Patent Description:
In the prior art, a drum washing machine generally includes an inner drum and an outer drum which are sleeved mutually, wherein the outer drum is sealed to accommodate water, and the inner drum is configured to accommodate clothes and beat and wash clothes via rotation of the inner drum. Meanwhile, the inner drum is provided with water dehydrating holes, such that water in the outer drum flows into the inner drum through the water dehydrating holes to soak clothes in the inner drum, water in the inner drum flows to the outer drum through the water dehydrating holes, and moisture on the clothes in the inner drum is discharged out to the outer drum through the water dehydrating holes when the inner drum rotates at a high speed, to realize the purpose of washing clothes.

However, since the inner drum and the outer drum are sleeved mutually, in the using process of the washing machine, dirt easily accumulates between the inner drum and the outer drum. Meanwhile, since the inner drum and the outer drum are sleeved mutually, users cannot clean an outer wall of the inner drum and an inner wall of the outer drum, such that bacteria inside the washing machine increase, thereby lowering washing efficiency of the washing machine and lowering cleanliness of clothes after washing.

Meanwhile, in the above existing washing machine, since an outer side of the inner drum is sleeved with the outer drum, as to the washing process of the washing machine, clothes are beaten and washed via rotation of the inner drum, such that the washing capacity of the washing machine is based on the inner drum, an internal space of the washing machine is low in using efficiency, and the washing capacity of the washing machine cannot be expanded on the existing basis.

In view of this, it has become a research hotspot of how to set a washing machine to integrate the inner drum with the outer drum or directly set a closed inner drum, such that the inner drum is set to be a closed container, then the inner drum can accommodate water and clothes and can also rotate to beat clothes for washing, and also the problem that the space between the inner drum and the outer drum needs to be cleaned since washing water flows between the inner drum and the outer drum is further avoided. Meanwhile, since no outer drum is arranged in the washing machine, or the outer drum is integrated with the housing of the washing machine, the inner drum of the washing machine can be further enlarged, to expand the washing capacity of the washing machine.

However, since the inner drum can be not only configured to accommodate washing water, but also can rotate to beat and clean clothes in the drum, therefore, how to set a water dehydrating structure and a water drainage structure applicable to the above washing machine has become a problem to be urgently solved.

A washing machine comprising the features of the preamble portion of claim <NUM> is known from <CIT>.

Further washing machines having a drum without perforations on the drum are known from post-published <CIT> and further from <CIT>.

The objective of the present invention is to provide alternatives for draining an unperforated drum of a washing machine.

According to the present invention, this technical problem is solved by a washing machine according to claim <NUM>.

Compared with the washing machine in the prior art, the washing machine of the present disclosure has the following beneficial effects.

The inner drum cover is provided at the drum opening, so as to make the inner drum be formed the sealed container that can perform washing after the drum opening is correspondingly closed by the inner drum cover, so that clothes only come to contact with washing water in a sealed drum in a washing process. In this way, a case in which the clothes are contaminated because the washing water between the inner drum and the outer drum flows into the inner drum is avoided, washing cleanliness of the washing machine is greatly improved, and incomplete washing of the clothes caused by contamination of the washing water between the inner drum and the outer drum is avoided.

At the same time, the inner drum cover is relatively independently arranged, so that the user only needs to open or close the inner drum cover, and the purpose of sealing and closing the drum opening can be realized.

In addition, the outer periphery of the inner drum cover and the drum opening are correspondingly sealed and contacted, to achieve an objective of sealing and fastening the outer periphery of the inner drum cover and the drum opening, and further achieve an effect that the inner drum cover is used to effectively seal the drum opening through which the clothes are put into the inner drum.

At the same time, the washing machine of the present disclosure has a simple structure and significant effects, and is suitable for popularization and use.

In order to make the design concept of the technical solution of the present disclosure clearer and facilitate further understanding of the beneficial effects brought about by the technical solution, some specific implementations of the present disclosure are described in detail below with reference to the accompanying drawings.

The accompanying drawings are used as a part of the present disclosure to further explain the present disclosure. The illustrative embodiments and descriptions of the present disclosure are used to explain the present disclosure, but do not constitute an improper limitation on the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments. For those skilled in the art, other drawings can be obtained according to these drawings without paying creative work. In the drawings:.

Reference signs in the drawings: <NUM>-housing, <NUM>-inner drum support, <NUM>-door cover, <NUM>-drive motor, <NUM>-damping hanging spring, <NUM>-damping support rod, <NUM>-inner drum cover, <NUM>-water inlet pipe, <NUM>-drain opening, <NUM>-drain valve, <NUM>-valve plug, <NUM>-limiting spring, <NUM>-rotating wheel, <NUM>-connecting rod, <NUM>-limiting hole, <NUM>-water collection tank, <NUM>-drain hose, <NUM>-drain valve, <NUM>-locking pin, <NUM>-locking groove, <NUM>-flange, <NUM>-first flange, <NUM>-second flange, <NUM>-spray water inlet structure, <NUM>-drum opening, <NUM>-bottom of the inner drum, <NUM>-bending portion, <NUM>-first bending portion, <NUM>-second bending portion, <NUM>-inner drum, <NUM>-lifting rib, <NUM>-mounting cavity, <NUM>-drain opening, <NUM>-valve plug column, <NUM>-mounting sleeve, <NUM>-counterweight, <NUM>-connecting rib, <NUM>-support plate, <NUM>-support rib, <NUM>-notch, <NUM>-water penetration hole, <NUM>-slot, <NUM>-second extending rib, <NUM>-first mounting rib, <NUM>-second mounting rib, <NUM>-bolt, <NUM>-positioning pin, <NUM>-bolt hole, <NUM>-fixing rib, <NUM>-claw, <NUM>-limiting rib, <NUM>-through hole, <NUM>-valve plug, <NUM>-jack, <NUM>-positioning groove, <NUM>-folding edge, <NUM>-inner peripheral folding edge, <NUM>-mounting rib, <NUM>-extending rib, <NUM>-hinge hole, <NUM>-reset spring, <NUM>-long-strip-shaped through hole, <NUM>-lifting rib body.

It should be noted that these drawings and text descriptions are not intended to limit the scope of the conception the present disclosure in any way, but to explain the concept of the present disclosure for those skilled in the art by referring to specific embodiments.

In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments are described clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure. The following embodiments are used to illustrate the present disclosure, but not used to limit the scope of the present disclosure.

In the description of the present disclosure, it should be noted that orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., are orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and it is not indicated or implied that the indicated device or element has a specific orientation or is structured or operated in a specific orientation, and therefore this cannot be understood as a limitation of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "install", "connected" and "connection" should be understood in a broad sense unless otherwise clearly specified and limited, for example, may be a fixed connection, or may be a detachable connection, or may be an integrated connection; may be a mechanical connection, or may be an electrical connection; may be a direct connection or an indirect connection by using an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood in specific situations.

As shown in <FIG>, embodiments of the present disclosure introduce a washing machine. The washing machine includes a housing <NUM>, an inner drum <NUM> is arranged in the housing <NUM>, and an axis of the inner drum <NUM> extends horizontally or gradually inclines downward from front to rear. A front end of the inner drum <NUM> is provided with a drum opening <NUM> that is arranged in an open manner, and a rear end of the inner drum <NUM> is provided with a bottom of the inner drum <NUM> that is arranged in a sealed manner. There is no through hole in a drum wall of the inner drum <NUM>, so that the inner drum <NUM> forms a sealed container with which only an opening is formed in the front end. At the same time, a door cover <NUM> that can be opened outward is installed at a front end of the housing <NUM> of the washing machine, to seal the drum opening <NUM> after the door cover <NUM> is closed, and to put clothes into the inner drum <NUM> through the drum opening <NUM> after the door cover <NUM> is opened. The rear end of the inner drum <NUM> is installed in the housing <NUM> of the washing machine via an inner drum support <NUM>. The inner drum support <NUM> is coaxially arranged with the rear end of the inner drum <NUM>. An upper end and a lower end of the inner drum support <NUM> are respectively bent toward a direction of the drum opening on the front end of the inner drum <NUM>. Bending portions, which are formed by the upper end and the lower end of the inner drum support being bent toward he drum opening respectively, extend at least to a middle of the inner drum <NUM>. An upper bending portion and a lower bending portion are respectively connected to the housing <NUM> of the washing machine via a damping hanging spring <NUM> and a damping support rod <NUM> to achieve an objective that the inner drum support <NUM> can be installed in the housing <NUM> of the washing machine in a vibrating manner. At the same time, a center of the bottom of the inner drum <NUM> is coaxially arranged with a motor shaft of a drive motor <NUM> of the washing machine, to drive the inner drum <NUM> to rotate, and the inner drum <NUM> and the drive motor <NUM> are both fixedly installed on the inner drum support <NUM>. Preferably, the bottom of the inner drum <NUM> and the drive motor <NUM> are respectively arranged on two sides of the inner drum support <NUM>, the drive motor <NUM> is fixedly connected to the inner drum support <NUM>, the motor shaft of the drive motor <NUM> passes through the inner drum support <NUM> via a bearing and is coaxially fixedly connected to the bottom of the inner drum <NUM>, and the motor shaft of the drive motor <NUM> can rotate relative to the inner drum support <NUM>, to achieve an objective that the inner drum <NUM> and the drive motor <NUM> are mounted on the inner drum support <NUM>, and the inner drum <NUM> can rotate independently under an action of the drive motor <NUM> to wash clothes in the inner drum.

In addition, the washing machine in the embodiments of the present disclosure can be any washing machine in the prior art that an inner drum forms a sealed container after a door cover closes an drum opening. When the washing machine executes a dehydration process, the inner drum is controlled to rotate at a high speed, and the water flow separated from the clothes in the inner drum is smoothly drained from the inner drum, so as to achieve an objective of normally executing the dehydration process for a holeless drum washing machine. Therefore, the washing machine in the embodiments of the present disclosure is not limited to the structure in the drawings. For example, an existing ordinary washing machine may further be used provided that the inner drum <NUM> of the washing machine is arranged without dehydration holes, and a sealed container is formed after the door cover <NUM> closes the drum opening <NUM>. At the same time, the washing machine in the embodiments of the present disclosure can further be applicable to a top-opening washing machine. A clothes delivery opening is formed in the side wall of the inner drum, and a door body that can be turned outwards to be opened and closed so as to correspondingly seal and unseal the clothes delivery opening can be arranged on the side wall of the inner drum. After the inner drum stops rotating, the inner drum is positioned at a corresponding position, so that a user can correspondingly open the door body, and put the clothes into or take the clothes out of the inner drum of the washing machine through the clothes delivery opening.

At the same time, the inner drum is disposed as the sealed container for washing after the door cover is closed, so that the clothes only come into contact with the washing water in the sealed inner drum during washing. In this way, a case in which the clothes are contaminated because the washing water between the drum and the outer drum flows into the inner drum is prevented, washing cleanliness of the washing machine is greatly improved, and incomplete washing of the clothes caused by contamination of the washing water between the inner drum and the outer drum is avoided.

As shown in <FIG> and <FIG>, in order to seal the drum opening <NUM> of the washing machine, prevent washing water from flowing out through the drum opening, and implement that the inner drum <NUM> is sealed to hold water for normal washing during a working process of the washing machine. Settings are made as follows.

The drum opening <NUM> of the washing machine is provided with an inner drum cover <NUM> that can seal and unseal the drum opening, to make the inner drum form the sealed container after the inner drum cover <NUM> is correspondingly fastened to the drum opening <NUM>.

The drum opening is provided with the inner drum cover, to make the inner drum form the sealed container that can perform washing after the inner drum cover is correspondingly fastened to the drum opening, so that clothes only come to contact with washing water in the sealed inner drum in the washing process. In this way, a case in which the clothes are contaminated because the washing water between the inner drum and the outer drum flows into the inner drum is avoided, washing cleanliness of the washing machine is greatly improved, and incomplete washing of the clothes caused by contamination of the washing water between the inner drum and the outer drum is avoided.

In addition, an outer periphery of the inner drum cover and the drum opening are correspondingly fitted and sealed, to achieve an objective of sealed fastening of the outer periphery of the inner drum cover and the drum opening, so as to further achieve an effect that the inner drum cover is used to effectively seal the drum opening through which the clothes are put into the inner drum.

The inner drum cover <NUM> is independently arranged, and the outer periphery of the inner drum cover <NUM> and the drum opening <NUM> are sealed and fitted to seal the drum opening <NUM>. The inner drum cover is relatively independently arranged, so that the drum opening can be sealed and fastened when the user only needs to close the inner drum cover.

A bending portion <NUM> which is horizontally bent is arranged at a periphery of the drum opening <NUM>, and an inner peripheral surface of the bending portion <NUM> is correspondingly sealed and contacted with an outer peripheral surface of the inner drum cover <NUM>. Preferably, the bending portion <NUM> extends in a direction away from the bottom of the inner drum <NUM>, and an extending end of the bending portion <NUM> is arranged on a front end side of the drum opening <NUM>. A circle of horizontally bent bending portion is arranged at the drum opening, and the outer periphery surface of the inner drum cover is correspondingly in fitted and sealed contact with the inner peripheral surface of the bending portion, so as to change from a line-to-line sealed contact to a line-to-surface sealed contact between the inner drum cover and the drum opening. In this way, a sealed contact area is increased, and sealing performance is improved.

The bending portion <NUM> is of an inclined conical structure with increasing radial width along an extending direction. Preferably, the bending portion <NUM> includes a first bending portion <NUM> and a second bending portion <NUM> that are sequentially connected in the extending direction. The first bending portion <NUM> is of a tube structure horizontally extending, and the second bending portion <NUM> is of a conical structure that a small end is correspondingly connected to the first bending portion <NUM>, and a large end forms the extending end of the bending portion <NUM>.

The bending portion is proposed to be the first bending portion and the second bending portion that are connected, so that the inner drum cover is guided to slide into the first bending portion under an action of the conical second bending portion, and is correspondingly in sealed and fitted with the inner periphery of the drum opening via the tube-shaped first bending portion. In this way, not only is the sealing assembly of the inner drum cover and the drum opening ensured, but also quick fastening and positioning of the inner drum cover are realized.

The inner drum cover <NUM> is provided with a flange <NUM> that is bent towards a front side of the inner drum, and an outer side wall of the flange <NUM> is correspondingly sealed and contacted with an inner side wall of the bending portion <NUM> of the drum opening <NUM>. A circle of flange which is correspondingly matched with the bending portion arranged at the drum opening is arranged on the outer periphery of the inner drum cover, so that the outer periphery of the inner drum cover is correspondingly sealed and contacted with the inner peripheral surface of the bending portion. In this way, sealed contact between the inner drum cover and the drum opening becomes surface-to-surface sealed contact, a sealed contact area is increased, and sealing performance of the drum opening is significantly improved.

Preferably, the flange <NUM> includes a first flange <NUM> and a second flange <NUM>. The first flange <NUM> is correspondingly sealed and contacted with the first bending portion <NUM>, and the second flange <NUM> is correspondingly sealed and contacted with the second bending portion <NUM>. Further preferably, a length of the flange <NUM> is greater than a length of the bending portion <NUM>.

At least one sealing ring is arranged at the position at which the inner drum cover <NUM> is sealed and contacted with the drum opening <NUM>. Two sides of the sealing ring are sealed and contacted with the inner drum cover <NUM> and the drum opening <NUM> respectively. Preferably, the sealing ring is made of a material that can produce elastic deformation. At least one sealing ring is additionally arranged at the position at which the inner drum cover is sealed and contacted with the drum opening, to improve sealing performance at the drum opening, thus effectively avoiding the outflow of washing water in the inner drum.

In order to feed water into the inner drum of the washing machine and implement normal washing by sealing the inner drum to hold water during a working process of the washing machine. Settings are made as follows.

<FIG> and <FIG> introduce a water inlet structure of the washing machine. The housing <NUM> of the washing machine is provided with an inner drum <NUM>, and a rear part of the inner drum <NUM> is the bottom of the inner drum <NUM>, and the center of the bottom of the inner drum <NUM> is connected to the inner drum support <NUM> by using a rotating shaft extending axially backward. The center of the bottom of the inner drum <NUM> communicates to one end of a water inlet pipe <NUM>. The water inlet pipe <NUM> passes through the rotating shaft and extends upward to communicate with a water inlet box of the washing machine. The water inlet pipe <NUM> is provided with a water inlet valve and/or a water inlet pump for controlling the opening and closing of water flow, so as to achieve an objective of feeding water from the rear part of the inner drum of the washing machine into the inner drum.

At the same time, a heating device can be arranged on the water inlet pipe <NUM> to heat water flowing into the inner drum through the water inlet pipe <NUM>, to control a water temperature of washing water in the inner drum, so as to further achieve an objective of performing washing by using washing water at a suitable temperature in the inner drum of the washing machine.

By the above settings, water enters the inner drum through the center of the bottom of the inner drum of the washing machine, and the drum opening is sealed by using the inner drum cover, so that the water enters the inner drum through a center of the inner drum and the water is sealed in the inner drum, the inner drum can normally rotate after the water enters into the inner drum, and the water inlet pipe cannot move with the rotation of the inner drum. In this way, the inner drum is sealed during the rotation of the inner drum, and the drain valve is opened during draining to normally drain the water held in the inner drum, and an objective of normal water introduction of the washing machine with dual functions of drum rotation and water holding is achieved. At the same time, an outer drum does not need to be arranged outside the inner drum, so that a volume of the inner drum is increased, and a washing capacity of the washing machine is improved.

In order to improve a stability of water feeding, settings can be made as follows: the bottom of the inner drum <NUM> is provided with a spray water inlet structure <NUM> that guides water into the inner drum <NUM> in a divergence manner, so that the washing water that flows into the inner drum <NUM> through the water inlet pipe <NUM> forms divergent spray water under an action of the spray water inlet structure <NUM>. The spray water is sprayed into the inner drum <NUM> to increase a coverage area and uniformity of inlet water, thereby improving wetting efficiency of clothes.

In order to drain water from the inner drum of the washing machine and to seal the inner drum to hold water for normal washing during a working process of the washing machine, settings are made as follows.

<FIG> show a drainage structure of the washing machine. The inner drum <NUM> is installed in the housing <NUM> of the washing machine; a drain opening <NUM> is formed in the inner drum <NUM>. A drain valve <NUM>, in a normally off state, is installed at the drain opening <NUM>. The washing machine is provided with a positioning and locking mechanism that fixes the inner drum <NUM> when the inner drum <NUM> rotates to the fixed drainage position. The washing machine is provided with a valve plug opening mechanism for opening the drain valve <NUM> after the inner drum <NUM> is rotated to the fixed drainage position. In this way, when the washing machine is in a draining state, and after the inner drum <NUM> is rotated to the fixed drainage position, the drain valve <NUM> is opened to drain washing water in the inner drum.

When the washing machine is in normal washing process, the drain valve is switched off, the drain opening is in a closed state, and water in the inner drum does not flow out through the drain opening. When the washing machine is in the draining state, the inner drum of the washing machine is rotated to the fixed drainage position under an action of the positioning and locking mechanism, the valve plug opening mechanism on the washing machine is started, which pushes the valve plug of the drain valve to open, the drain opening is in an open state, and the water in the inner drum flows out through the drain opening.

By the above settings, the drain valve is switched off when the washing machine is in a normal washing state, and when the washing machine drains water, the drain valve is opened by a joint action of the positioning and locking mechanism and the valve plug opening mechanism, so that the water held in the inner drum does not flows out through the drain opening when the inner drum rotates normally. In this way, the inner drum is sealed during the rotation of the inner drum, and the drain valve is opened during draining to normally drain the water held in the inner drum. An objective of normal water draining of the washing machine with dual functions of drum rotation and water holding is achieved. At the same time, an outer drum does not need to be arranged outside the inner drum, so that a volume of the inner drum is increased, and a washing capacity of the washing machine is improved.

As shown in <FIG>, the embodiment introduces the drainage structure of the washing machine. The inner drum <NUM> is installed in the housing <NUM> of the washing machine. The inner drum <NUM> is provided with the drain opening <NUM>. The drain valve <NUM> in a normally closed state is installed at the drain opening <NUM>. The washing machine is provided with the positioning and locking mechanism that fixes the inner drum <NUM> when the inner drum <NUM> rotates to the fixed drainage position. The washing machine is provided with the valve plug opening mechanism for opening the drain valve <NUM> after the inner drum <NUM> is rotated to the fixed drainage position. In this way, when the washing machine is in the draining state, and after the inner drum <NUM> is rotated to the fixed drainage position, the drain valve <NUM> is opened to drain the washing water in the inner drum <NUM>.

The drain opening <NUM> is formed on an outer side wall or an outer periphery of the front end or the rear end of the inner drum <NUM>. Preferably, the inner drum <NUM> is set to be a conical cylinder with a small diameter at one end and a large diameter at the other end. The drain opening <NUM> is formed in an outer periphery of a large end, with the large diameter, of the inner drum <NUM>. The drain opening is formed in the large end of the conical inner drum, so that the water in the inner drum can converge and flow towards the drain opening. In this way, all the water in the inner drum can be drained through the drain opening.

The rear end of the inner drum <NUM> is formed by the bottom of the inner drum <NUM>, and the front end of the inner drum <NUM> is formed by the drum opening <NUM>. And the bottom of the inner drum <NUM> and the drum opening <NUM> are connected by a drum side wall. The drum side wall is a conical surface with a diameter increasing in a direction from the drum opening <NUM> to the bottom of the inner drum <NUM>. The outer periphery of the bottom of the inner drum <NUM> is provided with the drain opening <NUM> that is formed in a horizontally penetrating manner. The drain opening <NUM> is provided with the drain valve <NUM>. The drain valve <NUM> includes a valve plug <NUM> covering the drain opening <NUM>. And the valve plug <NUM> is connected to the bottom of the inner drum <NUM> via a limiting spring <NUM>, so that the valve plug <NUM> blocks the drain opening <NUM> from inside to outside under an action of the limiting spring <NUM>. The valve plug is connected to the bottom of the inner drum via the limiting spring, the limiting spring provides an elastic pulling force for the valve plug in an outer direction of the inner drum, and the valve plug is correspondingly closely fitted with the bottom of the inner drum under an action of the elastic force, so that the valve plug blocks the drain opening to seal the drain opening.

The drain opening <NUM> on the inner drum <NUM> is set to be a tapered hole gradually widened from an inside to an outside of the inner drum <NUM>. An end with small diameter of the tapered hole is sealed, and a side wall of the tapered hole is provided with a through hole to communicate the inside and the outside of the inner drum <NUM>. The valve plug <NUM> is of a plate structure covering an end with a large diameter of the tapered hole. The limiting spring <NUM> extending along an axis is arranged in the tapered hole. One end of the limiting spring <NUM> is connected to a sealing part of the end with small diameter of the tapered hole, and the other end of the limiting spring <NUM> is connected to the valve plug <NUM>. The limiting spring <NUM> is in a tensioned state to apply a thrust to the valve plug <NUM> toward the outside of the inner drum <NUM>, so that the valve plug <NUM> blocks the drain opening <NUM>.

The inner drum support <NUM> is provided at the rear end of the inner drum <NUM>, and the inner drum support <NUM> is installed in the housing <NUM> of the washing machine via a damping hanging spring <NUM> and/or a damping support rod <NUM>. The valve plug opening mechanism is installed on the inner drum support <NUM>.

When the inner drum <NUM> is at the fixed drainage position, the drain opening <NUM> is at the lowest position of the inner drum <NUM>, and the water in the inner drum <NUM> converges and flows to the drain opening <NUM>, and flows out through the drain opening <NUM> opened by the drain valve <NUM>. The valve plug opening mechanism is installed on a side, away from the inner drum <NUM> and opposite to the outer periphery of the inner drum <NUM>, of the inner drum support <NUM>. When the inner drum <NUM> is at the fixed drainage position, the drain opening <NUM> and a connecting rod <NUM> of the valve plug opening mechanism are correspondingly coaxially arranged. In this way, the connecting rod <NUM> produces axial expansion under an action of a stepping motor and a rotating wheel <NUM>, and the valve plug <NUM> of the drain valve <NUM> is driven to move to the inside of the inner drum <NUM> to open the drain opening <NUM>.

As shown in <FIG>, the valve plug opening mechanism includes the stepping motor mounted on the inner drum support <NUM>, an output end of the stepping motor is provided with the rotating wheel <NUM> fixed and connected coaxially. An outer periphery of the rotating wheel <NUM> is hinged with one end of the connecting rod <NUM>, and the other end of the connecting rod <NUM> passes through a limiting hole formed in the inner drum support <NUM> to move telescopically towards the drain valve <NUM>, so as to drive the valve plug <NUM> to move towards the inside of the inner drum <NUM> to switch on the drain valve <NUM> to drain water.

A water collection tank <NUM> is correspondingly formed outside the drain opening <NUM> of the inner drum <NUM>, and a bottom of the water collection tank <NUM> is connected to a drain hose <NUM> of the washing machine, to collect water drained through the drain opening <NUM> of the inner drum <NUM> and then drain the water out. A drain valve <NUM> is arranged at the drain hose to correspondingly control the opening and closing of the drain hose.

The drain opening <NUM> is formed on the outer periphery of the bottom of the inner drum <NUM>. When the inner drum <NUM> is at the fixed drainage position, the drain opening <NUM> is rotated to be directly below the axis of the inner drum <NUM>. The water collection tank <NUM> includes a groove correspondingly formed below the drain opening <NUM>, and a rear side wall of the groove vertically extends upward to the rear side of the drain opening <NUM> and is spaced from the drain opening <NUM> by a certain distance, to guide the water flowing through the drain opening <NUM> to fall into the water collection tank <NUM>, so as to prevent drained water flowing backwards from the horizontally arranged drain opening from splashing to the outside of the washing machine. At the same time, a front side wall of the water collection tank <NUM> is fitted to a lower part of the inner drum <NUM> of the washing machine, or a gap between the water collection tank and the drum is extremely small, to ensure that water in the water collection tank <NUM> does not splash out from a front end of the water collection tank <NUM>, thereby avoiding the drained water overflow of the inner drum.

The water collection tank <NUM> is formed on the inner drum support <NUM> of the washing machine or is integrally formed with the inner drum support <NUM>, and the valve plug opening mechanism is installed on the water collection tank <NUM>.

The positioning and locking mechanism can be any existing mechanism that can control the inner drum of the washing machine to rotate to the fixed drainage position and fix the inner drum. For example, a drive motor <NUM> that drives the inner drum to rotate is provided with a corresponding control program to control the inner drum to rotate to the fixed drainage position and lock the inner drum, so that the inner drum no longer rotates. The positioning and locking mechanism can further be set as follows: a locking groove recessed inward is formed in the side wall of the inner drum <NUM>, and a locking pin corresponding to the locking groove is installed on the washing machine; the locking pin can be telescopically mounted on the housing <NUM> of the washing machine or the inner drum support <NUM> along the radial direction of the inner drum; when the locking pin retracts inward under an action of a driving device, the locking pin is separated from the locking groove, and the inner drum <NUM> rotates freely; and when the locking pin pops out under the action of the driving device, the locking pin extends into the locking groove in the inner drum <NUM>, the inner drum <NUM> no longer rotates, and the inner drum <NUM> is at the fixed drainage position, so that the drain opening <NUM> is at a position corresponding to the valve plug opening mechanism.

As shown in <FIG>, during a normal washing process of the washing machine, the drain valve is switched off, the inner drum rotates normally, and the water held in the inner drum does not flow out through the drain opening, and clothes are washed normally. As shown in <FIG>, during the draining process of the washing machine, the inner drum is rotated to the fixed drainage position, the stepping motor drives the rotating wheel to rotate, the rotating wheel drives the connecting rod to move towards the inner drum, an end of the connecting rod drives the valve plug of the drain valve at an opposite position to move to the inside of the inner drum, and the valve plug overcomes a pulling force of the spring and is pushed to open the drain opening, the water in the inner drum flows out through the opened drain opening, and after being collected by the water collection tank, outflowing water is drained to the outside of the washing machine through the drain hose. In this way, the water held in the inner drum is drained.

In an alternative arrangement the differences with regard to the above are as follows: the valve plug opening mechanism includes an electromagnet installed on the inner drum support <NUM>, and the electromagnet is arranged corresponding to the drain valve <NUM>, so that the drain valve <NUM> and the electromagnet are in a coaxial direction when the inner drum <NUM> is rotated to the fixed drainage position. The valve plug <NUM> of the drain valve <NUM> is provided with a magnet or the valve plug is entirely formed by the magnet, so that the electromagnet is energized to provide electromagnetic repulsion for the valve plug <NUM> to drive the valve plug <NUM> to move towards the inside of the inner drum <NUM> to switch on the drain valve <NUM> to drain water.

During the normal washing process of the washing machine, the drain valve is switched off, the drum rotates normally, the water held in the inner drum does not flow out through the drain opening, and the clothes are washed normally. During the draining process of the washing machine, the inner drum rotates to the fixed drainage position, the electromagnet is energized, and the electromagnet provides a repulsive force for the valve plug, so that the valve plug moves towards the inside of the inner drum by overcoming a spring force under the action of a repulsive force. Under the action of repulsive force, the valve plug overcomes an elastic force of the spring and moves towards the inside of the inner drum, to open the drain opening of the inner drum. The water in the inner drum flows out through the opened drain opening, and after being collected by the water collection tank, the outflowing water is drained to the outside of the washing machine through the drain hose. In this way, the water held in the inner drum is drained.

A cleaning-free washing machine comprises an inner drum <NUM> of the washing machine is a sealed container after a drum opening is fastened and sealed by a door cover. A side wall of the inner drum <NUM> is provided with lifting ribs <NUM>. The lifting ribs <NUM> are hollow and communicate to the inside of the inner drum <NUM>. At least one drain opening <NUM> communicated to a hollow part of the lifting rib <NUM> is formed in the side wall of the inner drum <NUM>. The drain opening <NUM> is provided with a sealing valve inside the lifting rib <NUM>. When the inner drum <NUM> rotates at a high speed, a valve plug <NUM> of the sealing valve moves along a radial center direction of the inner drum <NUM> under the action of centrifugal force to open the drain opening <NUM> formed in the side wall of the inner drum <NUM>.

Through the above arrangement, the drain opening is hidden inside the lifting rib of the drum, and water in the drum is drained out from the hidden drain opening. At the same time, a sealing valve is installed at the drain opening, so that a valve plug of the sealing valve is correspondingly controlled by using a centrifugal force when the drum rotates at a high speed to correspondingly open and close the drain opening. When the washing machine performs the dehydration and/or drainage process, after the centrifugal force under the high-speed rotation of the drum acts on the valve plug of the sealing valve, the drain opening automatically opens and the drum performs corresponding drainage.

As shown in <FIG>, this embodiment introduces a structure of a lifting rib of a drum for the above cleaning-free washing machine. The lifting rib <NUM> of the drum includes a lifting rib body <NUM> extending along structural lines of a side wall of the drum, and the body is of a shell structure whose lower side is open and that is fastened to the inner side wall of the inner drum <NUM>. The lifting rib body <NUM> is hollow inside to form a mounting cavity <NUM> for installation of a sealing valve. The lifting rib <NUM> is provided with a water passing structure through which washing water in the inner drum <NUM> is guided into the mounting cavity <NUM>.

The drum lifting rib of the drum is arranged as a hollow chamber, so that the lifting rib forms a chamber in which the sealing valve for draining water is installed. In this way, hidden assembly of the sealing valve is achieved, and the function of using the centrifugal force to drain water is implemented for the cleaning-free washing machine. At the same time, the lifting rib extends along the structural lines of the drum, so that when the drum rotates, the lifting rib blocks the washing water flowing against the wall, the blocked washing water flows into the lifting rib through the water-passing structure provided on the lifting rib to guide the water to be drained outside.

As shown in <FIG>, in the embodiment, two opposite side walls of the lower side of the lifting rib body <NUM> are respectively provided with mounting ribs vertically protruding downwards, and the lower ends of the mounting ribs are provided with installation structures fixed to the side wall of the inner drum <NUM>.

Left and right sides of the lower side of the lifting rib <NUM> are respectively provided with a first mounting rib <NUM> and a second mounting rib <NUM>, a lower end of the first mounting rib <NUM> is provided with a bolt hole <NUM> for fixed installation relative to a bolt hole formed in the side wall of the inner drum <NUM>. A lower end of the second mounting rib <NUM> is provided with a positioning pin <NUM> that is correspondingly in plug-connection to a position hole formed in the side wall of the inner drum <NUM>. Further preferably, two first mounting ribs <NUM> and two second mounting ribs <NUM> are distributed at the four end corners of the square lifting rib <NUM>, the two first mounting ribs <NUM> are arranged symmetrically with respect to the center of the lifting rib <NUM>, and the two second mounting ribs <NUM> are arranged symmetrically with respect to the center of the lifting rib <NUM>.

The four end corners of the lifting rib are provided with mounting ribs for fixing, so that the four end corners of the lifting rib are respectively fastened and installed, and the assembly of the lifting rib is more reliable. At the same time, the mounting ribs are provided with bolt holes and the positioning pins separately, and the lifting rib is pre-positioned for assembly by the positioning pins and then is fastened by the bolts, so that the assembly speed of the lifting rib is improved.

As shown in <FIG>, in the embodiment, a lower side surface of the lifting rib <NUM> is provided with fixing ribs <NUM> protruding vertically downwards on the opposite two side walls, the lower ends of the fixing ribs <NUM> are provided with claws <NUM> horizontally protruding and extending, and the claws <NUM> are correspondingly clamped and fixed to clamping holes correspondingly formed in the side wall of the inner drum <NUM>. Preferably, the fixing ribs <NUM> are arranged close to the center of the corresponding sides of the lifting rib <NUM>. Further preferably, the claws <NUM> protrude and extend from the corresponding sides of the lifting rib <NUM> toward the center square of the lifting rib <NUM>.

The lifting rib body <NUM> has a conical shape that gradually protrudes upward from the left and right sides to the middle.

As shown in <FIG>, the outer periphery of the lifting rib <NUM> is of a square shape with arc chamfers at the end corners, the left and right side surfaces of the lifting rib <NUM> are inclined surfaces that gradually rise from the outer periphery to the center, and the top of the lifting rib <NUM> is a smooth arc surface that has an arc chamfer and that connects the tops of the two side surfaces. The front and rear ends of the lifting rib <NUM> are inclined surfaces that gradually incline downward from the end of the smooth arc surface to the outer periphery. The side edges of the inclined surfaces are respectively in sealed connection to the corresponding ends of the side surfaces of the lifting rib <NUM> by using the arc chamfered surfaces.

An appearance surface of the lifting rib is set to be composed of a plurality of smooth curved surfaces, to reduce the degree of friction between the lifting rib and the clothes, so as to further improve washing efficiency and reduce a washing abrasion rate of the clothes.

In the embodiment, the outer periphery of the lifting rib body <NUM> is correspondingly in fitted contact with the side wall of the inner drum <NUM>, and there is at least one notch <NUM> in the outer periphery, so that the washing water in the inner drum <NUM> flows into the mounting cavity <NUM> from the notch <NUM>. Preferably, the left and right sides of the square lifting rib <NUM> are respectively provided with multiple notches <NUM> formed at intervals. Further preferably, the notches <NUM> are respectively formed near the two ends on the left and right sides, the first mounting rib <NUM> and the second mounting rib <NUM> are respectively arranged in a corresponding section with the notches <NUM> at the corresponding end corners, and the fixing ribs <NUM> and the notches are arranged in a staggered manner.

The multiple staggered notches are arranged at the bottom of the lifting rib. On the premise of providing a stable assembly for the lifting rib, after the washing water flowing against the drum wall is blocked by the lifting ribs, the washing water flows into the lifting rib through the notches, so that the washing water all drains out through the notches in the bottom of the lifting rib by using the centrifugal force under the high-speed rotation of the drum.

The lower side of the mounting cavity <NUM> enclosed by the lifting ribs <NUM> is constituted by the side wall of the inner drum <NUM>. The corresponding area of the side wall of the inner drum <NUM> is provided with the drain openings <NUM> communicating with the inside of the mounting cavity <NUM>, and the drain openings <NUM> are provided with the sealing valves whose switching on and off are controlled by using the centrifugal force. Preferably, the drain openings <NUM> are formed in the axis of the lifting rib <NUM>.

The lower side of the lifting rib <NUM> is provided with two limiting ribs <NUM> extending vertically downward and located in the mounting cavity. The two limiting ribs <NUM> are separated by a certain gap, and the counterweights of the sealing valves move in the gap, so that the gap provides a limiting effect for the movement of the sealing valves. Preferably, the two limiting ribs <NUM> are arranged symmetrically relative to the axis of the lifting rib <NUM>.

As shown in <FIG>, a plurality of water penetration holes <NUM> are formed in the lifting rib body <NUM>, and each water penetration hole <NUM> communicates the mounting cavity <NUM> with the drum outside the lifting rib body <NUM>, to guide the washing water in the inner drum <NUM> to flow into the lifting rib, so as to further increase the rate at which the washing water in the drum flows into the lifting rib. Preferably, the rear end of the lifting rib <NUM> is arranged close to the bottom of the inner drum, and there is a certain gap between the rear bottom of the lifting rib <NUM> and the side wall of the inner drum <NUM>, to guide the washing water in the mounting cavity <NUM> to flow backwards into the bottom of the inner drum of the inner drum <NUM>.

<FIG> introduce a sealing valve installation structure for the above cleaning-free washing machine. The sealing valve installation structure includes a support plate <NUM> mounted on the inner side wall of an inner drum <NUM>. A through hole <NUM> corresponding to drain openings <NUM> formed in the side wall of the inner drum <NUM> is provided in the middle of the support plate <NUM>, and a certain gap between the support plate <NUM> and the side wall of the inner drum <NUM> is provided to form a space for valve plugs of sealing valves to move up and down. Sleeve-shaped mounting sleeves <NUM> are fixedly installed on the upper side of the support plate <NUM>. Inner through holes of the mounting sleeve <NUM> and the through hole <NUM> formed in the support plate <NUM> are coaxially and oppositely arranged, so that the valve plugs of the sealing valves are coaxially installed in the inner through hole and can move up and down.

The above installation structure is arranged on the drum, the valve plugs of the sealing valves arranged at the drain openings can be correspondingly assembled in the gap between the support plate and the drum, so that the valve plugs have an upper and lower movement margin in the gap, and it is ensured that the valve plugs correspondingly block or open the drain openings. At the same time, valve plug columns are correspondingly assembled in the mounting sleeves to be limited in the movement direction by the mounting sleeves, thereby avoiding tilting of the valve plug columns. In addition, the mounting sleeves are arranged on the support plate, and supporting points of counterweights of the sealing valves can be correspondingly mounted at the outer peripheries of the mounting sleeves. In this way, prying rotation and installation fixation of the counterweights are ensured.

The sealing valve installation structure is arranged inside the lifting ribs described in Embodiment <NUM> above. One or more sealing valves can be installed in the mounting cavity inside the lifting rib, and each sealing valve includes one sealing valve installation structure.

As shown in <FIG>, in the embodiment, at least one lifting rib <NUM> is installed on the side wall of the inner drum <NUM> of the washing machine, and a lifting rib body <NUM> is of a shell structure whose lower side is open and that is fastened to the inner side wall of the inner drum <NUM>. The rib lifting body <NUM> is hollow inside to form a mounting cavity <NUM> for installation of the sealing valve, and the sealing valve installation structure is arranged in the mounting cavity <NUM>.

As shown in <FIG>, in the embodiment, the support plate <NUM> is a plate that is laid flat on the inner wall of the drum, the lower side of the support plate <NUM> is provided with multiple support ribs <NUM> protruding and extending downward, and the lower ends of the supporting ribs <NUM> are in limit contact with the inner side wall of the inner drum <NUM>. Preferably, the outer periphery of the supporting plate <NUM> is provided with multiple supporting ribs <NUM> arranged at intervals. Further preferably, the left and right sides of the supporting plate <NUM> are provided with multiple supporting ribs <NUM> arranged at interval and the front and rear sides of the supporting plate <NUM> are respectively provided with a whole supporting rib <NUM> extending along the corresponding side.

The left and right sides of the lifting rib <NUM> are respectively provided with notches <NUM>, and the notches <NUM> are formed corresponding to the sides of the support plate <NUM>, so that the sides of the support plate <NUM> are clamped in the notches <NUM> on the corresponding sides.

The support plate <NUM> is provided with a downwardly recessed positioning groove <NUM> and a jack <NUM> that is arranged in a penetration manner. The jack <NUM> vertically penetrates through a panel of the support plate, and the lower side of the lifting rib <NUM> is provided with a first mounting rib <NUM> that protrudes and extends downward and that is coaxially arranged with the jack <NUM>. The lower end of the first mounting rib <NUM> is provided with a bolt hole <NUM> coaxially opposite to the jack. A bolt <NUM> sequentially passes through the drum wall and the support plate <NUM> from the outer wall of the drum upwards, and then is correspondingly screwed and fixed to the bolt hole <NUM> formed in the first mounting rib <NUM>, so that the support plate <NUM> and the lifting rib <NUM> are fixedly installed with the inner drum <NUM>. The positioning groove <NUM> is formed in the upper side surface of the support plate <NUM>, the lower side of the lifting rib <NUM> is provided with a second mounting rib <NUM> protruding and extending downward and coaxially arranged corresponding to the positioning groove <NUM>, and the lower end of the second mounting rib <NUM> is provided with a positioning pin <NUM> that is correspondingly in plug-connection to the positioning groove <NUM>.

The mounting sleeves <NUM> are of a vertically extending tube structure. The lower ends of the mounting sleeves <NUM> are open, the upper ends of the mounting sleeves <NUM> are provided with folding edges <NUM> protruding horizontally inward, and the inner peripheries of the folding edge <NUM> are provided with inner peripheral folding edges <NUM> vertically extending downward to the lower ends of the mounting sleeves <NUM>. The outer walls of the inner peripheral folding edges <NUM> and the inner walls of the folding edges <NUM> are separated by certain gaps, to form chambers for reset springs of the sealing valves to be installed and fixed. Preferably, the lower ends of the mounting sleeves <NUM> are placed on the upper side of the support plate <NUM>, the mounting sleeves <NUM> are coaxially arranged with the through hole <NUM> formed in the support plate <NUM>, the inner peripheral diameters of the lower ends of the mounting sleeves <NUM> are less than or equal to the diameter of the through hole <NUM>, and the outer peripheral diameters of the lower ends of the mounting sleeves are greater than the diameter of the through hole <NUM>.

The upper side of the support plate <NUM> is provided with mounting ribs <NUM> protruding and extending upward, and the upper ends of the sealing sleeves <NUM> are provided with extending ribs <NUM> horizontally protruding and extending outward. The extending ends of the extending ribs <NUM> and the upper ends of the mounting ribs <NUM> are correspondingly overlapped and fitted, and overlapping parts are fixed and connected by the bolts, so that the support plate <NUM> and the mounting sleeves <NUM> are fastened to be installed by the bolts. Preferably, mounting ribs <NUM> respectively arranged on the left and right sides of the through hole <NUM> are arranged on the upper side of the support plate <NUM>, and the extending ribs <NUM> horizontally protruding and extending outward are respectively provided on the left and right sides of the mounting sleeves <NUM>, so that the two extending ribs <NUM> and the mounting ribs <NUM> on the corresponding sides respectively overlap and are fixed to be installed by the bolts.

One side of each mounting sleeve <NUM> is provided with a second extending rib <NUM> that horizontally protrudes and extends outward, and the extending end of the second extending rib <NUM> is provided with a hinge hole <NUM> having a horizontal axis, to implement hinged installation of the counterweight of each sealing valve. Preferably, an included angle between the second extending rib <NUM> and the extending direction of the extending rib <NUM> is <NUM> degrees, and the axis of the hinge hole <NUM> is parallel to the extending direction of the extending rib <NUM>. Further preferably, the extending end of the second extending rib <NUM> is higher than the top of each mounting sleeve <NUM>, and the extending end of the second extending rib <NUM> is provided with a slot <NUM>, the slot <NUM> is formed along the extending direction of the second extending rib <NUM>, to implement corresponding plug-connection to the counterweight of each sealing valve. The slot <NUM> is provided with a horizontally extending hinge hole <NUM>.

The mounting cavity <NUM> enclosed by the lifting rib <NUM> is provided with two oppositely arranged sealing valve mounting structures, and the second extending ribs <NUM> of the two sealing valve mounting structures oppositely extend in an approaching direction.

<FIG> show a sealing valve plug structure for the above cleaning-free washing machine. The sealing valve plug structure includes valve plug columns <NUM> corresponding to drain openings formed in the side wall of the inner drum <NUM>, and counterweights <NUM> are hinged to the upper end of the valve plug columns <NUM>. Sealing valve installation structure are fixedly installed on the side wall of the inner drum <NUM>, and reset springs <NUM> are clamped between the sealing valve installation structures and the valve plug columns <NUM>.

The above valve plug structures are installed on the drum, the counterweights can be used to generate an action, under the action of centrifugal force, to correspondingly open the drain opening, and the valve plug columns can further be reset by the reset springs to make the valve plugs correspondingly block the drain opening. In this way, the centrifugal force under the high-speed rotation of the drum is used to act on the valve plug columns to correspondingly open and close the drain openings.

The sealing valve plug structure in the embodiment can be installed on the sealing valve installation structure in the above Embodiment <NUM>, or valve plugs of a sealing valves can further be fixedly installed on the drum of the washing machine by using the above sealing valve installation structure. In particular, the sealing valve plug structure in the embodiment can further be installed in the lifting ribs described in Embodiment <NUM> by using the sealing valve installation structure described in Embodiment <NUM>. The above mounting structure extending to the hollow part of the lifting rib is arranged on the side wall of the drum, so that a support rod is installed on the top of a mounting seat at a certain height from the side wall of the drum, and there can be a certain height difference between the end of the support rod and the side wall of the drum. In this way, the counterweights move downward to provide displacement space for moving the valve plug.

As shown in <FIG>, in the embodiment, the valve plug columns <NUM> are coaxially arranged at the drain openings <NUM>, and the lower ends of the valve plug columns <NUM> is provided with valve plugs <NUM> protruding outward in the radial direction. Preferably, the valve plugs <NUM> are plugs that gradually expand a radial size outward from bottom to top. The radial width of a large end of each valve plug <NUM> is larger than the diameter of each drain opening <NUM>, and the radial width of a small end is smaller than the diameter of each drain opening <NUM>.

The sealing valve installation structure includes a support plate <NUM> installed on the inner side wall of the inner drum <NUM>, a through hole <NUM> corresponding to the drain openings <NUM> formed in the side wall of the inner drum <NUM> is formed in the middle of the support plate <NUM>, and there is a certain gap between the support plate <NUM> and the side wall of the inner drum <NUM>, to form a space for the valve plugs of the sealing valves to move up and down. The upper side of the support plate <NUM> is fixedly provided with a sleeve-shaped mounting sleeves <NUM>, and inner through holes of the mounting sleeves <NUM> and the through hole <NUM> formed in the support plate <NUM> are coaxially and oppositely arranged, so that the valve plug columns <NUM> of the sealing valves are coaxially arranged in the inner through holes and can move up and down.

The mounting sleeves <NUM> are of a vertically extending tube structure. The lower ends of the mounting sleeves <NUM> are open, the upper ends of the mounting sleeves <NUM> are provided with folding edges <NUM> protruding horizontally inward, and the inner peripheries of the folding edges <NUM> are provided with inner peripheral folding edges <NUM> vertically extending downward to the lower ends of the mounting sleeves. The outer walls of the inner peripheral folding edges <NUM> and the inner walls of the folding edges <NUM> are separated by certain gaps, to form chambers for reset springs <NUM> of the sealing valves to be installed and fixed. Preferably, the outer walls of the inner peripheral folding edges <NUM> are sleeved with the reset springs <NUM>, the upper ends of the reset springs <NUM> collide with the lower side of the folding edges <NUM>, and the lower ends of the reset springs <NUM> collide with the large end of the valve plugs <NUM>. Further preferably, the outer walls of the valve plug columns <NUM> collide with the inner walls of the inner peripheral folding edges <NUM> in a limiting manner.

One side of each mounting sleeve <NUM> is provided with a second extending rib <NUM> horizontally protruding and extending outward, and the extending end of the second extending rib <NUM> is provided with a hinge hole <NUM> having a horizontal axis. The counterweights of the sealing valves <NUM> and the second extending ribs <NUM> are mounted via a pin passing through the hinge hole <NUM>.

The upper ends of the counterweights <NUM> are provided with connecting ribs <NUM> protruding and extending upward in the axial direction. The upper ends of the valve plug columns <NUM> pass through the tops of the mounting sleeves <NUM>, and the ends of the connecting ribs <NUM> are connected to the upper ends of valve plug columns <NUM> in a hinging manner. The middle parts of the connecting ribs <NUM> and the second extending ribs <NUM> of the mounting sleeves <NUM> correspondingly overlap and are in plug-connection, and are installed in a hinging manner at the overlapping portion via a penetrated pin. Preferably, the extending ends of the second extending ribs <NUM> are higher than the tops of the mounting sleeves <NUM>, the extending ends of the second extending ribs <NUM> are provided with slots <NUM>, the slots <NUM> are arranged along the extending direction of the second extending ribs <NUM>, and the middle parts of the connecting ribs <NUM> of the sealing valve are correspondingly inserted into the slots <NUM>. The slots <NUM> are provided with the hinge holes <NUM> horizontally extending, and the middle parts of the connecting ribs <NUM> are provided with the corresponding overlapping hinge hole, so as to implement hinged installation at the overlapping portion via the penetrated pins.

The end of each connecting rib <NUM> is provided with a rotating hole hinged to the upper end of the corresponding valve plug column <NUM>. The rotating hole is a long-strip-shaped through hole <NUM> extending along the axial direction of the corresponding connecting rib <NUM>, to provide a space for the connecting rib <NUM> to drive the valve plug column <NUM> to move up and down when the counterweight <NUM> rotates around the mounting sleeve <NUM>.

The outer periphery diameters of the upper ends of the valve plugs <NUM> are greater than the diameters of the lower ends of the inner peripheral folding edges, and the heights of the valve plugs <NUM> are less than the height of the gap between the support plate and the side wall of the drum.

The mounting cavity <NUM> enclosed by the lifting ribs <NUM> is provided with two oppositely arranged sealing valves, the two sealing valves are arranged along the direction of the structural lines of the drum, and the counterweights <NUM> of the two sealing valve plug structures oppositely extend towards an approaching direction.

Claim 1:
A washing machine, comprising an inner drum (<NUM>), wherein
an axis of the inner drum (<NUM>) extends horizontally or gradually inclines downward from front to rear, and an inner drum cover (<NUM>) arranged at a drum opening (<NUM>) of the inner drum (<NUM>) of the washing machine; wherein,
the inner drum cover (<NUM>) is used to open or close the drum opening (<NUM>); and the inner drum (<NUM>) is a closed container after the drum opening (<NUM>) is closed by the inner drum cover (<NUM>);
the inner drum (<NUM>) is provided with a first drain opening (<NUM>), and a drain valve (<NUM>) is installed at the first drain opening (<NUM>);
characterized in that
the washing machine is provided with a positioning and locking mechanism for fixing the inner drum (<NUM>) when the inner drum (<NUM>) rotates to a fixed drainage position;
the washing machine is provided with a valve plug opening mechanism for opening the drain valve (<NUM>) after the inner drum (<NUM>) rotates to the fixed drainage position, so that when the washing machine drains water, and after the inner drum (<NUM>) rotates to the fixed drainage position, the drain valve (<NUM>) is configured to be opened to drain away washing water in the inner drum (<NUM>).