Control method of a washing machine and washing machine

Abstract

The present application belongs to the technical field of washing machines, and discloses a control method of a washing machine and the washing machine, the washing machine comprising: an inner drum, a drain port being arranged on the bottom of the inner drum; a centrifugal drainage device, the centrifugal drainage device blocking the drain port in a washing / rinsing process, so that the inner drum independently holds water; and the washing machine performing a drainage operation, comprising: controlling the inner drum to rotate at a buffer rotating speed V1 for a certain time length, and the centrifugal drainage device keeping the state of blocking the drain port; then controlling the inner drum to increase the rotating speed to reach or exceed a first set rotating speed V 01 , and the centrifugal drainage device opening the drain port to perform drainage. The washing machine disclosed by the present application controls the inner drum to rotate at a low speed for a certain time length when draining, and then increases the rotating speed to the rotating speed at which the centrifugal drainage device can open the drain port, so that the inner drum is not directly accelerated to a high rotating speed, the centrifugal drainage device is not subjected to a large centrifugal force in an instant and does not move violently, and further, the centrifugal drainage device is not damaged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of washing machines, in particular, relates to a control method of a washing machine and the washing machine. BACKGROUND

[0002] The washing machine in the prior art mostly comprises an inner drum and an outer drum which are in communication with each other. When the washing machine is working, the outer drum contains washing water and the inner drum contains laundry to be washed. The washing water can exist between the inner drum and the outer drum. With the increase of working time of the washing machine, dirt and lint carried by the washing water will be retained in the space between the inner drum and the outer drum, and it is difficult to clean, resulting in bacteria and odor for years of use. To solve this problem, the prior art proposes a washing machine without a dehydration hole on the inner drum, so that the inner drum can independently contain washing water during the washing process. However, at the same time, the existing drainage method cannot realize the drainage of the holeless inner drum.

[0003] The Chinese patent with the application number 201610767640.4 discloses a washing machine without water between the inner drum and the outer drum, comprising: an outer drum; an inner drum rotatably arranged in the outer drum; during washing / rinsing, the inner drum contains water, and there is no water between the inner drum and the outer drum; a drainage hole is formed in the bottom of the inner drum, and a drainage sealing device is arranged on the outer wall of the bottom of the inner drum corresponding to the drainage hole; during washing / rinsing, the drainage sealing device keeps the drainage hole closed, and during dehydration, the drainage sealing device is opened under the action of centrifugal force. The drainage sealing device comprises a sealing device and a centrifugal device. During dehydration, the sliding block of the centrifugal device moves under the action of centrifugal force, drives the plug body of the sealing device to move, and opens the drainage hole.

[0004] However, in the above-mentioned scheme, only the driving of the inner drum to rotate at high speed during dehydration is disclosed, so as to open the sealing device by the centrifugal force generated by the sliding block, thereby realizing the drainage of water in the inner drum. However, in actual use, if the inner drum is quickly raised to high speed, the sliding block will be subjected to a large centrifugal force in an instant and slide rapidly, so that the sliding block hits the limiting protrusion at the end of the sliding track at a large speed. After the sliding block hits, it may move reversely under the action of impact force, causing the drainage hole to be closed again, affecting the drainage and dehydration effect, and seriously, the drainage sealing device may be damaged, affecting the use of the washing machine.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The technical problems to be solved by the present application are to overcome the deficiencies of the prior art, and to provide a control method of a washing machine and the washing machine, wherein a centrifugal drainage device is arranged on an inner tub of the washing machine, and during drainage, the inner tub is controlled to rotate at a low speed for a certain time length, and then the speed is increased to a rotating speed at which the centrifugal drainage device can open a drainage port, so as to avoid that the inner tub is directly accelerated to a higher rotating speed, and the centrifugal drainage device is subjected to a larger centrifugal force in an instant to cause violent action, and further damage to the centrifugal drainage device.

[0007] To solve the above technical problems, the basic idea of the technical solution of the present application is:

[0008] A control method of a washing machine, the washing machine comprising:

[0009] an inner tub, a drainage port is arranged on a tub bottom of the inner tub;

[0010] a centrifugal drainage device, which blocks the drainage port during washing / rinsing to make the inner tub independently hold water;

[0011] The washing machine performs a drainage operation, comprising: controlling the inner tub to rotate at a buffer rotating speed V1 for a certain time length, and the centrifugal drainage device keeps blocking the drainage port; and then controlling the inner tub to increase the rotating speed to reach or exceed a first set rotating speed V 01 , and the centrifugal drainage device opens the drainage port to perform drainage.

[0012] Further, the drainage operation specifically comprises:

[0013] a drainage buffer stage, the inner tub is controlled to increase the rotating speed from static to the buffer rotating speed V1 at a first acceleration a1 and keep, and the duration of the drainage buffer stage is T 11 ;

[0014] a drainage stage, the inner tub is controlled to increase the rotating speed from the buffer rotating speed V1 to a drainage rotating speed V2 at a second acceleration a2 and keep, and the duration of the drainage stage is T 12 ;

[0015] wherein the drainage rotating speed V2 is greater than the first set rotating speed V 01 , and the first acceleration a1 is less than the second acceleration a2.

[0016] Further, the duration of the drainage buffer stage T 11 is less than the duration of the drainage stage T 12 .

[0017] Further, the drainage stage further comprises:

[0018] an inertia drainage stage, the inner tub is stopped to be driven, and the inner tub continues to rotate under the action of inertia and the rotating speed gradually decreases, and the duration of the inertia drainage stage is T 13 ;

[0019] The water draining brake phase controls the inner drum to stop rotating;

[0020] Preferably, the duration of the inertia water draining phase is T 13 greater than the duration of the water draining phase T 12 .

[0021] Further, after the water draining operation, the washing machine performs a spin-drying operation, including:

[0022] The spin-drying buffer phase controls the inner drum to rotate at a buffer speed V1 for a certain duration, and the centrifugal water draining device keeps the state of blocking the water outlet;

[0023] The drum bottom spin-drying phase controls the inner drum to increase the rotating speed to reach or exceed the first set rotating speed V 01 , the centrifugal water draining device opens the water outlet, and the water in the inner drum is drained through the water outlet;

[0024] The drum wall spin-drying phase controls the inner drum to increase the rotating speed to reach or exceed the second set rotating speed V 02 , and the water in the inner drum rises along the drum wall of the inner drum and is drained from the spin-drying holes in the upper area of the drum wall.

[0025] Further, in the spin-drying buffer phase, the inner drum is controlled to increase the rotating speed from zero to the buffer speed V1 at a first acceleration a1 and keep the buffer speed V1, and the duration of the spin-drying buffer phase is T 21 ;

[0026] After the spin-drying buffer phase, the drum bottom spin-drying phase is entered, and the inner drum is controlled to increase the rotating speed from the buffer speed V1 to the first spin-drying speed V 31 at a second acceleration a2;

[0027] The first spin-drying speed V 31 is greater than or equal to the first set rotating speed V 01 , and less than the second set rotating speed V 02 ;

[0028] The first acceleration a1 is less than the second acceleration a2.

[0029] Further, the centrifugal water draining device includes:

[0030] A valve plug for blocking the water outlet;

[0031] A centrifugal mechanism that moves under the action of centrifugal force generated by the rotation of the inner drum;

[0032] A transmission mechanism connected with the centrifugal mechanism and the valve plug, which drives the valve plug to move upward to open the water outlet through the movement of the centrifugal mechanism;

[0033] When the washing machine performs a draining operation, the inner tub is controlled to rotate at a draining rotational speed V2, so that the centrifugal mechanism drives the sealing plug body to move upward to open the drain port through the transmission mechanism; the draining rotational speed V2 is greater than the first dewatering rotational speed V 31 .

[0034] Further, the tub bottom draining phase specifically comprises:

[0035] A first phase, in which the inner tub is controlled to increase the rotational speed from the buffer rotational speed V1 to the first dewatering rotational speed V 31 and keep, the duration of the first phase being T 221 ;

[0036] A second phase, in which the inner tub is controlled to increase the rotational speed from the first dewatering rotational speed V 31 to the second dewatering rotational speed V 32 and keep, the duration of the second phase being T 222 ;

[0037] Wherein, the second dewatering rotational speed V 32 is less than the second set rotational speed V 02 ;

[0038] Preferably, a third phase is further included, in which the inner tub is controlled to increase the rotational speed from the second dewatering rotational speed V 32 to the third dewatering rotational speed V 33 and keep, the duration of the third phase being T 223 ;

[0039] Wherein, the third dewatering rotational speed V 33 is less than the second set rotational speed V 02 .

[0040] Further, in the first phase, the second phase and the third phase, the acceleration of the inner tub when increasing the rotational speed is the same;

[0041] And / or, the duration of the first phase T 221 is greater than the duration of the second phase T 222 , and greater than the duration of the third phase T 223 .

[0042] Another object of the present application is to provide a washing machine adopting the control method of the washing machine as described above.

[0043] After adopting the above technical solution, the present application has the following beneficial effects compared with the prior art.

[0044] In the present application, the centrifugal drainage device is arranged on the inner tub of the washing machine, which can block the drainage port on the inner tub during washing / rinsing to make the inner tub independently hold water, thereby saving the washing water and avoiding the problem of accumulated dirt between the inner and outer tubs in the traditional washing machine. When the washing machine performs the drainage operation, the inner tub is first controlled to rotate at a low speed for a certain time, and then the speed is increased to a higher speed at which the centrifugal drainage device can open the drainage port, thereby avoiding that the centrifugal drainage device is subjected to a large centrifugal force in an instant when the inner tub is directly accelerated to a high speed, and further avoiding the damage of the centrifugal drainage device.

[0045] In the present application, the washing machine is first accelerated to a buffer speed at a lower acceleration for a certain time, and then accelerated to a speed at which the centrifugal drainage device can open the drainage port at a higher acceleration, which can ensure the stable start of the inner tub, avoid the large motion of the centrifugal drainage device in a short time, and further reduce the time required for the speed-up of the inner tub as much as possible, thereby saving the drainage time of the washing machine.

[0046] In the present application, when the washing machine performs the dehydration operation, the inner tub is first controlled to rotate at a low speed for a certain time, which can ensure the stable start of the inner tub and avoid the large motion of the centrifugal drainage device. Then, the speed is first increased to the speed at which the centrifugal drainage device opens the drainage port, at which time the water content of the clothes is large and the load quality in the inner tub is large, and the medium-speed dehydration and the outward drainage from the drainage port are more stable. After a certain time, the load quality in the inner tub is reduced, and the inner tub can be further speeded up, so that the drained water rises along the inner tub wall to separate from the clothes, and is drained from the dehydration hole at the upper part of the tub wall, thereby ensuring a high dehydration rate of the clothes.

[0047] In the present application, the valve plug of the centrifugal drainage device moves upward to open the drainage port, and when the inner tub holds water, the water pressure acts on the valve plug to apply a downward force to the valve plug, thereby assisting the valve plug to block the drainage port, and the sealing effect between the valve plug and the drainage port is better. Meanwhile, the drainage speed V2 used for opening the centrifugal drainage device during the drainage of the washing machine is higher than the first dehydration speed V1 used for opening the centrifugal drainage device during the dehydration of the washing machine, which can ensure the effective opening of the drainage port and avoid that the valve plug cannot be effectively opened due to the water pressure, thereby avoiding the situation that the drainage cannot be performed. 31

[0048] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0049] The accompanying drawings, which are part of the present application, serve to provide a further understanding of the present application, and the schematic embodiments of the present application and the descriptions thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the accompanying drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without any creative labor on the basis of the drawings. In the drawings:​

[0050] Figure 1 is a structural schematic diagram of the inner drum flange assembly in the embodiment of the present application;

[0051] Figure 2 is an enlarged structural schematic diagram of A in the embodiment of the present application; Figure 1

[0052] Figure 3 is a structural schematic diagram of the inner drum flange assembly from another perspective in the embodiment of the present application;

[0053] Figure 4 is an enlarged structural schematic diagram of B in the embodiment of the present application; Figure 3

[0054] Figure 5 is a sectional structural schematic diagram of the inner drum flange assembly mounted to the inner drum bottom in the embodiment of the present application (drainage opening blocking state);

[0055] Figure 6 is an enlarged structural schematic diagram of C in the embodiment of the present application; Figure 5

[0056] Figure 7 is a sectional structural schematic diagram of the inner drum flange assembly mounted to the inner drum bottom in the embodiment of the present application (drainage opening opening state);

[0057] Figure 8 is an enlarged structural schematic diagram of D in the embodiment of the present application; Figure 7

[0058] Figure 9 is a flow chart of the washing machine performing the drainage operation in the embodiment of the present application;

[0059] Figure 10 is a flow chart of the washing machine performing the dehydration operation in the embodiment of the present application.

[0060] In the figure: 1, drum bottom; 2, drainage opening; 100, flange body; 200, sealing plug body; 201, sealing cover; 202, support rod; 203, sealing gasket; 300, centrifugal sliding block; 301, avoiding opening; 302, mounting portion; 303, first limiting portion; 401, reversing rod; 402, connecting rod; 403, connecting pin; 404, connecting portion; 500, mounting seat; 501, fixed portion; 502, guide portion; 503, avoiding groove; 600, guide rail; 601, guide rod; 602, spring; 603, guide groove; 604, second limiting portion.

[0061] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. ​​​​DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application but not to limit the scope of the present application.

[0063] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0064] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] Embodiments of the present application provide a washing machine and a control method thereof.

[0066] As shown in Figures 1 to 8 , the washing machine described in the embodiments comprises:

[0067] an inner tub, a drain port 2 is arranged on the bottom 1 of the inner tub;

[0068] a centrifugal drainage device, which blocks the drain port 2 during the washing / rinsing process, so that the inner tub can independently hold water, and when the inner tub reaches a certain rotating speed, the centrifugal drainage device is opened under the centrifugal force of the rotation of the inner tub to drain water outward.

[0069] By arranging the centrifugal drainage device on the inner tub, the inner tub can independently hold water during the washing / rinsing process, thereby avoiding the situation that water is stored between the inner and outer tubs in the traditional washing machine, saving the water consumption during the washing process. At the same time, since there is no water stored between the inner and outer tubs, the problem of accumulated dirt between the two is also prevented, avoiding secondary pollution to the laundry.

[0070] Specifically, in the washing machine of the embodiments, an inner tub flange assembly is mounted below the inner tub, and the inner tub flange assembly specifically comprises:

[0071] a flange body 100, which is coaxially arranged with the inner tub and fixedly mounted on the bottom 1 of the inner tub;

[0072] and the centrifugal drainage device described above is mounted on the flange body 100.

[0073] The centrifugal drainage device comprises:

[0074] The sealing plug 200 is used to block the drain port 2.

[0075] The centrifugal mechanism is moved by the centrifugal force generated by the rotation of the inner drum.

[0076] The transmission mechanism is connected with the centrifugal mechanism and the sealing plug 200, and drives the sealing plug to move to open the drain port 2 through the movement of the centrifugal mechanism.

[0077] In detail, the centrifugal mechanism is a centrifugal sliding block 300, which slides radially along the flange body 100 under the action of the centrifugal force.

[0078] The transmission mechanism is a reversing transmission mechanism, which connects the sealing plug 200 and the centrifugal sliding block 300, and converts the radial sliding of the centrifugal sliding block 300 along the flange body 100 into the movement of the sealing plug 200 along the direction parallel to the central axis of the flange body 100.

[0079] In the above scheme, the centrifugal drainage device is integrated on the flange body 100 as a whole, which is compact in structure and small in space occupation, avoids the case that the centrifugal drainage device occupies a large space below the inner drum, and is beneficial to the expansion of the inner drum. Figures 5 to 8 As shown in the figure, the flange body 100 and the centrifugal drainage device can be pre-assembled to form an inner drum flange assembly with a whole structure, and then can be directly installed below the inner drum of the washing machine.

[0080] In this embodiment, by setting the reversing transmission mechanism, the radial sliding of the centrifugal sliding block 300 along the flange body 100 is converted into the movement of the sealing plug 200 along the direction parallel to the central axis of the flange body 100, so that the sealing plug 200 can move along the direction parallel to the central axis of the flange body 100 to block the drain port 2, and the sealing effect is better.

[0081] Further, the sealing plug 200 is slidably mounted on the flange body 100 along the direction parallel to the central axis of the flange body 100, and the sliding path of the sealing plug 200 and the sliding path of the centrifugal sliding block 300 are located on the same plane.

[0082] The reversing transmission mechanism comprises a reversing lever 401, one end of which is hingedly connected to the sealing plug body 200, and the other end of which can move along the radial direction of the flange body 100 under the driving of the centrifugal slider 300. The reversing lever 401 swings in the plane formed by the sliding paths of the centrifugal slider 300 and the sealing plug body 200, and drives the sealing plug body 200 to move along the direction parallel to the central axis of the flange body 100.

[0083] Preferably, the distance between the sealing plug body 200 and the central axis of the flange body 100 is smaller than the distance between the centrifugal slider 300 and the central axis of the flange body 100. By arranging the centrifugal slider 300 closer to the edge of the flange body 100, the distance between the centrifugal slider 300 and the central axis of the flange body 100 is increased, and under the condition that the mass of the centrifugal slider 300 is constant, a greater centrifugal force can be provided at the same rotational speed due to the larger rotational radius, thereby avoiding the situation that the centrifugal slider 300 cannot drive the sealing plug body 200 to move.

[0084] In the embodiment, the centrifugal slider 300 moves away from the central axis of the flange body 100, and drives the end of the reversing lever 401 hingedly connected to the sealing plug body 200 to move away from the flange body 100.

[0085] The reversing transmission mechanism further comprises a connecting rod 402, one end of which is fixedly connected to the centrifugal slider 300, and the other end of which is hingedly connected to the end of the reversing lever 401 away from the sealing plug body 200, thereby driving the end of the reversing lever 401 away from the sealing plug body 200 to move along the radial direction of the flange body 100.

[0086] Preferably, the end of the connecting rod 402 connected to the reversing lever 401 is provided with a connecting portion 404, a first pin hole is formed in the connecting portion 404, a second pin hole is formed in the end of the reversing lever 401 connected to the connecting rod 402, and a connecting pin 403 is rotatably inserted into the first pin hole and the second pin hole to connect the connecting rod 402 and the reversing lever 401.

[0087] In the embodiment, the connecting rod 402 and the centrifugal slider 300 are in an integral structure.

[0088] In the above scheme, the reversing transmission mechanism is composed of the hingedly connected reversing lever 401 and the connecting rod 402, the connecting rod 402 drives the end of the reversing lever 401 to move along the radial direction of the flange body 100 synchronously with the centrifugal slider 300, and the other end of the reversing lever 401 can move up and down along the vertical direction, thereby driving the sealing plug body 200 to move along the vertical direction.

[0089] Preferably, the upper surface of the connecting rod 402 is a concave curved surface gradually increasing in height from inside to outside along the radial direction of the flange body 100. The concave curved surface is used to avoid the sealing plug body 200 and the structure of the tub bottom 1 of the inner tub at the drain port 2, preventing the connecting rod 402 from interfering with the tub bottom 1 of the inner tub.

[0090] In this embodiment, after the flange body 100 is installed with the tub bottom 1 of the inner tub of the washing machine, the sealing plug body 200 blocks the drain port 2 from the inside of the inner tub from top to bottom. During drainage, the centrifugal sliding block 300 drives the sealing plug body 200 to move upward to open the drain port 2 through the reversing transmission mechanism.

[0091] In detail, during drainage, the centrifugal sliding block 300 slides outward along the radial direction of the flange body 100 under the action of centrifugal force, the connecting rod 402 synchronously slides outward, driving the lower end of the reversing rod 401 to move outward. The upper end of the reversing rod 401 is further driven upward by the centrifugal sliding block 300, which in turn drives the sealing plug body 200 to be pushed away from the drain port 2, opening the drain port 2.

[0092] In a further scheme of this embodiment, the sealing plug body 200 includes a sealing cover 201 and a support rod 202, one end of the support rod 202 is fixedly connected with the sealing cover 201, and the other end is hingedly connected with the reversing rod 401.

[0093] Further, the flange body 100 is fixedly provided with a mounting seat 500, the mounting seat 500 includes a fixed part 501 and a guide part 502 with a hollow slide, the hollow slide is arranged to extend along the direction parallel to the central axis of the flange body 100.

[0094] The fixed part 501 is fixedly connected with the flange body 100, one end of the support rod 202 is slidably arranged in the hollow slide of the guide part 502, and the other end extends out of the guide part 502 and is connected with the sealing cover 201.

[0095] Preferably, a sealing gasket 203 is fixedly arranged on the outer periphery of the sealing cover 201, when the sealing plug body 200 blocks the drain port 2, the sealing gasket 203 is sealed and fitted with the outer periphery of the drain port 2, thereby achieving better sealing effect.

[0096] In this embodiment, the sealing plug body 200 blocks the drain port 2 from the inside of the inner tub, when the inner tub is filled with water, the water pressure acts on the upper surface of the sealing cover 201 to provide an auxiliary sealing force, achieving better sealing effect. The arrangement of the guide part 502 limits the movement of the sealing plug body 200 in the horizontal direction, thereby effectively converting the horizontal movement of the centrifugal sliding block 300 into the vertical movement of the sealing plug body 200 through the reversing rod 401.

[0097] In another aspect, the sealing plug 200 is blocked by the sealing cover 201 to the drain port 2, and the swing of the reversing rod 401 pushes the sealing plug 200 upward to open the drain port 2, effectively utilizing the space between the bottom 1 of the inner tub and the impeller, so that the opening height of the drain port 2 after being opened can reach 12 mm, and the washing foreign matters such as buttons, hairpins, coins and lint can be effectively discharged.

[0098] Further, the lower end of the support rod 202 has an open mounting groove, and the upper end of the reversing rod 401 is inserted into the mounting groove and hinged with the support rod 202. The lower end of the guide part 502 has an avoiding groove 503 penetrating the flange body 100 radially, and the upper end of the reversing rod 401 is hinged with the lower end of the support rod 202 inside the guide part 502, and the lower half of the reversing rod 401 extends out of the guide part 502 through the avoiding groove 503 when the sealing plug 200 blocks the drain port 2.

[0099] In a further aspect of the embodiment, the centrifugal slider 300 is a plate structure perpendicular to the central axis of the flange body 100, and the side of the centrifugal slider 300 close to the central axis of the flange body 100 has an inwardly recessed avoiding opening 301, and the avoiding opening 301 has an arc-shaped edge with a radius greater than that of the drain port 2.

[0100] The centrifugal slider 300 has a first position close to the central axis of the flange body 100 as shown in Figure 5 and Figure 6 , and a second position relatively far away from the central axis of the flange body 100 as shown in Figure 7 and Figure 8 . When the centrifugal slider 300 is in the first position, the sealing plug 200 blocks the drain port 2, and when the centrifugal slider 300 slides to the second position, the sealing plug 200 is pushed upward to open the drain port 2. When the centrifugal slider 300 is in the first position, the center of the arc-shaped edge of the avoiding opening 301 coincides with the sliding path of the sealing plug 200.

[0101] For the impeller washing machine, due to the limitation of the maximum speed it can reach, in order to provide sufficient centrifugal force for the centrifugal slider 300 to open the drain port 2, it is necessary to increase the mass of the centrifugal slider 300, that is, to increase the volume of the centrifugal slider 300. In the above-mentioned aspect, the plate structure of the centrifugal slider 300 can be installed on the flange body 100, or an installation opening matching the shape of the centrifugal slider 300 is formed from the outer periphery to the inside of the flange body 100, without occupying additional space below the flange body 100, and the overall structure is compact and occupies small space.

[0102] The setting of the avoiding opening 301 ensures that the centrifugal sliding block 300 does not block the space below the drain port 2 when the drain port 2 is opened, and the drainage process is more smooth. On the other hand, in order to realize better cooperation with the sealing plug body 200, the barrel bottom 1 is protrudingly arranged downward to the inner barrel at the outer periphery of the drain port 2, and the avoiding opening 301 is arranged to realize the avoiding of the barrel bottom 1 protrusion at the drain port 2 when the centrifugal sliding block 300 is in the first position.

[0103] In a further scheme of the embodiment, the flange body 100 is fixedly installed with a guide rail 600, and the centrifugal sliding block 300 is slidably arranged on the guide rail 600.

[0104] Preferably, the edge of the flange body 100 has a concave mounting opening, and the guide rail 600 is arranged in parallel with two guide rails 600 which are fixedly installed on both sides of the mounting opening, and the centrifugal sliding block 300 is arranged between the two guide rails 600.

[0105] Specifically, as shown in Figure 4 the guide groove 603 is arranged on the guide rail 600, and the two sides of the centrifugal sliding block 300 are respectively arranged with the mounting portion 302 which is slidably arranged in the guide groove 603. The first limiting portion 303 is further arranged on the centrifugal sliding block 300, and the second limiting portion 604 is arranged on the guide rail 600, and the first limiting portion 303 and the second limiting portion 604 have opposite surfaces to prevent the centrifugal sliding block 300 from being detached from the guide rail 600 when sliding outwardly to the flange body 100.

[0106] Further, the guide rail 600 is further installed with an elastic member, and the elastic member is used to provide a reset force opposite to the direction of the centrifugal force to the centrifugal sliding block 300.

[0107] Preferably, the guide rail 600 includes the guide rod 601 which is arranged in extension along the sliding direction of the centrifugal sliding block 300, and the centrifugal sliding block 300 is arranged with the positioning hole into which the guide rod 601 is inserted. The elastic member is the spring 602 which is sleeved on the guide rod 601, and the two ends of the spring 602 are respectively abutted against the surface of the centrifugal sliding block 300 and the guide rail 600.

[0108] Specifically, one end of the guide rod 601 is fixed on the surface of the second limiting portion 604 facing the first limiting portion 303, and the other end is suspended. The positioning hole is arranged in penetration on the first limiting portion 303 of the centrifugal sliding block 300, and the suspended end of the guide rod 601 is inserted into the positioning hole. The spring 602 is sleeved on the guide rod 601, and the two ends are respectively abutted against the first limiting portion 303 and the second limiting portion 604.

[0109] When draining, when the inner tub reaches a certain rotating speed, the centrifugal sliding block 300 slides to the outside of the flange body 100 under the action of centrifugal force, overcoming the elastic force of the spring 602, and then drives the sealing plug body 200 to open the drain port 2. In the process of the rotating speed of the inner tub decreasing until stopping, the centrifugal force gradually decreases, and when the centrifugal force acting on the centrifugal sliding block 300 is less than the elastic force of the spring 602, the spring 602 pushes the first limiting portion 303 to the inside of the flange body 100, so that the centrifugal sliding block 300 slides to the inside of the flange body 100, and drives the sealing plug body 200 to block the drain port 2.

[0110] The control method of the washing machine provided in the embodiment is specifically used in the draining process and the dewatering process of the washing machine.

[0111] Specifically, in the draining process, the washing machine performs a draining operation, including: controlling the inner tub to rotate at a buffer rotating speed V1 for a certain time length, and keeping the centrifugal draining device in a state of blocking the drain port; and then controlling the inner tub to increase the rotating speed to reach or exceed a first set rotating speed V 01 , and the centrifugal draining device opens the drain port to drain.

[0112] In the above scheme, the first set rotating speed V 01 is the minimum rotating speed required for the centrifugal draining device to open the drain port 2, that is, under the first set rotating speed V 01 , the centrifugal force acting on the centrifugal sliding block 300 is basically equal to the force that can just drive the centrifugal sliding block 300 to slide outward.

[0113] The washing machine first controls the inner tub to rotate at a lower buffer rotating speed V1 for a certain time length, and then increases the rotating speed to a rotating speed at which the centrifugal draining device can open the drain port 2, instead of directly accelerating to a rotating speed at which the drain port 2 can be opened. In this way, the centrifugal sliding block 300 in the centrifugal draining device is avoided from being subjected to a relatively large centrifugal force and then quickly sliding outward, which may cause the spring 602 to be excessively compressed, resulting in the failure of the centrifugal draining device. Alternatively, the centrifugal sliding block 300 may excessively compress the spring 602, so that when the centrifugal sliding block 300 slides to a certain position, the spring 602 pressure acting on the centrifugal sliding block 300 is greater than the centrifugal force, and the centrifugal sliding block 300 is pushed to slide in the opposite direction, resulting in the drain port 2 being blocked again, which affects the smooth drainage of water.

[0114] The inner tub is controlled to start rotating at a lower rotating speed in the initial stage of the draining process of the washing machine, that is, the inner tub is started slowly, so that the initial stage of the rotation of the inner tub can be stable. After the centrifugal draining device installed on the inner tub and the flange body 100 reaches a stable rotating state, the rotating speed of the inner tub is increased, so that the centrifugal sliding block 300 slides outward, drives the sealing plug body 200 to move upward to open the drain port 2, and the drain port 2 can be stably kept in an open state, so that the water in the inner tub is smoothly drained.

[0115] In a further aspect of the embodiment, as shown in Figure 9 the draining operation specifically comprises:

[0116] a draining buffer stage, in which the inner tub is controlled to be lifted from a stationary speed to a buffer speed V1 at a first acceleration a1 and kept, and the centrifugal draining device keeps the state of blocking the drain port, and the duration of the draining buffer stage is T 11 ;

[0117] a draining stage, in which the inner tub is controlled to be lifted from the buffer speed V1 to a draining speed V2 at a second acceleration a2 and kept, and the centrifugal draining device opens the drain port to drain, and the duration of the draining stage is T 12 .

[0118] wherein the draining speed V2 is greater than a first set speed V 01 , and the first acceleration a1 is less than the second acceleration a2.

[0119] In the embodiment, since the sealing plug 200 moves upward to open the drain port 2, the sealing plug 200 is also subjected to a downward force caused by water pressure in the case of water in the inner tub. Therefore, when the centrifugal slider 300 slides, in addition to overcoming the resistance (including the spring force of the spring 602 and the friction force of the sliding of the centrifugal slider 300, etc.) that the centrifugal slider 300 itself is subjected to, the centrifugal slider 300 also needs to overcome the pressure of the water in the inner tub to lift the sealing plug 200 upward. The draining speed V2 is set to be greater than the first set speed V 01 , which can ensure that the drain port 2 is smoothly opened.

[0120] The washing machine first accelerates to the buffer speed V1 at a lower first acceleration a1, and then accelerates to the draining speed V2 at a higher second acceleration a2 to drain after keeping for a certain duration. The acceleration of the inner tub at the initial stage of rotation is low, which further ensures that the inner tub can be started smoothly. After the rotation state reaches a stable state, the inner tub is accelerated to a speed at which the drain port 2 can be opened at a higher acceleration, which can reduce the time required for the inner tub to be lifted to the speed as much as possible on the premise of avoiding violent action of the centrifugal draining device, thereby saving the draining duration of the washing machine.

[0121] Preferably, the duration T 11 of the draining buffer stage is less than the duration T 12 of the draining stage. The draining buffer stage is mainly used for the smooth start of the inner tub, and the duration does not need to be too long, which can further save the draining duration.

[0122] In the embodiment, the draining stage further comprises:

[0123] The inertia draining phase, the driving of the inner drum is stopped, the inner drum continues to rotate under the action of inertia and the rotating speed gradually decreases, the duration of the inertia draining phase is T 13 ;

[0124] The draining brake phase, the inner drum is controlled to stop rotating.

[0125] Preferably, the duration of the inertia draining phase is T 13 greater than the duration of the draining phase T 12 .

[0126] Specifically, the washing machine drives the inner drum to rotate through a driving device such as a driving motor, after entering the inertia draining phase, the driving motor stops driving, the inner drum is in a free rotating state, can continue to rotate under the action of inertia, but its rotating speed gradually decreases under the action of resistance. In this phase, when the rotating speed of the inner drum is not lower than a first set rotating speed V 01 , the draining port 2 still remains in an open state, can continue to drain water outward. When the rotating speed of the inner drum gradually decreases to be less than the first set rotating speed V 01 , the centrifugal sliding block 300 is reset under the pushing of the spring 602, drives the sealing plug body 200 to block the draining port 2.

[0127] After the inertia draining phase lasts for T 13 , the inner drum is controlled to stop rotating through a braking device, that is, the washing machine is ready to perform the dehydration process after the draining operation.

[0128] The washing machine performs a dehydration operation after the draining operation is completed, as shown in FIG. 8, specifically includes: Figure 10

[0129] The dehydration buffer phase, the inner drum is controlled to rotate at a buffer rotating speed V1 for a certain duration, the centrifugal draining device remains in a state of blocking the draining port;

[0130] The drum bottom dehydration phase, the rotating speed of the inner drum is controlled to be raised to reach or exceed a first set rotating speed V 01 , the centrifugal draining device opens the draining port, and the water in the inner drum is drained through the draining port;

[0131] The drum wall dehydration phase, the rotating speed of the inner drum is controlled to be raised to reach or exceed a second set rotating speed V 02 , the water in the inner drum rises along the drum wall of the inner drum and is drained from the dehydration holes in the upper region of the drum wall.

[0132] In the embodiment, the dehydration buffer phase has a similar effect as the draining buffer phase, and is also used for the smooth start of the inner drum, so that the centrifugal draining device reaches a smooth rotating state together with the inner drum, and then the inner drum continues to raise the speed to make the centrifugal sliding block 300 stably slide outward to open the draining port 2.

[0133] ​The inner barrel's wall gradually slopes outwards from bottom to top, meaning the barrel wall has a conical structure with a diameter that gradually increases from the bottom (1) to the opening. The inner barrel's rotational speed is increased to a higher second set rotational speed V. 02 Afterwards, the water removed from the clothes in the inner tub can flow up along the tub wall under the action of centrifugal force and eventually be discharged from the dewatering hole set on the tub wall near the tub opening.

[0134] The spin-drying process of a washing machine is divided into an initial bottom-drying stage and a later drum-wall-drying stage. Because the clothes contain relatively more water in the initial stage, meaning the inner drum is under heavier load, the spin speed should not be too high; a medium speed is more stable for spin-drying. At the same time, more water is removed, making drainage from the drain outlet 2 at the bottom of the drum more efficient. In the later stage, the clothes contain less water, allowing for a higher drum spin speed to remove more water. Simultaneously, the removed water flows upwards along the drum wall, separating from the clothes, ensuring a higher spin-drying rate.

[0135] In a further embodiment, during the dehydration buffering stage, the inner tub is controlled to increase its rotational speed from rest to a buffer speed V1 with a first acceleration a1 and maintain this speed. The duration of the dehydration buffering stage is T. 21 ;

[0136] After the dehydration buffer stage ends, the bottom dehydration stage begins. The inner drum is controlled to increase its speed from the buffer speed V1 to the first dehydration speed V with a second acceleration a2. 31 .

[0137] Wherein, the first dehydration speed V 31 Greater than or equal to the first set speed V 01 And less than the second set speed V 02 .

[0138] In the above scheme, the acceleration used in the dehydration buffer stage is less than the acceleration used in the bottom dehydration stage. This ensures that the inner tub starts smoothly and does not cause violent movement of the centrifugal drainage device. It also enables the inner tub to accelerate as quickly as possible until the centrifugal drainage device opens the drain outlet 2, thus saving the washing machine's dehydration time.

[0139] In a preferred embodiment, if the current spin-drying process is the first rinse and spin-drying in the washing program run by the washing machine, at the beginning of the spin-drying buffer stage, the drain valve of the washing machine is opened and kept open for a certain period of time to rinse the foam on the surface of the clothes, so that as much foam as possible can be discharged from the inner drum in the subsequent stages of the spin-drying process.

[0140] In the embodiment, when the washing machine performs the dehydration operation, the water in the inner tub has been basically drained, the sealing plug body 200 is no longer subjected to the water pressure, and the centrifugal force acting on the centrifugal sliding block 300 can only overcome the resistance thereof to slide outward, thereby driving the sealing plug body 200 to open the drain port 2. When the washing machine drains water, the centrifugal sliding block 300 needs to overcome the water pressure acting on the sealing plug body 200 to slide outward, and thus the centrifugal force required to open the drain port 2 during the draining is greater than that required to open the drain port 2 during the dehydration.

[0141] When the washing machine performs the draining operation, the inner tub is controlled to rotate at a drain speed V2 to open the drain port 2 to drain water. In the embodiment, the drain speed V2 is set to be greater than the first dehydration speed V 31 , and the centrifugal drainage device can smoothly open the drain port 2 during the draining and the dehydration.

[0142] The lowest speed required for the centrifugal drainage device to open the drain port 2 when the inner tub is empty and the lowest speed required for the centrifugal drainage device to open the drain port 2 when the inner tub is full are obtained through a large number of test experiments. The lowest speed required when the inner tub is empty is the first set speed V 01 , and the drain speed V2 of the inner tub during the draining needs to be greater than or equal to the lowest speed required when the inner tub is full.

[0143] In the preferred scheme of the embodiment, the drain speed V2 is set to be the lowest speed required for the centrifugal drainage device to open the drain port 2 when the inner tub is full, and the first dehydration speed V 31 is set to be the lowest speed required for the centrifugal drainage device to open the drain port 2 when the inner tub is empty, that is, the first set speed V 01 .

[0144] In the initial stage of the draining and the dehydration, the total weight of the load in the inner tub is relatively large, and the inner tub is controlled to rotate at a relatively low speed to ensure that the centrifugal drainage device can open the drain port 2, thereby avoiding obvious vibration caused by the high rotation speed of the inner tub. On the other hand, for the draining, if the rotation speed of the inner tub is too high when the water level in the inner tub is high, the water in the inner tub may be thrown out of the tub opening under the action of the centrifugal force, thereby causing the washing machine to overflow.

[0145] Further, the tub bottom draining stage specifically includes:

[0146] In the first stage, the rotation speed of the inner tub is controlled to be increased from the buffer speed V1 to the first dehydration speed V 31 and maintained, and the duration of the first stage is T 221 .

[0147] In the second stage, the rotation speed of the inner tub is controlled to be increased from the first dehydration speed V 31the second dehydration rotating speed V 32 and keeps, the duration of the second stage is T 222 .

[0148] wherein the second dehydration rotating speed V 32 is less than the second set rotating speed V 02 .

[0149] Preferably, a third stage is further included, the inner drum is controlled to increase the rotating speed from the second dehydration rotating speed V 32 to a third dehydration rotating speed V 33 and keeps, the duration of the third stage is T 223 ;

[0150] wherein the third dehydration rotating speed V 33 is less than the second set rotating speed V 02 .

[0151] In the above scheme, the drum bottom dehydration stage of the washing machine is further divided into multiple stages, and the inner drum is accelerated in stages, so that the inner drum gradually approaches the second set rotating speed V 02 by alternating between acceleration state and constant rotating speed state, avoiding unstable rotation caused by long-term continuous acceleration of the inner drum.

[0152] In the embodiment, the acceleration of the inner drum when increasing the rotating speed in the first stage, the second stage and the third stage is the same, and the second acceleration a2 is adopted. The duration T 221 of the first stage is greater than the duration T 222 of the second stage, and greater than the duration T 223 of the third stage.

[0153] In the control method of the washing machine in the embodiment, only the drainage buffer stage and the dehydration buffer stage adopt the lower first acceleration a1, and the inner drum adopts the higher second acceleration a2 when increasing the rotating speed in other stages, and only two different acceleration values are set in the control logic, which is easier to realize.

[0154] During the drum bottom drainage stage, the inner drum is kept at the lower first dehydration rotating speed V 31 for a long time, so that the water in the clothes is fully drained from the drainage port 2 of the drum bottom 1, and the second stage and the third stage are mainly used for gradually increasing the rotating speed of the inner drum to transition to the drum wall dehydration stage, and the duration is short, which can ensure that the speed-up of the inner drum is stable.

[0155] In the embodiment, the drum wall dehydration stage includes:

[0156] The medium-speed dehydration stage includes several speed-up stages and several speed-down stages arranged between adjacent speed-up stages, wherein the speed-up stage includes a uniform acceleration rotation process in which the rotation speed gradually increases, and a uniform rotation process in which the rotation speed is maintained after the increase;

[0157] The high-speed dehydration stage controls the inner drum to continue to increase the rotation speed from the rotation speed at the end of the medium-speed dehydration stage, and to maintain the rotation speed for a certain time period after the increase, so that the water in the laundry is fully drained, and then the inner drum experiences two processes of increasing the rotation speed and maintaining the rotation speed, wherein the time period of the first process is greater than the time period of the second process, and the high-speed dehydration stage ends.

[0158] After the end of the drum wall dehydration stage, the method further includes:

[0159] The inertia dehydration stage stops driving the inner drum, and the inner drum continues to rotate under the action of inertia and the rotation speed gradually decreases, and the time period of the inertia dehydration stage is T 23 ;

[0160] The dehydration brake stage controls the inner drum to stop rotating.

[0161] In the embodiment, the time period of the inertia dehydration stage is T 23 , and the time period of the inertia drainage stage is T 13 .

[0162] The following Table 1 shows the specific drainage timing and dehydration timing of the washing machine in the embodiment.

[0163] Table 1 Drainage timing and dehydration timing of the washing machine in the embodiment

[0164]

[0165] In the above Table 1, for example, the drainage buffer stage means that the inner drum is controlled to accelerate from static to 30 rpm at an acceleration of 5 rpm / s and maintain the rotation speed, and the time is counted from the start of the rotation of the inner drum, and the total time is 20 s. Similarly, in the drainage stage, the inner drum is controlled to accelerate from 30 rpm to 130 rpm at an acceleration of 10 rpm / s and maintain the rotation speed, and the total time of the drainage stage is 70 s.

[0166] The washing machine using the drainage timing and dehydration timing in the above Table 1 has a minimum rotation speed of 130 rpm for the inner drum to open the drainage port through the centrifugal drainage device in a full load state, and a minimum rotation speed of 110 rpm for the inner drum to open the drainage port through the centrifugal drainage device in an empty load state. During the dehydration process, when the rotation speed of the inner drum is lower than 200 rpm, the water drained from the laundry collects at the bottom of the drum and can be drained from the drainage port at the bottom of the drum; and when the rotation speed of the inner drum reaches or exceeds 200 rpm, the water drained from the laundry can rise along the drum wall under the action of centrifugal force and be drained from the dehydration hole at the upper region of the drum wall.

[0167] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above-mentioned technical content with slight changes or equivalent embodiments, without departing from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, still belongs to the scope of the present application.

Claims

1. A control method of a washing machine, the washing machine comprising: an inner tub, a drain port being provided on a tub bottom of the inner tub; a centrifugal drainage device, the centrifugal drainage device blocking the drain port during a washing / rinsing process so that the inner tub is independently filled with water; The laundry machine performs a draining operation, comprising: controlling the inner drum to rotate at a buffering rotating speed V1 for a certain time length, and the centrifugal draining device keeps the state of blocking the draining port; then controlling the inner drum to increase the rotating speed to reach or exceed a first set rotating speed V 01 , and the centrifugal draining device opens the draining port to drain water.

2. The control method of the washing machine according to claim 1, characterized in that, the draining operation specifically comprising: The water draining buffering phase is to control the inner drum to be lifted from static to a buffering rotating speed V1 with a first acceleration a1 and keep, and the duration of the water draining buffering phase is T 11 ; In the draining phase, the inner tub is controlled to increase the rotating speed from the buffering rotating speed V1 to the draining rotating speed V2 at the second acceleration a2 and keep, and the duration of the draining phase is T 12 ; Wherein, the drainage rotation speed V2 is greater than the first set rotation speed V 01 , and the first acceleration a1 is less than the second acceleration a2.

3. The control method of the washing machine according to claim 2, characterized in that, The duration of the drainage buffer phase is T 11 The duration of the drainage phase is T 12 .

4. The control method of the washing machine according to claim 3, characterized in that, the draining phase further comprising: The inertia draining phase, the driving of the inner barrel is stopped, the inner barrel continues to rotate under the action of inertia and the rotating speed gradually decreases, the duration of the inertia draining phase is T 13 ; a draining braking phase, the inner tub being controlled to stop rotating.

5. The control method of the washing machine according to claim 4, characterized in that, The duration of the inertial draining phase is T 13 The duration of the inertial draining phase is T 12 .

6. The control method of a washing machine according to any one of claims 1 to 5, characterized in that, After the draining operation is completed, the washing machine performs a spinning operation, comprising: a spinning buffering phase, the inner tub being controlled to rotate at a buffering rotating speed V1 for a certain time duration, the centrifugal drainage device being kept in a state of blocking the drain port; In the dehydration stage of the bottom of the barrel, the rotation speed of the inner barrel is controlled to reach or exceed the first set rotation speed V 01 , the centrifugal drainage device opens the drainage port, and the water in the inner barrel is discharged through the drainage port; The dehydration phase of the tub wall, the rotation speed of the inner tub is controlled to reach or exceed the second set rotation speed V 02 The water in the inner tub rises along the tub wall of the inner tub and is discharged from the dehydration holes in the upper region of the tub wall.

7. The control method of the washing machine according to claim 6, characterized in that, In the dehydration buffer stage, the inner drum is controlled to be lifted from static to a buffer rotating speed V1 at a first acceleration a1 and kept, and the duration of the dehydration buffer stage is T 21 ; After the dehydration buffer stage ends, the bottom dehydration stage of the inner barrel is entered, and the inner barrel is controlled to be accelerated from the buffer rotating speed V1 to the first dehydration rotating speed V2 with a second acceleration a2 31 ; Wherein, the first dehydration rotation speed V 31 greater than or equal to the first set rotation speed V 01 , and less than the second set rotation speed V 02 ; the first acceleration a1 being less than the second acceleration a2.

8. The control method of the washing machine according to claim 7, characterized in that, the centrifugal drainage device comprising: a sealing plug body, the sealing plug body being used to block the drain port; a centrifugal mechanism, the centrifugal mechanism being moved by a centrifugal force generated by the rotation of the inner tub; a transmission mechanism, the transmission mechanism being connected with the centrifugal mechanism and the sealing plug body, the sealing plug body being moved upward by the movement of the centrifugal mechanism to open the drain port; When the washing machine performs a draining operation, the inner tub is controlled to rotate at a draining rotational speed V2, so that the centrifugal mechanism drives the sealing plug body to move upward to open the drain port through the transmission mechanism; the draining rotational speed V2 is greater than the first dewatering rotational speed V 31 .

9. The control method of a washing machine according to claim 7 or 8, characterized in that, the tub bottom draining phase specifically comprising: In the first stage, the inner drum is controlled to increase the rotating speed from the buffering rotating speed V1 to the first dewatering rotating speed V 31 and keep the duration of the first stage as T 221 ; In the second phase, the inner basket is controlled to rotate from the first spin speed V 31 to the second spin speed V 32 and remain at the second spin speed V 222 for a duration T Wherein, the second dehydration rotation speed V 32 Less than the second set rotation speed V 02 .

10. The control method of a washing machine according to claim 9, characterized in that, It also includes a third stage, controlling the inner drum from the second dehydration speed V. 32 Increase the speed to the third dehydration speed V 33 And maintain, the duration of the third phase is T. 223 ; Wherein, the third dehydration rotation speed V 33 Less than the second set rotation speed V 02 .

11. The control method of the washing machine according to claim 10, characterized in that, in the first phase, the second phase and the third phase, the acceleration of the inner tub when the rotating speed of the inner tub is increased is the same. and / or, the duration of the first phase T 221 greater than the duration of the second phase T 222 , and greater than the duration of the third phase T 223 .

12. A laundry machine characterized by the control method of the washing machine according to any one of claims 1-11.

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