Washing machine and control method thereof

Abstract

The present application provides a kind of washing machine and its control method.Washing machine includes impeller outer barrel;Impeller inner barrel, the impeller inner barrel is rotatably arranged in the impeller outer barrel;Water bag, the water bag is arranged in the impeller inner barrel, and the water bag has the first state of expansion to the first volume and the second state of contraction to the second volume, and the first volume is greater than the second volume;Water inlet structure, the water inlet structure has first outlet and second outlet, the first outlet is communicated with the water bag, and the second outlet is communicated with the impeller inner barrel;Spraying mechanism.The washing machine and its control method provided by the present application utilize the switching of water bag between the first state and the second state to form a unique water flow in the impeller inner barrel to scatter the clothes, promote the redistribution of the position of the clothes in the impeller inner barrel, avoid the mutual entanglement of the clothes, and also avoid the clothes being always in the upper part of the impeller inner barrel and unable to be washed, thereby effectively improving the washing effect of the washing machine.

Description

TECHNICAL FIELD

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

[0002] The working principle of the impeller washing machine is to rotate the impeller inner drum by the motor to continuously turn the clothes up and down and left and right in the moving water flow to clean the clothes by the friction between the clothes and the clothes and the friction between the clothes and the barrel wall of the impeller inner drum under the action of the detergent.

[0003] The impeller washing machine is not only simple in structure, convenient to maintain and low in price, but also high in washing efficiency. However, as people's living quality is continuously improved, people's requirements for the washing machine are not limited to washing, rinsing, dehydration and other aspects, but also higher and higher in aspects of damage, wrinkle and deformation of the clothes. Since the impeller washing machine is easy to form a unidirectional circulating water flow during washing, the unidirectional circulating water flow and the vortex in the middle of the water flow are easy to cause the clothes to be entangled, resulting in damage, wrinkle and deformation of the clothes. Moreover, due to the entanglement of the clothes, the position of the clothes is relatively fixed during the washing process, especially the position of the clothes above the impeller inner drum cannot reliably participate in the washing process, resulting in the problem of poor washing effect of the impeller washing machine caused by the entanglement of the clothes. SUMMARY

[0004] In order to solve the technical problem of poor washing effect of the impeller washing machine caused by the entanglement of the clothes in the prior art, a washing machine and a control method thereof are provided, which solve the entanglement of the clothes by using the volume change of the water bag and cooperate with the spraying mechanism to spray and flush the clothes above the impeller inner drum to improve the washing effect.

[0005] A washing machine comprises:

[0006] an impeller outer drum;

[0007] an impeller inner drum, which is rotatably arranged in the impeller outer drum;

[0008] a water bag, which is arranged in the impeller inner drum, and has a first state of expansion to a first volume and a second state of contraction to a second volume, the first volume being greater than the second volume;

[0009] a water inlet structure, which has a first outlet and a second outlet, the first outlet being in communication with the water bag, and the second outlet being in communication with the impeller inner drum;

[0010] a spraying mechanism, which is arranged on the impeller inner drum, and has an inlet in communication with the water bag and an outlet facing the inside of the impeller inner drum.

[0011] The spraying mechanism comprises a water drainage structure and a spraying head, the inlet of the water drainage structure is communicated with the water bag, the spraying head is arranged at the outlet of the water drainage structure, and the spraying direction of the spraying head is towards the inside of the impeller inner tub.

[0012] The impeller inner tub and the impeller outer tub form a water storage cavity, the first outlet, the inlet of the water drainage structure and the water bag are all communicated with the water storage cavity.

[0013] The washing machine has an untangling mode:

[0014] When the washing machine switches to the untangling mode, the water bag switches between the first state and the second state, and the impeller inner tub reverses.

[0015] The impeller inner tub and the water storage cavity are provided with a sliding sealing device.

[0016] The washing machine further comprises a control device, the control device can acquire the mass of the impeller inner tub, and the control device is electrically connected with the spraying mechanism.

[0017] The side wall of the water bag is provided with a lifting rib.

[0018] The lifting rib is arranged in a spiral shape on the side wall of the water bag.

[0019] A control method of the above washing machine, comprising:

[0020] The washing machine has a washing mode and an untangling mode:

[0021] When the washing machine switches to the washing mode, the water bag switches between the first state and the second state, the spraying mechanism sprays into the impeller inner tub, and the impeller inner tub rotates forward;

[0022] When the washing machine switches to the untangling mode, the water bag switches between the first state and the second state, the spraying mechanism sprays into the impeller inner tub, and the impeller inner tub reverses.

[0023] The control method further comprises:

[0024] After the washing machine completes the dehydration process, it is judged whether the impeller inner tub is empty or not;

[0025] If yes, the spraying mechanism is controlled to work.

[0026] The washing machine further comprises a control device, the control device can acquire the mass of the impeller inner tub, and the control device is electrically connected with the spraying mechanism, and in the judgment of whether the impeller inner tub is empty or not, further comprising:

[0027] Step S1, obtaining the mass M1 of the pulsator inner tub, and comparing M1 with a preset mass M0;

[0028] Step S2, if M1≤M0, determining that the pulsator inner tub is empty.

[0029] After step S1, further comprising:

[0030] If M1>M0, after a first preset time interval, step S1 is performed again.

[0031] The washing machine has a door cover, after determining whether the pulsator inner tub is empty after the washing machine completes the dehydration process, further comprising:

[0032] Determining whether the door cover is closed;

[0033] If the door cover is closed, controlling the spraying mechanism to work.

[0034] The washing machine and the control method thereof provided by the present application utilize the switching of the water bag between the first state and the second state to form a unique water flow in the pulsator inner tub to scatter the clothes, and promote the re-distribution of the position of the clothes in the pulsator inner tub, thereby avoiding the mutual entanglement of the clothes, and also avoiding the clothes from being always in the upper part of the pulsator inner tub and failing to be washed, so as to effectively improve the washing effect of the washing machine. Since the water bag is filled with water when it is switched from the second state to the first state, the spraying mechanism can spray the water discharged from the water bag when it is switched from the first state to the second state to the inside of the pulsator inner tub, so as to flush the clothes in the upper part of the pulsator inner tub, improve the ability of the clothes in this position to participate in the washing process, further improve the washing effect of the washing machine, and also avoid the waste of water resources and improve the energy efficiency ratio of the washing machine. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A structure diagram of the water bag in the second state in the washing machine provided by the embodiment of the present application;

[0036] Figure 2 A structure diagram of the water bag in the first state in the washing machine provided by the embodiment of the present application;

[0037] Figure 3 A partial view of A in the washing machine provided by the embodiment of the present application; Figure 2

[0038] Figure 4 A control flow chart of the washing machine provided by the embodiment of the present application;

[0039] In the figure:

[0040] ​1, wave drum outer cylinder; 2, wave drum inner cylinder; 3, water bag; 4, water inlet structure; 41, first outlet; 42, second outlet; 5, spraying mechanism; 51, drainage structure; 52, spray head; 11, water storage cavity; 31, lifting rib. DETAILED DESCRIPTION

[0041] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0042] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0043] It should be noted that the terms "first", "second", and the like in the description of the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms used in this way can be interchanged as appropriate, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] It should be noted that in the description of the present application, the terms "up", "down", "left", "right", "in", "out" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the purpose of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In addition, it needs to be explained that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be indirectly connected through intermediate medium, can also be the communication inside two elements. 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.

[0046] The impeller washing machine is provided with an impeller in the impeller inner barrel, and the impeller is driven to rotate by rotating the impeller inner barrel, so as to realize the flow of water in the impeller inner barrel, and then drive the mutual friction between clothes and / or the friction between clothes and the side wall of the impeller inner barrel, and clean under the action of detergent, realize the clean of clothes. It is well known in the industry that the water consumption of the impeller washing machine is large, which causes the waste of water resources. In the prior art, a water bag structure is arranged in the impeller inner barrel of the impeller washing machine to occupy the volume of the impeller inner barrel, thereby reducing the water consumption. Among them, the water bag is full of air when the washing machine starts washing, and is not deflated until the end of washing, that is, the volume of the water bag does not change during washing. The increased water bag structure will further increase the entanglement degree of the clothes, and also increase the relative fixation of the position of the clothes, so that the washing effect of the clothes is poor, especially the clothes on the upper part of the impeller inner barrel cannot participate in the washing, which causes the problem of poor washing effect of the washing machine. Therefore, the present application provides a kind of Figures 1 to 4The washing machine comprises: a pulsator outer drum 1; a pulsator inner drum 2 rotatably arranged in the pulsator outer drum 1; a water bag 3 arranged in the pulsator inner drum 2, and the water bag 3 has a first state of expansion to a first volume and a second state of contraction to a second volume, the first volume is greater than the second volume; a water inlet structure 4 having a first outlet 41 and a second outlet 42, the first outlet 41 communicates with the water bag 3, and the second outlet 42 communicates with the pulsator inner drum 2; a spraying mechanism 5 arranged on the pulsator inner drum 2, and the inlet of the spraying mechanism 5 communicates with the water bag 3, and the outlet of the spraying mechanism 5 faces the inside of the pulsator inner drum 2. By switching the water bag 3 between the first state and the second state, a unique water flow is formed in the pulsator inner drum 2 to scatter the clothes, promote the redistribution of the position of the clothes in the pulsator inner drum 2, avoid the mutual entanglement of the clothes, and also avoid the clothes always being in the upper part of the pulsator inner drum 2 and unable to be washed, thereby effectively improving the washing effect of the washing machine. And since the water bag 3 is filled with water when it is switched from the second state to the first state, the spraying mechanism 5 can spray the water discharged from the water bag 3 when it is switched from the first state to the second state to the inside of the pulsator inner drum 2, thereby flushing the clothes in the upper part of the pulsator inner drum 2, improving the ability of the clothes in this position to participate in the washing process, further improving the washing effect of the washing machine, while avoiding the waste of water resources and improving the energy efficiency ratio of the washing machine.

[0047] In the washing process of the washing machine, the water inlet structure 4 supplies water to the water bag 3 through the first outlet 41, so that the volume of the water bag 3 gradually increases and finally switches to the first state, and then the second outlet 42 of the water inlet structure 4 supplies water to the inner tub 2, at which time the washing machine starts to wash the clothes. In the washing process, the water bag 3 switches from the first state to the second state, and because the volume of the water bag 3 decreases, the water around the water bag 3 will fill the position where the water bag 3 is located, forming a new water flow to scatter the clothes, and at the same time, the clothes wrapped around the water bag 3 will also be unwrapped as the volume of the water bag 3 decreases, thereby avoiding the problem of poor washing effect caused by the clothes being wrapped. Moreover, when the water bag 3 switches from the first state to the second state, the water in the water bag 3 will be transported to the spraying mechanism 5 and finally sprayed into the inner tub 2, thereby washing the clothes on the upper part of the inner tub 2, that is, making full use of the water in the water bag 3 and improving the washing effect of the clothes. In order to avoid the water and clothes in the inner tub 2 from hindering the switching of the water bag 3 to the first state, therefore, between the water supply to the inner tub 2 (that is, the second outlet 42 is opened to supply water to the inner tub 2), the first outlet 41 is used to supply water to the water bag 3 first, so as to ensure that the water bag 3 can reach the best position in the inner tub 2 and smoothly switch to the first state. A flow meter is arranged between the first outlet 41 and the water bag 3, and the flow meter is used for flow detection. When the flow detected by the flow meter reaches a set value, it is judged that the water bag 3 has been filled and smoothly switched to the first state, at which time the first outlet 41 is closed and the second outlet 42 is opened.

[0048] As an embodiment, the spraying mechanism 5 comprises a drainage structure 51 and a spraying head 52. The inlet of the drainage structure 51 communicates with the water bag 3, the spraying head 52 is arranged at the outlet of the drainage structure 51, and the spraying direction of the spraying head 52 is towards the inside of the inner tub 2. The drainage structure 51 can pump the water in the water bag 3 to the spraying head 52, that is, it can realize the switching of the water bag 3 from the first state to the second state, and also can provide water with pressure for the spraying head 52, so that the water sprayed from the spraying head 52 can wash the clothes on the upper part of the inner tub 2, thereby improving the washing effect of the clothes at this position. The drainage structure 51 can be selected as a drainage pump.

[0049] In order to facilitate the communication between the water inlet structure 4 and the water bag 3, a water storage cavity 11 is formed between the pulsator inner tub 2 and the pulsator outer tub 1, and the first outlet 41, the inlet of the water drainage structure 51 and the water bag 3 are all communicated with the water storage cavity 11. When the water inlet structure 4 supplies water to the water bag 3, the first outlet 41 sends water into the water storage cavity 11, and then the water is sent into the water bag 3 through the water storage cavity 11 to supply water to the water bag 3, and the water bag 3 can be switched to the first state. When the water drainage structure 51 drains water, the water drainage structure 51 pumps water out of the water storage cavity 11, and the water in the water bag 3 gradually flows into the water storage cavity 11 and is also pumped out, and the water bag 3 is switched to the second state. Since the water bag 3 is only communicated with the water storage cavity 11, and the water bag 3 rotates with the pulsator inner tub 2, only a sliding sealing structure needs to be arranged between the water bag 3 and the water storage cavity 11 to ensure the reliable water inlet and outlet of the water bag 3. That is, a sliding sealing device is arranged between the pulsator inner tub 2 and the water storage cavity 11.

[0050] As shown in Figure 1 The water bag 3 is arranged on the bottom surface of the pulsator inner tub 2, and a side plate is arranged between the bottom surface of the pulsator inner tub 2 and the bottom surface of the pulsator outer tub 1 to enclose the water storage cavity 11. A sliding sealing device is arranged at the position where the end of the side plate contacts the pulsator inner tub 2 to ensure the reliable sealing of the washing machine. A pulsator is further arranged on the bottom surface of the pulsator inner tub 2, and the pulsator can rotate together with the pulsator inner tub 2 to drive the water in the pulsator inner tub 2 to flow. The pulsator surrounds the water bag 3, that is, the center axis of the water bag 3, the center axis of the pulsator and the center axis of the pulsator inner tub 2 are collinear, which reduces the displacement of the water bag 3 in the pulsator inner tub 2 to reduce the clothes winding on the water bag 3 as much as possible, and ensures the reliable operation of the washing machine.

[0051] In order to further improve the unwinding of the clothes, the washing machine has an unwinding mode: when the washing machine is switched to the unwinding mode, the water bag 3 is switched between the first state and the second state, and the pulsator inner tub 2 is reversed. Since the pulsator inner tub 2 rotates in a single direction during normal washing operation of the washing machine, the clothes will also wind in this direction. In order to unwind the clothes, the pulsator inner tub 2 is reversed, and the water flow in the reverse direction drives the clothes to unwind. At the same time, the water bag 3 is continuously switched between the first state and the second state to continuously adjust the position of the clothes, further improving the dispersion effect of the clothes, thereby improving the washing effect of the washing machine.

[0052] In order to further increase the washing effect on the clothes, the side wall of the water bag 3 is provided with a lifting rib 31. The clothes are moved in multiple directions by the lifting rib 31, so that the clothes can not only rotate and rub along the water flow direction, but also move up and down under the action of the lifting rib 31, thereby increasing the rubbing effect of the clothes and facilitating the adjustment of the position of the clothes, avoiding the relative fixation of the position of the clothes, and achieving the purpose of improving the washing effect. Optionally, the lifting rib 31 is spirally arranged on the side wall of the water bag 3. The spiral lifting rib 31 can move up and down synchronously while the clothes rotate along the water flow, ensuring the reliable movement of the clothes.

[0053] The existing washing machine does not clean the inside after completing the dehydration process of the clothes, so that there are problems of residual detergent or other impurities and bacteria in the inside of the washing machine. Therefore, the washing machine provided by the application can spray the water in the water bag 3 to the inside of the impeller inner tub 2 by using the spraying mechanism 5, so as to clean the impeller inner tub 2. The washing machine also includes a control device. The control device is used to determine whether the impeller inner tub 2 is empty at this time. If the impeller inner tub 2 is empty, the impeller inner tub 2 can be cleaned. Otherwise, if there are clothes or the like in the impeller inner tub 2, the impeller inner tub 2 is not cleaned to avoid pollution of the clothes. As an embodiment, the control device can obtain the mass of the impeller inner tub 2. The mass of the impeller inner tub 2 is used to determine whether the impeller inner tub 2 has clothes and water. If the mass of the impeller inner tub 2 is not greater than a preset value, it can be determined that the impeller inner tub 2 is empty, and the impeller inner tub 2 can be cleaned. The control device is electrically connected with the spraying mechanism 5, and the control device controls the spraying mechanism 5 to spray water into the impeller inner tub 2 for cleaning.

[0054] In other embodiments not shown, the control device can also determine whether the impeller inner tub 2 is empty according to one or a combination of the frequency of the motor driving the impeller inner tub 2 to rotate, the pressure sensor below the impeller inner tub 2, and the liquid level sensor in the impeller inner tub 2, and control the spraying mechanism 5 to spray water for cleaning after determining that the impeller inner tub 2 is empty.

[0055] The washing machine also includes a door cover. The door cover can shield the opening of the impeller inner tub 2, so as to avoid water in the impeller inner tub 2 from splashing out of the washing machine. In order to avoid the problem that water splashes out of the washing machine when the spraying mechanism 5 is cleaning, it is also necessary to determine whether the door cover is closed before the control device controls the spraying mechanism 5 to spray water into the impeller inner tub 2 for cleaning. If the door cover is closed, the cleaning can be performed. The determination of whether the door cover is closed can be performed by using a magnetic sensitive switch or a pressure sensitive switch arranged between the door cover and the impeller inner tub 2 or the impeller outer tub 1.

[0056] A control method of the above washing machine, comprising:

[0057] The washing machine has a washing mode and an untangling mode.

[0058] When the washing machine switches to the washing mode, the water bag 3 switches between the first state and the second state, the spraying mechanism 5 sprays into the pulsator inner tub 2, and the pulsator inner tub 2 rotates forward; when the washing machine works normally, the pulsator inner tub 2 rotates to rub the clothes, thereby achieving cleaning, and the switching of the water bag 3 improves the rubbing effect of the clothes and reduces the possibility of the clothes being tangled, and the spraying mechanism can use the water discharged by the water bag 3 to wash the clothes on the upper part of the pulsator inner tub 2, thereby further improving the washing effect.

[0059] When the washing machine switches to the untangling mode, the water bag 3 switches between the first state and the second state, the spraying mechanism 5 sprays into the pulsator inner tub 2, and the pulsator inner tub 2 rotates reversely. Since the pulsator inner tub 2 rotates in a single direction when the washing machine works normally, the clothes are also tangled in this direction, and in order to untangle the clothes, the pulsator inner tub 2 rotates reversely, and the water flow in the reverse direction drives the clothes to untangle, and at the same time, the water bag 3 constantly switches between the first state and the second state to constantly adjust the position of the clothes, thereby further improving the dispersion effect of the clothes and improving the washing effect of the washing machine. Preferably, the pulsator inner tub 2 rotates clockwise in the normal washing mode, and rotates counterclockwise in the untangling mode.

[0060] The control method further comprises:

[0061] After the washing machine completes the dehydration process, it is determined whether the pulsator inner tub 2 is empty;

[0062] If yes, the spraying mechanism 5 is controlled to work, and the water in the water bag 3 and the water storage cavity 11 is used to wash the pulsator inner tub 2, thereby achieving cleaning of the pulsator inner tub 2.

[0063] As an embodiment, the washing machine further comprises a control device capable of obtaining the mass of the pulsator inner tub 2, and the control device is electrically connected with the spraying mechanism 5, and in the determination of whether the pulsator inner tub 2 is empty, the control device further comprises:

[0064] Step S1: obtaining the mass M1 of the pulsator inner tub 2, and comparing M1 with a preset mass M0;

[0065] Step S2: if M1≤M0, it is determined that the pulsator inner tub 2 is empty, and the preset mass M0 can be the mass of the pulsator inner tub 2 when it is empty.

[0066] After step S1, it further comprises:

[0067] If M1>M0, then after a first preset time interval, the step S1 is performed again, wherein the first preset time interval ranges from 10 minutes to 60 minutes, preferably 30 minutes, and the step S1 is repeatedly performed until M1≤M0, at which time the spraying mechanism 5 performs cleaning on the drum 2, ensuring that the washing machine is clean for the next use by the user.

[0068] The washing machine has a door cover, and after the washing machine completes the dehydration process and determines whether the drum 2 is empty, the washing machine further comprises:

[0069] Determining whether the door cover is closed;

[0070] If the door cover is closed, the spraying mechanism 5 is controlled to work. In order to avoid the problem of water splashing out of the washing machine when the spraying mechanism 5 performs cleaning, it is necessary to determine whether the door cover is closed before the spraying mechanism 5 is controlled to spray water into the drum 2 for cleaning. If the door cover is closed, cleaning can be performed. The determination of whether the door cover is closed can be performed by a magnetic sensitive switch, a pressure sensitive switch, or the like, which is arranged between the door cover and the drum 2 or the outer tub 1.

[0071] As a specific control process, the following is specific:

[0072] The washing machine is turned on;

[0073] The drum 2 is weighed;

[0074] The first outlet 41 of the water inlet structure 4 supplies water to the water bag 3, and the flow rate is detected by a flow meter to determine whether the water bag 3 is switched to the first state;

[0075] Then the first outlet 41 is closed, and the second outlet 42 is opened to supply water to the drum 2;

[0076] The normal washing mode is entered, and the drum rotates clockwise, and in this process, the water bag 3 is switched between the first state and the second state once;

[0077] The untangling mode is entered, and the drum rotates counterclockwise, and in this process, the water bag 3 is switched between the first state and the second state once;

[0078] The dehydration process is entered, and the washing is completed;

[0079] Then the drum 2 is weighed again to determine whether the drum 2 is empty;

[0080] If so, it is determined whether the door cover is closed;

[0081] If the door cover is closed, the spraying mechanism is controlled to clean the drum 2.

[0082] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A washing machine, characterized in that: include: Impeller outer cylinder (1); The inner cylinder (2) of the impeller is rotatably disposed inside the outer cylinder (1) of the impeller; Water bladder (3), the water bladder (3) is disposed inside the inner cylinder (2) of the impeller, and the water bladder (3) has a first state of expanding to a first volume and a second state of contracting to a second volume, the first volume being larger than the second volume; The water inlet structure (4) has a first outlet (41) and a second outlet (42), the first outlet (41) is connected to the water bag (3), and the second outlet (42) is connected to the inner cylinder of the impeller (2); A spraying mechanism (5) is provided on the inner cylinder (2) of the impeller, and the inlet of the spraying mechanism (5) is connected to the water bag (3), and the outlet of the spraying mechanism (5) faces the interior of the inner cylinder (2). The spraying mechanism (5) includes a drainage structure (51) and a spray head (52). The inlet of the drainage structure (51) is connected to the water bag (3). The spray head (52) is located at the outlet of the drainage structure (51), and the spraying direction of the spray head (52) is towards the inside of the impeller inner cylinder (2). A water storage cavity (11) is formed between the inner cylinder (2) of the impeller and the outer cylinder (1) of the impeller. The first outlet (41), the inlet of the drainage structure (51) and the water bladder (3) are all connected to the water storage cavity (11). The water sprayed from the spray head (52) can wash the clothes on the upper part of the inner drum (2) of the impeller.

2. The washing machine according to claim 1, characterized in that: The washing machine has an untangling mode: When the washing machine switches to the untangling mode, the water bladder (3) switches between the first state and the second state, and the inner drum (2) of the impeller reverses.

3. The washing machine according to claim 1, characterized in that: A sliding sealing device is provided between the inner cylinder (2) of the impeller and the water storage cavity (11).

4. The washing machine according to claim 1, characterized in that: The washing machine also includes a control device, which is capable of acquiring the mass of the impeller inner drum (2) and is electrically connected to the spray mechanism (5).

5. The washing machine according to claim 1, characterized in that: The side wall of the water bladder (3) is provided with lifting ribs (31).

6. The washing machine according to claim 5, characterized in that: The lifting ribs (31) are spirally arranged on the side wall of the water bladder (3).

7. A control method for a washing machine according to any one of claims 1 to 6, characterized in that: include: The washing machine has a washing mode and an untangling mode: When the washing machine switches to the washing mode, the water bladder (3) switches between the first state and the second state, the spraying mechanism (5) sprays water into the inner drum (2) of the impeller, and the inner drum (2) of the impeller rotates forward. When the washing machine switches to the untangling mode, the water bag (3) switches between the first state and the second state, the spraying mechanism (5) sprays into the inner drum (2) of the impeller, and the inner drum (2) of the impeller reverses.

8. The control method according to claim 7, characterized in that: The control method further includes: After the washing machine completes the spin-drying process, determine whether the inner drum (2) of the impeller is empty; If so, then control the operation of the spray mechanism (5).

9. The control method according to claim 8, characterized in that: The washing machine also includes a control device, which is capable of acquiring the mass of the impeller inner drum (2), and the control device is electrically connected to the spray mechanism (5). The process of determining whether the impeller inner drum (2) is empty also includes: Step S1: Obtain the mass M1 of the inner cylinder (2) of the impeller and compare M1 with the preset mass M0; Step S2: If M1≤M0, then the inner cylinder (2) of the impeller is determined to be empty.

10. The control method according to claim 9, characterized in that: The process after step S1 also includes: If M1 > M0, then after a first preset time interval, step S1 is performed again.

11. The control method according to claim 10, characterized in that: The washing machine has a door cover. After the washing machine completes the spin-drying process and determines whether the inner drum (2) of the impeller is empty, it also includes: Determine if the door is closed; If the door is closed, the spray mechanism (5) is controlled to work.

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