washing machine

Abstract

A washing machine comprises: a washing and dehydrating barrel (2) having a pulsator (4) disposed at its bottom (2c); a circulation passage (8) disposed on the inner circumference (2a) of the washing and dehydrating barrel (2), allowing washing water stirred by the lower blade portion (4c) of the pulsator (4) to pass through the circulation passage (8) toward the upper end of the washing and dehydrating barrel (2) and be discharged from a circulation water port (8a); three water injection portions (10) disposed on the inner circumference (2a) of the washing and dehydrating barrel (2), independently of the circulation passage (8) and arranged at equal intervals along the circumferential direction; and a water injection device (30) capable of injecting adjustment water into each water injection portion (10) individually. The washing machine can inject water to eliminate the imbalance of the washing and dehydrating barrel during the dehydration process, and can discharge sufficient washing water from the circulation water port for washing during the cleaning process.

Description

Technical Field

[0001] The invention relates to a washing machine which can eliminate the imbalance of a washing and dehydrating barrel while keeping the barrel rotating, and suppress vibration and noise caused by eccentricity of the washing and dehydrating barrel during dehydration. Background Art

[0002] A washing machine has long had baffles arranged at equal intervals along the circumference of the inner circumference of a washing and dehydrating tub (see, for example, Patent Document 1). Each baffle extends vertically from the bottom to the upper end of the washing and dehydrating tub. An opening is formed at the lower end of the baffle, opening near the bottom of the tub, and a circulating water inlet is formed at the upper end of the baffle. Therefore, during the washing process, washing water stirred by the lower blades of the impeller enters through the opening, flows upward within the baffle, and is discharged from the circulating water inlet, washing the clothes.

[0003] In washing machines, the spin cycle typically follows the wash cycle. However, if the laundry is significantly skewed during spin, the eccentricity of the washing and dehydrating tub increases during rotation, requiring a large torque for rotation and thus preventing the spin cycle from starting. Therefore, Patent Document 1 discloses a technology that detects the amount and position of imbalance within the washing and dehydrating tub during spin. If imbalance exists, water is injected into a plurality of baffles evenly spaced around the circumference of the tub to proactively correct the imbalance.

[0004] The washing machine disclosed in Patent Document 1 is configured such that a nozzle unit is positioned above the baffle. When water is poured into the baffle, regulated water injected from the nozzle unit flows into the baffle via a connecting member connected to the upper end of the baffle. Specifically, during the wash cycle, the baffle serves as a circulation path for wash water, while during the spin cycle, the baffle serves as a reservoir for regulated water to eliminate imbalances in the wash and spin tub. In this way, the same space within the baffle serves as both the circulation path and the reservoir, with the internal space at the upper end of the baffle branching into a space connected to the circulating water inlet and a space connected to the nozzle unit.

[0005] Therefore, in the washing machine of Patent Document 1, when a baffle is used as a circulation path for washing water during the washing process, washing water entering through the opening at the lower end of the baffle ascends within the baffle. When this washing water is discharged from the circulating water port, a portion of the washing water that has ascended within the baffle enters the space at the upper end of the baffle that is connected to the nozzle unit. Consequently, there is a problem in that the washing water that has ascended within the baffle cannot be fully discharged from the circulating water port, and sufficient washing water cannot be discharged from the circulating water port. Furthermore, since the same space within the baffle serves as both the circulation path and the water storage portion, if the height of the circulating water port at the upper end of the baffle is lowered, the dehydrated laundry may become wet when water is discharged from the baffle at the end of dehydration.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 2017-56025 Summary of the Invention

[0009] Problems to be solved by the invention

[0010] Therefore, the present invention can provide a washing machine, which can eliminate the unbalanced state of the washing and dehydrating barrel by filling water during the dehydration process, and can spit out sufficient washing water from the circulating water port for washing during the cleaning process.

[0011] Solutions for solving problems

[0012] The washing machine of the present invention is characterized in that it comprises: a washing and dehydrating barrel having a pulsator arranged at the bottom thereof; a circulation passage arranged on the inner circumferential surface of the washing and dehydrating barrel, so that the washing water stirred by the lower blade portion of the pulsator passes through the circulation passage toward the upper end portion of the washing and dehydrating barrel and is discharged from the circulation water outlet; three or more water injection parts arranged on the inner circumferential surface of the washing and dehydrating barrel, independently of the circulation passage, and arranged at equal intervals in the circumferential direction; and a water injection device capable of individually injecting adjustment water into each water injection part.

[0013] In the washing machine of the present invention, it is preferable that the water injection device injects the adjusted water into each water injection part via a water injection nozzle connected to an outer peripheral side of each water injection part.

[0014] In the washing machine of the present invention, preferably, the water filling portion includes two first water storage portions arranged on both sides of the circulation passage, and a second water storage portion connecting upper ends of the two first water storage portions.

[0015] The washing machine of the present invention preferably includes a storage member provided between the first water storage part and the second water storage part, the storage member having an inlet disposed on an inner peripheral side thereof and a rib disposed on an outer peripheral side of the inlet.

[0016] In the washing machine of the present invention, preferably, the water injection portion includes a connection portion connecting middle portions in a height direction of the two first water storage portions.

[0017] Effects of the Invention

[0018] According to the present invention, a washing water circulation path for washing during the cleaning process and a water storage portion for adjusting the water balance during the dehydration process are separately provided. Thus, the washing water balance can be balanced by filling water during the dehydration process, and sufficient washing water can be dispensed from the circulating water inlet of the circulation path for washing during the cleaning process. Furthermore, the height of the circulating water inlet of the circulation path can be freely designed.

[0019] According to the present invention, the protrusion in the washing and dehydrating tub can be eliminated, and the elliptical deformation of the washing and dehydrating tub during the dehydration process after water is poured into the water pouring part can be reduced.

[0020] According to the present invention, the water inlet for injecting water into the water injection part can be set to one, which can reduce the situation in which the washing and dehydrating barrel is elliptical deformed during the dehydration process after water is injected into the water injection part.

[0021] According to the present invention, one water inlet for injecting water into the water injection part can be provided, and water can be injected equally into the two first water storage parts.

[0022] According to the present invention, a single water inlet port can be provided for the water inlet portion. Even if water is unevenly filled into the two first water storage portions, water can be moved through the connection portion to make the water amounts in the two first water storage portions uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a perspective view showing the appearance of washing machine 1 according to the embodiment of the present invention.

[0024] Figure 2 Yes Figure 1 Schematic diagram of the structure of a washing machine 1.

[0025] Figure 3 yes Figure 1 A longitudinal sectional view of the washing and dehydration tub 2 of the washing machine 1 is shown.

[0026] Figure 4 yes Figure 3 A horizontal cross-sectional view of the washing and dehydrating tub 2 at line a1-a1.

[0027] Figure 5 yes Figure 3 A horizontal cross-sectional view of the washing and dehydrating tub 2 at line a2-a2.

[0028] Figure 6 yes Figure 3 A horizontal cross-sectional view of the washing and dehydrating tub 2 at line a3-a3.

[0029] Figure 7 (a) is a schematic diagram illustrating the flow of the adjustment water injected into the water injection unit 10. Figure 7 (b) is Figure 7 The cross-sectional view at line a1-a1 of (a) is as follows: Figure 7 (c) is Figure 7 Cross-sectional view at line a2-a2 of (a).

[0030] Figure 8 (a) is a diagram showing the comb-shaped ribs 11T disposed at the upper end of the first water storage portion 11 as viewed from above. Figure 8 (b) is Figure 8 Schematic diagram of the local cross section at line a-a in (a).

[0031] Description of Reference Numerals

[0032] 1: washing machine; 2: washing / spinning tub; 2a: inner circumference of washing / spinning tub; 2c: bottom of washing / spinning tub; 4: impeller; 4c: lower blade portion; 6: deflector; 8: circulation passage; 8a: circulating water inlet; 10: water injection portion; 11: first water storage portion; 11a: inlet; 11A: rib; 11T: comb-shaped rib (storage component); 12: second water storage portion; 16: connecting portion; 30: water injection device; 30a: water injection nozzle. DETAILED DESCRIPTION

[0033] Hereinafter, a washing machine 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0034] Figure 1 1 is a perspective view showing the appearance of a vertical washing machine (hereinafter referred to as a "washing machine") 1 according to an embodiment of the present invention. Figure 2 It is a schematic diagram showing the structure of the washing machine 1 according to the present embodiment.

[0035] The washing machine 1 of this embodiment includes a washing machine body 1 a , a washing and dehydrating tub 2 , an outer tub 3 , a water injection device 30 , and a driving unit 50 .

[0036] Figure 1 The washing machine body 1a is in the shape of a rectangular parallelepiped. An opening 11 for feeding laundry into the washing and dehydrating tub 2 is formed on the upper surface of the washing machine body 1a, and an opening and closing cover 11a for opening and closing the opening 11 is provided.

[0037] The outer tub 3 is a bottomed cylindrical member disposed inside the washing machine body 1a, and can store washing water inside. A drainage pipe 3n is connected to the bottom surface of the outer tub 3. Figure 2 Shown, the acceleration sensor 58 that can detect the acceleration of horizontal and vertical two directions is equipped with at the peripheral surface 3a of outer tub 3. In the present embodiment, detect the acceleration of outer tub 3 by acceleration sensor 58, and the acceleration of washing-dehydrating bucket 2 is set to be roughly the same with the acceleration of outer tub 3.

[0038] The washing and dehydrating tub 2 is a bottomed cylindrical member coaxially arranged and rotatably supported within the outer tub 3. The washing and dehydrating tub 2 can accommodate laundry and has a plurality of water holes 2t on its inner circumference 2a.

[0039] A freely rotating impeller (stirring wing) 4 is provided at the center of the bottom 2c of the washing and dehydrating tub 2. Figure 2 As shown, the pulsator 4 includes a substantially disc-shaped pulsator body 4a, a plurality of upper blades 4b formed on the upper surface of the pulsator body 4a, and a plurality of lower blades 4c formed on the lower surface of the pulsator body 4a. Such a pulsator 4 stirs the washing water stored in the outer tub 3 to generate a water flow.

[0040] Figure 2 The drive unit 50 shown uses a motor 51 to rotate a pulley 52 and a transmission belt 53, which in turn rotates a drive shaft 54 ​​extending toward the bottom 2c of the spin tub 2, providing driving force for the spin tub 2 and the pulsator 4, causing them to rotate. During the wash cycle, the washing machine 1 primarily rotates the pulsator 4. During the spin cycle, the spin tub 2 and the pulsator 4 rotate together at high speed. Furthermore, a proximity switch 55 is provided near one of the pulleys 53 to detect the passage of a mark 52a formed on the pulley 52.

[0041] Figure 3 It is a longitudinal sectional view of the washing and dehydrating tub 2 of the washing machine 1 according to the present embodiment. Figure 4 yes Figure 3 A horizontal cross-sectional view of the washing and dehydrating barrel 2 at the a1-a1 line, Figure 5 yes Figure 3 A horizontal cross-sectional view of the washing and dehydrating barrel 2 at line a2-a2, Figure 6 yes Figure 3 A horizontal cross-sectional view of the washing and dehydrating tub 2 at line a3-a3.

[0042] like Figure 3 and Figure 4As shown, three baffles 6 are provided at equal intervals (at equal angles) along the circumferential direction on the inner circumferential surface 2a of the washing and dehydrating barrel 2. Each baffle 6 is formed to extend in the vertical direction from the bottom 2c to the upper end of the washing and dehydrating barrel 2, and protrude from the inner circumferential surface 2a of the washing and dehydrating barrel 2 toward the axis S1. Moreover, each baffle 6 is hollow and has an arc-shaped cross-section.

[0043] Each baffle 6 includes a circulation passage 8, through which wash water stirred by the lower blade portion 4c of the pulsator 4 is passed toward the upper end of the washing and dehydration tub 2 during the washing process and discharged from the circulating water port 8a; and a water injection portion 10 for adjusting water, which is used to eliminate the imbalance of the washing and dehydration tub 2 during the dehydration process. The circulation passage 8 and the water injection portion 10 are formed as separate spaces in each baffle 6.

[0044] like Figure 2 Shown, be formed with horizontally long circulating water port 8a at the upper end of such circulation path 8. In addition, at the lower end of circulation path 8, be formed with near opening at the bottom 2c of washing-dehydration bucket 2, more specifically at the peristome 8c of opening below of pulsator main body 4a.

[0045] Therefore, in the drain valve 3na (refer to Figure 2 ) is closed and the outer tub 3 is filled with washing water during the cleaning process, as shown in FIG. Figure 2 Shown in the middle arrow, the washing water stirred by the lower blade portion 4c of pulsator 4 enters from peristome 8c and ascends in circulation path 8, spits from circulating water port 8a, and clothes are poured and washed. In addition, by repeating this action, washing water circulates in washing-dehydration tub 2.

[0046] Each of the three water injection sections 10 includes two first water storage sections 11 positioned on either side of the circulation passage 8, and a second water storage section 12 connecting the upper ends of the two first water storage sections 11. Specifically, the water injection section 10 comprises two first water storage sections 11, each divided into two left and right sections, and a second water storage section 12, each formed as a single unit above the two sections. The first water storage sections 11 and the circulation passage 8 are positioned at approximately the same height, with virtually no gap between them.

[0047] like Figure 5As shown, comb-shaped ribs 11T are arranged at the border between the upper end of the first water storage section 11 and the lower end of the second water storage section 12 in each of the three water inlet sections 10. The comb-shaped ribs 11T are plate-shaped members that are curved to follow the outer shape of the upper end of the washing and dehydration tub 2. The comb-shaped ribs 11T have ten inlet ports 11a arranged on their inner circumference and ten ribs 11A arranged on the outer periphery of the inlet ports 11a. Five inlet ports 11a are arranged on the portion of the comb-shaped ribs 11T that is circumferentially closer to the circulation passage 8, and five inlet ports 11a are arranged on the portion of the comb-shaped ribs 11T that is circumferentially closer to the circulation passage 8. In other words, five inlet ports 11a are arranged on either side of the circulation passage 8 above the first water storage section 11.

[0048] The water injection device 30 is a component that injects regulated water into each of the three water injection sections 10. The water injection device 30 includes three water injection hoses 30a connected to each of the three water injection sections 10. Each water injection hose 30a is equipped with a water supply valve 31a. The number of water injection hoses 30a is the same as the number of water injection sections 10, and each hose is attached to the top end of each of the three water injection sections 10.

[0049] In this embodiment, tap water is used as the adjustment water. Therefore, the configuration is as follows: when the adjustment water is injected into the second water storage part 12 through the water injection nozzle 30a of the water injection device 30 while the washing and dehydration barrel 2 is rotating, the adjustment water injected into the second water storage part 12 is as follows: Figure 7 As shown, after being stored above the comb-shaped ribs 11T, the water moves into the first water storage portion 11 through the inlet 11a formed in the comb-shaped ribs 11T.

[0050] A water-receiving rib 11b is formed at the lower end of the first water reservoir 11. This rib 11b protrudes inward from the outer circumference of the first water reservoir 11, creating a gap between the tip of the rib 11b and the inner circumference of the first water reservoir 11. Therefore, during the spin cycle, while the wash-spin tub 2 is rotating, the adjusted water moving from the second water reservoir 12 into the first water reservoir 11 is held against the outer circumference of the first water reservoir 11 by centrifugal force and retained above the rib 11b.

[0051] It should be noted that a drainage pipe 11c is connected to the lower end of the first water storage portion 11. Therefore, during the dehydration process, when the rotation speed of the washing and dehydration tub 2 decreases, the centrifugal force decreases. When the rotation speed of the washing and dehydration tub 2 exceeds a specified speed, the regulated water retained above the water receiving rib 11b becomes unable to adhere to the outer peripheral side of the first water storage portion 11 and is discharged through the gap between the top of the water receiving rib 11b and the inner peripheral surface of the first water storage portion 11 and the drainage pipe 11c.

[0052] Furthermore, the two first water storage sections 11 disposed on either side of the circulation passage 8 are connected at their mid-height portions by a connection section 16. Therefore, when the level of the regulated water in one of the two first water storage sections 11 is higher than the connection section 16, the regulated water flows through the connection section 16 to the other first water storage section 11.

[0053] Figure 8 (a) is a diagram showing the comb-shaped ribs 11T disposed at the upper end of the first water storage portion 11 as viewed from above. Figure 8 (b) is Figure 8 (a) is a schematic diagram of a partial cross section at line a-a. Figure 8 In (a), the position of the water injection nozzle 30a of the water injection device 30 connected to the upper end of the second water storage section 12 is shown by a dotted line. The water injection nozzle 30a of the water injection device 30 is connected to the upper part of the circulation passage 8. Therefore, the inlet 11a is not formed in the portion of the comb-shaped rib 11T arranged below the water injection nozzle 30a.

[0054] The width of the first water storage portion 11 (the width along the radial direction of the washing and dehydration barrel 2) is the same as the width of the second water storage portion 12 and the width of the comb-shaped ribs 11T, which are all A1. The width A2 of the inlet 11a formed at the upper end of the first water storage portion 11 is smaller than A1 because the ribs 11A protruding radially inward are formed on its outer periphery.

[0055] Therefore, the regulated water injected into the second water reservoir 12 from the water injection nozzle 30a of the water injection device 30 is held by centrifugal force against the outer periphery of the second water reservoir 12 and above the ribs 11A of the comb-shaped ribs 11T. Then, when the amount of regulated water held above the ribs 11A increases and exceeds the height of the ribs 11A, the regulated water moves from the inlet 11a into the first water reservoir 11.

[0056] That is, while the amount of adjusted water injected into the second water storage section 12 is below the specified amount, the adjusted water is stored in the second water storage section 12. When the amount of adjusted water injected into the second water storage section 12 exceeds the specified amount, the adjusted water moves from the second water storage section 12 to the first water storage section 11.

[0057] In the second water storage portion 12, the thickness of the adjustment water (the radial width along the washing and dehydration barrel 2) maintained above the ribs 11A of the comb-shaped ribs 11T is roughly the same in the entire circumferential direction, so the adjustment water moves almost simultaneously to the two first water storage portions 11 arranged on both sides of the circulation passage 8.

[0058] In the washing machine 1 of this embodiment, when the proximity switch 55 detects the mark 52a (see Figure 2), the imbalance amount is calculated based on the magnitude of the horizontal and vertical accelerations emitted by the acceleration sensor 58, and the angle of the imbalance direction is calculated based on the signal representing the horizontal and vertical accelerations emitted by the acceleration sensor 58 and the signal representing the position of the mark 52a input from the proximity switch 55.

[0059] Based on the signal indicating the amount of imbalance and the position of the imbalance, a pre-stored control program is used to determine which water injection section 10 in the washing and dehydration tub 2 is to be supplied with water and the amount of water to be supplied. It should be noted that as to which water injection section 10 in the washing and dehydration tub 2 is to be supplied with water, a water injection section 10 located opposite to the position of the laundry mass in the washing and dehydration tub 2, which is the main cause of the imbalance, is selected. Then, a water supply valve 31a connected to the selected water injection section 10 is opened to inject adjustment water. When the imbalance is eliminated by the water injection section 10, the injection of adjustment water is stopped.

[0060] As such, the washing machine 1 of this embodiment comprises: a washing and dehydrating barrel 2, at the bottom of which a pulsator 4 is arranged; a circulation passage 8, arranged on the inner circumferential surface 2a of the washing and dehydrating barrel 2, so that the washing water stirred by the lower blade portion 4c of the pulsator 4 passes through the circulation passage 8 toward the upper end portion of the washing and dehydrating barrel 2 and is discharged from the circulation water port 8a; three or more water injection portions 10, arranged on the inner circumferential surface 2a of the washing and dehydrating barrel 2, independently of the circulation passage 8 and arranged at equal intervals along the circumferential direction; and a water injection device 30, which can separately inject adjustment water into each water injection portion 10.

[0061] When adopting such structure, the circulation path 8 of the washing water that will be used for watering in the cleaning process and the water injection portion 10 of the adjustment water that is used for eliminating the unbalanced state of the washing and dehydration bucket 2 in the dehydration process are separately provided with. Therefore, can eliminate the unbalanced state of the washing and dehydration bucket 2 by water injection in the dehydration process, and can spit out sufficient washing water from the circulating water port 8a of circulation path 8 and water in the cleaning process.

[0062] In the washing machine 1 of the present embodiment, the water filling portion 10 includes two first water storage portions 11 arranged on both sides of the circulation passage 8 .

[0063] When such a structure is adopted, the protrusion in the washing and dehydrating tub 2 can be eliminated, and the elliptical deformation of the washing and dehydrating tub 2 during the dehydration process after water is poured into the water pouring part 10 can be reduced.

[0064] As described above, in the washing machine 1 of the present embodiment, the water filling portion 10 includes the second water storage portion 12 connecting the upper end portions of the two first water storage portions 11 .

[0065] When such a structure is adopted, the water inlet for injecting water into the water injection part 10 can be set to one, which can reduce the situation where the washing and dehydrating tub 2 is elliptical in shape during the dehydration process after water is injected into the water injection part 10.

[0066] As described above, the washing machine 1 of this embodiment includes the comb-shaped ribs 11T as storage members provided between the first water storage portion 11 and the second water storage portion 12. The comb-shaped ribs 11T include the inlet 11a disposed on the inner periphery thereof and the ribs 11A disposed on the outer periphery of the inlet 11a.

[0067] When such a structure is adopted, the water inlet for pouring water into the water pouring part 10 can be provided as one, and water can be equally poured into the two first water storage parts 11 .

[0068] As described above, in the washing machine 1 of the present embodiment, the water filling portion 10 includes the connection portion 16 that connects the middle portions in the height direction of the two first water storage portions 11 .

[0069] When such a structure is adopted, the water inlet for injecting water into the water injection part 10 can be set to one. Even if water is injected unevenly into the two first water storage parts 11, water can move through the connecting part 16 to make the water amount of the two first water storage parts 11 uniform.

[0070] As mentioned above, although embodiment of this invention was demonstrated, the structure of this embodiment is not limited to the said embodiment, Various deformation|transformation is possible.

[0071] For example, in the above embodiment, three water injection portions 10 are formed on the inner circumferential surface of the washing and dehydrating tub 2, the same number as the circulation passages 8, but the present invention is not limited thereto. The number of circulation passages 8 can be any number, for example, the number of circulation passages 8 can be one, two, or more than four. The number of water injection portions 10 can be any number, for example, the number of water injection portions 10 can be four or more. The number of water injection portions 10 and the number of circulation passages 8 can also be different.

[0072] In the above embodiment, the circulation passage 8 and the water injection portion 10 are circumferentially arranged at approximately the same position on the inner circumferential surface of the washing and dehydration barrel 2, but the present invention is not limited thereto. The arrangement of the circulation passage 8 and the arrangement of the water injection portion 10 are arbitrary. For example, the water injection portion 10 may also be arranged at a position different from the circulation passage 8 on the inner circumferential surface of the washing and dehydration barrel 2 in a manner away from the circulation passage 8.

[0073] In the above embodiment, the water injection unit 10 includes two first water storage portions 11 disposed on either side of the circulation passage 8 and a second water storage portion 12 connecting the upper ends of the two first water storage portions 11. However, the structure of the water injection unit 10 is arbitrary. For example, the water injection unit 10 may include a single first water storage portion 11 disposed on only one side of the circulation passage 8.

[0074] In the above embodiment, the comb-shaped ribs 11T disposed between the first water storage section 11 and the second water storage section 12 have ten inlet ports 11a arranged on the inner circumference thereof and ten ribs 11A arranged on the outer circumference of the inlet ports 11a. However, this is not limiting. For example, the number, shape, and arrangement of the inlet ports 11a of the comb-shaped ribs 11T, as well as the height of the ribs 11A, are arbitrary.

[0075] In the above embodiment, the two first water storage parts 11 arranged on both sides of the circulation passage 8 are connected by the connecting part 16 at the middle portion in the height direction. However, the two first water storage parts 11 may not be connected.

[0076] Other structures can be modified in various ways without departing from the technical spirit of the present invention.

Claims

1. A washing machine, characterized in that: have: The washing and dehydrating barrel is provided with a pulsator at the bottom; a circulation passage disposed on the inner circumference of the washing and dehydrating tub, so that the washing water stirred by the lower blade portion of the pulsator passes through the circulation passage toward the upper end portion of the washing and dehydrating tub and is discharged from the circulation water outlet; Three or more water injection parts are arranged on the inner peripheral surface of the washing and dehydrating barrel, and are arranged at equal intervals along the circumferential direction independently of the circulation passage; and A water injection device capable of injecting adjustment water into each water injection part individually; The water injection portion includes two first water storage portions disposed on both sides of the circulation passage.

2. The washing machine according to claim 1, wherein The water injection portion includes a second water storage portion connecting upper end portions of the two first water storage portions.

3. The washing machine according to claim 2, characterized in that The device comprises: a storage member provided between the first water storage portion and the second water storage portion; The storage member includes an inlet disposed on an inner peripheral side thereof and a rib disposed on an outer peripheral side of the inlet.

4. The washing machine according to any one of claims 1 to 3, characterized in that The water injection portion includes a connection portion connecting middle portions in the height direction of the two first water storage portions.

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