CN109518403B

CN109518403B - Drum washing machine and control method thereof

Info

Publication number: CN109518403B
Application number: CN201710850555.9A
Authority: CN
Inventors: 徐文冰
Original assignee: Haier Intelligent Technology R & D Co ltd; Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Current assignee: Haier Intelligent Technology R & D Co ltd; Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Priority date: 2017-09-20
Filing date: 2017-09-20
Publication date: 2022-06-07
Anticipated expiration: 2037-09-20
Also published as: CN109518403A

Abstract

The invention relates to a drum washing machine and a control method thereof. The drum washing machine comprises a shell and an inner drum arranged in the shell, wherein the inner drum comprises an annular front end cover, an inner drum side wall and an inner drum bottom which are sequentially connected, the annular front end cover forms a clothes feeding opening of the inner drum, and a water outlet is formed in the annular front end cover; the inner cylinder is also provided with a first positioning part; still be provided with the door closure of switch on the shell, be provided with the back shaft on the door closure, an inner tube enclosing cover for switch outlet and an inner tube inner cup that is used for switching the mouth is put in to the clothing, the back shaft sets up on the door closure, the equal rotatable installation of inner tube enclosing cover and inner tube inner cup is on the back shaft, the inner tube enclosing cover can slide on the back shaft, still be provided with the actuating mechanism who is used for driving the inner tube enclosing cover to remove on the door closure, the inner tube enclosing cover still is provided with and clamps complex second location portion with first location portion. The annular front end cover of the annular front end cover is capable of reducing the washing water consumption and improving the washing efficiency so as to improve the user experience.

Description

Drum washing machine and control method thereof

Technical Field

The invention belongs to the technical field of washing machines, and particularly relates to a drum washing machine and a control method thereof.

Background

In the prior art, a drum washing machine generally comprises an inner drum and an outer drum which are mutually sleeved, wherein the outer drum is sealed and used for containing water, and the inner drum is used for containing clothes and beating and washing the clothes by rotating the inner drum; meanwhile, the inner barrel is provided with dehydration holes, so that water in the outer barrel flows into the inner barrel through the dehydration holes to soak the clothes in the inner barrel, the water in the inner barrel flows out of the outer barrel through the dehydration holes, and moisture on the clothes in the inner barrel is discharged to the outer barrel through the dehydration holes when the inner barrel rotates at a high speed, so that the aim of washing the clothes is fulfilled. Because the inner cylinder and the outer cylinder are mutually sleeved, dirt is easy to accumulate between the inner cylinder and the outer cylinder in the use process of the washing machine; meanwhile, in the washing mode, more water is stored between the inner barrel and the outer barrel, on one hand, more water needs to be consumed, and on the other hand, the sewage between the inner barrel and the outer barrel easily pollutes clothes, so that the washing efficiency is low and the user experience is poor. The technical problem to be solved by the invention is how to design a drum washing machine which has low water consumption and high washing efficiency so as to improve the user experience.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned drawbacks of the prior art, and provides a drum washing machine and a control method thereof, so as to reduce the amount of water used for washing, and improve the washing efficiency to improve the user experience.

In order to solve the technical problems and achieve the technical effects, the basic design idea of the technical scheme adopted by the invention is as follows:

a drum washing machine comprises a shell and an inner drum arranged in the shell, wherein the inner drum comprises an annular front end cover, an inner drum side wall and an inner drum bottom which are sequentially connected, the annular front end cover forms a clothes throwing opening of the inner drum, and a water outlet is formed in the annular front end cover; the inner cylinder is also provided with a first positioning part; still be provided with the door closure of switch on the shell, be provided with the back shaft on the door closure, be used for the switch the inner tube enclosing cover in outlet and be used for the switch the inner tube inner cup of mouth is put in to the clothing, the back shaft sets up on the door closure, the inner tube enclosing cover with the equal rotatable installation of inner tube inner cup is in on the back shaft, the inner tube enclosing cover can slide on the back shaft, still be provided with on the door closure and be used for the drive the actuating mechanism that the inner tube enclosing cover removed, the inner tube enclosing cover still be provided with first location portion clamps complex second location portion.

The invention also provides a control method of the drum washing machine, which comprises the following steps:

in the water inlet mode, the driving mechanism drives the outer cover of the inner cylinder to move towards the direction of the inner cylinder until the outer cover of the inner cylinder abuts against the annular front end cover to close the water outlet;

in a washing mode, the driving mechanism keeps the outer cover of the inner cylinder against the annular front end cover, and the outer cover of the inner cylinder and the inner cover of the inner cylinder rotate together with the inner cylinder;

in the drainage mode, the driving mechanism drives the outer cover of the inner cylinder to move away from the inner cylinder so as to open the drainage outlet for drainage.

Compared with the prior art, the drum washing machine has the following beneficial effects:

the drainage port is arranged at the annular front end cover, and the telescopic movable inner barrel outer cover corresponding to the drainage port is arranged on the inner side of the door cover, so that the inner barrel outer cover can generate telescopic displacement along the axial direction of the inner barrel relative to the door cover and is correspondingly attached to or separated from the annular front end cover in the telescopic process of the door cover, and the drainage port is blocked, and water stored in the inner barrel is used for normal washing of the drum washing machine; or opening the water outlet and discharging the washing water in the inner cylinder. Therefore, the effects of sealing the inner cylinder in the rotation process of the inner cylinder and opening the water containing valve to normally discharge the water in the inner cylinder when discharging the water are realized, and the aim of normally discharging the water of the drum-type washing machine with double effects of rotating the inner cylinder and containing the water is fulfilled; meanwhile, the inner cover of the inner cylinder can realize corresponding actions of opening or closing a water outlet arranged at the annular front end cover under the action of the driving mechanism, so that the driving mechanism acts to realize the purpose of automatically controlling the water storage or discharge of the inner cylinder of the drum-type washing machine; in addition, the outer cylinder is not required to be sleeved outside the inner cylinder, so that the volume of the inner cylinder is increased, and the washing capacity of the drum washing machine is improved. Simultaneously, first location portion and the cooperation of second location portion can rotate the in-process at inner tube, and inner tube drives inner tube inner cup and inner tube enclosing cover synchronous revolution simultaneously, reduces the friction noise that appears, improves user experience nature.

In order to make the design concept of the technical scheme of the invention clearer and facilitate further understanding of the beneficial effects brought by the technical scheme, the following detailed description of some specific embodiments of the invention is made with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural view of a drum washing machine according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a door of a drum washing machine according to an embodiment of the present invention;

FIG. 3 is a schematic sectional view of the door of the drum type washing machine shown in FIG. 2, illustrating the structure of the door in section D-D according to the embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a rotating shaft according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of an inner barrel in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an outer cover of an inner barrel in an embodiment of the present invention.

The figure is marked with: 1. the inner cylinder comprises an inner cylinder body 2, a shell body 3, an inner cylinder supporting piece 4, a door cover 5, an inner cylinder outer cover 6, an inner cylinder inner cover 7, a water outlet 8, a supporting shaft 9, a wax motor 10, a rotating shaft 11, an inner layer casing 12, a middle layer casing 13, an outer layer casing 14, a water inlet 15, an air inlet 16, an air outlet 17, a sealing part 18, an installation part 101, an annular front end cover 102, an inner cylinder bottom 103, an inner cylinder side wall 104, a first positioning part 51 and a second positioning part.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

Example one

As shown in fig. 1 to 4, the present embodiment describes a drum washing machine, which includes a housing 2, an inner drum 1 is disposed in the housing 2, an axis of the inner drum 1 extends horizontally or is inclined downward from front to back, a front end of the inner drum 1 is an annular front end cover 101 disposed in an opening manner, and a rear end of the inner drum 1 is an inner drum bottom 102 disposed in a sealing manner; the wall of the inner cylinder 1 is not provided with a through hole, so that the inner part of the inner cylinder 1 forms a sealed container only the front part of which is provided with a clothes throwing opening. Meanwhile, the front end of the drum washing machine shell 2 is provided with a door cover 4 which can be opened outwards, so that the annular front end cover 101 is closed after the door cover 4 is closed, and clothes are put into the inner drum 1 from a clothes putting opening arranged on the annular front end cover 101 after the door cover 4 is opened. The rear end of the inner barrel 1 is arranged in the shell 2 of the drum washing machine through the inner barrel supporting piece 3, the inner barrel supporting piece 3 and the rear end of the inner barrel 1 are coaxially arranged, the upper end and the lower end of the inner barrel supporting piece 3 are respectively bent towards the barrel mouth direction at the front end of the inner barrel 1, the bent part at least extends to the middle part of the inner barrel 1, and the upper bent part and the lower bent part are respectively connected with the shell 2 of the drum washing machine through the damping suspension spring and the damping support rod, so that the aim that the inner barrel supporting piece 3 can be arranged in the shell 2 of the drum washing machine in a vibrating manner is fulfilled; meanwhile, a rotating shaft 10 extending axially backward is installed at the center of the inner drum bottom 102, the rotating shaft 10 passes through the inner drum support 3 and is coaxially disposed and engaged with a motor shaft of a driving motor of the drum washing machine to drive the inner drum 1 to rotate, and both the inner drum 1 and the driving motor are fixedly installed on the inner drum support 3. Preferably, the inner cylinder bottom 102 and the driving motor are respectively arranged at two sides of the inner cylinder support 3, the driving motor is fixedly connected with the inner cylinder support 3, a motor shaft of the driving motor passes through the inner cylinder support 3 through a bearing and is coaxially and fixedly connected with the inner cylinder bottom 102, and a driving motor shaft can rotate relative to the inner cylinder support 3, so that the purposes that the inner cylinder 1 and the driving motor are arranged on the inner cylinder support 3 and the inner cylinder 1 can rotate to wash internal clothes under the action of the driving motor alone are achieved.

In the embodiment, a door cover 4 is installed on a shell 2 of the drum washing machine, an inner cylinder outer cover 5 which can stretch towards the direction of an inner cylinder 1 is installed on the inner side of the door cover 4, a water outlet 7 which is communicated with the inside of the inner cylinder 1 is arranged at the annular front end cover 101, and the inner cylinder outer cover 5 can stretch under the action of a driving mechanism to block or open the water outlet 7, so that water contained in the inner cylinder 1 is discharged from the water outlet 7.

The drainage port is arranged at the annular front end cover, and the telescopic movable inner barrel outer cover corresponding to the drainage port is arranged on the inner side of the door cover, so that the inner barrel outer cover can generate telescopic displacement along the axial direction of the inner barrel relative to the door cover and is correspondingly attached to or separated from the annular front end cover in the telescopic process of the door cover, and the drainage port is blocked, and water stored in the inner barrel is used for normal washing of the drum washing machine; or opening the water outlet and discharging the washing water in the inner cylinder.

In this embodiment, the front end and the rear end of the inner barrel 1 are respectively composed of an annular front end cover 101 and an inner barrel bottom 102, the annular front end cover 101 is connected with the inner barrel bottom 102 through an inner barrel side wall 103, the annular front end cover 101 is provided with an opening forming a clothes throwing opening in the middle, the inner barrel bottom 102 covers the end of the inner barrel, so that the inner barrel 1 forms a sealed container with an opening only in the annular front end cover 101; the inner cylinder 1 is a conical cylinder with the diameter gradually narrowing from the annular front end cover 101 to the inner cylinder bottom 102, and a plurality of water outlets 7 are arranged on the periphery of the annular front end cover 101; the inner cylinder outer cover 5 is arranged corresponding to the outer wall of the annular front end cover 101, so that when the inner cylinder outer cover 5 extends and moves towards the direction of the inner cylinder 1, the inner cylinder outer cover 5 is correspondingly attached to the outer wall of the annular front end cover 101 provided with the water outlet 7, and the water outlet 7 is blocked and sealed by the inner cylinder outer cover 5.

Preferably, the inner cylinder 2 is further provided with a first positioning portion 104, and the inner cylinder outer cover 5 is further provided with a second positioning portion 51 which is in clamping fit with the first positioning portion 104, specifically, in the rotating process of the inner cylinder 2, the first positioning portion 104 and the second positioning portion 51 are mutually matched, so that the inner cylinder outer cover 5 can rotate synchronously with the inner cylinder 2, and thus, noise generated between the inner cylinder 2 and the inner cylinder outer cover 5 due to friction can be avoided. The first positioning portion 104 may be a positioning groove, and the second positioning portion 51 may be a positioning block; alternatively, the first positioning portion 104 is a positioning block, and the second positioning portion 51 is a positioning groove. In addition, the first positioning portion 104 may be provided on the annular front end cover 101; alternatively, the first positioning portion 104 is provided at a position where the inner cylinder sidewall 103 is close to the annular front end cover 103.

Through setting up the inner tube into the big, the little toper bucket of one end diameter to set up the outlet in the big mouth end of inner tube, make the inner tube at rotatory in-process, rivers in the inner tube can laminate to the inner tube section of thick bamboo wall under the centrifugal force effect, and flow to the big mouth end of inner tube, realize that the inner tube dewaters the purpose of everywhere rivers of inner tube from the big mouth end outlet outflow inner tube of opening under the centrifugal force effect.

The water flow flowing to the annular front end cover is completely discharged, so that the aim of completely discharging all the water contained in the inner drum of the drum washing machine is fulfilled; in this embodiment, a plurality of water outlets 7 are arranged at the annular front end cover 101, and the water outlets 7 are arranged at equal intervals and angles at the periphery of the annular front end cover 101 so as to discharge water flow at each part of the annular front end cover 101; preferably, each water outlet 7 is arranged at the periphery of the annular front end cover 101, so that each water outlet 7 is arranged at the position where the diameter of the inner cylinder is maximum, and the water outlet 7 is positioned at the position where water flow is converged in the rotation process of the inner cylinder, thereby achieving the purpose of improving the water drainage efficiency of the drum washing machine.

In this embodiment, the annular front end cover 101 is a tapered structure with a diameter gradually increasing from the front part to the rear part of the drum washing machine, the middle opening of the tapered structure forms a clothes feeding opening of the inner drum, and the periphery of the tapered structure is connected with the side wall 103 of the inner drum; the water outlet 7 is arranged on the conical structure and penetrates through the conical structure; preferably, the water outlets 7 are symmetrically distributed on the periphery of the conical structure at equal intervals relative to the center; preferably, each water outlet 7 is arranged at the joint of the annular front end cover 101 and the side wall 103 of the inner cylinder, so that the water outlet 7 is arranged at the position with the largest diameter of the inner cylinder 1, water flows to the water outlet in the rotation process of the inner cylinder and is converged, and the using effect of discharging the water contained in the inner cylinder is realized.

In this embodiment, the center of the inner side of the door cover 4 is connected with the inner cylinder outer cover 5 through the driving mechanism, the inner cylinder outer cover 5 is coaxially arranged with the inner cylinder 1, and the inner cylinder outer cover 5 comprises a sealing part 17 in limit contact with the annular front end cover 101 and an installation part 18 for connecting the sealing part 17 with the driving mechanism.

In this embodiment, the sealing portion 18 is a tapered plate, and the inner wall of the tapered plate is correspondingly attached to the outer wall of the tapered structure forming the annular front end cap 101, so that when the sealing portion 18 is fastened to the annular front end cap 101, the sealing portion 18 blocks the water outlet 7 of the annular front end cap 101; preferably, the diameter of the large opening end of the conical plate forming the inner cylinder outer cover sealing part 18 is greater than or equal to the diameter of the outer periphery of the annular front end cover 101, the diameter of the small opening end of the conical plate is less than or equal to the diameter of the inner periphery of the annular front end cover 101, and the taper of the inner wall of the conical plate is equal to that of the outer wall of the conical structure, so that when the inner cylinder outer cover 5 is buckled on the outer side of the annular front end cover, the inner cylinder outer cover 5 completely covers and is in contact with the annular front end cover 101 in a fitting manner, and the purpose of sealing the water outlet arranged on the annular front end cover is achieved.

In this embodiment, the mounting portion of the outer cover 5 of the inner cylinder is a vertically arranged disc plate, the outer periphery of the disc plate and the inner periphery of the tapered plate forming the sealing portion 17 are arranged in the same size and are correspondingly and hermetically connected, and the center of the disc mounting portion 18 is connected with the driving mechanism, so that the sealing portion 17 is driven by the mounting portion 18 to move telescopically along the axis of the inner cylinder under the action of the driving mechanism. Preferably, the sealing portion 17 and the mounting portion 18 are integrally formed, and each portion of the inner and outer covers 5 is integrally formed, so as to improve the structural strength of the inner and outer covers.

In this embodiment, the driving mechanism is a wax motor 9, the wax motor 9 is installed in the center of the inner side of the door cover 4, the output end of the wax motor 9 extends axially along the inner cylinder 1 and is connected with the outer cover 5 of the inner cylinder, so that the output end of the wax motor 9, which can move in a telescopic manner, drives the outer cover 5 of the inner cylinder to move in a telescopic manner towards the annular front end cover 101, and the water outlet 7 is blocked or opened by the outer cover 5 of the inner cylinder. The extending and contracting direction of the output end of the wax motor 9 is parallel to the axis of the inner cylinder 1, so that the outer cover 5 of the inner cylinder moves along the axis of the inner cylinder 1 under the driving of the wax motor 9.

The wax motor is arranged on the door cover, and the telescopic end of the wax motor is fixedly connected with the outer cover of the inner cylinder, so that the wax motor drives the outer cover of the inner cylinder to generate displacement far away from or close to the annular front end cover, the purpose of blocking, sealing or far away from and opening a water outlet arranged on the annular front end cover is realized, and the double effects of water storage and washing in the inner cylinder and water discharge in the inner cylinder are further achieved.

In the embodiment, when the drum washing machine is in a washing state, a clothes feeding opening formed in the annular front end cover 101 is sealed by the inner cylinder inner cover 6, the wax motor 9 pushes the inner cylinder outer cover 5 to move towards the direction close to the annular front end cover 101, the inner cylinder outer cover 5 is in contact with the annular front end cover 101 in a fit manner, the inner cylinder outer cover 5 blocks the water outlet 7, water inlet in the inner cylinder 1 is contained in the inner cylinder 1, the inner cylinder rotates, and clothes are washed by utilizing water stored in the inner cylinder; when the drum washing machine is in a drainage state, the wax motor 9 pulls the inner barrel outer cover 5 to move in a direction away from the annular front end cover 101, the inner barrel outer cover 5 is separated from the annular front end cover 101, a drainage port 7 arranged at the inner barrel opening 101 is opened, the inner barrel 1 rotates, and water contained in the inner barrel 1 flows to the drainage port 7 by utilizing the centrifugal force in the rotation process of the inner barrel 1 and is drained from the opened drainage port 7.

Example two

As shown in fig. 1, in this embodiment, the door cover 4 is further provided with an inner drum inner cover 6, the inner drum inner cover 6 is connected to the door cover 4 through an elastic mechanism, so that the elastic mechanism applies an elastic force to the inner drum inner cover 6 after the door cover 4 is closed, and drives the inner drum inner cover 6 to be fastened at the clothes throwing-in opening of the annular front end cover 101, so that the clothes throwing-in opening of the annular front end cover 101 is hermetically fastened by the inner drum inner cover 6, thereby realizing inner sealing of the inner drum, allowing water to be fed for containing, and driving the inner drum to rotate to utilize the water to wash clothes.

In this embodiment, the inner barrel outer cover 5 and the inner barrel inner cover 6 are sequentially mounted on the inner side of the door cover 4 through the support shaft 8, one end of the support shaft 8 is fixed to the center of the inner side of the door cover, and after the support shaft 8 passes through the inner barrel outer cover 5, the other end is rotatably hinged to the center of the inner barrel inner cover 6, so that the inner barrel inner cover 6 is hermetically fastened to the annular front end cover 101 and then can rotate together with the inner barrel 1.

In the embodiment, the end part of the support shaft 8 is fixedly connected with the door cover 4 through a spring, the inner cover of the inner cylinder is in contact with the outer side wall of the annular front end cover 101 after the door cover 4 is buckled, and the spring is in a compressed state; the spring in a compressed state exerts an elastic force on the support shaft 8, and the elastic force is transmitted by the support shaft 8 to push the inner cylinder inner cover 6 to move towards the annular front end cover 101, so that the inner cylinder inner cover 6 is correspondingly and tightly attached to the annular front end cover 101, and the purpose of sealing and attaching the inner cylinder inner cover 6 to the annular front end cover 101 is achieved; meanwhile, the inner cylinder cover 6 covers the clothes input opening arranged on the annular front end cover 101, so that the clothes input opening is sealed when the inner cylinder cover 6 is tightly attached to the outer wall of the annular front end cover 101. Preferably, the inner cylinder inner cover 6 is coaxially arranged with the annular front end cover 101, and the diameter of the outer periphery of the inner cylinder inner cover 6 is larger than that of the clothes throwing opening arranged on the annular front end cover 101.

EXAMPLE III

As shown in fig. 1 and 4, in the present embodiment, the center of the inner cylinder bottom 102 is installed on the inner cylinder support 3 through the rotating shaft 10, so that the inner cylinder 1 can rotate around the axis of the inner cylinder 1 under the action of the driving motor installed at the end of the rotating shaft 10; the rotating shaft 10 is hollow, one end of the hollow part is communicated with the inner cylinder 1 of the roller washing machine, and the other end of the hollow part is communicated with the water inlet pipe of the roller washing machine, so that water can enter the inner cylinder 1 of the roller washing machine from the hollow part of the rotating shaft 10.

In this embodiment, the rotating shaft 10 is formed by three layers of sleeves sleeved in sequence from inside to outside, a water inlet 14 communicated with a water inlet pipe of the drum washing machine and forming an inner cylinder is formed inside the inner sleeve 11, a flow passage between the inner sleeve 11 and the middle sleeve 12 forms an air inlet 15 of the inner cylinder, and a flow passage between the middle sleeve 12 and the outer sleeve 13 forms an air outlet 16 of the inner cylinder.

The rotating shaft at the rear part of the inner barrel is provided with the three layers of sleeves, so that the rotating shaft at the center of the rear part of the drum washing machine integrates the triple functions of water inlet, air inlet and air outlet, and the drum washing machine has a more compact structure and more reasonable and optimized internal part.

Example four

The present embodiment is different from the first embodiment in that: the driving mechanism comprises an electromagnet arranged on the door cover, the outer cover of the inner cylinder is provided with a magnet, the magnet and the electromagnet are arranged correspondingly, and the magnetic driving force generated by the electromagnet drives the outer cover of the inner cylinder to stretch and move by changing the power-on and power-off states of the electromagnet, so that the water outlet is blocked or opened by the outer cover of the inner cylinder (not shown in the attached drawing).

In the embodiment, the electromagnet can apply a repulsion force towards the inner cylinder to the inner cylinder outer cover so as to push the inner cylinder outer cover to be attached to the annular front end cover, so that a water outlet arranged on the annular front end cover is blocked by the inner cylinder outer cover; the electromagnet can also apply a suction force to the outer cover of the inner cylinder in the opposite direction of the inner cylinder so as to pull the outer cover of the inner cylinder to be separated from the annular front end cover and open a water outlet arranged on the annular front end cover.

The electromagnet is arranged on the door cover of the drum washing machine, so that the magnetic driving acting force with changeable directions is applied to the inner drum outer cover, the inner drum outer cover is far away from or close to the annular front end cover to move, the purpose that the inner drum outer cover stretches and retracts along the axial direction of the inner drum is achieved, and the effect that the water outlet correspondingly opens or closes the water outlet arranged at the annular front end cover can be achieved.

EXAMPLE five

In this embodiment, the control method of the drum washing machine includes:

in the water inlet mode, the driving mechanism drives the inner cylinder outer cover to move towards the inner cylinder direction until the inner cylinder outer cover abuts against the annular front end cover to close the water outlet. Specifically, after the washing machine is started, before water enters, the driving mechanism drives the inner barrel outer cover to move towards the inner barrel direction, so that the water outlet in the annular front end cover is blocked through the inner barrel outer cover, and water in the inner barrel cannot be discharged from the water outlet.

In a washing mode, the driving mechanism keeps the outer cover of the inner cylinder against the annular front end cover, and the outer cover of the inner cylinder and the inner cover of the inner cylinder rotate together with the inner cylinder. In particular, water in the inner barrel can not be discharged in the washing process, so that the outer cover of the inner barrel is kept to be always abutted against the annular front end cover through the driving mechanism to block the water outlet.

In the drainage mode, the driving mechanism drives the outer cover of the inner cylinder to move away from the inner cylinder so as to open the drainage outlet for drainage. Specifically, when water is drained, the outer cover of the inner cylinder opens the water outlet, so that the water in the inner cylinder can be drained.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A drum washing machine comprising a casing and an inner drum disposed in the casing, characterized in that:

the inner cylinder comprises an annular front end cover, an inner cylinder side wall and an inner cylinder bottom which are sequentially connected, the annular front end cover forms a clothes throwing opening of the inner cylinder, and a water outlet is formed in the annular front end cover; the inner cylinder is also provided with a first positioning part;

still be provided with the door closure of switch on the shell, be provided with the back shaft on the door closure, be used for the switch the inner tube enclosing cover in outlet and be used for the switch the inner tube inner cup of mouth is put in to the clothing, the back shaft sets up on the door closure, the inner tube enclosing cover with the equal rotatable installation of inner tube inner cup is in on the back shaft, the inner tube enclosing cover can slide on the back shaft, still be provided with on the door closure and be used for the drive the actuating mechanism that the inner tube enclosing cover removed, the inner tube enclosing cover still be provided with first location portion clamps complex second location portion.

2. A drum washing machine according to claim 1, characterized in that the first positioning part is a positioning groove and the second positioning part is a positioning block; or, the first positioning part is a positioning block, and the second positioning part is a positioning groove.

3. A drum washing machine according to claim 1, characterized in that the first positioning portion is provided on the ring-shaped front end cover; or the first positioning part is arranged on the side wall of the inner cylinder close to the annular front end cover.

4. A drum washing machine according to claim 1, characterized in that the inner drum is a tapered drum with a diameter gradually narrowing from the annular front end cover to the bottom of the inner drum, and the periphery of the annular front end cover is provided with a plurality of water outlets; the inner cylinder outer cover and the outer wall of the annular front end cover are correspondingly arranged, so that when the inner cylinder outer cover extends and moves towards the inner cylinder direction, the inner cylinder outer cover and the outer wall of the annular front end cover provided with the water outlet are correspondingly attached to seal the water outlet.

5. A drum washing machine according to claim 4, characterized in that the annular front end cover is provided as an annular tapered structure with a diameter gradually increasing from the front to the rear of the drum washing machine.

6. A drum washing machine according to claim 1, characterized in that the driving mechanism is a wax motor, the wax motor is installed at the inner center of the door, the output end of the wax motor is connected with the inner and outer covers, so that the telescopic output end of the wax motor drives the inner and outer covers to move telescopically towards the annular front end cover, and the water outlet is blocked or opened by the inner and outer covers.

7. A drum washing machine according to any one of claims 1 to 6, characterized in that the center of the bottom of the inner drum is mounted on the housing through a rotating shaft, the inside of the rotating shaft is a hollow part, one end of the hollow part is communicated with the inside of the inner drum, and the other end of the hollow part is communicated with the water inlet pipe of the drum washing machine.

8. A drum washing machine as claimed in claim 7 wherein the shaft includes an inner sleeve, a middle sleeve and an outer sleeve which are sequentially sleeved from inside to outside, the inner sleeve is in communication with the water inlet pipe of the drum washing machine, the flow passage between the inner sleeve and the middle sleeve forms the air inlet of the inner drum, and the flow passage between the middle sleeve and the outer sleeve forms the air outlet of the inner drum.

9. A control method of a drum washing machine according to any one of claims 1-8, characterized by comprising: