. The second cylindrical portion 322 is covered by a second cover 323.

[0071] The second cover 323 is cylindrical, closed at the upper end and open at the lower end. The second cover 323 is configured to cover the second cylindrical portion 322 from above. The second cover 323 is provided such that a space is formed between the outer peripheral surface of the second cylindrical portion 322 and the upper end. Furthermore, a second flange portion 324 is formed on the second cover 323.

[0072] The second flange portion 324 is formed to protrude radially from the outer peripheral surface of the second cover 323 toward the second cover 323. The second flange portion 324 is positioned vertically slightly below the upper end of the second cylindrical portion 322. In the second receiving chamber 32, liquid detergent can be contained to a position lower than the second flange portion 324.

[0073] For example, suppose that liquid detergent is contained in the second containment chamber 32 as a liquid cleaning agent. When water is supplied to the second containment chamber 32 from above, an aqueous solution of the liquid detergent dissolved in water is generated. Furthermore, when the water level of the aqueous solution exceeds the upper end of the second cylindrical portion 322, the aqueous solution in the second containment chamber 32 is discharged downwards through the interior of the second cylindrical portion 322 via a siphon principle. Figure 3As shown, a bottom cover 5 is provided below the main body 3. The bottom cover 5 is configured to cover the main body 3 from below. The bottom cover 5 has a bottom plate portion 51 that is vertically opposite to the lower surface of the main body 3. The bottom plate portion 51 is formed to slope downwards from rear to front. The front end of the bottom plate portion 51 is located above the opening of the washing tank 13. The aqueous solution discharged from the second receiving chamber 32 is fed into the washing tank 13 along the bottom plate portion 51. In addition, even if the second receiving chamber 32 does not contain liquid detergent, the water supplied to the second receiving chamber 32 is discharged from the second receiving chamber 32 by a siphon principle.

[0074] The upper opening of the third containment chamber 33 has a third bottom 331 for receiving liquid fabric softener as a detergent. The third containment chamber 33 has the same configuration as the second containment chamber 32, having a third cylindrical portion 332, a third cover 333, and a third flange portion 334. The third cylindrical portion 332, the third cover 333, and the third flange portion 334 have the same configuration as the second cylindrical portion 322, the second cover 323, and the second flange portion 324 in the second containment chamber 32, so detailed descriptions are omitted.

[0075] In the third containment chamber 33, similarly to the second containment chamber 32, the fabric softener and water solution contained in the third containment chamber 33 are discharged to the bottom of the third containment chamber 33 by siphon principle and put into the washing tank 13.

[0076] Next, refer to Figures 12-16 Explanation of Water Supply Section 4.

[0077] The water supply unit 4 is configured to supply water from above to each of the receiving chambers 30 of the main body 3. In this embodiment, the water supply unit 4 has a top 41 with an opening at the top and a top cover 410 with an opening at the bottom. The top 41 is configured to cover the main body 3 from above and functions as the top of each receiving chamber 30 (see reference). Figure 3 The top 41 and the top cover 410 are configured to be combined in the vertical direction. By combining the top 41 and the top cover 410, a water supply chamber 42 is formed to temporarily store water supplied to each of the receiving chambers 30. In this embodiment, the water supply chamber 42 is divided into a first water supply chamber 421 and a second water supply chamber 422 by a partition wall 433. The partition wall 433 is formed in such a way that it connects the front wall 431 and the rear wall 432 of the water supply chamber 42. The partition wall 433 includes an inclined wall 434 that is inclined in the left-right direction relative to the front-back direction, such that the front end is further to the right than the rear end. The first water supply chamber 421 and the second water supply chamber 422 are arranged in the left-right direction through the partition wall 433.

[0078] The first water supply chamber 421 is located above the first containment chamber 31 and the second containment chamber 32. The top cover 410 has a first inlet 441. The first inlet 441 is cylindrical. The first inlet 441 protrudes rearward from the right side portion of the partition wall 433 of the rear wall 432 of the water supply chamber 42. The first inlet 441 is connected to a first nozzle. Water flows into the first water supply chamber 421 from the first nozzle through the first inlet 441. The water flowing into the first water supply chamber 421 is supplied to the first containment chamber 31 and the second containment chamber 32 from above.

[0079] In addition, the first water supply chamber 421 is provided with a first partition wall 451, a second partition wall 452, a third partition wall 453, a fourth partition wall 454, a first peripheral wall 455, and a second peripheral wall 456, and the flow of water is controlled.

[0080] The first partition wall 451 is formed as a plate with its thickness in the left-right direction. The first partition wall 451 protrudes downwards from the upper cover 410. The first partition wall 451 is formed on the right side of the first inlet 441 of the upper cover 410, with the first inlet 441 located between it and the partition wall 433. Furthermore, the first partition wall 451 is formed to separate rearwards from the portion of the partition wall 433 that is forward of the inclined wall 434. A flow path for water to flow into the first water supply chamber 421 via the first inlet 441 is formed between the first partition wall 451 and the partition wall 433.

[0081] The second partition wall 452 has a first plate portion 4521 and a second plate portion 4522 formed in a plate shape, which, when viewed from above, form an L-shape. The second partition wall 452 is formed to protrude downward from the upper cover 410. A gap is formed between the lower end of the second partition wall 452 and the top 41.

[0082] The first plate portion 4521 is formed as a rectangular plate with its thickness in the rear-to-rear direction and its length in the left-to-right direction. The first plate portion 4521 is formed from above the first receiving chamber 31 to above the second receiving chamber 32 in the left-to-right direction. The first plate portion 4521 is formed at a position where it separates rearward from the front wall 431 of the first water supply chamber 421, to the right from the partition wall 433, and to the left from the right wall 435 of the first water supply chamber 421. The first plate portion 4521 is formed such that the gap between the partition wall 433, the front wall 431 of the first water supply chamber 421, and the right wall 435 of the first water supply chamber 421 becomes a water flow path.

[0083] The second plate portion 4522 is formed as a plate in the thickness direction in the left-right direction. The second plate portion 4522 is formed as continuous with the right end of the first plate portion 4521.

[0084] The first peripheral wall 455 is formed in a rectangular frame shape. The first peripheral wall 455 is formed behind the second plate portion 4522 in a manner continuous with the rear end of the second plate portion 4522. The first peripheral wall 455 is located above the first receiving chamber 31 and above the second receiving chamber 32. The first peripheral wall 455 is formed at a position where it separates to the right from the partition wall 433 and the first partition wall 451, separates to the left from the right wall 435 of the first water supply chamber 421, and separates to the front from the rear wall 432 of the first water supply chamber 421. The first peripheral wall 455 is formed such that the gap between the first plate portion 4521 of the partition wall 433, the first partition wall 451, the second partition wall 452, the right wall 435 of the first water supply chamber 421, and the rear wall 432 of the first water supply chamber 421 becomes a water flow path. The first peripheral wall 455 is formed to protrude downwards from the top cover 410. A gap is formed between the lower end of the first peripheral wall 455 and the top 41.

[0085] The second peripheral wall 456 is formed in a rectangular frame shape. The second peripheral wall 456 is formed inside the first peripheral wall 455, running along the first peripheral wall 455. The second peripheral wall 456 is formed with a gap between it and the first peripheral wall 455. The second peripheral wall 456 is formed to protrude upwards from the top 41. A gap is formed between the upper end of the second peripheral wall 456 and the upper cover 410. Furthermore, the second peripheral wall 456 is formed with the front wall lower than the rear wall.

[0086] The third partition wall 453 is formed in the shape of a plate, extending from the left end of the first plate portion 4521 of the second partition wall 452 along the right rear. A gap is formed between the third partition wall 453 and the first peripheral wall 455 at the right rear end. The gap between the third partition wall 453 and the first peripheral wall 455 is formed as a water flow path. The third partition wall 453 is formed to protrude upward from the top 41.

[0087] The fourth partition wall 454 is formed as a plate with its thickness along the left-right direction. The fourth partition wall 454 protrudes rearward from the right wall of the first peripheral wall 455. A gap is formed between the fourth partition wall 454 and the rear wall 432 of the first water supply chamber 421. The gap between the fourth partition wall 454 and the rear wall 303 of the first water supply chamber 421 forms a water flow path. The fourth partition wall 454 protrudes downward from the upper cover 410.

[0088] In the first water supply chamber 421, water supplied through the first inlet 441 flows counterclockwise around the first circumferential wall 455 via the first partition wall 451, the second partition wall 452, the third partition wall 453, the fourth partition wall 454, the first circumferential wall 455, and the second circumferential wall 456 (see reference). Figure 14 (Arrow Y1). In addition, when the water level exceeds the height of the second circumferential wall 456, water flows into the second circumferential wall 456.

[0089] The second water supply chamber 422 is located above the third containment chamber 33. The top cover 410 has a second inlet 442. The second inlet 442 is cylindrical. The second inlet 442 protrudes rearward from the left side portion of the partition wall 433 of the rear wall 432 of the water supply chamber 42. The second inlet 442 is arranged horizontally with the first inlet 441 across the partition wall 433. The second inlet 442 is connected to a second nozzle. Water flows into the second water supply chamber 422 from the second nozzle through the second inlet 442. The water flowing into the second water supply chamber 422 is supplied to the third containment chamber 33 from above.

[0090] The top 41 also functions as the bottom of the first water supply chamber 421 and the second water supply chamber 422, and has an upper surface 411 for water to flow into the main body 3. The top 41 has a plurality of water supply holes 46 through which water supplied to the main body 3 passes in the vertical direction. Water is supplied to the main body 3 from above through the plurality of water supply holes 46.

[0091] The plurality of water supply holes 46 includes a plurality of first water supply holes 461, a plurality of second water supply holes 462, and a plurality of third water supply holes 463. The plurality of first water supply holes 461 are located above the first containment chamber 31 of the top 41. The plurality of second water supply holes 462 are located above the second containment chamber 32 of the top 41. The plurality of third water supply holes 463 are located above the third containment chamber 33 of the top 41.

[0092] In this embodiment, 11 first water supply holes 461 are formed at the top 41 as a plurality of first water supply holes 461. Four of the 11 first water supply holes 461 are arranged along the partition wall 433 from the corner where the partition wall 433 and the front wall 431 of the first water supply chamber 421 are continuous. Two of these four first water supply holes 461 are formed at a position closer to the rear than the first plate portion 4521 of the second partition wall 452. Furthermore, three of the 11 first water supply holes 461 are arranged along the front wall 431 of the first water supply holes 461 together with one first water supply hole 461 located at the corner where the partition wall 433 and the front wall 431 of the first water supply chamber 421 are continuous. Furthermore, two of the eleven first water supply holes 461 are arranged along the first plate portion 4521 between the front wall 431 of the first water supply hole 461 and the first plate portion 4521 of the second partition wall 452. Additionally, two of the eleven first water supply holes 461 are arranged in a front-to-back direction between the first plate portion 4521 of the second partition wall 452 and the first peripheral wall 455. These two first water supply holes 461, together with two of the five first water supply holes 461 formed between the front wall 431 of the first water supply chamber 421 and the first plate portion 4521 of the second partition wall 452, are arranged in a front-to-back direction, separated by the first plate portion 4521.

[0093] Furthermore, in this embodiment, 12 second water supply holes 462 are formed at the top 41 as a plurality of second water supply holes 462. Four of the 12 second water supply holes 462 are formed to be arranged in the front-back direction and the left-right direction between the first plate portion 4521 and the first peripheral wall 455 of the second partition wall 452. Furthermore, five of the 12 second water supply holes 462 are formed to be arranged in an L-shape between the second partition wall 452 and the front wall 431 and the right wall 435 of the first water supply chamber 421. Furthermore, three of the 12 second water supply holes 462 are formed to be arranged in an L-shape along the front wall 431 and the right wall 435 of the first water supply chamber 421.

[0094] Furthermore, in this embodiment, 12 third water supply holes 463 are formed on the top 41 as a plurality of third water supply holes 463. Nine of the twelve third water supply holes 463 are arranged in a U-shape along the left wall 436, front wall 431, and partition wall 433 of the second water supply chamber 422. Additionally, three of the twelve third water supply holes 463 are arranged along the left wall 436 of the second water supply chamber 422 from a continuous corner between the left wall 436 and the rear wall 432. Furthermore, in this embodiment, a drain hole 464 is formed on the top 41. The drain hole 464 is formed at a continuous corner between the rear wall 303 and the partition wall 433 of the second water supply chamber 422. The drain hole 464 is formed continuously through the outer side of the third receiving chamber 33 and the bottom cover 5 located below the main body 3.

[0095] Furthermore, the top 41 is separated from the plurality of water supply holes 46 by a plurality of large water supply holes 49, which allow water supplied to the main body 3 to pass through in the vertical direction. The opening area of ​​each large water supply hole 49 is larger than that of each water supply hole 46. In addition to the plurality of water supply holes 46, the main body 3 is also supplied with water from above through the plurality of large water supply holes 49.

[0096] Multiple large water supply holes 49 include a first large water supply hole 491, a second large water supply hole 492 and a third large water supply hole 493.

[0097] The first large water supply hole 491 is located above the first receiving chamber 31 of the top 41. The first large water supply hole 491 is formed on the inner side of the second peripheral wall 456 at the corner where the left wall 436 and the front wall 431 of the second peripheral wall 456 are continuous.

[0098] The second large water supply hole 492 and the third large water supply hole 493 are located above the second receiving chamber 32 of the top 41. The second large water supply hole 492 is formed between the front wall 431 of the first water supply chamber 421 and the first plate portion 4521 of the second partition wall 452, along the front wall 431 of the first water supply chamber 421. The third large water supply hole 493 is formed on the right side of the fourth partition wall 454.

[0099] Next, the opening shape of the multiple water supply holes 46 will be described.

[0100] In this embodiment, the opening shapes of the plurality of first water supply holes 461 and the opening shapes of the plurality of second water supply holes 462 and the plurality of third water supply holes 463 are different from each other. The opening shape of each of the plurality of second water supply holes 462 and the plurality of third water supply holes 463 is circular. In addition, the opening areas of the plurality of first water supply holes 461, the plurality of second water supply holes 462 and the plurality of third water supply holes 463 are the same.

[0101] On the other hand, such as Figure 15 and Figure 16As shown, the opening shape of each of the plurality of first water supply holes 461 is concave. In this embodiment, "concave shape" refers to a shape (concave figure) having at least one recess 47 that is recessed towards the inside of the opening (first water supply hole 461). In other words, a concave shape is a shape other than a convex shape (convex figure), and is a shape that includes the outer region of the opening on a straight line connecting any two points within the opening (first water supply hole 461). For example, in the first water supply hole 461, a straight line connecting two points on both sides of the recess 47 traverses the recess 47 in a direction orthogonal to the direction in which the recess 47 is recessed. Furthermore, for example, in the case where the concave shape is a polygon, the concave shape is a shape containing an interior angle of 180° or more and less than 360°.

[0102] In this embodiment, the opening shape of the first water supply hole 461 is a concave shape with multiple recesses 47. The multiple recesses 47 are a first recess 471, a second recess 472, and a third recess 473 that are recessed in different directions. The recessed dimension of the first recess 471 of the first water supply hole 461 is larger than the recessed dimensions of the second recess 472 and the third recess 473. In this embodiment, "recessed dimension" refers to the dimension from the base end to the front end of the recess 47 in the direction in which the recess 47 is recessed. Here, the direction in which the first recess 471 is recessed is designated as the first direction, and the direction intersecting the first direction is designated as the second direction. The second recess 472 is formed on one side of the second direction relative to the first recess 471, and the third recess 473 is formed on the other side of the second direction relative to the first recess 471. In this embodiment, the first recess 471, the second recess 472, and the third recess 473 are arranged at approximately 120-degree intervals at the center of the first water supply hole 461. Furthermore, the opening shape of the first water supply hole 461 is a linearly symmetrical shape with a straight line along a first direction as the axis, the first direction passing through the center of the first water supply hole 461.

[0103] The first water supply hole 461 narrows through the first recess 471, the second recess 472, and the third recess 473. In this embodiment, "narrowing" refers to a localized reduction in the width of the opening, with the narrowed portion widening on both sides. In this embodiment, the portions of the first water supply hole 461 where the first recess 471 and the second recess 472 are close together, and the portions where the first recess 471 and the third recess 473 are close together, are narrowed.

[0104] Furthermore, in this embodiment, the first recess 471, the second recess 472, and the third recess 473 are formed by curves. In other words, the edges of the first recess 471, the second recess 472, and the third recess 473 are curved. Moreover, in this embodiment, the periphery of the opening of the first water supply hole 461, which includes the first recess 471, the second recess 472, and the third recess 473, is formed by curves.

[0105] Furthermore, each of the plurality of first water supply holes 461 is formed such that the first recess 471, the second recess 472, and the third recess 473 are recessed in a direction different from the direction Y1 of the water flowing over the upper surface 411 of the top 41. Additionally, each of the plurality of first water supply holes 461 is formed such that the first recess 471 is recessed in the upstream direction of the water flowing over the upper surface 411 of the top 41. As described above, in the first water supply chamber 421, water flows counterclockwise around the first peripheral wall 455. Figure 14 As shown, in this embodiment, four of the eleven first water supply holes 461 along the partition wall 433 are formed as first recesses 471 that are recessed to the rear, and the remaining seven first water supply holes 461 are formed as first recesses 471 that are recessed to the left.

[0106] Furthermore, ribs 481 are formed on the outer periphery of each of the plurality of first water supply holes 461. The ribs 481 form upwards from the outer periphery of the first water supply hole 461. In this embodiment, ribs 481 are formed on the upper surface 411 of the top 41, but ribs forming downwards from the outer periphery of the first water supply hole 461 may also be formed on the lower surface of the top 41. Similarly, ribs 482 are formed on the outer periphery of the second water supply hole 462, and ribs 483 are formed on the outer periphery of the third water supply hole 463 (see reference). Figure 12 Rib 482 is formed to protrude upward from the outer periphery of the second water supply hole 462. Rib 483 is formed to protrude upward from the outer periphery of the third water supply hole 463.

[0107] In addition, such as Figure 16 As shown, the outer periphery of each of the plurality of first water supply holes 461 is chamfered. In this embodiment, the outer periphery of the first water supply hole 461 is chamfered by R-machining and bent. Alternatively, the outer periphery of the first water supply hole 461 can also be chamfered by C-machining. Similarly, the outer periphery of the second water supply hole 462 and the third water supply hole 463 is chamfered. In this embodiment, the outer periphery of the second water supply hole 462 and the third water supply hole 463 is chamfered by R-machining and bent. Alternatively, the outer periphery of the second water supply hole 462 and the third water supply hole 463 can also be chamfered by C-machining.

[0108] Next, the opening shape of the multiple large water supply holes 49 will be described.

[0109] like Figure 14 As shown, the opening shape of the first large water supply hole 491 is the same as that of the first water supply hole 461, but the opening area is larger than that of the first water supply hole 461. Furthermore, the outer periphery of the first large water supply hole 491 is chamfered. In this embodiment, the outer periphery of the first large water supply hole 491 is chamfered by R-machining and bent.

[0110] The opening shape of the second large water supply hole 492 is a rectangle with the left-right direction as its length. In addition, a rib 484 is formed on the outer periphery of the second large water supply hole 492. The rib 484 is formed to protrude upward from the outer periphery of the second large water supply hole 492.

[0111] The opening shape of the third large water supply hole 493 is a rectangle with the front-to-back direction as its length. Furthermore, the outer periphery of the third large water supply hole 493 is chamfered. In this embodiment, the outer periphery of the third large water supply hole 493 is chamfered by R-machining and bent. Alternatively, the outer periphery of the third large water supply hole 493 can also be chamfered by C-machining.

[0112] Next, the water supply operation of the housing 2 in this embodiment from the water supply section 4 to the main body section 3 will be explained. Here, the case in which powdered detergent is contained in the first containment chamber 31 and water is supplied from the first water supply chamber 421 to the first containment chamber 31 will be explained.

[0113] As described above, water flowing into the first water supply chamber 421 through the first inlet 441 flows counterclockwise around the first peripheral wall 455. Around the first peripheral wall 455, a plurality of first water supply holes 461 are formed in the portion above the first receiving chamber 31. Therefore, a portion of the water flowing on the upper surface of the top 41 flows down into the first receiving chamber 31 through the plurality of first water supply holes 461.

[0114] Here, as Figure 15 As shown, the opening shape of the first water supply hole 461 is a concave shape with three recesses 47 (first recess 471, second recess 472, and third recess 473), and it narrows. In other words, the opening shape of the first water supply hole 461 is a continuous shape with a large opening area and a small opening area.

[0115] In the portion with a large opening area, the length of the wet edge is shorter relative to the opening area, resulting in lower viscous resistance on the wall, allowing water to pass through easily. Conversely, in the portion with a small opening area, the length of the wet edge is longer relative to the opening area, resulting in higher viscous resistance on the wall, making it difficult for water to pass through. Therefore, water passes quickly from the portion with the small opening area to the portion with the large opening area. In other words, water passes slightly later from the portion with the small opening area to the portion with the large opening area. Consequently, uneven pressure is created on the surface of the water flowing down from the first water supply hole 461. Specifically, the pressure in the portion with the small opening area is lower than the pressure in the portion with the large opening area. As a result, when water flows down from the first water supply hole 461, air is drawn in from the portion with the small opening area, forcing air into the water. Therefore, when water flows down from the first water supply hole 461, the water flow is interrupted by the drawn air and forms multiple droplets due to surface tension.

[0116] In this way, the water flowing down from the first water supply hole 461 is supplied as multiple water droplets to the first receiving chamber 31. These multiple water droplets then sequentially impact the powdered detergent contained in the first receiving chamber 31. Furthermore, the multiple water droplets disintegrate upon impact with the powdered detergent. Therefore, the collision of multiple water droplets with the powdered detergent imparts greater impact energy to the powdered detergent compared to the collision of a continuous stream of water with the powdered detergent. Consequently, since the powdered detergent particles easily disintegrate and dissolve in water, the residual dissolved powdered detergent in the housing 2 can be suppressed.

[0117] Furthermore, since the opening of the first water supply hole 461 is concave, water flows more easily through it compared to a circular opening. Therefore, the water supply efficiency from the first water supply chamber 421 to the first receiving chamber 31 is improved, and the amount of water supplied to the first receiving chamber 31 is increased. This further suppresses the dissolution and residue of powdered detergent in the housing 2.

[0118] As described above, in this embodiment, for example, even when the tap water pressure is low and the amount of water supplied to the first water supply chamber 421 per unit time is small, the powder detergent in the first containment chamber 31 can be dissolved efficiently, and the dissolution residue of the powder detergent in the housing 2 can be suppressed.

[0119] Furthermore, multiple first water supply holes 461 are formed along the wall of the first receiving chamber 31. Therefore, residual powder detergent near the wall of the first receiving chamber 31 can be suppressed.

[0120] Furthermore, each of the first recesses 471 of the plurality of first water supply holes 461 is oriented towards the upstream direction of the water flowing on the upper surface of the top 41 (see reference). Figure 14 The first water supply hole 461 is formed in a recessed manner (arrow Y1). Water flowing down from the first water supply hole 461 is directed in the opposite direction to the recess 47 due to the viscous resistance and surface tension of the wall surface of the first water supply hole 461. Therefore, the direction of the water flowing down from the first water supply hole 461 can be corrected so that it is directed directly downwards relative to the direction of water flowing over the upper surface. Furthermore, in this embodiment, the first recess 471 has the largest recess size among the multiple recesses 47. This makes it easier to direct the water flowing down from the first water supply hole 461 more directly downwards, reducing the amount of non-aquatic powder detergent and further suppressing the dissolution and residue of powder detergent in the housing 2.

[0121] Furthermore, ribs 481 are formed on the outer periphery of the first water supply hole 461. The ribs 481 reduce the flow of water above the first water supply hole 461. As a result, the water flowing down from the first water supply hole 461 is more likely to flow directly downwards, which can reduce the amount of non-aquatic powder detergent, and thus further suppress the dissolution and residue of powder detergent in the housing 2.

[0122] Furthermore, the periphery of the opening of the first water supply hole 461 is formed by a curve. This allows water flowing from the first water supply hole 461 to easily form multiple droplets, thus suppressing the dissolution and residue of powdered detergent in the housing 2. Alternatively, at least a portion of the periphery of the opening of the first water supply hole 461 can also be formed by a straight line.

[0123] Furthermore, the outer periphery of the first water supply hole 461 is chamfered. As a result, water can easily flow into the first water supply hole 461, which can improve the water supply efficiency to the first containment chamber 31.

[0124] Furthermore, on the outer side of the first peripheral wall 455 of the first water supply chamber 421, in addition to multiple first water supply holes 461, multiple second water supply holes 462, second large water supply holes 492, and third large water supply holes 493 are also formed. Therefore, the water flowing around the first peripheral wall 455, in addition to the first receiving chamber 31, also flows to the second receiving chamber 32 through the multiple second water supply holes 462, second large water supply holes 492, and third large water supply holes 493. In other words, the water flowing into the first water supply chamber 421 is supplied to both the first receiving chamber 31 and the second receiving chamber 32.

[0125] Furthermore, since a large amount of water flows into the first water supply chamber 421, and the water level flowing around the first peripheral wall 455 exceeds the height of the second peripheral wall 456, water flows into the inner side of the second peripheral wall 456. A first large water supply hole 491 is formed on the inner side of the second peripheral wall 456.

[0126] A first large water supply hole 491 is formed above the first water supply hole 461. Therefore, water flowing into the inner side of the second peripheral wall 456 flows down through the first large water supply hole 491 to the first water supply chamber 421. The opening shape of the first large water supply hole 491 is the same as that of the first water supply hole 461. Therefore, similarly to the first water supply hole 461, the water flowing down from the first large water supply hole 491 is supplied to the first receiving chamber 31 as multiple water droplets. As a result, the powdered detergent easily dissolves in water due to its fragmented structure, thus suppressing the dissolution and residue of powdered detergent in the housing 2. Furthermore, since the opening shape of the first large water supply hole 491 is concave, water flows down more easily through it compared to a circular opening.

[0127] Next, the flow of water supplied from the first water supply chamber 421 to the first containment chamber 31 will be explained.

[0128] As described above, water is supplied to the first containment chamber 31 by flowing down from the first water supply chamber 421 located above the first containment chamber 31. The first bottom 311 of the first containment chamber 31 is formed such that the front end 312 of the first upper surface 314 is positioned above the rear end 313. Therefore, the water supplied to the first containment chamber 31 flows rearward along the first upper surface 314. Moreover, the water flowing rearward along the first upper surface 314 flows down through the rear opening of the first containment chamber 31. The water flowing down from the first containment chamber 31 flows forward along the bottom plate portion 51 of the bottom cover 5 and is poured into the washing tank 13.

[0129] Here, as Figures 5 to 11 As shown, in this embodiment, the first upper surface 314 of the first receiving chamber 31 is entirely an inclined portion 315, and it continuously varies in a manner that the first slope in the front-to-back direction repeatedly increases and decreases. That is, the inclined portion 315 is formed in a wave shape with repeated increases and decreases in height in the front-to-back direction. Therefore, compared with a configuration where the slope in the front-to-back direction is fixed, the inclined portion 315 includes a portion with a large slope in the front-to-back direction (steep slope portion). Therefore, when water flows in the steep slope portion, the flow velocity increases, thereby suppressing the residue of powdered detergent contained in the first receiving chamber 31. Furthermore, since the first slope continuously varies, the water flow can be stabilized, thereby further suppressing the residue of powdered detergent in the first receiving chamber 31.

[0130] Furthermore, in this embodiment, the inclined portion 315 continuously changes by repeatedly increasing and decreasing the second slope in the left and right directions. That is, the inclined portion 315 is formed as a wave shape with repeated increases and decreases in height in the left and right directions. Therefore, in this embodiment, water flows not only in the front-back direction but also in the left-right direction. As a result, the water flowing down from the first water supply chamber 421 flows in a manner that expands in both the front-back and left-right directions, thus suppressing the residue of powder detergent in the first receiving chamber 31. In addition, by repeatedly increasing and decreasing the second slope, the flow velocity of water in the left-right direction can be increased, further suppressing the residue of powder detergent in the first receiving chamber 31.

[0131] Furthermore, in this embodiment, due to the variation between the first slope in the front-to-back direction and the second slope in the left-to-right direction, the water flow velocity at different locations in the left-to-right direction at the outlet 313 of the first receiving chamber 31 is prone to differ. Consequently, the viscous resistance at the rear end 313 of the first receiving chamber 31 decreases, allowing water to flow out of the first receiving chamber 31 more easily. Therefore, the collision energy when the water flowing out of the first receiving chamber 31 collides with the bottom cover 5 increases, making it easier for the powdered detergent to dissolve in the water.

[0132] Furthermore, the inclined portion 315 is formed such that, in the left-right direction, the polarity change interval on the rear end portion 313 side is narrower than the polarity change interval on the front end portion 312 side. That is, in the inclined portion 315 of this embodiment, the interval between valleys in the left-right direction becomes shorter as it moves towards the rear end portion 313 side. As a result, in the inclined portion 315, the water flow path narrows as it moves towards the rear end portion 313 side, which is the downstream side, thus increasing the water flow rate. Therefore, it is possible to further suppress powder detergent residue in the first containment chamber 31. Moreover, in the inclined portion 315 of this embodiment, the average deviation value on the rear end portion 313 side is smaller than the average deviation value on the front end portion 312 side. The average deviation value refers to the average distance between the central portion of the inclined portion 315 and each of the multiple polarity change lines Lx in the left-right direction. In other words, in the inclined portion 315 of this embodiment, the water flow path narrows as it moves towards the rear end portion 313 side, which is the downstream side, in a manner that approaches the central portion in the left-right direction. Therefore, at the rear end 313 of the inclined portion 315, the distance to the part furthest from the valley where water flows easily can be shortened, thus suppressing the residue of powder detergent in the first containment chamber 31.

[0133] Additionally, water flowing into the first water supply chamber 421 is also supplied to the second containment chamber 32. If the water level in the second containment chamber 32 exceeds the upper end of the second cylindrical portion 322, the water in the second containment chamber 32 is discharged downwards through the interior of the second cylindrical portion 322 via a siphon principle. The water discharged from the second containment chamber 32 flows forward along the bottom plate portion 51 of the bottom cover 5 and is then fed into the washing tank 13.

[0134] (Modified Example)

[0135] Next, variations of the first water supply chamber 421 and the first containment chamber 31 will be described. The variations described below can be appropriately combined with the above-described embodiments or variations. Furthermore, in the following description, the same reference numerals are used for items identical to those described in the above embodiments, and descriptions are omitted as appropriate.

[0136] (First variation)

[0137] In the above example, each of the plurality of first water supply holes 461 is formed as a first recess 471 that is recessed in the direction upstream of the water flowing on the upper surface of the top 41. That is, the plurality of first water supply holes 461 includes first water supply holes 461 with the first recess 471 formed in the rearward direction and first water supply holes 461 with the first recess 471 formed in the leftward direction, but is not limited to this configuration. The plurality of first water supply holes 461 may also be formed as first recesses 471 that are recessed in the same direction (e.g., rearward).

[0138] Furthermore, in the example above, the first water supply hole 461 is formed as three recesses 47 (first recess 471, second recess 472 and third recess 473). The recess size of the first recess 471 is larger than the recess sizes of the second recess 472 and the third recess 473, but the recess sizes of the three recesses 47 can also be the same.

[0139] (Second variation)

[0140] In the above example, the opening shape of the first water supply hole 461 is a concave shape with three recesses 47 (first recess 471, second recess 472, and third recess 473), but it is not limited to this shape; any concave shape with at least one recess 47 is acceptable. For example, the opening shape of the first water supply hole 461 could also be... Figures 17A to 17D The shape shown.

[0141] Figure 17A The opening shape of the first water supply hole 461A shown is a shape in which a portion of three circles arranged at approximately 120-degree intervals around the center of a circle overlaps, and is a concave shape with three recesses 47. Figure 17B The opening shape of the first water supply hole 461B shown is the shape of two circles of different sizes overlapping each other in a straight line at the center of the circle, and is a concave shape with two recesses 47. Figure 17C The opening shape of the first water supply hole 461C shown is so-called heart-shaped, which is a concave shape with a recess 47. Figure 17D The opening shape of the first water supply hole 461D shown is the shape of the outline of a character such as "A", and it is a concave shape with a recess 47.

[0142] (Third variation)

[0143] Reference Figures 18-21 Explain the first containment chamber 31 of the third variant. Figure 18 This is a top view of the first containment chamber 31 of the third variant. Figure 19 yes Figure 18 GG cross-sectional view, Figure 20 yes Figure 18 HH cross-sectional diagram, Figure 21 yes Figure 18 Section II view.

[0144] Figures 18-21 As shown, the difference between the inclined portion 315A of the first receiving chamber 31 in this modified example and the inclined portion 315 of the above embodiment is that the inclined portion 315A is a descending slope that separates from the position directly below the first large water supply hole 491 formed in the first water supply chamber 421 in the left and right directions.

[0145] The first large water supply hole 491 is located in the center of the first containment chamber 31 in the front-rear direction and above the right end. The first large water supply hole 491 has a larger opening area than each of the plurality of first water supply holes 461. Therefore, the amount of water flowing down through the first large water supply hole 491 is greater than the amount of water flowing down through the first water supply holes 461.

[0146] In the inclined portion 315A of this modification, a downward slope is formed in the left-right direction starting from a position directly below the first large water supply hole 491. Therefore, in this modification, the flow rate of the large volume of water flowing down from the first large water supply hole 491 can be further increased. Consequently, the residue of powdered detergent contained in the first receiving chamber 31 can be suppressed.

[0147] In addition, such as Figure 20 as well as Figure 21 As shown, the inclined portion 315A is a downward slope that descends in the front-to-back direction from the front end portion 312 side towards the rear end portion 313 side. That is, the inclined portion 315A does not include an upward slope in the front-to-back direction. As a result, residues of powder detergent and water can be suppressed.

[0148] (Fourth variation)

[0149] In the inclined portion 315 of the first receiving chamber 31 in the above embodiment, as Figures 5 to 11 As shown, the water flow path narrows towards the rear end 313, which is the downstream side, but is not limited to this.

[0150] Reference Figures 22-26 Explain the first containment chamber 31 of the fourth variation. Figure 22 This is a top view of the first containment chamber 31 of the fourth variant. Figure 23 yes Figure 22 JJ cross-section diagram, Figure 24 yes Figure 22 KK cross-sectional diagram, Figure 25 yes Figure 22 LL cross-sectional view, Figure 26 yes Figure 22 MM cross-sectional view.

[0151] Figures 22-26 As shown, in this modified example, the inclined portion 315B of the first receiving chamber 31 is formed such that the water flow path, i.e., the valley, branches into two parts. In the inclined portion 315B, as it moves towards the rear end portion 313, which is the downstream side, the water flow path branches into two parts near the two ends in the left-right direction. Thus, in this modified example, two water flow paths are formed at the rear end portion 313 of the first receiving chamber 31, thereby suppressing the residue of powder detergent in the rear end portion 313 of the first receiving chamber 31.

[0152] (Summarize)

[0153] The first type of housing 2 houses detergent that is added to the washing tub 13 of the washing machine 1. The housing 2 includes a main body 3 and a water supply section 4. The main body 3 has a first bottom 311 for receiving detergent. The water supply section 4 supplies water to the main body 3. The first bottom 311 has a first upper surface 314 formed such that one end (front end 312) in a first direction (front-rear direction) is positioned higher than the other end (rear end 313). The first upper surface 314 includes an inclined portion 315 (315A, 315B) that varies in the first direction with a first slope representing the ratio of the distance in the vertical direction to the distance in the first direction.

[0154] In the second type of housing 2, in the first type, the inclined portion 315 (315B) continuously changes in a manner that the first slope repeatedly increases and decreases in the first direction.

[0155] In the third-type housing 2, in either the first or second mode, the inclined portion 315 (315A, 315B) changes its second slope in the second direction (left-right direction) intersecting the first direction, which represents the ratio of the distance in the up-down direction to the distance in the second direction.

[0156] In the fourth embodiment of the housing 2, in the third embodiment, the inclined portions 315 (315A, 315B) vary by repeatedly increasing and decreasing the second slope in the second direction. The interval between multiple polarity change points of the polarity change of the second slope in the second direction is defined as the polarity change interval. The inclined portions 315 are formed such that the polarity change interval on one end side is narrower than the polarity change interval on the other end side.

[0157] In the fifth embodiment of the housing 2, in the fourth embodiment, the average distance between each of the multiple polarity change points of the polarity change of the center of the first upper surface 314 and the second slope in the second direction is taken as the average deviation value. The inclined portion 315 (315A, 315B) is formed in such a way that the average deviation value of the other end side is less than the average deviation value of the first end side.

[0158] In the sixth type of housing 2, in any of the first to fifth types, the inclined section 315A is a descending ramp that descends in the first direction from one end side to the other end side.

[0159] In the seventh embodiment of the housing 2, in any of the first to sixth embodiments, the water supply section 4 has a plurality of first water supply holes 461 (461A to 461D) and a first large water supply hole 491. Water flows vertically toward the main body 3 through the plurality of first water supply holes 461 (461A to 461D). The first large water supply hole 491 has a larger opening area than each of the plurality of first water supply holes 461 (461A to 461D), allowing water to pass through in the vertical direction. The inclined section 315A is a descending slope that separates in the second direction from a position directly below the first large water supply hole 491 in a second direction intersecting the first direction.

[0160] The washing machine 1 of the eighth type has a housing 2 of any one of the first to seventh types and a washing tub 13 into which the detergent contained in the housing 2 is added together with water.

[0161] The ninth type of housing 2 houses the detergent dispensed into the washing tub 13 of the washing machine 1. The housing 2 includes a main body 3 and a water supply section 4. The main body 3 has an opening at the top to receive the detergent. The water supply section 4 has a top 41 covering the top of the main body 3. The top 41 has an upper surface 411 for water to flow into the main body 3 and is formed with a plurality of first water supply holes 461 (461A to 461D) for water to pass through in the vertical direction. At least one of the plurality of first water supply holes 461 (461A to 461D) has a concave shape having at least one recess 47 recessed towards the inner side of the first water supply hole 461 (461A to 461D).

[0162] In the housing 2 of the tenth embodiment, in the ninth embodiment, the opening shape of at least one first water supply hole 461 (461A to 461D) is narrowed by at least one recess 47.

[0163] In the eleventh type of housing 2, in the ninth or tenth type, at least one recess 47 is formed by a curve.

[0164] In the housing 2 of the twelfth type, in any of the ninth to eleventh types, the periphery of the opening of at least one first water supply hole 461 (461A to 461D) is formed by a curve.

[0165] In the housing 2 of the thirteenth type, in any of the ninth to twelfth types, at least one recess 47 is recessed in a direction different from the direction of water flowing on the upper surface 411 of the top plate portion 41.

[0166] In the housing 2 of the fourteenth embodiment, in any of the ninth to thirteenth embodiments, at least one recess 47 includes a plurality of recesses 47. The opening shape of at least one first water supply hole 461 is a concave shape having a plurality of recesses 47.

[0167] In the housing 2 of the fifteenth embodiment, in the fourteenth embodiment, the plurality of recesses 47 are a first recess 471, a second recess 472, and a third recess 473 that are recessed in mutually different directions. The first recess 471 is formed in a manner that it is recessed in a first direction. The second recess 472 is formed on one side of a second direction that intersects the first direction relative to the first recess 471. The third recess 473 is formed on the other side of the second direction relative to the first recess 471.

[0168] In the sixteenth embodiment of the housing 2, and in the fifteenth embodiment, the first recess 471 is formed to be recessed upstream of the water flowing on the upper surface 411 of the top 41.

[0169] In the seventeenth embodiment of the housing 2, in any of the ninth to sixteenth embodiments, the top 41 is further provided with a first large water supply hole 491 through which water passes in a vertical direction. The opening area of ​​the first large water supply hole 491 is larger than the opening area of ​​at least one first water supply hole 461.

[0170] In the housing 2 of the eighteenth embodiment, in the seventeenth embodiment, the opening shape of the first large water supply hole 491 is the same as the opening shape of at least one first water supply hole 461.

[0171] In the nineteenth embodiment of the housing 2, in any of the ninth to eighteenth embodiments, the water supply section 4 further has at least one rib 481 that protrudes upward from the outer periphery of at least one first water supply hole 461 (461A to 461D).

[0172] In the housing 2 of the twentieth type, in any of the ninth to nineteenth types, the outer periphery of at least one first water supply hole 461 (461A to 461D) is chamfered.

[0173] The washing machine 1 of the twenty-first type includes a housing 2 of any one of the ninth to twentieth types and a washing tub 13 into which the detergent contained in the housing 2 is added along with water.

[0174] Furthermore, this invention includes a technical concept focusing on the shape of the mouth of a needle-like toe. Additionally, this invention includes a technical concept focusing on the shape of an ovary resembling a rhombus symbol. In other words, this disclosure relates to biology.

Claims

1. A housing for containing detergent dispensed into the washing tub of a washing machine, characterized in that, The enclosure includes: The main body has a bottom for receiving the detergent; and The water supply unit supplies water to the main body. The bottom has an upper surface formed such that one end is positioned above the other end in a first direction. The upper surface includes an inclined portion where a first slope, representing the ratio of the distance in the vertical direction to the distance in the first direction, varies in the first direction. The inclined portion includes: In the first direction, the first ramp increases in the downward direction as it moves from one end toward the other end in the first direction; and The maximum value is achieved in the second direction, which intersects the first direction, where the slope continuously changes from uphill to downhill. The increase includes the maximum value.

2. The housing according to claim 1, characterized in that, The inclined portion varies in such a way that at least one of the first slope increases and decreases in the first direction.

3. The housing according to claim 1 or 2, characterized in that, The inclined portion changes continuously in a manner that the first slope repeatedly increases and decreases in the first direction.

4. The housing according to claim 1 or 2, characterized in that, The inclined portion represents a second slope change in the second direction intersecting the first direction, which represents the ratio of the distance in the vertical direction to the distance in the second direction.

5. The housing according to claim 4, characterized in that, The inclined portion varies by repeatedly increasing and decreasing the second slope in the second direction. The interval between multiple polarity change points of the second slope in the second direction is defined as the polarity change interval. The inclined portion is formed such that the polarity change interval on the other end side is narrower than the polarity change interval on the one end side.

6. The housing according to claim 5, characterized in that, The average distance between the respective points of polarity change of the center of the upper surface and the second slope in the second direction is set as the average deviation value. The inclined portion is formed such that the average deviation value of the other end side is less than the average deviation value of the first end side.

7. The housing according to claim 1 or 2, characterized in that, The inclined section is a descending slope that descends in the first direction from one end side toward the other end side.

8. A housing for containing detergent dispensed into the washing tub of a washing machine, characterized in that, It includes: The main body has a bottom for receiving the detergent. as well as The water supply unit supplies water to the main body. The water supply unit has: Multiple water supply holes through which water flows vertically toward the main body; as well as The large water supply hole has an opening area larger than that of each of the plurality of water supply holes, and allows water to pass through in the vertical direction. The bottom has an upper surface formed such that one end is positioned above the other end in a first direction. The upper surface includes an inclined portion where a first slope, representing the ratio of the distance in the vertical direction to the distance in the first direction, varies in the first direction. The inclined portion, in a second direction intersecting the first direction, includes three or more portions where the ratio of the distance in the vertical direction to the distance in the second direction increases or decreases due to a second slope. The second slope is a descending slope in the second direction that moves away from the position directly below the large water supply hole along the second direction.

9. The housing according to claim 8, characterized in that, The inclined portion changes in a manner that the second slope repeatedly increases and decreases in the second direction.

10. The housing according to claim 9, characterized in that, The interval between multiple polarity change points of the second slope in the second direction is defined as the polarity change interval. The inclined portion is formed such that the polarity change interval on the other end side is narrower than the polarity change interval on the one end side.

11. A washing machine, characterized in that, It possesses: The housing according to any one of claims 1 to 10, and A washing tank in which the washing agent contained in the tank is added together with water.

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