JP6799220B2 - washing machine - Google Patents

Description

The present invention relates to a washing machine.

The washing machine described in Patent Document 1 includes a pulsator rotatably provided at the bottom of the washing tub and a baffle provided on the inner peripheral surface of the washing tub. The baffle is provided so as to bulge toward the inner peripheral side of the washing tub in a posture tilted at a predetermined angle with respect to the rotation axis of the pulsator. In the easy-to-wash and rinse operation, the laundry in the washing tub rides on the water stream generated by the rotation of the pulsator. When the laundry on the water stream comes into contact with the baffle, it is lifted up along the slope of the baffle. As a result, the laundry on the bottom side in the washing tub is lifted.

Japanese Unexamined Patent Publication No. 2006-68189

In the washing machine, it is always desired to improve the washing power of the washing object such as the laundry of Patent Document 1.

The present invention has been made under such a background, and an object of the present invention is to provide a washing machine capable of improving cleaning power.

In the present invention, a cleaning tank in which a storage space for accommodating an object to be cleaned is formed and water is stored, a water flow generating member that generates a water flow from the water stored in the cleaning tank, and a cleaning tank are provided. A discharge port that faces the accommodation space from below and discharges the water flow generated by the water flow generating member upward to the accommodation space is formed so as to face the accommodation space from below. It is a washing machine including a facing portion and a lifting prevention member that protrudes into the accommodating space above the discharge port and prevents the object to be cleaned from floating in the accommodating space.

Further, the present invention is characterized in that the floating prevention member is provided in the middle of the accommodation space in the vertical direction.

Further, the present invention is characterized in that the lower surface portion of the lift prevention member includes a flat surface.

According to the present invention, the water flow generated by the water flow generating member from the water stored in the washing tank is discharged upward from the discharge port formed in the facing portion facing the storage space of the washing tank from the lower side to the storage space. Then, the object to be cleaned in the containment space is exposed from below. As a result, the object to be washed is washed.
The object to be cleaned tries to float when it is exposed to a stream of water from below, but the anti-lifting member that protrudes into the accommodation space above the discharge port is ahead of the object to be cleaned that is about to float. Since it is located, it is prevented that the object to be cleaned is lifted by a predetermined distance or more. As a result, the distance from the discharge port to the object to be cleaned is kept short, so that the cleaning power can be improved by rushing the water flow from the discharge port onto the object to be cleaned.
In addition, the water flow discharged upward from the discharge port may bounce off the lower surface portion of the floating prevention member toward the facing portion and then be exposed to the object to be cleaned. As a result, the object to be cleaned can be effectively agitated in the region from the facing portion to the floating prevention member in the accommodation space. Therefore, it is possible to expose every corner of the object to be cleaned with a stream of water, so that the cleaning power can be further improved.

Further, according to the present invention, since the floating prevention member is provided in the middle of the accommodation space in the vertical direction, it is surely prevented that the object to be cleaned in the storage space is lifted by a predetermined distance or more.

Further, according to the present invention, the water flow discharged upward from the discharge port can be surely rebounded to the facing portion side by the flat surface included in the lower surface portion of the floating prevention member.

FIG. 1 is a vertical cross-sectional view of the internal structure of the washing machine according to the embodiment of the present invention. FIG. 2 is a vertical cross-sectional view of the internal structure of the washing machine according to the modified example.

Hereinafter, the washing machine 1 according to the embodiment of the present invention will be specifically described with reference to the drawings. The cleaning machine 1 is a device for cleaning the object to be cleaned Q. An example of the object to be washed Q is laundry such as clothes, and the washing machine 1 in this case is a washing machine. Another example of the object to be cleaned Q is fruits and vegetables. The washing machine 1 may have a function of drying the object to be washed Q.

FIG. 1 is a vertical cross-sectional view of the internal structure of the washing machine 1. First, an outline of the washing machine 1 will be described with reference to the vertical direction Z in FIG. Of the vertical directions Z in the vertical direction, the upper side is referred to as the upper side Z1 and the lower side is referred to as the lower side Z2. The washing machine 1 includes a box-shaped housing (not shown) and a washing tank 2 arranged in the housing. The cleaning tank 2 includes an outer tank 3 elastically supported by a housing via a damper (not shown) and an inner tank 4 that is rotatable in the outer tank 3. The washing machine 1 includes a facing portion 5 and a pumping member 6 provided in the inner tank 4, a motor 7 for rotating the inner tank 4, and a water flow that can rotate in the inner tank 4 by receiving a driving force of the motor 7. The generating member 8 and the lifting prevention member 9 are further included. The washing machine 1 may not be equipped with a pulsator used in a general washing machine.

The outer tank 3 is made of resin, for example, and is formed in a bottomed cylindrical shape having a central axis extending in the vertical direction Z. The outer tank 3 has a substantially cylindrical circumferential wall 3B having a substantially circular opening 3A at the upper end, a substantially disk-shaped bottom wall 3C in which the hollow portion of the circumferential wall 3B is closed from the lower side Z2, and a circumferential wall. It has a substantially cylindrical internal space 3D surrounded by 3B and a bottom wall 3C and exposed from the opening 3A to the upper Z1. The upper end portion of the circumferential wall 3B where the opening 3A is formed is formed in a ring shape surrounding the opening 3A. The opening 3A is opened and closed by a cover (not shown) connected to the upper end of the circumferential wall 3B. In the internal space 3D, water such as tap water, bath water, and a liquid in which detergent is dissolved is stored from the bottom wall 3C side.

The inner tank 4 has a central axis extending in the vertical direction Z, and is formed in a bottomed cylindrical shape that is one size smaller than the outer tank 3. That is, the inner tank 4 is in a vertically arranged state. The inner tank 4 has a substantially cylindrical circumferential wall 4B having a substantially circular opening 4A at the upper end, a substantially disk-shaped bottom wall 4C coaxially connected to the lower end of the circumferential wall 4B, and a circumferential wall 4B. It also has a substantially cylindrical internal space 4D surrounded by a bottom wall 4C and exposed from the opening 4A to the upper Z1. For example, the circumferential wall 4B is made of metal, and in the bottom wall 4C, the central portion of the circle is made of metal and the outer peripheral portion is made of resin. The portion of the outer peripheral portion of the bottom wall 4C that protrudes to the upper side Z1 may be regarded as the lower end portion of the circumferential wall 4B. The bottom wall 4C and the lower end portion of the circumferential wall 4B connected to the bottom wall 4C form the bottom portion of the inner tank 4. The inner tank 4 is coaxially housed in the outer tank 3. The inner tank 4 can rotate about a central axis passing through the center of the circle. The central axis of the inner tank 4 is called the rotation axis J.

In the following, the circumferential direction around the rotation axis J is referred to as the circumferential direction S, and the radial direction centered on the rotation axis J is referred to as the radial direction R. The circumferential direction S and the radial direction R are both directions along the horizontal direction H. Of the radial directions R, the side closer to the rotation axis J is called the radial inner side R1, and the side away from the rotation axis J is called the radial outer side R2.

The opening 4A communicates with the opening 3A of the outer tank 3 from the lower side Z2, and the opening 3A and the opening 4A are collectively opened and closed by the above-mentioned cover (not shown). The user of the washing machine 1 can put the cleaning object Q in and out of the internal space 4D of the inner tank 4 through the open opening 4A. The object to be cleaned Q is housed in the internal space 4D. Through holes 4E are formed in each of the circumferential wall 4B and the bottom wall 4C, and water in the outer tank 3 can flow between the outer tank 3 and the inner tank 4 through the through holes 4E. As a result, water is stored in the internal space 4D from the bottom wall 4C side so as to have the same water level as the outer tank 3. The plurality of through holes 4E formed in the bottom wall 4C are arranged at positions biased toward the rotation axis J side, that is, the inner diameter R1 in the radial direction, at intervals in the circumferential direction S.

An annular balance ring 11 is attached to the upper end of the inner peripheral surface 4F that partitions the internal space 4D from the radial outer side R2 on the circumferential wall 4B. The balance ring 11 reduces the vibration of the inner tank 4 during rotation, and the cavity 11A inside the balance ring 11 contains a liquid, for example, salt water, which contributes to the reduction of vibration. On the upper surface of the bottom wall 4C, a concave arrangement region 12 recessed one step toward the lower side Z2 is formed. The arrangement area 12 is a vertically flat cylindrical space coaxial with the bottom wall 4C. The arrangement area 12 is surrounded by the lower end portion of the circumferential wall 4B from the radial outer side R2.

The facing portion 5 is a disk-shaped lid having a central axis that coincides with the rotation axis J and is flat in the horizontal direction H, and the inner tank 4 has a state in which almost the entire area of the arrangement region 12 is covered from the upper side Z1. Attached to the bottom. The facing portion 5 may be integrally provided in the inner tank 4 as a part of the bottom portion of the inner tank 4. The internal space 4D of the inner tank 4 is vertically partitioned by the facing portion 5 into an arrangement area 12 and a cleaning area 13 of Z1 above the arrangement area 12. The facing portion 5 is in a state of facing the cleaning region 13 from the lower side Z2. The arrangement area 12 is a small area that occupies the lower end of the internal space 4D, whereas the cleaning area 13 occupies most of the internal space 4D and is sandwiched from the vertical direction Z by the facing portion 5 and the balance ring 11. Area. The cleaning object Q in the internal space 4D is arranged in the cleaning region 13. The cleaning area 13 is a storage space 2A formed inside the cleaning tank 2 and in which the cleaning object Q is actually housed. A plurality of discharge ports 5A are formed on the outer peripheral portion of the facing portion 5 away from the rotation axis J at intervals in the circumferential direction S. Each discharge port 5A is in a state in which the outer peripheral portion of the facing portion 5 is penetrated in the vertical direction Z, the cleaning region 13 faces the lower side Z2, and the outer peripheral portion of the arrangement region 12 and the cleaning region 13 are communicated with each other.

The pumping member 6 is formed in a gutter shape that bulges in the radial inner R1 and extends in the vertical direction Z, and is attached from the radial inner R1 to the inner peripheral surface 4F of the circumferential wall 4B of the inner tank 4. A plurality of pumping members 6 may be provided, in which case the plurality of pumping members 6 are arranged side by side in the circumferential direction S. The upper end portion 6A of the pumping member 6 is arranged in the middle of the cleaning region 13 in the vertical direction Z, specifically, substantially in the center of the cleaning region 13. The upper end portion 6A has a hollow protruding portion 6B projecting inward R1 in the radial direction. In the protruding portion 6B, for example, on the side surface of the radial inner side R1, a sprinkler port 6C is formed which communicates with the hollow portion of the protruding portion 6B and faces the rotation axis J from the radial inner side R1. A pumping channel 14 extending in the vertical direction Z is formed between the pumping member 6 and the inner peripheral surface 4F. The hollow portion of the protrusion 6B is a part of the pumping channel 14. The pumping channel 14 is exposed to the radial inner side R1 from the sprinkler port 6C. The lower end of the pumping channel 14 is called a suction port 14A. The suction port 14A is connected from the upper side Z1 to a portion of the outer peripheral portion of the arrangement region 12 that is not covered by the facing portion 5.

A guide portion 4G is formed at the bottom portion of the inner tank 4 at a portion that partitions the arrangement region 12 from the radial outer side R2, specifically, at the lower end portion of the circumferential wall 4B. The guide portion 4G is a curved surface that bulges toward the outer side R2 in the radial direction toward the upper side Z1, and faces the outer peripheral portion of the arrangement region 12 from the outer side R2 in the radial direction. The guide portion 4G may be provided at least at the same position as each discharge port 5A of the facing portion 5 and the suction port 14A of the pumping channel 14 in the circumferential direction S at the bottom portion, but is provided over the entire bottom portion in the circumferential direction S. May be good. The upper end of the guide portion 4G located at the same position as the discharge port 5A in the circumferential direction S is connected to the discharge port 5A from the lower side Z2. The upper end of the guide portion 4G located at the same position as the suction port 14A in the circumferential direction S is connected to the suction port 14A from the lower side Z2.

The motor 7 is arranged in the lower Z2 of the bottom wall 3C of the outer tank 3 in the housing. The output shaft of the motor 7 branches into a tubular first transmission shaft 15 extending to the upper side Z1 and a second transmission shaft 16 inserted with play with respect to the first transmission shaft 15. The motor 7 can selectively output the driving force from either the first transmission shaft 15 or the second transmission shaft 16 via a known transmission mechanism 17.

The first transmission shaft 15 extends to the upper side Z1, penetrates the circular center of the bottom wall 3C, and is connected to the circular center of the bottom wall 4C of the inner tank 4. The upper end portion of the first transmission shaft 15 has a flange portion 15A overhanging in a flange shape, and the flange portion 15A is fixed to the bottom wall 4C from the lower side Z2 to be connected to the inner tank 4. When the motor 7 is driven and the driving force is transmitted to the first transmission shaft 15, the inner tank 4 rotates around the rotation axis J.

The water flow generating member 8 is in a non-contact state with both the bottom portion of the inner tank 4 and the facing portion 5 in the arrangement region 12 of the Z2 below the facing portion 5, and the upper Z1 of the bottom wall 4C of the inner tank 4 Is placed in. Since the internal space 4D of the inner tank 4 is partitioned into an arrangement area 12 in which the water flow generating member 8 is arranged and a cleaning area 13 in which the cleaning object Q is arranged in Z1 above the facing portion 5. It is possible to prevent the cleaning object Q in the cleaning region 13 from coming into contact with the rotating water flow generating member 8 and being damaged. As a result, the rotation speed of the water flow generating member 8 can be increased. The water flow generating member 8 has a top plate portion 20 and a plurality of blade portions 21.

The top plate portion 20 has a disc shape having a central axis that coincides with the rotation axis J, and has a plate thickness direction that coincides with or substantially coincides with the plate thickness direction of the bottom wall 4C of the inner tank 4. The outer diameter of the top plate portion 20 is substantially the same as the outer diameter of the facing portion 5. The top plate portion 20 is arranged in a state of being adjacent to and parallel to the facing portion 5 from the lower side Z2. At the center of the circle on the lower surface portion 20A of the top plate portion 20 that coincides with the rotation axis J, the upper end portion 16A protruding from the flange portion 15A above the flange portion 15A on the second transmission shaft 16 is connected from the lower side Z2.

The plurality of blade portions 21 are fins that are thin in the circumferential direction S and extend radially outward R2 so as to be separated from the rotation axis J, and are provided side by side in the circumferential direction S on the lower surface portion 20A of the top plate portion 20. The lower surface portion 20A is provided with a columnar space surrounded by each blade portion 21 from the radial outer side R2. This space is called the capture space 25. The lower surface portion 20A is provided with water channels 26 sandwiched between blade portions 21 adjacent to each other in the circumferential direction S, that is, adjacent first blade portions 23 and second blade portions 24. A plurality of waterways 26 exist and are arranged side by side in the circumferential direction S. Each water channel 26 is formed so as to communicate with the intake space 25 from the radial outer side R2 and extend radially from the intake space 25 to the radial outer side R2. The end of the radial outer R2 in each channel 26 is an outlet 26A exposed to the radial outer R2.

Each water channel 26 is in a state of being blocked from the upper side Z1 by the top plate portion 20. On the other hand, each blade portion 21 is in a state of facing the bottom wall 4C of the inner tank 4 from the upper side Z1 without contact. The water flow generating member 8 may have a closed portion (not shown) connected to the lower end of each blade portion 21 and blocking each water channel 26 from the lower side Z2. The intake space 25 is in a state of facing the through hole 4E on the rotation axis J side of the bottom wall 4C from the upper side Z1. The guide portion 4G formed at the bottom of the inner tank 4 is adjacent to the water flow generating member 8 from the radial outer side R2, and always faces the outlet 26A of at least one of the water channels 26 from the radial outer side R2. It is in a state.

The lift prevention member 9 is provided in the middle of the accommodation space 2A of the cleaning tank 2 in the vertical direction Z, that is, in the middle of the cleaning region 13 in the vertical direction Z, specifically, substantially in the center of the cleaning region 13. The lift-preventing member 9 is formed in a flange shape that protrudes from the inner peripheral surface 4F of the inner tank 4 into the cleaning region 13 in the radial inner direction R1 at Z1 above the discharge port 5A of the facing portion 5. The lift prevention member 9 is provided at least at the same position as the discharge port 5A of the facing portion 5 in the circumferential direction S. The lower surface portion 9A of the lift prevention member 9 located at the same position as the discharge port 5A in the circumferential direction S is in a state of facing the discharge port 5A from the upper side Z1. A flat flat surface 9B is provided along the horizontal direction H in a region of the lower surface portion 9A located at least directly above the discharge port 5A.

The protruding portion 6B of the upper end portion 6A provided at substantially the same position as the lifting prevention member 9 in the vertical direction Z in the pumping member 6 may also be regarded as the lifting prevention member 9. In this case, the lower surface portion of the protruding portion 6B functions as the lower surface portion 9A including the flat surface 9B described above.

When water is accumulated in the internal space 3D of the outer tank 3 and the internal space 4D of the inner tank 4, the water flow generating member 8 in the arrangement region 12 is in a state of being immersed in water. When the motor 7 is driven in this state, the driving force of the motor 7 is transmitted from the second transmission shaft 16 to the water flow generating member 8, so that the water flow generating member 8 rotates around the rotation axis J. When the water flow generating member 8 rotates, the inner tank 4 is in a stopped state. As shown by the thick solid arrow, the water existing in the intake space 25 flows into each water channel 26 by the centrifugal force due to the rotation of the water flow generating member 8 and flows through each water channel 26 so as to be separated from the rotation axis J. The water existing in Z2 below the water flow generating member 8 in the arrangement region 12 is pulled by the flow in each water channel 26 and flows away from the rotation axis J. When the water in the arrangement region 12 flows in this way, the water existing in the gap 27 between the circumferential wall 3B of the outer tank 3 and the circumferential wall 4B of the inner tank 4 in the radial direction R is attracted to the rotating water flow generating member 8. Then, as shown by the broken line arrow, it descends through the gap 27, reaches the gap 28 between the bottom wall 3C of the outer tank 3 and the bottom wall 4C of the inner tank 4, and then passes through the through hole 4E of the bottom wall 4C. It is taken into the arrangement area 12.

The water that has flowed from the intake space 25 into each water channel 26 and the water that has flowed away from the rotation axis J in Z2 below the water flow generating member 8 in the arrangement region 12, that is, the water stored in the cleaning tank 2. , It becomes a water flow by the centrifugal force due to the rotation of the water flow generating member 8, and flows to the outer side R2 in the radial direction from the water flow generating member 8. This water flow is guided to the upper side Z1 toward the discharge port 5A of the facing portion 5 or the suction port 14A of the pumping channel 14 by the guide portion 4G at the tip thereof. The water flow guided to the discharge port 5A is vigorously discharged upward from the discharge port 5A to the cleaning region 13 as indicated by the arrow of the alternate long and short dash line. The water flow guided to the suction port 14A of the pumping channel 14 rises in the pumping channel 14 from the suction port 14A as indicated by the arrow of the alternate long and short dash line, and is vigorously discharged from the sprinkling port 6C of the pumping member 6 for cleaning. It falls into the area 13. In this way, the water flow discharged from the discharge port 5A and the sprinkler port 6C to the cleaning area 13 in response to the rotation of the water flow generating member 8 is exposed to the cleaning object Q in the internal space 4D, or the cleaning object Q is agitated. By doing so, the cleaning object Q is washed. Further, the detergent may be contained in the water stream, and in this case, the dirt of the object to be cleaned Q is decomposed by the detergent.

The object Q to be cleaned tends to float when the water flow from the discharge port 5A is sprayed from the lower side Z2, but the floating prevention member 9 on the upper side Z1 of the discharge port 5A tries to float. Since it is located ahead of the object Q, it is prevented that the object Q to be cleaned is lifted by a predetermined distance or more in the cleaning area 13, that is, the accommodation space 2A of the cleaning tank 2. In particular, since the floating prevention member 9 is provided in the middle of the accommodation space 2A in the vertical direction Z, it is surely prevented that the cleaning object Q in the accommodation space 2A is lifted by a predetermined distance or more. Therefore, since the object Q to be cleaned is fastened to Z2 below the floating prevention member 9, the vertical distance from the discharge port 5A to the object Q to be cleaned is kept short, so that the water flow from the discharge port 5A is momentum. The cleaning power can be improved by exposing the object to be cleaned Q well.

Further, the water flow discharged upward from the discharge port 5A may bounce off the facing portion 5 side on the lower surface portion 9A of the floating prevention member 9 and then be exposed to the cleaning object Q. As a result, the object to be cleaned Q can be effectively agitated in the region from the facing portion 5 to the lifting prevention member 9 in the accommodation space 2A. Therefore, it is possible to expose every corner of the object to be cleaned Q to a stream of water, so that the cleaning power can be further improved. In particular, the water flow discharged upward from the discharge port 5A can be reliably rebounded to the facing portion 5 side by the horizontal flat surface 9B included in the lower surface portion 9A.

The water in the cleaning region 13 flows out from the through hole 4E of the circumferential wall 4B of the inner tank 4 into the gap 27 between the circumferential wall 3B of the outer tank 3 and the circumferential wall 4B of the inner tank 4, and then is rotated by the water flow generating member 8. It is taken into the arrangement area 12 to become a water stream, and is discharged to the cleaning area 13 again. That is, during the rotation of the water flow generating member 8, the water in the internal space 4D of the inner tank 4 becomes a water flow and circulates between the arrangement region 12 and the cleaning region 13. After cleaning the object Q to be cleaned, the inner tank 4 may rotate with the water flow generating member 8 stopped, and the object Q to be cleaned may be dehydrated by the centrifugal force thereof.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

For example, the lift prevention member 9 may also function as a baffle that agitates the object to be cleaned Q by rotating together with the inner tank 4. Further, a ring member formed in a ring shape like the balance ring 11 may be arranged on the lower side Z2 of the balance ring 11, and a part of the ring member may form a lift prevention member 9.

It is preferable that the lift prevention member 9 does not protrude radially inside R1 from the inner peripheral edge 3E of the opening 3A of the outer tank 3. That is, it is preferable that the peripheral edge portion of the radial inner edge R1 of the lift prevention member 9 is arranged so as to be displaced toward the radial outer edge R2 from the inner peripheral edge 3E of the opening 3A. As a result, it is possible to prevent the lifting prevention member 9 from getting in the way when the cleaning object Q is taken in and out of the opening 3A.

FIG. 2 is a vertical cross-sectional view of the internal structure of the washing machine 1 according to the modified example. In FIG. 2, the same parts as those described above are assigned the same numbers, and the description of the parts will be omitted.

In the washing machine 1 according to the modified example, for example, because the size of the inner tank 4 in the vertical direction Z is small, the vertical distance between the opening 3A of the outer tank 3 and the opening 4A of the inner tank 4 is as shown in FIG. Is big. In this case, in the internal space 4D of the inner tank 4, the cleaning region 13 on the upper side Z1 of the facing portion 5 and the upper space 3F communicating with the cleaning region 13 through the opening 4A in the inner space 3D of the outer tank 3 from the upper side Z1. However, it constitutes the accommodation space 2A of the washing tank 2 described above. The portion of the circumferential wall 3B of the outer tank 3 above the opening 4A Z1 may be transparent or translucent so that the object Q to be cleaned in the accommodation space 2A can be visually recognized from the outside of the machine.

In the washing machine 1 according to the modified example, the balance ring 11 attached to the upper end of the circumferential wall 4B of the inner tank 4 is in the middle of the accommodation space 2A in the vertical direction Z, specifically, substantially the center of the accommodation space 2A in the vertical direction Z. By projecting from the radial outer side R2 into the accommodation space 2A, it also functions as the above-mentioned lifting prevention member 9. In other words, the lift prevention member 9 is composed of the balance ring 11. In this case, the lower surface portion of the balance ring 11 functions as the lower surface portion 9A including the flat surface 9B described above. The cleaning target Q tries to rise when the water flow from the discharge port 5A is sprayed from the lower side Z2, but the balance ring 11 is located ahead of the cleaning target Q to be lifted. It is prevented that the object Q to be cleaned is lifted by a predetermined distance or more.

The rotation axis J may be arranged so as to be inclined with respect to the vertical direction Z. In this case, the facing portion 5 and the water flow generating member 8 are arranged so as to be inclined with respect to the horizontal direction H, so that the rotation axis J is arranged so as to be inclined. Maintain a posture orthogonal to J.

1 Washing machine 2 Washing tank 2A Storage space 5 Opposing part 5A Discharge port 8 Water flow generating member 9 Lifting prevention member 9A Bottom part 9B Flat surface Q Cleaning object Z Vertical direction Z1 Upper side Z2 Lower side

Claims (3)

A cleaning tank in which a storage space for accommodating the object to be cleaned is formed and water is stored , and has a central axis extending in the vertical direction and an opening for taking in and out the object to be cleaned is provided at the upper end. A cleaning tank including a bottomed cylindrical outer tank and a bottomed cylindrical inner tank having the storage space and being coaxially housed in the outer tank .
A water flow generating member that generates a water flow from the water stored in the washing tank, and
A discharge port provided in the washing tank and facing the accommodation space from below, and discharging the water flow generated by the water flow generating member upward to the accommodation space, allows the accommodation space to be discharged from below. Opposing parts formed to face each other
A lift-preventing member that projects into the accommodation space above the discharge port and prevents the object to be cleaned from floating in the accommodation space, and is an inner peripheral edge of the opening in the radial direction centered on the central axis. A washer that includes a lift-preventing member that is displaced outward from the surface . The lift prevention member is provided in the middle of the accommodation space in the vertical direction .
A pumping member attached to the inner peripheral surface of the circumferential wall of the inner tank and extending in the vertical direction, further including a pumping member forming a water pumping channel extending in the vertical direction with the inner peripheral surface.
The upper end portion of the pumping member has a protruding portion protruding inward in the radial direction.
A sprinkler port for exposing the pumping channel is formed in the protruding portion.
The washing machine according to claim 1, wherein the protruding portion functions as the floating prevention member . A lower surface portion of said floating preventing member, viewed contains a flat surface,
The washing machine according to claim 1 or 2 , wherein the portion of the circumferential wall of the outer tank above the inner tank is transparent or translucent .

Images