CN104631040B - A kind of washing machine and leveling method at the interior bucket bottom with equilibrium function - Google Patents

Abstract

The invention relates to a washing machine with a balancing function at the bottom of the inner tub and a leveling method in the field of washing machines. The washing machine includes: an outer tub (2), an inner tub (3) arranged in the outer tub (2), and an inner tub ( The pulsator (4) in 3), the inner barrel (3) includes the inner barrel bottom (5); the inner barrel bottom (5) is a cavity-like structure with a bottom wall (51), a top wall (53), and a side wall (52) , the top wall (53) is circular. After the washing machine is finished washing and the water is drained to the set water level, the inner tub (3) rotates at a speed v2, part of the washing water enters and is stored in the water storage chamber (6) under the action of centrifugal force, and then the inner tub (3) of the washing machine rotates at a speed greater than v2 Rotate and dehydrate at a high speed, the washing water stored in the water storage chamber (6) flows freely, and adjusts the balance of the inner bucket. Through the above device and method, the purpose of adjusting the balance of the inner barrel by using the bottom of the inner barrel is achieved.

Description

A washing machine with a balancing function at the bottom of the inner tub and a leveling method

technical field

The invention relates to a washing machine with a balancing function at the bottom of an inner tub and a leveling method in the field of washing machines.

Background technique

At present, when the pulsator washing machine is washing clothes, there will be eccentricity due to the uneven distribution of the laundry. In order to avoid the vibration and noise problems caused by eccentricity, a balance ring device is usually installed on the upper part of the inner tub of the pulsator washing machine, which can be very good. The unbalanced load on the upper part is balanced so that the washing machine can work more smoothly, but there is still a part of the unbalanced load on the lower part of the inner tub.

For example, the Chinese patent washing machine with the application number CN201310002079.7 provides a washing machine with a balance piece that provides enhanced performance. The washing machine includes: an outer shell; Accommodates washing water; the inner tub has a cylindrical structure, and the inner tub is rotatably arranged inside the outer tub; the first balancer is installed on the upper part of the inner tub to compensate for the unbalanced load of the inner tub; the second balancer is installed on the lower part of the inner tub, The unbalanced load of the inner tub is compensated by using a part of the washing water in the outer tub. The second balancing member includes: an inner channel for storing a part of washing water; and an outer channel formed along an outer circumference of the inner channel to compensate for an unbalanced load of the inner tub.

In the above technical solution, independent inner and outer passages are set at the bottom of the inner tub, and the washing water is used to level the unbalanced load of the inner tub. However, since the inner passage is relatively narrow and curved, after using the inner passage to store part of the washing water, the inner passage It is easy to store water in the washing machine, and the water stored in the inner passage is not easy to be completely drained after washing, and it is easy to cause pollution to the washing machine if it is stored in the washing machine for a long time. Moreover, the structure is relatively complicated, and it is easy to clamp the lint falling off from the laundry, and the lint is not easy to clean after being stored in the inner channel.

In view of this, the present invention is proposed.

Contents of the invention

The object of the present invention is to provide a washing machine with an inner tub bottom with a balancing function, so as to achieve the purpose of adjusting the balance of the inner tub by using the inner tub bottom.

In order to realize the purpose of the invention, the following technical scheme is adopted: a washing machine with an inner tub bottom with a balancing function, comprising: an outer tub, an inner tub arranged in the outer tub, a pulsator arranged in the inner tub, the inner tub includes an inner tub bottom; the inner tub bottom has The cavity-like structure of the bottom wall, the top wall and the side wall, and the top wall is in the shape of a ring.

Furthermore, the bottom of the inner barrel is a cavity-like structure with a bottom wall, a top wall and a side wall, and the top wall is in the shape of a ring; the ring-shaped top wall is formed by bending and extending the circumferential side wall of the inner barrel bottom into the inner barrel. The wall and the side wall together form an annular water storage chamber.

Further, the circumferential side wall is provided with a top wall formed by annular ribs protruding into the inner bucket, and the top wall, bottom wall and side wall together form an annular water storage chamber.

Further, the bottom wall is ring-shaped, and the ring-shaped bottom wall gradually slopes downward from the outer circumference to the inner circumference; the bottom wall is provided with a top wall formed by a ring rib protruding horizontally into the inner barrel, and the top wall and the bottom wall together form a ring-shaped water storage chamber .

Furthermore, there are no through holes on the bottom wall, side wall and top wall constituting the water storage chamber, which ensures that the washing water in the water storage chamber will not be thrown out of the inner tub as the inner tub rotates.

Further, the distance between the top wall and the upper pulsator is h, 1mm<h<20mm. Therefore, the gap between the top wall and the pulsator will not be too small, so as to prevent the clothes and lint from being clamped. At the same time, a certain distance gap is set between the top wall and the pulsator to prevent contact friction between the pulsator and the bottom of the inner barrel and reduce wear.

Further, the side walls gradually protrude outward from both ends to the middle, so that the washing water flowing close to the side walls of the water storage chamber concentrates toward the middle of the side walls, so that as much washing water as possible remains in the water storage chamber.

Further, at least one water retaining rib is provided on the bottom wall of the inner bucket in the radial direction. By setting the water retaining ribs, the resistance of the washing water flowing in the water storage chamber is increased, so as to improve the ability of correcting the balance of the inner tub.

Further, the inner diameter of the top wall is smaller than the diameter of the pulsator, but greater than half of the diameter of the pulsator. The distance between the top wall and the upper pulsator is h, 1mm<h<20mm. Therefore, the gap between the top wall and the pulsator will not be too small, so as to prevent the clothes and lint from being clamped. At the same time, a certain distance gap is set between the top wall and the pulsator to prevent contact friction between the pulsator and the bottom of the inner barrel and reduce wear.

Further, the bottom wall is an annular structure, the hollow part of the annular bottom wall is inlaid with an inner barrel bottom flange, and the inner barrel bottom flange gradually slopes downward from the periphery to the center of the inner barrel bottom, and at least a drainage hole. Preferably, the inner barrel bottom flange is embedded in the hollow portion of the ring-shaped inner barrel bottom wall, and is integrally formed with the inner barrel bottom. The inner barrel bottom flange is composed of a circular flat plate at the center and a tapered plate inclined upward along the outer circumference of the circular flat plate. The center of the circular flat plate is provided with a central through hole for the installation of the rotating shaft. The outer periphery of the circular flat plate is connected to the inner periphery of the tapered plate. The outer circumference of the tapered plate is connected with the inner circumference of the bottom wall of the inner barrel. The tapered plate is gradually inclined downward from the outer circumference to the inner circumference. The drainage holes are radially arranged on the tapered plate. Further preferably, the plurality of drainage holes provided on the tapered plate are arranged symmetrically with respect to the center of the tapered surface. Thereby, make the washing water in the water storage chamber, after the inner tub stops rotating, flow to the drain hole along the bottom flange of the inclined inner tub, discharge the inner tub, and discharge the washing machine through the outer tub and the drain pipe.

Further, a balance ring is provided at the upper opening of the inner barrel. The balance ring is in the shape of a hollow ring, and the hollow part of the balance ring is filled with liquid and/or metal balls to cooperate with the bottom of the inner barrel to jointly compensate the unbalanced load of the inner barrel.

Another object of the present invention is to provide a method for leveling the washing machine at the bottom of the inner tub with a balancing function as described above, including: after the washing machine is finished washing and the water is drained to the set water level, the inner tub rotates at speed v2, and the washing machine is partially washed The water enters the water storage chamber under the action of centrifugal force; then the inner tub of the washing machine spins and dehydrates at a speed greater than v2, and the washing water stored in the water storage chamber freely distributes and flows to adjust the balance of the inner tub.

Further, the specific steps of the leveling method of the above-mentioned washing machine are as follows: 1) After washing, the drain motor works, the drain valve opens, and the washing machine starts to drain, and the inner tub rotates at a low speed v1 while draining; 2) When the drain reaches the set water level H, The inner tub rotates at a medium speed v2, so that the washing water in the water storage chamber at the bottom of the inner tub enters the water storage chamber under the action of centrifugal force; 3) The inner tub continues to rotate at a medium speed v2 until the washing machine drains to the empty water level and starts dehydration; 4) The inner tub Rotate at a speed v3 greater than v2 to make the washing machine start to dehydrate. Under the action of centrifugal force, the washing water in the water storage chamber flows freely to adjust the balance of the inner tub; 5) After dehydration, the washing water in the water storage chamber moves along the The drain hole flows out of the inner barrel, and then is discharged to the outside of the washing machine through the outer barrel and the drain pipe.

Further, after the dehydration is completed, the inner tub stops rotating, and the washing water in the water storage chamber is discharged from the inner tub along the drain hole, and then discharged into the washing machine through the outer tub and the drain pipe. After the dehydration is finished, the drainage motor continues to work for a period of time T, so that the washing water in the water storage chamber is completely discharged from the washing machine. When the washing machine is at the set water level, the washing water level is higher than the pulsator of the washing machine and lower than the minimum washing water level of the washing machine.

Furthermore, the relationship between the rotation speeds of the inner tub at different stages is as follows: 0<low speed v1<60rpm<medium speed v2<150rpm, so as to ensure that when the washing machine is draining, a part of the washing water is retained in the water storage chamber at the bottom of the inner tub pulsator, so that this part of the washing water It flows close to the side wall of the water storage chamber to achieve the function of the balance ring. Preferably, the low speed v1 is 30rpm, and the medium speed v2 is 80-150rpm.

After the washing is completed, when the washing machine drains water, the inner tub rotates at a medium speed v2, so that the washing water in the bottom of the tub enters the water storage chamber under the action of centrifugal force, and then the washing machine starts to dehydrate at a speed v3 greater than v2. If the inner tub does not Balanced, the washing water retained in the water storage chamber flows freely in the water storage chamber under the eccentric force caused by the load to achieve the leveling of the inner tub.

By adopting the above-mentioned technical solution, the advantage of the present invention compared with the prior art is that: through the above-mentioned device and method, the purpose of adjusting the balance of the inner tub by using the water storage chamber at the bottom of the inner tub and the washing water is achieved. After the washing machine stops dehydration, the washing water in the water storage chamber can flow completely along the opening to the bottom flange of the inner tub, which is inclined from the outer periphery to the center, and drain out of the inner tub through the drain hole set on the bottom flange of the inner tub, avoiding washing water and lint The retention in the water storage chamber reduces the growth of bacteria in the washing machine. Simultaneously, the present invention has simple structure, remarkable effect, and is suitable for popularization and use.

Description of drawings

The structural representation of washing machine among Fig. 1 the present invention;

Fig. 2 is a schematic structural view of the bottom of the drum in the washing machine of the present invention;

The structural representation of A-A section among Fig. 2 of Fig. 3 of the present invention;

The structural representation of the A-A section among the preferred Fig. 2 of Fig. 4 of the present invention;

Fig. 5 is the structural representation of A-A cross-section among the further preferred Fig. 2 of the present invention;

Fig. 6 is the working flow diagram of the present invention.

Description of main components:

1—outer casing, 2—outer barrel, 3—inner barrel, 4—wave wheel, 5—inner barrel bottom, 6—water storage cavity, 7—drain valve, 8—inner barrel bottom flange, 9—balance ring, 10—motor, 11—axis of rotation, 51—bottom wall, 52—side wall, 53—top wall, 81—circular flat plate, 82—conical plate, 83—drainage hole, 84—water retaining plate, 85—center through hole.

Detailed ways

The present invention will be further described in detail below in conjunction with the examples.

Example 1

As shown in Figure 1, this embodiment introduces a washing machine with a balance function at the bottom of the inner tub, including: a casing 1, an outer tub 2 installed in the casing 1, and a tub installed in the outer tub 2 whose axis is aligned with the vertical direction. Acute angle or overlapping inner barrel 3, inner barrel 3 bottom is provided with pulsator 4, and pulsator 4 bottom is connected with rotating shaft 11, and rotating shaft 11 is connected with the motor 10 of outer barrel bottom. A drain pipe is connected to the bottom of the tub 1, and a drain valve 7 is arranged on the drain pipe. The bottom of the inner bucket 3 is provided with an inner bucket bottom 5, which forms an annular water storage chamber 6, and the water storage chamber 6 is provided with an opening for washing water to enter. Thereby, make use of the centrifugal force of the rotation of the inner tub to enter part of the washing water into the water storage chamber 6 through the opening, and rotate close to the outer wall of the water storage chamber to remain in the water storage chamber 6. When the inner tub is dehydrated, the washing water in the water storage chamber 6 is used to The inner barrel 3 is corrected and leveled, so as to achieve the purpose of using the inner barrel bottom 5 to realize the balancing ring.

As shown in Fig. 2 and Fig. 3, in this embodiment, the inner barrel bottom 5 includes: an annular bottom wall 51, a circumferential side wall 52 bent upward along the outer periphery of the bottom wall 51, and the upper end of the side wall 52 The top wall 53 is formed by bending inwardly of the inner bucket. The bottom wall 51 , the side wall 52 and the top wall 53 integrally form the inner barrel bottom 5 . The bottom wall 51 and the top wall 53 are arranged horizontally, and the outer ends are respectively connected to the upper and lower ends of the side wall 52 to form an annular water storage chamber 6 with a horizontal "U" shape in cross section. The upper end of the inner tub bottom circumferential side wall 52 is connected to the bottom of the inner tub side wall, so that the inner tub bottom 5 is installed on the inner tub 3 .

In this embodiment, the bottom wall 51 is an annular flat plate, and the diameter of the outer circumference is matched with the diameter of the side wall of the inner barrel. The side wall 52 is a cylindrical side wall that gradually protrudes outward from both ends to the middle, and its lower end is connected with the outer periphery of the bottom wall 51 . The top wall 53 is an annular flat plate matched with the bottom wall, and its outer periphery is connected with the upper end of the side wall 52 . Thus, the bottom wall 51 , the side wall 52 and the top wall 53 form a "U"-shaped annular water storage chamber 6 with a horizontal cross section. By setting the side wall 52 as a cylindrical side wall that gradually protrudes outward from both ends to the middle, the washing water flowing close to the side wall 52 is concentrated to the middle of the side wall 52, so that as much washing water as possible remains in the storage water. chamber 6.

In this embodiment, the inner circumference of the top wall 53 forms a circular through hole, and the inner diameter of the circular through hole is smaller than the outer diameter of the pulsator 4 and greater than half of the outer diameter of the pulsator. . The top wall 53 is located at the bottom of the pulsator 4, and there is a certain gap between the top wall 53 and the pulsator 4, so that the water storage chamber 6 communicates with the inner barrel 3 on the top of the pulsator 4 through the opening. In this embodiment, the distance between the top wall 53 and the pulsator 4 is h, 1mm<h<20mm; preferably, h is 7mm. Thereby, it is ensured that the clothing in the inner tub 3 on the top of the pulsator 4 will not be clamped in the gap, nor will the lint in the washing water be clamped in the gap.

In this embodiment, the bottom wall 51 , the side wall 52 and the top wall 53 constituting the inner tub bottom 5 jointly constitute the water storage chamber 6 for the washing water to rotate and flow along the outer periphery of the inner tub bottom 5 . The bottom wall 51 , the side wall 52 and the top wall 53 do not have drainage holes communicating with the tub 3 . Therefore, the water storage chamber 6 forms a flow channel for the washing water to flow along the outer periphery of the inner tub bottom 5, ensuring that the washing water in the flow channel will not be thrown out of the water storage chamber 6 as the inner tub 3 rotates.

As shown in Figure 3 and Figure 4, the bottom wall 51 of the inner barrel bottom 5 is an annular structure, and the inner periphery of the annular bottom wall is inlaid with an inner barrel bottom flange 8; preferably, the inner barrel bottom flange 8 It is integrally formed with the bottom 5 of the inner barrel. The inner barrel bottom flange 8 is composed of a circular flat plate 81 at the center and a tapered plate 82 inclined upward along the outer periphery of the circular flat plate. The center of the circular flat plate 81 is provided with a central through hole 85 for installing the rotating shaft 11 . The outer periphery of the circular flat plate 81 is connected to the inner periphery of the tapered plate 82 . The outer periphery of the tapered plate 82 is connected to the inner periphery of the bottom wall 51 of the inner barrel. The tapered plate 83 is gradually inclined downward from the outer circumference to the inner circumference.

As shown in FIG. 2 and FIG. 3 , in this embodiment, at least one drain hole 83 is provided on the flange 8 at the bottom of the inner tub. Preferably, a plurality of drainage holes 83 are evenly distributed on the tapered plate 82 of the flange 8 of the inner tub bottom relative to the center of the inner tub bottom 5 .

In this embodiment, the bottom wall 51 of the inner tub bottom 5 is provided with a plurality of water baffles 84 arranged symmetrically with respect to the center of the inner tub bottom. The water baffle 84 is arranged along the radial direction of the inner tub bottom 9 and extends from the outer peripheral portion of the tapered plate 82 to the bottom wall 51 of the inner tub bottom 5 . By setting a water baffle in the water storage chamber, the friction force of the washing water in the water storage chamber at the bottom of the inner tub is increased during the rotation process, so as to improve the kinetic energy of the washing water leveling when the inner tub dehydration starts, and it can also be used quickly when the inner tub stops dehydration. The rotation rate of the washing water is reduced, thereby eliminating the vibration phenomenon generated when the washing water rotation starts and stops to the greatest extent.

In this embodiment, a balance ring 9 is provided at the upper opening of the inner tub 3 . The balance ring 9 is filled with liquid and/or metal balls, preferably, the balance ring 9 is filled with brine. The balance of the inner barrel is adjusted through the cooperation of the balance ring and the bottom of the inner barrel.

Example 2

As shown in FIG. 4 , in this embodiment, the top plate 53 is formed by an annular rib protruding from the peripheral side wall 52 into the inner tub. In this embodiment, the water storage chamber 6 is jointly surrounded by an annular bottom wall 51 , a circumferential side wall 52 bent upward along the outer periphery of the bottom wall 51 , and a top wall 53 . The bottom wall 51 , the side wall 52 and the top wall 53 integrally form the inner barrel bottom 5 . The bottom wall 51 and the top wall 53 are arranged horizontally, and the outer ends are respectively connected to the side walls 52 to form an annular water storage chamber 6 with a horizontal "U" shape in cross section.

In this embodiment, the bottom wall 51 is an annular flat plate, and the diameter of the outer circumference is matched with the diameter of the side wall of the inner barrel. The side wall 52 between the junction of the bottom wall 51 and the top wall 53 is a columnar structure that gradually protrudes from both ends to the middle. The lower end of the side wall 52 is connected to the outer periphery of the bottom wall 51 , and the upper end is connected to the inner barrel. The top wall 53 is an annular rib arranged horizontally, and its outer circumference is connected with the side wall 52 at any height. Therefore, the bottom wall 51 , the side wall 52 and the top wall 53 form an annular water storage chamber 6 with a cross-section in the shape of a horizontal "U".

Example 3

As shown in FIG. 5 , in this embodiment, the top wall 43 is formed by an annular rib protruding horizontally from the bottom wall 51 into the inner barrel. In this embodiment, the water storage chamber 6 is composed of a bottom wall 51 and a top wall 53 . In this embodiment, the bottom wall 51 is ring-shaped, and the bottom wall 51 gradually decreases from the outer circumference to the inner circumference. 51 constitutes the water storage chamber 6. A circumferential side wall 52 is bent upward along the outer periphery of the bottom wall 51 . The bottom wall 51 , the side wall 52 and the top wall 53 integrally form the inner barrel bottom 5 .

In this embodiment, the top wall can also be formed by an annular rib protruding horizontally into the inner barrel from any bottom wall (not marked in the drawings), and the bottom wall and the top wall form a water storage chamber.

Example 4

This example introduces a method for leveling the washing machine at the bottom of the inner tub with a balancing function, including: after the washing machine finishes washing, it starts to drain water; when it reaches the set water level H, the inner tub rotates at a speed of v2, and part of the washing water clings to the inner tub The outer wall of the water storage chamber set at the bottom rotates to stay in the water storage chamber; after the washing machine starts dehydration, the washing water in the water storage chamber flows freely to balance the load of the inner tub.

As shown in Figure 6, the specific steps of the leveling method of the above washing machine are as follows: 1) After washing, the drain motor works, the drain valve opens, and the washing machine starts to drain, and the inner tub rotates at a low speed v1 while draining; 2) When the drain reaches the set value After the water level H, the inner bucket rotates at a medium speed v2, so that the washing water in the water storage chamber at the bottom of the inner bucket clings to the outer wall of the water storage chamber under the action of centrifugal force, so as to remain in the water storage chamber; 3) The inner bucket continues to rotate at a medium speed v2 , until the washing machine drains to the empty water level and starts to dehydrate; 4) The inner tub rotates at a speed v3 greater than v2, so that the washing machine starts to dehydrate. Under the action of centrifugal force, the washing water in the water storage chamber flows freely to balance the load of the inner tub; 5 ) dehydration is completed, the washing water in the water storage chamber flows out of the inner tub along the drainage hole at the bottom of the inner tub, and then drains out of the washing machine through the outer tub and the drain pipe.

In this embodiment, when the inner tub is dehydrated, the balance ring provided at the upper opening of the inner tub cooperates with the bottom of the inner tub to jointly compensate the unbalanced load of the inner tub. By rotating the inner tub at a medium speed v2 until the washing machine drains to the empty water level and starts dehydration, the washing water in the water storage chamber is kept in the water storage chamber under the action of centrifugal force.

In this embodiment, when the washing water in the inner tub of the washing machine is at the height of the set water level H, the washing water in the inner tub does not pass through the pulsator. In this embodiment, the relationship between the rotation speeds of the inner tub at different stages is as follows: 0<low speed v1<60rpm<medium speed v2<150rpm, v3 is greater than v2, so as to ensure that a part of the washing water is retained in the inner tub when the washing machine is draining, so that this part of washing water Entering the annular water storage cavity, when the inner barrel is unbalanced, it plays the function of adjusting the balance. Preferably, the low speed v1 is 30rpm, and the medium speed v2 is 80-150rpm. In this embodiment, the specific value of v3 is determined by the system based on the actual load of the washing machine and the type of loaded clothes.

In this embodiment, after the dehydration is completed, the inner tub stops rotating, and the washing water in the water storage chamber no longer flows close to the outer wall of the water storage chamber, but flows along the bottom of the inner tub to the drain hole to be discharged from the inner tub. The pipe flows out of the washing machine. In this embodiment, after the dehydration is completed, the drain motor continues to work for a period of time T, so that the washing water in the water storage chamber is completely drained from the washing machine.

After the washing is completed, when the washing machine drains water, the inner tub rotates at a medium speed v2, so that the washing water in the water storage chamber rotates close to the side wall of the water storage chamber under the action of centrifugal force, so that the washing water remains in the water storage chamber . After the washing machine starts dehydration, the washing water retained in the water storage chamber flows freely in the water storage chamber under the action of the eccentric force caused by the unbalanced load of the inner tub, so as to realize the leveling of the inner tub.

The implementations in the above examples can be further combined or replaced, and the examples are only descriptions of preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention. Various changes and improvements to the technical solutions of the present invention made by those skilled in the art belong to the protection scope of the present invention.

Claims (9)

1. A washing machine with a balance function at the bottom of the inner tub, comprising: an outer tub (2), an inner tub (3) arranged in the outer tub (2), a pulsator (4) arranged in the inner tub (3), an inner tub ( 3) Including the inner barrel bottom (5); It is characterized in that: the bottom of the inner barrel (5) is a cavity-like structure with a bottom wall (51), a top wall (53) and a side wall (52), the top wall (53) is circular; the bottom wall (51) is Ring, the annular bottom wall (51) is gradually inclined downwards from the outer circumference to the inner circumference; (51) together form an annular water storage cavity (6). 2. A washing machine with a balanced inner bottom of the tub according to claim 1, characterized in that: the annular top wall (53) extends from the inner tub bottom (5) peripheral side wall (52) to the inner tub (3) Formed by bending and extending, the top wall (53), the bottom wall (51) and the side wall (52) jointly form an annular water storage chamber (6). 3. A washing machine with a balanced inner bottom of the barrel according to claim 1, characterized in that: the circumferential side wall (52) is provided with a top wall (53) formed of annular ribs protruding into the inner barrel, and the top wall (53) together with the bottom wall (51) and the side wall (52) form an annular water storage chamber (6). 4. A washing machine with an inner tub bottom with a balancing function according to any one of claims 2 to 3, characterized in that: the bottom wall (51) of the inner tub bottom (5) is provided with at least one stop in the radial direction Water reinforcement (84). 5. A washing machine with an inner tub bottom with a balancing function according to any one of claims 2 to 3, characterized in that: the inner diameter of the top wall (53) is smaller than the diameter of the pulsator (3), greater than half One times the diameter of the pulsator. 6. A washing machine with an inner tub bottom with a balancing function according to any one of claims 2 to 3, characterized in that: the hollow part of the annular bottom wall (51) is inlaid with an inner tub bottom flange (8), The inner drum bottom flange (8) gradually slopes downward from the periphery to the inner drum bottom (5) center; at least one drainage hole (83) is set on the inner drum bottom flange (8). 7. A method for leveling a washing machine with a balancing function at the bottom of the inner tub as claimed in any one of claims 1 to 6, characterized in that: after the washing machine is finished and the water is drained to the set water level, the inner tub (3) will Rotate, part of the washing water enters and stores in the water storage chamber (6) under the action of centrifugal force, then the inner tub (3) of the washing machine spins and dehydrates at a speed greater than the speed v2, and the washing water stored in the water storage chamber (6) is free Distribute flow, adjust inner barrel balance. 8. A leveling method according to claim 7, characterized in that: after the dehydration is completed, the inner tub (3) stops rotating, and the washing water in the water storage chamber (6) is discharged from the inner tub (3) along the drain hole (83) ), discharge the washing machine through the outer tub (2) and the drainpipe. 9. A leveling method according to claim 7, characterized in that: after the dehydration is completed, the drainage motor continues to work for a period of time T, so that the washing water in the water storage chamber (6) is completely discharged from the washing machine.