CN106758019B

CN106758019B - Drum washing machine, water spraying device for drum washing machine and drum assembly

Info

Publication number: CN106758019B
Application number: CN201611080331.6A
Authority: CN
Inventors: 刘鹤峰; 曲洪莲
Original assignee: Wuxi Little Swan Electric Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2016-11-29
Filing date: 2016-11-29
Publication date: 2023-07-14
Anticipated expiration: 2036-11-29
Also published as: CN106758019A

Abstract

The invention discloses a drum washing machine, a water spraying device and a drum assembly for the drum washing machine, wherein the water spraying device comprises: the box body is internally limited with a water containing cavity, and is provided with an outer mounting surface used for being connected with a roller of the roller washing machine and an inner water spraying surface opposite to the outer mounting surface, and the inner water spraying surface is provided with at least one water spraying hole communicated with the water containing cavity; at least one division plate is arranged in the water containing cavity to divide the water containing cavity into a plurality of water distributing cavities, and each water distributing cavity is connected with at least one water spraying hole. According to the water spraying device provided by the embodiment of the invention, the washing effect and efficiency can be improved, and the cost is reduced.

Description

Drum washing machine, water spraying device for drum washing machine and drum assembly

Technical Field

The present invention relates to the field of laundry treatment, and more particularly, to a water spraying device for a drum washing machine, a drum assembly having the same, and a drum washing machine having the same.

Background

The drum washing machine washes clothes by the principle that the clothes are lifted, dropped and beaten under the action of the rotation of the inner drum driven by the motor and the lifting ribs. Compared with the pulsator washing machine, the drum washing machine can save water resources, but has the defect that clothes cannot be fully infiltrated and mixed with washing water like the pulsator washing machine. In view of this, a shower type apparatus has been developed in which washing water is sprayed on laundry by a water pump so that the washing water and the laundry are sufficiently soaked and washed, a washing ratio is improved, and a washing time is saved, but an additional washing shower increases power consumption and cost.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the invention provides the water spraying device which can improve the washing effect and efficiency and reduce the cost.

The invention also provides a roller assembly with the water spraying device.

The invention also provides a drum washing machine with the drum assembly.

According to an embodiment of the first aspect of the present invention, a water shower apparatus for a drum washing machine includes: the box body is internally provided with a water containing cavity, the box body is provided with an outer mounting surface used for being connected with a roller of the roller washing machine and an inner water spraying surface opposite to the outer mounting surface, and the inner water spraying surface is provided with at least one water spraying hole communicated with the water containing cavity; at least one division plate is arranged in the water containing cavity to divide the water containing cavity into a plurality of water distributing cavities, and each water distributing cavity is connected with at least one water spraying hole.

According to the water spraying device provided by the embodiment of the invention, the washing effect and efficiency can be improved, and the cost is reduced.

In addition, the water spraying device for a drum washing machine according to the above embodiment of the present invention may have the following additional technical features:

according to some embodiments of the invention, the box is adapted to be disposed on an inner sidewall of the drum and the water-containing chamber extends along a circumferential direction of the drum, and the partition plate includes a plurality of partition plates disposed at intervals along the circumferential direction of the drum.

According to some embodiments of the invention, the water spray holes are distributed in a plurality of rows along a circumferential direction of the drum, each row including a plurality of the water spray holes arranged at intervals along an axial direction of the drum.

According to some embodiments of the invention, the outer mounting surface is provided with a water outlet hole communicated with the water containing cavity, and the water outlet hole corresponds to a water through hole on the roller.

According to some embodiments of the invention, the water outlet holes are distributed in two rows along the axial direction of the drum, the two water outlet holes are respectively arranged adjacent to two ends of the box body, and each row comprises a plurality of water outlet holes which are arranged at intervals along the circumferential direction of the drum.

According to some embodiments of the invention, the box and the water containing chamber each extend in an arc along the circumference of the drum.

According to some embodiments of the invention, the outer ends of the plurality of partition plates are connected to the outer mounting surface, and the inner ends of the plurality of partition plates are spaced apart from the inner water shower surface so as to communicate the plurality of water diversion chambers.

According to some embodiments of the invention, the plurality of partition plates comprises at least one first partition plate and at least one second partition plate, the first partition plate and the second partition plate are respectively arranged in the two half cavities of the water containing cavity, and the first partition plate and the second partition plate extend from outside to inside towards a direction away from each other.

According to some embodiments of the invention, the first and second baffles each comprise a plurality and are each formed as an arcuate plate.

According to some embodiments of the invention, the first spacers are disposed in parallel, the second spacers are disposed in parallel, and a distance between adjacent first spacers and second spacers is greater than a distance between adjacent two first spacers and a distance between adjacent two second spacers.

According to some embodiments of the invention, the outer mounting surface is provided with a clamping part adapted to be clamped with the roller.

According to some embodiments of the invention, the case is integrally formed with the divider plate.

A roller assembly according to an embodiment of the second aspect of the present invention includes: the cylinder is internally limited with a cylinder cavity, and the side wall of the cylinder is provided with a water through hole; according to the embodiment of the invention, the water spraying device for the drum washing machine is connected with the drum and is arranged in the drum cavity, and the water spraying device comprises at least one water spraying device.

According to some embodiments of the invention, the cartridge is removably coupled to the roller assembly.

A drum washing machine according to an embodiment of the third aspect of the present invention includes a drum assembly according to an embodiment of the present invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

FIG. 2 is a top view of a roller assembly according to an embodiment of the invention;

fig. 3 is an inside view of a water shower apparatus for a drum washing machine according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3;

fig. 5 is an outside view of a water shower apparatus for a drum washing machine according to an embodiment of the present invention.

Reference numerals:

a roller assembly 100;

a drum 10; a water shower device 20; lifting ribs 30;

a cylinder chamber 101; a water passage hole 102;

a case 21; a partition plate 22; a first separator 221; a second separator 222;

an outer mounting surface 210; an inner water shower surface 220;

a water containing chamber 201; a water diversion cavity 2011; a water spraying hole 202; and a water outlet 203.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are intended to be illustrative of the present invention and not to be construed as limiting the present invention, and variations, modifications, alternatives and variations of the above embodiments may be made by those of ordinary skill in the art within the scope of the invention.

The drum assembly 100 and the water spray device 20 according to the embodiment of the present invention are described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 5, a drum assembly 100 according to an embodiment of the present invention may include: a drum 10 and a shower 20. The drum 10 defines a tub 101 therein, and laundry may be placed in the tub 101 for washing. As shown in fig. 1, lifting ribs 30 may be selectively provided on the inner sidewall of the drum 10, and the lifting ribs 30 may extend in the axial direction of the drum 10 to lift laundry, thereby improving washing effect.

The water spraying device 20 is connected with the drum 10 and is arranged in the drum cavity 101, the water spraying device 20 can rotate along with the drum 10 and spray water to clothes, so that the clothes can be fully soaked by the washing water, the washing ratio is improved, and the washing time is saved. The water drenching device 20 may include at least one. That is, one shower 20 may be provided in the drum 10, or two or more shower 20 may be provided, and particularly, may be flexibly provided according to the size of the drum 10, washing requirements, and the like.

More preferably, the water spraying device 20 may be detachably connected to the drum assembly 100. That is, the water spraying device 20 can be detached from the drum 10 when not in use, and can be used as an optional accessory of the drum assembly 100, so that the use is more flexible, and the autonomous selectivity of a user is increased.

The shower 20 will be described in detail. Referring to fig. 1 to 5, the water spraying apparatus 20 may include a case 21 and a plurality of partition plates 22. The box body 21 may define a water containing cavity 201 therein, the box body 21 has an outer mounting surface 210 and an inner water spraying surface 220, the outer mounting surface 210 may be connected to the drum 10, and the outer mounting surface 210 and the inner water spraying surface 220 are disposed opposite to each other. The inner water spraying surface 220 is provided with a plurality of water spraying holes 202 communicated with the water containing cavity 201. The partition plate 22 is disposed in the water containing cavity 201 to divide the water containing cavity 201 into a plurality of water separating cavities 2011, and each water separating cavity 2011 is connected to at least one water spraying hole 202.

Therefore, when the water spraying device 20 pivots along with the drum 10, the water spraying device 20 can be completely or partially immersed in the washing water in the drum cavity 101 when moving to the low position, the washing water is sucked into the water containing cavity 201 through the water spraying holes 202 on the outer mounting surface 210 of the box body 21 and is stored in the water distributing cavities 2011 under the action of the inner partition plate 22, and when the water spraying device 20 rotates to the high position along with the drum 10, the washing water can flow out from the water spraying holes 202 and spray on the surface of the clothes under the self gravity, so that the clothes and the washing liquid are fully immersed, the washing ratio is improved, and the washing time is saved. The partition plate 22 can separate the washing water in the water containing cavity 201, so that the concentrated distribution of the washing water is avoided, the water inlet and outlet are smoother, the water spraying is more uniform, and the water spraying effect can be improved.

The drum assembly 100 having the water spraying device 20 can achieve the effect of spraying the washing water on the clothes by utilizing the rotation of the drum assembly, so that the washing water and the clothes are more fully soaked and washed, the washing ratio is improved, the washing time is saved, the washing effect and the washing efficiency are improved, the number of parts can be reduced, the power consumption is reduced, the cost and the structural complexity are effectively reduced, and the manufacturability is strong.

In addition, when the drum assembly 100 is in operation, the filth falling from the clothes can enter the water spraying device 20 together with the washing water, so that the water spraying device 20 can also play a role in collecting the washing filth, the washing performance is further improved, and a user can clean the water spraying device 20, for example, the water spraying device 20 can be detached from the drum 10 for washing.

In the present invention, the number of the partition plate 22 and the shower holes 202 is not particularly limited, and may be one, two, three, or more than three, for example, and may be flexibly selected according to the specific circumstances.

According to some embodiments of the present invention, the case 21 may be provided on an inner sidewall of the drum 10, and the water-receiving chamber 201 may extend in a circumferential direction of the drum 10. Here, the "the water containing chamber 201 extends along the circumferential direction of the drum 10" may be understood in a broad sense, that is, it may be understood that the water containing chamber 201 extends in an arc-shaped manner along the circumferential direction of the drum 10, and it may be understood that the water containing chamber 201 extends in a straight line or a zigzag manner along the circumferential direction of the drum 10. Therefore, in the process that the water spraying device 20 rotates along with the roller 10, the time of the box body 21 in the washing water of the cylinder cavity 101 is longer, the water inlet time of the water containing cavity 201 is longer, the water inlet quantity of the water containing cavity 201 is higher, the water spraying quantity is higher, and the water spraying effect can be further improved.

Further, the partition plate 22 may include a plurality of partition plates 22 may be disposed at intervals along the extending direction of the water containing chamber 201. That is, when the water spraying device 20 is mounted on the drum 10, the plurality of partition plates 22 may be arranged at intervals along the circumferential direction of the drum 10, so that the plurality of water distribution cavities 2011 may be distributed in the box 21 along the circumferential direction of the drum 10, the plurality of water distribution cavities 2011 may sequentially receive water and output water during the pivoting of the water spraying device 20 along with the drum 10, the water receiving and outputting effect of the water spraying device 20 is better, the water receiving and outputting time is relatively longer, and the water spraying effect is further improved.

Referring to fig. 2 to 5, the case 21 and the water chamber 201 extend in an arc shape in the circumferential direction of the drum 10, respectively. Thus, both the outer mounting surface 210 and the inner water spraying surface 220 of the case 21 may be formed as arc surfaces, which have better fit with the inner sidewall of the drum 10, are more firmly mounted, and have better water spraying effect. As shown in fig. 4, the entire outer surface of the case 21 may be smoothly disposed, and corners of the case 21 may be smoothly transited. Thus, the abrasion of the shower 20 to the laundry can be reduced, and the washing damage of the laundry can be reduced. As shown in fig. 4, the outer mounting surface 210 and the inner water spraying surface 220 may be formed as substantially parallel arcuate surfaces. Therefore, the appearance effect can be improved, the abrasion to clothes is smaller, and the water spraying effect is better.

As shown in fig. 4, the outer ends of the plurality of partition plates 22 may be connected to the outer mounting surface 210, and the inner ends of the plurality of partition plates 22 may be spaced apart from the inner water shower surface 220. Here, the outer end of the partition plate 22 is an end of the partition plate 22 away from the central axis of the drum 10, and the inner end of the partition plate 22 is an end of the partition plate 22 adjacent to the central axis of the drum 10. From this, the outer end accessible division board 22 of a plurality of water distribution cavities 2011 cuts off, and the inner intercommunication setting of a plurality of water distribution cavities 2011, and the water distribution effect is better to it is more thorough to go out the water, and the play water effect improves, can further improve the water drenching effect.

Further, the plurality of partition plates 22 may include a first partition plate 221 and a second partition plate 222, as shown in fig. 4, in the extending direction of the water containing chamber, the first partition plate 221 and the second partition plate 222 are respectively provided in both half chambers of the water containing chamber 201. Here, the two half cavities are two half cavities of the water containing cavity 201 distributed along the circumferential direction of the drum, and the two half cavities form the water containing cavity 201. The first barrier 221 and the second barrier 222 extend from outside to inside in a direction away from each other. Here, the direction extending from the outside to the inside is substantially along the radial direction of the drum 10 from the position away from the drum 10 toward the central axis of the drum 10. That is, from the outside to the inside, the first barrier 221 and the second barrier 222 extend away from each other, and the distance between the first barrier 221 and the second barrier 222 increases.

Thus, the first partition 221 and the second partition 222 may be approximately shaped like a Chinese character 'ba', and the two water diversion cavities 2011 partitioned by the first partition 221 and the second partition 222 extend obliquely relative to the radial direction of the drum 10 and have opposite extending directions, wherein one water diversion cavity 2011 can discharge water in the process that the water spraying device 20 rotates from a low position to a high position, the other water diversion cavity 2011 can discharge water in the process that the water spraying device 20 rotates from a high position to a low position, the water spraying device 20 sprays water more uniformly in the rotating process, and the water spraying effect is further improved.

In the embodiment shown in fig. 4, the number of the first partitions 221 and the second partitions 222 is four, respectively, and it is understood that the number of the first partitions 221 and the second partitions 222 is not limited thereto, and in the present invention, the number of the first partitions 221 may be one, two, three, five or more than five, and the number of the second partitions 222 may be one, two, three, five or more than five, that is, in the present invention, the number of the first partitions 221 and the second partitions 222 may be at least one, respectively, and the specific number may be flexibly set according to practical situations.

As shown in fig. 4, the first barrier 221 and the second barrier 222 may be formed as arc plates, respectively. Therefore, the flow guiding and separating effects can be improved, the water flow is smoother, and the water flow noise is smaller. The bending radian of the arc-shaped plate can be flexibly set according to actual conditions, and the invention is not particularly limited to the method.

Further, the plurality of first partitions 221 may be disposed in parallel, and the plurality of second partitions 222 may be disposed in parallel. Therefore, a plurality of arc-shaped plates which are arranged in parallel can be arranged in one half cavity of the water containing cavity 201, and a plurality of arc-shaped plates which are arranged in parallel can also be arranged in the other half cavity of the water containing cavity 201, so that the separation and flow guiding effects are good. The first partition plates 221 and the second partition plates 222 may be disposed at equal intervals, so that the distribution and the size of the water distribution cavity 2011 are more uniform, and the water inlet and outlet effects are better.

As shown in fig. 4, the distance between the adjacent first and

second separators

221 and 222 may be greater than the distance between the adjacent two first separators 221, and the distance between the adjacent first and

second separators

221 and 222 is also greater than the distance between the adjacent two second separators 222. The size of the water spraying holes 202 corresponding to the positions of the water diversion cavities 2011 between the adjacent first partition plate 221 and second partition plate 222 may be larger than the size of the water spraying holes 202 corresponding to the water diversion cavities 2011 partitioned by the first partition plate 221 and also larger than the size of the water spraying holes 202 corresponding to the water diversion cavities 2011 partitioned by the second partition plate 222. Therefore, the water outlet in the middle of the water spraying device 20 is larger, the water outlet at the two sides is smaller, the water power is stronger, and the water spraying effect is better.

In the present invention, the number and distribution of the shower holes 202 are not particularly limited. According to some embodiments of the present invention, the water spray holes 202 may be distributed in a matrix or the like, for example, the water spray holes 202 may be distributed in a plurality of rows along the circumferential direction of the drum 10, each row includes a plurality of water spray holes 202 disposed at intervals along the axial direction of the drum 10, and the plurality of water spray holes 202 in the same row may be the same size or different sizes, and the water spray holes 202 in different rows may be the same size or different sizes.

Referring to fig. 1 to 4, the water spray holes 202 may include seven rows, the water spray holes 202 in the middle row having the largest size, and the water spray holes 202 on both sides having smaller sizes, wherein the water spray holes 202 in the left and right rows located on both sides of the middle row and adjacent to the middle row have smaller sizes than the water spray holes 202 of the middle row and larger sizes than the water spray holes 202 of the one row located at the edge. Therefore, the water spraying device 20 has more water outlet in the middle, stronger waterpower and finer water outlet at the two sides, so that clothes can be well soaked, and the water spraying effect is good.

In some preferred embodiments of the present invention, the outer mounting surface 210 may be provided with a water outlet 203 in communication with the water containing cavity 201, and the water outlet 203 corresponds to the position of the water through hole 102 on the drum 10. Therefore, when the roller 10 is driven by the motor to spin, the water spraying device 20 can rotate at a high speed along with the roller 10, and water in the water containing cavity 201 can be sequentially discharged through the water outlet 203 and the water through hole 102 under the action of centrifugal force, so that the water draining performance is good.

As shown in fig. 5, the water outlet holes 203 may be distributed in two rows along the axial direction of the drum, and the two water outlet holes are respectively disposed adjacent to two ends of the case 21, that is, the two water outlet holes are respectively adjacent to two ends of the outer mounting surface 210 along the axial direction of the drum 10, and each water outlet hole 203 includes a plurality of water outlet holes 203 spaced apart along the circumferential direction of the drum 10. This facilitates water discharge, and further improves the water discharge effect.

As an alternative embodiment, the outer mounting surface 210 may be provided with a clamping portion, and the clamping portion may be connected to the drum 10 in a clamping manner, so that the water spraying device 20 may be clamped to the drum 10, so that the connection is firm and the operation is convenient. The specific structure of the clamping portion is not particularly limited, and for example, the clamping portion may be a structure capable of realizing clamping, such as a hook, a clamping column, or a clamping groove.

In some embodiments of the present invention, the cassette 21 is integrally formed with the divider plate 22. That is, the water shower 20 may be an integral piece. Therefore, the water spraying device 20 has strong strength and sealing performance, is convenient to form and simple to manufacture, omits redundant assembly parts and connection procedures, and is easier for industrial production.

The material of the case 21 and the partition plate 22 may be the same or different. The case 21 and the partition plate 22 may be made of metal or plastic. In some embodiments of the present invention, the drum 10, the box 21 and the partition plate 22 are all made of stainless steel, so that the strength is high, rust is avoided, and the washing effect is good.

Of course, the case 21 and the partition plate 22 may be formed separately. Therefore, when manufacturing the shower device 20, the partition plate 22 formed by manufacturing is only required to be installed in the box body 21, so that the shower device is convenient to manufacture and convenient to replace.

A drum 10 washing machine according to an embodiment of the present invention may include a drum assembly 100 according to an embodiment of the present invention. Since the drum assembly 100 according to the embodiment of the present invention has the above advantageous technical effects, the washing effect and efficiency of the drum 10 washing machine according to the embodiment of the present invention are improved, and the cost is reduced.

Other constructions and operations of the drum 10 washing machine, the drum assembly 100, and the shower device 20 according to the embodiment of the present invention will be known to those skilled in the art, and will not be described in detail herein.

In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to the terms "embodiment," "specific embodiment," "example," or "specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Claims

1. A water shower apparatus for a drum washing machine, comprising:

the box body is internally provided with a water containing cavity, the box body is provided with an outer mounting surface used for being connected with a roller of the roller washing machine and an inner water spraying surface opposite to the outer mounting surface, and the inner water spraying surface is provided with at least one water spraying hole communicated with the water containing cavity;

at least one partition plate, at least one partition plate is arranged in the water containing cavity to divide the water containing cavity into a plurality of water distributing cavities, and each water distributing cavity is connected with at least one water spraying hole;

the box body is suitable for being arranged on the inner side wall of the roller, the water containing cavity extends along the circumferential direction of the roller, the partition plates comprise a plurality of partition plates, and the partition plates are arranged at intervals along the circumferential direction of the roller;

the outer ends of the plurality of partition plates are connected with the outer mounting surface, and the inner ends of the plurality of partition plates are spaced apart from the inner water spraying surface so as to enable the plurality of water diversion cavities to be communicated;

the partition plates comprise at least one first partition plate and at least one second partition plate, the first partition plate and the second partition plate are respectively arranged in the two half cavities of the water containing cavity, and the first partition plate and the second partition plate extend from outside to inside towards the direction away from each other.

2. The water spraying apparatus for a drum washing machine as claimed in claim 1, wherein the water spraying holes are distributed in a plurality of rows along a circumferential direction of the drum, each row including a plurality of the water spraying holes spaced apart along an axial direction of the drum.

3. The water spraying device for the drum washing machine as claimed in claim 1, wherein the outer installation surface is provided with a water outlet hole communicated with the water containing cavity, and the water outlet hole corresponds to a water through hole on the drum.

4. A water spraying device for a drum washing machine as claimed in claim 3, wherein the water outlet holes are distributed in two rows along the axial direction of the drum, the two water outlet holes are respectively disposed adjacent to both ends of the case, and each row includes a plurality of water outlet holes spaced apart along the circumferential direction of the drum.

5. The water spraying apparatus for a drum washing machine as claimed in claim 1, wherein the case and the water receiving chamber are respectively extended in an arc shape along a circumferential direction of the drum.

6. The water spraying apparatus for a drum washing machine as claimed in claim 1, wherein the first and second partitions each comprise a plurality of and are each formed as an arc plate.

7. The water spraying apparatus for a drum washing machine as claimed in claim 1, wherein a plurality of the first partitions are disposed in parallel, a plurality of the second partitions are disposed in parallel, and a distance between adjacent ones of the first partitions and the second partitions is greater than a distance between adjacent ones of the first partitions and a distance between adjacent ones of the second partitions.

8. The water spraying device for a drum washing machine as claimed in claim 1, wherein the outer installation surface is provided with a clamping part adapted to be clamped with the drum.

9. The water spraying device for a drum washing machine as claimed in any one of claims 1 to 8, wherein the case is integrally formed with the partition plate.

10. A roller assembly, comprising:

the cylinder is internally limited with a cylinder cavity, and the side wall of the cylinder is provided with a water through hole;

the water spraying device for a drum washing machine as claimed in any one of claims 1 to 9, which is connected to the drum and provided in the drum chamber, the water spraying device comprising at least one.

11. The roller assembly of claim 10, wherein the cassette is removably coupled to the roller assembly.

12. A drum washing machine comprising a drum assembly according to claim 10 or 11.