CN113136701A

CN113136701A - Clothes treating apparatus

Info

Publication number: CN113136701A
Application number: CN202010051027.9A
Authority: CN
Inventors: 刘庆博; 王萧峰; 孔韵涛
Original assignee: Bo Xihua Electric Jiangsu Co Ltd
Current assignee: Bo Xihua Electric Jiangsu Co Ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2021-07-20
Anticipated expiration: 2040-01-17
Also published as: CN113136701B

Abstract

The embodiment of the application provides a clothes treatment device. The clothes treating apparatus includes an outer tub and a tuned liquid cylindrical vibration absorber provided to the outer tub. The tuning liquid cylindrical vibration absorber comprises a container and liquid arranged in the container, and an included angle is formed between a plane where a flow path of the liquid is located and the central axis of the outer cylinder. Compared with the prior art, the clothes treatment equipment provided by the embodiment of the application can reduce the vibration of the clothes treatment equipment by utilizing the flow of the liquid in the tuning liquid cylindrical vibration absorber. Particularly, an included angle is formed between a plane where the flow path of the liquid is located and the central axis of the outer cylinder, so that the flow direction of the liquid in the tuning liquid cylindrical vibration absorber corresponds to the vibration direction of the outer cylinder, and a good vibration reduction effect is achieved.

Description

Clothes treating apparatus

Technical Field

The invention relates to the technical field of electric appliances, in particular to clothes treatment equipment.

Background

With the continuous improvement of the requirements of people on the environmental quality, the problems of vibration, noise and the like generated by electric appliances are more and more concerned by people. Especially for the clothes treatment equipment, the problems of overlarge vibration, overlarge noise, even the collision of the outer cylinder to the box body and the like often exist, and the service performance and the use experience are seriously influenced.

Disclosure of Invention

It is an object of embodiments of the present invention to overcome the disadvantages of the prior art and to provide an improved laundry treatment apparatus.

The clothes treatment equipment provided by the embodiment of the invention comprises: an outer cylinder; the tuning liquid cylindrical vibration absorber is arranged on the outer cylinder; the tuning liquid cylindrical vibration absorber comprises a container and liquid arranged in the container, and an included angle is formed between a plane where a flow path of the liquid is located and the central axis of the outer cylinder.

Optionally, the outer barrel has a central axis that is horizontal or inclined with respect to the horizontal.

Optionally, the included angle is greater than 0 degrees and less than 180 degrees.

Optionally, the method further comprises: a case disposed outside the outer tub; and the elastic damping component is connected with the outer barrel and the box body and enables the outer barrel to be arranged in the box body in a suspended mode.

Optionally, the container comprises a cylindrical cavity adapted to contain the liquid, the cavity having a first section at the bottom in the vertical direction and a second and a third section higher on either side of the first section, respectively, the liquid filling the cross-section of the first section and leaving a void above the second and third sections, respectively, for the liquid to flow back and forth.

Optionally, the cavity comprises an O-shaped cavity, a U-shaped cavity, a concave cavity, a V-shaped cavity, or a W-shaped cavity.

Optionally, the cavity has a centre line of symmetry which lies in the same vertical plane as the central axis of the outer barrel.

Optionally, the container has an arcuate or annular configuration that engages the outer periphery of the outer barrel, the cavity being located within the arcuate or annular configuration.

Optionally, the arcuate structure or the annular structure is disposed coaxially with the outer barrel.

Optionally, the tuned liquid cylindrical vibration absorber further comprises a blocking portion disposed within the cavity, the blocking portion being adapted to increase the resistance to the flow of liquid within the cavity and to match the frequency range of the tuned liquid cylindrical vibration absorber to the vibration frequency range of the laundry treatment apparatus.

Optionally, the blocking portion comprises a flap having a through hole, an edge of the flap engaging a sidewall of the cavity.

Optionally, the blocking portion comprises a stop that engages a portion of the sidewall of the cavity and forms a gap with another portion of the sidewall.

Optionally, the blocking portion is located within the first section of the cavity.

Compared with the prior art, the technical scheme of the embodiment of the invention has the beneficial effect. For example, by providing an angle between the plane where the flow path of the liquid in the tuned liquid cylindrical vibration absorber is located and the central axis of the outer cylinder, the flow direction of the liquid in the tuned liquid cylindrical vibration absorber can be made to correspond to the vibration direction of the outer cylinder, thereby achieving a good vibration damping effect.

For another example, the liquid column height of the second section and the third section in the tuned liquid column vibration absorber can be adjusted to make the vibration absorbing frequency of the tuned liquid column vibration absorber equal to or close to the vibration frequency of the outer cylinder, so that the tuned liquid column vibration absorber can perform good vibration and noise reduction on the outer cylinder.

For another example, the blocking part is arranged in the tuning liquid cylindrical vibration absorber, so that the damping can be increased, and the vibration absorption frequency of the tuning liquid cylindrical vibration absorber can be widened, so that the tuning liquid cylindrical vibration absorber can better perform vibration reduction and noise reduction on the outer cylinder.

For another example, a plurality of tuned liquid cylindrical vibration absorbers may be provided according to the operating speeds of the inner cylinder in different operating modes, and each tuned liquid cylindrical vibration absorber corresponds to a different operating speed, so that the laundry treating apparatus can perform vibration and noise reduction through the tuned liquid cylindrical vibration absorber in each of the different operating modes.

For another example, the tuned liquid cylindrical vibration absorber provided by the embodiment of the invention has the characteristics of simple structure, easy installation and the like, and the structure of the existing clothes treatment equipment does not need to be changed in the installation process.

Drawings

Fig. 1 is a schematic view illustrating a structure of a laundry treating apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view showing the construction of another clothes treating apparatus according to an embodiment of the present invention;

figure 3 is a schematic perspective view of a portion of a tuned liquid cylindrical vibration absorber in an embodiment of the present invention; wherein the central axis l of the outer cartridge and the plane S in which the flow path of the liquid lies are shown;

figure 4 is a schematic partial perspective view of another tuned liquid cylindrical vibration absorber in accordance with an embodiment of the present invention;

figure 5 is a schematic perspective view of a portion of a third tuned liquid cylinder absorber in accordance with an embodiment of the present invention;

figure 6 is a schematic diagram of the structure of a fourth tuned liquid cylinder absorber in accordance with an embodiment of the present invention;

figure 7 is a schematic perspective view of a portion of a fifth tuned liquid cylinder absorber in accordance with an embodiment of the present invention.

Detailed Description

As described in the background art, the laundry treatment apparatus often has problems of excessive vibration, excessive noise, and even impact of the outer tub on the cabinet, which seriously affects the use performance and experience of the laundry treatment apparatus.

To solve the above technical problems, embodiments of the present invention provide an improved laundry treating apparatus. The clothes treating apparatus includes an outer tub and a tuned liquid cylindrical vibration absorber provided to the outer tub. The tuning liquid cylindrical vibration absorber comprises a container and liquid arranged in the container, and an included angle is formed between a plane where a flow path of the liquid is located and the central axis of the outer cylinder.

Compared with the prior art, the clothes treatment equipment provided by the embodiment of the invention can reduce the vibration of the clothes treatment equipment by tuning the flow of the liquid in the liquid cylindrical vibration absorber. Particularly, an included angle is formed between a plane where the flow path of the liquid is located and the central axis of the outer cylinder, so that the flow direction of the liquid in the tuning liquid cylindrical vibration absorber corresponds to the vibration direction of the outer cylinder, and a good vibration reduction effect is achieved.

In the technical solution provided by the embodiment of the present invention, the laundry treatment apparatus may include a drum-type laundry treatment apparatus, or a pulsator-type laundry treatment apparatus.

Specifically, the clothes treatment apparatus of the two forms can comprise an outer drum, an inner drum and a driving system. The inner cylinder is arranged in the outer cylinder and can rotate relative to the outer cylinder under the drive of the drive system. The force generated by the rotation of the inner drum can be transmitted to the outer drum and cause vibration of the outer drum.

In order to make the objects, features and advantages of the embodiments of the present invention more comprehensible, specific embodiments accompanied with figures are described in detail below.

In order to facilitate description of the laundry treating apparatus provided in the embodiment of the present invention, three directions, i.e., an upper direction, a right direction, and a rear direction, are illustrated in some of the drawings provided in the embodiment of the present invention, and are determined based on a view from a user facing the laundry treating apparatus in a normal use state. Wherein, the "rear" represents a direction of the laundry treating apparatus away from the user side; other directions including "up", "right", and "down", "left", and "front" are determined based on the foregoing "rear" direction divided by natural orientation. It should be understood that from other viewing angles of the laundry treating apparatus, there may be up, down, left, right, front, and rear directions corresponding to the respective viewing angles; the upper, lower, left, right, front and rear directions illustrated in some of the drawings provided in the embodiments of the present invention are only for convenience of describing the technical solutions of the embodiments of the present invention, and do not constitute a limiting explanation of the solutions.

In addition, it should be noted that the drawings provided in the embodiments of the present invention, especially the partial perspective schematic views, are only used for convenience and clarity to assist understanding of the technical solutions provided in the embodiments of the present invention, and are not limitations or limitations of the technical solutions provided in the embodiments of the present invention.

FIG. 1 is a schematic view showing a structure of a laundry treating apparatus according to an embodiment of the present invention; fig. 2 is another structural schematic view of the laundry treating apparatus according to the embodiment of the present invention.

As shown in fig. 1 and 2, the laundry treating apparatus 10 includes an outer tub 100, an inner tub 200, and a tuned liquid cylindrical vibration absorber 300. Wherein the inner cylinder 200 is rotatably provided in the outer cylinder 100, and the tuned liquid cylindrical vibration absorber 300 is provided on the outer cylinder 100.

In one or more embodiments, the laundry treating apparatus 10 may be drum-type, with an outer drum 100 having a central axis l that is horizontal or inclined with respect to the horizontal.

The tuned liquid cylindrical vibration absorber 300 is a dynamic vibration absorber device. The dynamic vibration absorber is an apparatus for reducing vibration of an object by absorbing vibration energy of the object using a resonance system, and is based on the principle that the resonance system is added to the object and the vibration of the object is reduced by a reaction force generated by the resonance system at the time of resonance. For the tuned liquid cylindrical vibration absorber 300, it mainly uses the dynamic force generated by the liquid during the flow process to reduce the vibration of the object.

Figure 3 is a schematic partial perspective view of a tuned liquid cylindrical vibration absorber in an embodiment of the invention showing the central axis l of the outer cartridge and the plane S in which the flow path of the liquid lies.

As shown in fig. 3, the tuned liquid cylindrical absorber 300 comprises a container 310 and a liquid 320 disposed within the container 310.

In one or more embodiments, the liquid 320 may include water, silicone oil, or glycerin.

For the tuned liquid cylindrical vibration absorber 300, the liquid 320 may flow within the container 310 with the plane S in which the flow path of the liquid 320 lies at an angle θ to the central axis l of the tub 100.

In general, the angle between a plane and an axis can be acute or obtuse.

In the technical solution provided by the embodiment of the present invention, the included angle θ between the plane S where the flow path of the liquid 320 is located and the central axis l of the tub 100 is in the range of more than 0 degree and less than 180 degrees. In other words, the plane S on which the flow path of the liquid 320 is located is not parallel to the central axis l of the tub 100.

Generally, the tub 100 and the drum 200 of the laundry treating apparatus 10 may be coaxially disposed therebetween and have a common central axis l. The inner tub 200 rotates around the central axis l and transmits a force generated by the rotation thereof to the outer tub 100, thereby causing vibration of the outer tub 100. As such, the vibration direction of the outer tub 100 tends to be non-parallel to the central axis l thereof.

In the technical solution provided by the embodiment of the present invention, the plane S on which the flow path of the liquid 320 is located and the central axis l of the outer cylinder 100 are not parallel, so that the flow direction of the liquid 320 and the vibration direction of the outer cylinder 100 can better correspond to each other, and thus the tuned liquid cylindrical vibration absorber 300 is effectively utilized to damp and reduce the noise of the outer cylinder 100.

In one or more preferred embodiments, the angle θ between the plane S in which the flow path of the liquid 320 is located and the central axis l of the tub 100 may be 90 degrees. In other words, a plane S on which the flow path of the liquid 320 is located and the central axis l of the tub 100 may be vertically disposed.

Since the tub 100 and the drum 200 of the laundry treating apparatus 10 are coaxially disposed with each other, and have a common central axis l around which the drum 200 can rotate, the vibration of the tub 100 due to the rotation of the drum 200 tends to occur mostly in a plane perpendicular to the central axis l of the tub 100.

In the technical solution provided by the embodiment of the present invention, setting the plane S where the flow path of the liquid 320 is located to be perpendicular to the central axis l of the tub 100 can improve the vibration absorbing efficiency of the tuned liquid cylindrical vibration absorber 300 and efficiently utilize the power generated by the flow of the liquid 320 in the container 310 to reduce the vibration of the tub 100.

By adopting the technical scheme provided by the embodiment of the invention, the outer cylinder 100 can be subjected to vibration reduction and noise reduction by utilizing the tuned liquid cylindrical vibration absorber 300, and the vibration absorption efficiency of the tuned liquid cylindrical vibration absorber 300 can be improved, so that the resource, the cost and the environmental quality are saved.

figure 5 is a schematic perspective view of a portion of a third tuned liquid cylinder absorber in accordance with an embodiment of the present invention.

Referring to fig. 3 to 5, in the solution provided by the embodiment of the present invention, the container 310 may include a cylindrical cavity 330 adapted to contain the liquid 320.

Specifically, the cavity 330 has a first section 331 located at the bottom of the container 310 in the vertical direction, and a second section 332 and a third section 333 located at both sides of the first section 331 and higher, respectively. The liquid 320 fills the cross section of the first section 331 and extends longitudinally into the second section 332 and the third section 333, and a gap 334 is left above the second section 332 and the third section 333 for the liquid 320 to flow back and forth.

In implementations, the cavity 330 may have different shapes. For example, the cavity 330 may be an O-shaped cavity (as shown in FIG. 3), a U-shaped cavity (as shown in FIG. 4), a concave cavity (as shown in FIG. 5), a V-shaped cavity, or a W-shaped cavity.

In one or more embodiments, the cavity 330 has a center line of symmetry that may lie in the same vertical plane as the center axis/of the outer barrel.

In other preferred embodiments, the symmetry center line may also coincide with the central axis l of the outer cylinder. In this way, it is possible to ensure that the plane S on which the flow path of the liquid 320 is located is vertically disposed between the central axis l of the tub 100.

Referring to fig. 3-5, in one or more embodiments, the container 310 may have a shape that mates with the cavity 330.

Figure 6 is a schematic diagram of the structure of a fourth tuned liquid cylinder absorber in accordance with an embodiment of the present invention.

Referring to fig. 1 to 4 and 6, in other embodiments, the container 310 may further have an arc structure or a ring structure that is matched with the outer circumference of the tub 100, and the cavity 330 is located in the arc structure or the ring structure.

In one or more preferred embodiments, the arcuate or annular configuration of the container 310 is disposed coaxially with the tub 100. In this manner, it is convenient for the plane S in which the flow path of the liquid 320 in the container 310 is located to be vertically disposed between the central axis l of the tub 100.

In the specific example shown in fig. 1, the tuned liquid cylindrical vibration absorber 300 may be sleeved at the front end of the outer tub 100 by the annular structure of its container 310.

In one or more embodiments, the container 310 and the front end of the outer tub 100 can be connected together in a male-female manner.

In the specific example shown in fig. 2 and 6, the tuned liquid cylindrical vibration absorber 300 may be integrally sleeved on the outer circumference of the outer tub 100 by the annular structure of the container 310 thereof.

In one or more embodiments, the annular configuration of the container 310 can have an inner circumferential profile that matches an outer circumferential profile of the tub 100. Thus, the container 310 can be stably sleeved on the outer circumference of the outer tub 100 by its annular structure.

In the specific example shown in fig. 4, the tuned liquid cylindrical vibration absorber 300 may be fitted over the front end or outer circumference of the outer tub 100 by the arc-shaped structure of its container 310.

In the specific example shown in fig. 5, the tuned liquid cylindrical vibration absorber 300 may be provided at the top or bottom of the tub 100.

Referring to fig. 3 and 7, the tuned liquid cylindrical vibration absorber 300 further comprises a baffle 340 disposed within the cavity 330, the baffle 340 being adapted to increase the resistance to the flow of the liquid 320 within the cavity 330 and to match the frequency range of the tuned liquid cylindrical vibration absorber 300 to the vibration frequency range of the laundry treating apparatus 10.

The provision of the damper 340 in the cavity 330 not only increases the damping but also widens the vibration absorbing frequency of the tuned liquid cylindrical vibration absorber 300, so that the tuned liquid cylindrical vibration absorber 300 can better damp and reduce the noise of the outer cylinder 100.

Referring to fig. 3, in one or more embodiments, the blocking portion 340 may include a baffle having a through hole 341, an edge of the baffle being completely engaged with an inner sidewall of the cavity 330, the through hole 341 being adapted for the liquid 320 to flow through.

Referring to fig. 7, in other embodiments, the blocking portion 340 may include a stopper that engages a portion of the inner sidewall of the cavity 330 and forms a gap with another portion of the inner sidewall of the cavity 330, the gap being suitable for the liquid 320 to flow through.

With continued reference to fig. 3 and 7, in some preferred embodiments, the stop 340 is located within the first section 331 of the cavity 330.

In an ideal state, for the laundry treating apparatus 10, the vibration frequency F of the outer drum 100 thereof has the following relationship with the rotation speed v of the inner drum 200:

F＝v/60。

in an ideal state, for the tuned liquid column vibration absorber 300, the vibration absorbing frequency f has the following relationship with the liquid column height h of the second section 332 and the third section 333:

where g is the acceleration of gravity.

In order to achieve a preferable vibration absorbing effect, the liquid column height h of the second section 332 and the third section 333 may be calculated by setting F to F, and the vibration absorbing frequency F of the tuned liquid column vibration absorber 300 may be equal to or close to the vibration frequency F of the outer tub 100 by adjusting the liquid column height h of the second section 332 and the third section 333. In this way, the tuned liquid cylindrical vibration absorber 300 can perform excellent vibration damping and noise reduction on the outer cylinder 100.

In the specific implementation, the influence of the total mass of the liquid 320, the pipe diameters of the second section 332 and the third section 333, the hole diameter of the baffle plate or the size of the stop block on the damping effect needs to be considered. The specific effect can be obtained by relevant experiments. In view of the fact that the relevant experiments are common general knowledge in the field of tuning liquid cylindrical vibration absorbers, they will not be described in detail here.

In one or more embodiments, the laundry treating apparatus 10 may set a plurality of tuned liquid cylindrical-shaped vibration absorbers 300 according to the operating rotation speed of the drum 200 in different operation modes, and make each tuned liquid cylindrical-shaped vibration absorber 300 correspond to a different operating rotation speed. In this way, the laundry treatment apparatus 10 can be made to perform vibration damping and noise reduction through the corresponding tuned liquid cylindrical vibration absorber 300 under different operation modes.

In the technical solution provided by the embodiment of the present invention, the laundry treating apparatus 10 further includes a cabinet disposed outside the tub 100 and not in direct contact with the tub 100. The arrangement of the box is conventional in the art and will not be described in detail here.

Referring to fig. 1 and 2, the laundry treating apparatus 10 further includes an elastic damping assembly 400. Both ends of the elastic damping member 400 are connected to the outer tub 100 and the cabinet, respectively, and the outer tub 100 is suspended in the cabinet.

In some preferred embodiments, the elastic damping assembly 400 may be provided in two sets. One set is disposed at the left upper side of the outer tub 100, and the other set is disposed at the right upper side of the outer tub 100. The elastic damping member 400 located at the upper left of the tub 100 includes an upper left end and a lower right end, the lower right end of which is connected to the upper left end of the tub 100, and the upper left end of which is connected to the left inner sidewall of the cabinet. The elastic damping member 400 located at the upper right of the tub 100 includes an upper right end and a lower left end, the lower left end of which is connected to the upper right end of the tub 100, and the upper right end of which is connected to the right inner sidewall of the cabinet.

In a particular implementation, the elastic damping assembly 400 may include a hook 410 and an elastic member 420. The hook 410 and the elastic member 420 are connected to each other through one end thereof, and the other end of the hook 410 is connected to the case; the other end of the elastic member 420 is connected to the outer tub 100. The elastic member 420 may employ a spring.

In the technical solution provided by the embodiment of the present invention, the laundry treating apparatus 10 further includes a vibration damping support 500 disposed at the bottom of the tub 100. One end of the vibration-damping support 500 is connected to the bottom of the outer tub 100, and the other end thereof is connected to the inner bottom wall of the cabinet.

In some preferred embodiments, there may be two shock mounts 500. Among them, one vibration damping support 500 is provided obliquely to the left and lower with respect to the bottom of the outer cylinder 100, and one vibration damping support 500 is provided obliquely to the right and lower with respect to the bottom of the outer cylinder 100.

In particular implementations, the shock mount 500 may employ a damping shock absorber as is known in the art.

The clothes treatment equipment 10 provided by the embodiment of the invention is additionally provided with the elastic damping component 400 and the vibration reduction support 500 on the basis of vibration reduction by utilizing the tuned liquid cylindrical vibration absorber 300, so that the vibration reduction and noise reduction effects can be further improved.

While specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even where only a single embodiment is described with respect to a particular feature. The characteristic examples provided in the present disclosure are intended to be illustrative, not limiting, unless differently stated. In particular implementations, the features of one or more dependent claims may be combined with those of the independent claims as technically feasible according to the actual requirements, and the features from the respective independent claims may be combined in any appropriate manner and not merely by the specific combinations enumerated in the claims.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A laundry treatment apparatus (10), characterized by comprising:

an outer tub (100);

a tuned liquid cylindrical vibration absorber (300) provided on the outer tub (100);

wherein the tuned liquid cylindrical vibration absorber (300) comprises a container (310) and a liquid (320) disposed in the container (310), and a plane (S) on which a flow path of the liquid (320) is located has an angle (theta) with a central axis (l) of the tub (100).

2. The laundry processing apparatus (10) according to claim 1, characterized in that the tub (100) has a central axis (i) that is horizontal or inclined with respect to the horizontal.

3. The laundry treatment apparatus (10) according to claim 1 or 2, characterized in that the included angle (θ) is greater than 0 degrees and less than 180 degrees.

4. The laundry processing apparatus (10) according to claim 1 or 2, further comprising:

a box body provided outside the outer tub (100);

and the elastic damping component (400) is connected with the outer cylinder (100) and the box body and enables the outer cylinder (100) to be arranged in the box body in a suspended mode.

5. The laundry treatment apparatus (10) according to claim 1 or 2, characterized in that the container (310) comprises a cylindrical cavity (330) adapted to contain the liquid (320), the cavity (330) having a first section (331) at the bottom in the vertical direction and a second section (332) and a third section (333) higher up, respectively located at both sides of the first section (331), the liquid (320) filling the cross section of the first section (331), and a void (334) for the reciprocating flow of the liquid (320) being left above the second section (332) and the third section (333), respectively.

6. The laundry processing apparatus (10) according to claim 5, characterized in that the cavity (330) comprises an O-shaped cavity, a U-shaped cavity, a concave cavity, a V-shaped cavity or a W-shaped cavity.

7. The laundry processing apparatus (10) according to claim 5, characterized in that the cavity (330) has a symmetrical centerline which is in the same vertical plane as the central axis of the tub (100).

8. The laundry processing apparatus (10) according to claim 5, characterized in that the container (310) has an arc-shaped structure or a ring-shaped structure cooperating with the outer circumference of the tub (100), the cavity (330) being located within the arc-shaped structure or the ring-shaped structure.

9. The laundry processing apparatus (10) according to claim 8, characterized in that the arc structure or the ring structure is arranged coaxially with the tub (100).

10. The laundry treatment apparatus (10) according to claim 5, characterized in that the tuned liquid cylindrical vibration absorber (300) further comprises a blocking portion (340) disposed within the cavity (330), the blocking portion (340) being adapted to increase the resistance of the liquid (320) to flow within the cavity (330) and to match the frequency range of the tuned liquid cylindrical vibration absorber (300) to the vibration frequency range of the laundry treatment apparatus (10).

11. The laundry processing apparatus (10) according to claim 10, characterized in that the blocking portion (340) comprises a flap having a through hole (341), the edge of the flap engaging the side wall of the cavity (330).

12. The laundry processing apparatus (10) according to claim 10, characterized in that the blocking portion (340) comprises a stopper engaging a portion of a sidewall of the cavity (330) and forming a gap with other portions of the sidewall.

13. The laundry treatment apparatus (10) according to claim 10, characterized in that the blocking portion (340) is located within the first section (331) of the cavity (330).