Washing machine and control method thereof

Abstract

The invention discloses a washing machine and a control method thereof, and belongs to the field of washing machines. The washing machine comprises a dewatering barrel, the dewatering barrel comprises a peripheral wall and a bottom wall, the peripheral wall comprises a first peripheral wall section and a second peripheral wall section which are connected, and the second peripheral wall section is connected between the first peripheral wall section and the bottom wall; a drainage groove is formed in the inner wall of the second circumferential wall section, the drainage groove extends in the circumferential direction and is arranged in a sunken mode, and water permeable holes are formed in the inner wall of the drainage groove. The drainage groove extending in the circumferential direction is formed in the second circumferential wall section, the water permeable holes are formed in the inner wall of the drainage groove, and when the dewatering barrel works at a relatively low rotating speed, water dewatered from clothes can be collected into the drainage groove under the gravity of the water and is drained out of the water permeable holes in time, and the dewatering barrel is particularly suitable for being used when the amount of washed clothes is small. Water can be prevented from being repeatedly absorbed by clothes, the water content of the clothes can be reduced, the dewatering effect is improved, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention belongs to the field of washing machines, and in particular, relates to a washing machine and a control method thereof. Background Art

[0002] A washing machine is a cleaning appliance that uses electrical energy to generate mechanical action to wash clothes. Washing machines generally refer to those that use water as the main cleaning liquid, which is different from dry cleaning, which uses special cleaning solutions and is usually done by a dedicated person. Washing machines are usually divided into pulsator washing machines and drum washing machines.

[0003] A pulsator is installed at the bottom of the barrel of a pulsator washing machine. Driven by the pulsator, the water flow in the barrel forms a vortex that sometimes rotates right and sometimes rotates left, driving the fabric to rotate and roll, so that the dirt on the clothes can be removed.

[0004] During the dehydration process of a pulsator washing machine, when the user has a small amount of laundry, the clothes to be dehydrated will gather near the bottom of the dehydration barrel, while the bottom of the dehydration barrel and part of the surrounding walls near the bottom are usually not provided with holes, resulting in that the water released from the clothes during high-speed dehydration cannot be discharged out of the dehydration barrel in time and is easily re-absorbed by the clothes. This will cause a high moisture content in the clothes when a small amount of clothes is dehydrated, affecting the user experience.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and the purpose is to provide a washing machine. By arranging a circumferentially extending drainage groove on the second peripheral wall section and arranging water-permeable holes on the inner wall of the drainage groove, when the dehydration barrel operates at a relatively low rotation speed, the water removed from the clothes can be collected in the drainage groove under its own gravity and discharged from the water-permeable holes in time. It is particularly suitable for when the amount of laundry is small, and can avoid water being repeatedly absorbed by the clothes, which is beneficial to reducing the moisture content of the clothes, improving the dehydration effect, and improving the user experience.

[0007] Another object of the present invention is to provide a control method for a washing machine.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: providing a washing machine, comprising a dehydration barrel, the dehydration barrel comprising a peripheral wall and a bottom wall, the peripheral wall comprising a first peripheral wall section and a second peripheral wall section connected to each other, the second peripheral wall section being connected between the first peripheral wall section and the bottom wall;

[0009] A drainage groove is provided on the inner wall of the second peripheral wall section. The drainage groove extends circumferentially and is concavely arranged. A water-permeable hole is provided on the inner wall of the drainage groove.

[0010] Furthermore, the drainage groove is extended in a wave-shaped curve, and the water-permeable holes are multiple and are arranged at the groove bottom of the drainage groove, passing through the inner wall of the second peripheral wall section, and located at the trough of the drainage groove.

[0011] Furthermore, there are multiple drainage grooves, which are arranged at intervals up and down along the axial direction of the dehydration barrel.

[0012] Furthermore, the crests and troughs of two adjacent drainage grooves are arranged alternately.

[0013] Furthermore, the uppermost drainage groove is arranged at the upper edge of the second peripheral wall section, and the lowermost drainage groove is arranged at the lower edge of the second peripheral wall section.

[0014] Furthermore, the wavelength and amplitude of the uppermost drainage groove and the lowermost drainage groove on the second peripheral wall segment are smaller than the wavelength and amplitude of the remaining drainage grooves;

[0015] Preferably, the drainage grooves are strips, and the wavelength and amplitude of the drainage groove in the middle are twice the wavelength and amplitude of the upper drainage grooves and the lower drainage grooves.

[0016] Furthermore, the axial length of the first circumferential wall section is greater than the axial length of the second circumferential wall section, and a plurality of dehydration holes are provided on the first circumferential wall section.

[0017] Furthermore, the present invention also provides a control method for a washing machine as described above, the control method comprising the following steps:

[0018] S1. During the washing process, step S2 is performed in the last dehydration operation;

[0019] S2, the dehydration bucket works at a preset speed V1, the preset working time T1, and the dehydration bucket works at a preset speed V2, the preset working time T2, where V1 <V2。

[0020] Furthermore, in the step S1, the weight M of the clothes is obtained before washing the clothes; it is determined whether the weight M of the clothes is greater than a preset weight M', and if not, the last dehydration operation is performed in step S2.

[0021] Furthermore, after step S2, the following steps are also included:

[0022] S3, obtaining the moisture content value δ of the clothes;

[0023] S4, determine whether the moisture content value δ of the clothes is less than the preset moisture content value δ′, if not, execute step S2; if yes, the dehydration barrel operates at the preset speed V2.

[0024] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0025] (1) In the present invention, a circumferentially extending drainage groove is provided on the second peripheral wall section, and a water-permeable hole is provided on the inner wall of the drainage groove. When the dehydration barrel operates at a relatively low rotation speed, the water removed from the clothes can be collected in the drainage groove under its own gravity and discharged from the water-permeable hole in time. This is particularly suitable for washing less laundry, and can avoid water being repeatedly absorbed by the clothes, which is beneficial to reducing the moisture content of the clothes, improving the dehydration effect, and improving the user experience.

[0026] (2) In the present invention, the clothes are washed until the last dehydration operation, and the dehydration barrel operates at a preset speed V1 to dehydrate the clothes, so that the dehydrated water is collected at the trough of the drainage groove under its own gravity and discharged from the water permeable holes. Then the speed of the dehydration barrel is increased, and the dehydration barrel operates at a preset speed V2. The centrifugal force on the clothes is increased, which can improve the dehydration efficiency of the clothes, help reduce the moisture content of the clothes, and improve the user experience.

[0027] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0029] Figure 1 It is a schematic diagram of a dehydration barrel in a washing machine of the present invention;

[0030] Figure 2 It is a flow chart of a control method of a washing machine of the present invention;

[0031] Figure 3 It is a flow chart of a control method of a washing machine of the present invention;

[0032] Figure 4 It is a flow chart of a control method of a washing machine of the present invention.

[0033] In the figure: 1, peripheral wall; 11, first peripheral wall section; 111, dewatering hole; 12, second peripheral wall section; 121, drainage groove; 122, water-permeable hole; 2, bottom wall.

[0034] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0036] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 4 As shown, a washing machine described in the present invention includes a dehydration barrel, and the dehydration barrel includes a peripheral wall 1 and a bottom wall 2. The peripheral wall 1 includes a first peripheral wall section 11 and a second peripheral wall section 12 connected to each other, and the second peripheral wall section 12 is connected between the first peripheral wall section 11 and the bottom wall 2.

[0039] A drainage groove 121 is provided on the inner wall of the second peripheral wall section 12 . The drainage groove 121 extends circumferentially and is recessed. A water-permeable hole 122 is provided on the inner wall of the drainage groove 121 .

[0040] In the present invention, by providing the circumferentially extending drainage groove 121 on the second circumferential wall section 12, and providing the water-permeable hole 122 on the inner wall of the drainage groove 121, when the dehydration barrel operates at a relatively low rotation speed, the water removed from the clothes can be collected in the drainage groove 121 under its own gravity and discharged from the dehydration barrel from the water-permeable hole 122 in time. This is particularly suitable for when the amount of laundry is small, and can avoid water being repeatedly absorbed by the clothes, which is beneficial to reducing the moisture content of the clothes, improving the dehydration effect, and improving the user experience.

[0041] The dehydration barrel operates at a relatively low rotation speed, which is compared with the maximum rotation speed of the dehydration barrel.

[0042] Specifically, the washing machine is a pulsator washing machine, which can be a fully automatic pulsator washing machine or a semi-automatic pulsator washing machine. A semi-automatic pulsator washing machine is a double-barrel washing machine, and after washing the clothes, the user needs to take the clothes out and put them into the dehydration system for dehydration. The following takes a fully automatic pulsator washing machine as an example.

[0043] A fully automatic pulsator washing machine generally includes a housing, a control panel, a water tub, a pulsator, a driving device, etc. The control panel is disposed at the upper end of the housing, and a clothing delivery port is disposed at the center of the control panel for delivering clothing; a cover plate that can be opened and closed is also disposed on the control panel for opening or closing the clothing delivery port.

[0044] The pulsator is arranged in the dehydration barrel, and the dehydration barrel is rotatably arranged in the water storage barrel. In order to eliminate abnormal vibration caused by uneven clothing storage, a balance ring is arranged at the upper end of the dehydration barrel. The water storage barrel is arranged in the box body, and a barrel ring is arranged at the upper end of the water storage barrel to prevent water flow between the dehydration barrel and the water storage barrel from overflowing.

[0045] Since the dehydration barrel is large in size and clothes are easily offset, a large centrifugal force will be generated during high-speed dehydration operation, and the vibration and noise generated are also very large. The box body and the water barrel are connected by a suspension rod structure to absorb the noise generated by vibration.

[0046] The driving device is arranged at the lower end of the water holding tub, and the driving device generally comprises a motor and a clutch, wherein the motor is connected to the clutch by transmission, and generally uses a belt drive. The clutch comprises a pulsator shaft and a dehydration shaft, wherein the pulsator shaft is connected to the pulsator, and the dehydration shaft is connected to the dehydration tub.

[0047] During washing, the dehydration barrel does not rotate, and the pulsator rotates forward and reversely. Driven by the pulsator, the water flow in the dehydration barrel forms a vortex that sometimes rotates right and sometimes rotates left, driving the clothes to rotate and tumble; during dehydration, the pulsator and the dehydration barrel rotate in the same direction to dehydrate.

[0048] The bottom of the spin barrel of an existing washing machine and part of the surrounding wall near the bottom of the spin barrel are usually not provided with holes. During the dehydration process, when the amount of laundry is small, the clothes to be dehydrated are gathered near the bottom of the spin barrel. Although part of the water removed from the clothes will be discharged out of the spin barrel, a lot of water will still remain. After the remaining water is thrown out, it adheres to the inner wall of the spin barrel and cannot be discharged from the spin barrel in time. It will be reabsorbed by the clothes, and then thrown out again, and then absorbed by the clothes. This process is continuously repeated, resulting in a high moisture content of the clothes, poor dehydration effect, and affecting user experience.

[0049] The first peripheral wall section 11 , the second peripheral wall section 12 and the bottom wall 2 are coaxially arranged, and the drainage groove 121 is circumferentially extended on the second peripheral wall section 12 .

[0050] The water-permeable holes 122 are arranged through the inner wall of the drainage groove 121. After washing, the clothes need to be dehydrated. When the amount of laundry is small, the dehydration barrel rotates at a high speed, and the clothes are attached to the bottom wall 2 and the second peripheral wall section 12. The water in the clothes is first thrown out into the drainage groove 121, and then discharged from the dehydration barrel from the water-permeable holes 122, and will not be repeatedly absorbed by the clothes, which is conducive to reducing the moisture content of the clothes.

[0051] like Figure 1 As shown, the drainage groove 121 is extended in a wave-shaped curve, and the water-permeable holes 122 are multiple and are arranged at the bottom of the drainage groove 121 , passing through the inner wall of the second peripheral wall section 12 , and located at the trough of the drainage groove 121 .

[0052] In the above scheme, the drainage groove 121 is arranged in a wavy curve shape. During the dehydration process, the dehydration barrel operates at a relatively low rotation speed. The wavy curve-shaped drainage groove 121 guides water to flow to the trough, which can play a role in collecting water. The water-permeable hole 122 is arranged at the trough to facilitate the water in the drainage groove 121 to be discharged from the dehydration barrel.

[0053] Specifically, the drainage groove 121 is circumferentially extended on the second peripheral wall section 12 and is in the shape of a wavy curve as a whole. The drainage groove 121 can be arranged in a plurality of interval curves, and each section is in the shape of a wavy curve, so as to avoid the remaining components arranged on the second peripheral wall section 12, and is conducive to enhancing the strength of the second peripheral wall section 12. The drainage groove 121 has a plurality of crests and troughs, and the permeable holes 122 are arranged at the troughs and the permeable holes 122 are located at the bottom of the drainage groove 121. The drainage groove 121 is arranged in a concave shape and has an opening facing the axis of the dehydration barrel; the inner wall of the drainage groove 121 opposite to the opening is the bottom of the drainage groove 121. The permeable holes 122 are arranged through the inner wall of the second peripheral wall section 12 to facilitate drainage.

[0054] Preferably, the water-permeable hole 122 penetrates the inner wall of the second peripheral wall section 12 along the radial direction of the dehydration barrel.

[0055] During dehydration, the dehydration barrel operates at a relatively low speed, and the water from the clothes will be collected in the drainage groove 121 and discharged in time through the water permeable holes 122, which can reduce the moisture content in the clothes, especially suitable for washing less.

[0056] like Figure 1 As shown, there are multiple drainage grooves 121, which are arranged at intervals up and down along the axial direction of the dehydration barrel.

[0057] Specifically, the plurality of drainage grooves 121 are axially spaced apart on the second circumferential wall section 12, which increases the distribution range of the plurality of drainage grooves 121 and the plurality of water-permeable holes 122, and can enhance the drainage capacity of the second circumferential wall section 12, thereby enhancing the drainage capacity of the dehydration barrel.

[0058] like Figure 1 As shown, the crests and troughs of two adjacent drainage grooves 121 are arranged alternately.

[0059] Specifically, during dehydration, water in the clothes is thrown out in different directions and falls on different positions of the second peripheral wall section 12. The crests and troughs of two adjacent drainage grooves 121 are staggered, which can improve the water collection capacity of multiple drainage grooves 121 and facilitate timely discharge of water from the dehydration barrel through the water permeable holes 122.

[0060] like Figure 1 As shown, the uppermost drainage groove 121 is arranged at the upper edge of the second peripheral wall section 12 , and the lowermost drainage groove 121 is arranged at the lower edge of the second peripheral wall section 12 .

[0061] Specifically, when clothes need to be dehydrated, the clothes are first placed in the dehydration barrel, and the clothes are located on the bottom wall 2 of the dehydration barrel. The dehydration barrel rotates, and the clothes will stick to the second peripheral wall section 12. The clothes may cover different positions of the second peripheral wall section 12, thereby increasing the distribution range of the multiple drainage grooves 121 and the multiple water-permeable holes 122, and enhancing the drainage capacity of the second peripheral wall section 12.

[0062] The uppermost drainage groove 121 is set at the upper edge of the second peripheral wall section 12, so that when the clothes cover the upper edge of the second peripheral wall section 12, the dehydration barrel can also drain the water out of the clothes in time; the lowermost drainage groove 121 is set at the lower edge of the second peripheral wall section 12, so that when the clothes cover the lower edge of the second peripheral wall section 12, the dehydration barrel can also drain the water out of the clothes in time.

[0063] like Figure 1 As shown, the wavelength and amplitude of the uppermost drainage groove 121 and the lowermost drainage groove 121 on the second peripheral wall section 12 are smaller than the wavelength and amplitude of the remaining drainage grooves 121 .

[0064] Preferably, there are three drainage grooves 121 , and the wavelength and amplitude of the middle drainage groove 121 are twice the wavelength and amplitude of the upper drainage groove 121 and the lower drainage groove 121 .

[0065] Specifically, the plurality of drainage grooves 121 are all in the shape of a wave curve, and the wavelength and amplitude of the drainage grooves 121 are different according to the different positions of the drainage grooves 121 on the second peripheral wall section 12 .

[0066] When clothes are stacked together, water in the upper clothes will penetrate into the lower clothes, resulting in more water in the lower clothes. When the dehydration barrel rotates to dehydrate, the clothes at the bottom will throw out a large amount of water, which needs to be discharged in time by the drainage groove 121 and the water-permeable holes 122, that is, more water-permeable holes 122 are needed. In order to increase the troughs where the water-permeable holes 122 can be set, the wavelength and amplitude of the drainage groove 121 set at the second peripheral wall section 12 close to the bottom wall 2 can be reduced, which will increase the peaks and troughs accordingly.

[0067] In order to drain the water from the clothes in time, the wavelength and amplitude of the uppermost drainage groove 121 should be reduced accordingly, thereby increasing the trough where the water-permeable holes 122 can be set.

[0068] like Figure 1 As shown, the axial length of the first circumferential wall section 11 is greater than the axial length of the second circumferential wall section 12 , and a plurality of dehydration holes 111 are provided on the first circumferential wall section 11 .

[0069] Specifically, the plurality of dehydration holes 111 are arranged in an array, and the radial cross section of the second peripheral wall section 12 decreases from top to bottom. When the amount of laundry is large, the laundry will cover the first peripheral wall section 11 and the second peripheral wall section 12 during dehydration, and the plurality of dehydration holes 111 are used to drain the water from the laundry.

[0070] like Figure 2 As shown, the present invention also provides a control method of a washing machine as described above, the control method comprising the following steps:

[0071] S1. During the washing process, step S2 is performed in the last dehydration operation;

[0072] S2, the dehydration bucket works at a preset speed V1, the preset working time T1, and the dehydration bucket works at a preset speed V2, the preset working time T2, where V1 <V2。

[0073] In the present invention, the clothes are washed until the last dehydration operation, and the dehydration barrel operates at a preset speed V1 to dehydrate the clothes, so that the dehydrated water is collected at the trough of the drainage groove under its own gravity and discharged from the water-permeable holes. Then the speed of the dehydration barrel is increased, and the dehydration barrel operates at a preset speed V2. The centrifugal force on the clothes is increased, which can improve the dehydration efficiency of the clothes, help reduce the moisture content of the clothes, and improve the user experience.

[0074] In the step S1, the weight M of the clothes is obtained before washing; it is determined whether the weight M of the clothes is greater than a preset weight M', and if not, the last dehydration operation is performed in step S2.

[0075] Specifically, there are multiple ways to obtain the weight M of the laundry. One way is to use a weight sensor, and the other way is to use a dedicated motor and hardware circuit to cooperate to achieve the automatic weighing function.

[0076] If using a weight sensor for weighing, the weight sensor is provided at the connection between at least one suspension rod and the cabinet and / or at the connection between the suspension rod and the suspension rod seat of the water storage bucket, and can also be provided at the feet of the cabinet.

[0077] The washing machine has a rated capacity M rated, and a preset weight M' = x% M rated, where x% is a preset percentage.

[0078] After putting the laundry into the washing machine, the washing machine obtains the weight M of the put-in laundry. The user selects a washing program, such as normal wash, heavy wash, quick wash, and water level selection, etc. After the user sets the washing program, the washing machine starts to work. It judges whether the laundry weight M is greater than the preset weight M'. If not, it first washes and rinses the laundry, and then performs dehydration. Generally, the laundry will be dehydrated multiple times. During the last dehydration operation, the dehydration tub works at a preset speed V1 for a preset working time T1, and then the dehydration tub works at a preset speed V2 for a preset working time T2, where V1 < V2. If so, it executes the normal washing, rinsing, and dehydration program.

[0079] Among them, judging whether the laundry weight M is greater than the preset weight M' can be executed either before or after the laundry washing and rinsing program.

[0080] V2 is the highest dehydration stable operation speed of the dehydration tub during the dehydration stage, and V1 is the speed when the water removed from the laundry in the dehydration tub can flow downward in the drainage trough by relying on the component of gravity.

[0081] Preferably, V1 = 80% V2.

[0082] When the dehydration tub works at the preset speed V1, the water in the laundry will be thrown out. However, due to the small centrifugal force, the gravity of the water removed from the laundry is greater than the component of the centrifugal force and will not climb upward. It can flow along the drainage trough and gather at the trough of the drainage trough, and drain out of the dehydration tub through the water permeable holes.

[0083] When the dehydration tub works at the preset speed V2, the centrifugal force is large, and some of the water thrown out from the laundry may climb, that is, move upward. The climbing water will be discharged from the dehydration holes on the first circumferential wall section, and some of the thrown-out water will also be directly discharged from the water permeable holes. The remaining thrown-out water will always adhere to the inner wall of the drainage trough under the action of the centrifugal force.

[0084] As Figure 3 shown, after the step S2, the following steps are further included:

[0085] S3. Obtain the moisture content value δ of the laundry;

[0086] S4, determine whether the moisture content value δ of the clothes is less than the preset moisture content value δ′, if not, execute step S2; if yes, the dehydration barrel operates at the preset speed V2.

[0087] Specifically, after step S2, the weight of the clothes after dehydration is detected to obtain the dehydrated clothes weight M″; then according to the clothes moisture content value δ=(dehydrated clothes weight M″-clothing weight M) / M*100%, the clothes moisture content value δ can be obtained.

[0088] It is determined whether the moisture content value δ of the clothes is less than the preset moisture content value δ′. If not, step S2 is executed, and the cycle is continuously performed until the moisture content value δ of the clothes is less than the preset moisture content value δ′. The dehydration barrel works at a preset speed V1, and the water attached to the inner wall of the drainage groove in the last cycle can be collected at the trough and discharged from the water-permeable holes, and the clothes are continued to be dehydrated, and the dehydrated water is also collected at the trough of the drainage groove and discharged from the water-permeable holes; then the dehydration barrel works at a preset speed V2 again.

[0089] like Figure 3 and Figure 4 As shown, in step S4, if yes, the dehydration barrel operates at a preset rotation speed V2.

[0090] When it is determined that the moisture content value δ of the clothes is less than the preset moisture content value δ′, the dehydration barrel is allowed to continue to operate at the preset rotation speed V2 for a period of time to reduce the moisture content value δ of the clothes and improve the user experience.

[0091] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A washing machine, comprising a dehydration barrel, characterized in that: The dehydration barrel comprises a peripheral wall (1) and a bottom wall (2), wherein the peripheral wall (1) comprises a first peripheral wall section (11) and a second peripheral wall section (12) connected to each other, wherein the second peripheral wall section (12) is connected between the first peripheral wall section (11) and the bottom wall (2); A drainage groove (121) is provided on the inner wall of the second peripheral wall section (12); the drainage groove (121) extends in the circumferential direction and is arranged in a concave manner; and a water permeable hole (122) is provided on the inner wall of the drainage groove (121).

2. The washing machine according to claim 1, characterized in that: The drainage groove (121) is extended in a wave-shaped curve shape, and the water-permeable holes (122) are multiple and are arranged at the bottom of the drainage groove (121), passing through the inner wall of the second peripheral wall section (12), and are located at the trough of the drainage groove (121).

3. The washing machine according to claim 2, characterized in that: There are a plurality of drainage grooves (121), which are arranged at intervals up and down along the axial direction of the dehydration barrel.

4. The washing machine according to claim 3, characterized in that: The crests and troughs of two adjacent drainage grooves (121) are arranged alternately.

5. The washing machine according to claim 3, characterized in that: The uppermost drainage groove (121) is arranged at the upper edge of the second peripheral wall section (12), and the lowermost drainage groove (121) is arranged at the lower edge of the second peripheral wall section (12).

6. The washing machine according to any one of claims 3 to 5, characterized in that: The wavelength and amplitude of the uppermost drainage groove (121) and the lowermost drainage groove (121) on the second peripheral wall section (12) are smaller than the wavelength and amplitude of the remaining drainage grooves (121); Preferably, there are three drainage grooves (121), and the wavelength and amplitude of the drainage groove (121) in the middle are twice the wavelength and amplitude of the upper drainage groove (121) and the lower drainage groove (121).

7. The washing machine according to claim 6, characterized in that: The axial length of the first circumferential wall section (11) is greater than the axial length of the second circumferential wall section (12), and a plurality of dehydration holes (111) are provided on the first circumferential wall section (11).

8. A method for controlling a washing machine according to any one of claims 1 to 7, characterized in that: The control method comprises the following steps: S1. During the washing process, step S2 is performed in the last dehydration operation; S2, the dehydration bucket works at a preset speed V1, the preset working time T1, and the dehydration bucket works at a preset speed V2, the preset working time T2, where V1 <V2。 9. The control method according to claim 8, characterized in that: In step S1, the weight M of the clothes is obtained before washing; it is determined whether the weight M of the clothes is greater than a preset weight M', and if not, the last dehydration operation is performed in step S2.

10. The control method according to claim 8, characterized in that: After step S2, the method further includes the following steps: S3, obtaining the moisture content value δ of the clothes; S4, determine whether the moisture content value δ of the clothes is less than the preset moisture content value δ′, if not, execute step S2; if yes, the dehydration barrel operates at the preset speed V2.

Images