WO2019214517A1

WO2019214517A1 - Drum washing machine and spraying system thereof

Info

Publication number: WO2019214517A1
Application number: PCT/CN2019/085251
Authority: WO
Inventors: 吕佩师; 许升; 赵志强; 赵新宇
Original assignee: 青岛海尔滚筒洗衣机有限公司
Priority date: 2018-05-10
Filing date: 2019-04-30
Publication date: 2019-11-14
Also published as: CN110468559B; CN110468559A

Abstract

A drum washing machine and a spraying system thereof. The drum washing machine comprises a machine body (1), an outer tub (2), and an inner tub (3) sequentially provided from outside to inside. The spraying system comprises a circulating pump (8), a control valve (10), and a plurality of nozzles (12). A water inlet of the circulating pump (8) leads to the outer tub (2), and a water outlet of the circulating pump (8) is separately connected to the plurality of nozzles (12) by means of the control valve (10). The plurality of nozzles (12) is provided near the front end of the outer tub (2). During working, the circulating pump (8) pumps the washing water in the outer tub (2) to the control valve (10), the control valve (10) selectively distributes the washing water to one or more of the plurality of nozzles (12), and then the nozzles (12) spray the washing water into the inner tub (3). The drum washing machine can spray clothes in a targeted manner by means of the control valve (10), and thus, the spraying effect of the drum washing machine is optimized.

Description

Drum washing machine and its sprinkler system

Technical field

The invention belongs to the field of household appliances, and particularly provides a drum washing machine and a spraying system thereof.

Background technique

The existing drum washing machine originates from Europe, and mainly includes a box body, an outer tube and an inner tube from the outside to the inside. The working principle of the drum washing machine is similar to that of the hammer hammer hitting the clothes. When working, the inner cylinder rotates under the driving of the driving motor. As the inner cylinder rotates, the laundry is continuously lifted and lowered in the drum, and then lifted and then dropped, and repeated motion is performed. The clothes are washed cleaned by the combination of washing powder and water.

In order to improve the effect of water flushing and rinsing, some drum washing machines are also provided with a circulating spray device. A drum type washing machine disclosed in the patent document of the publication No. CN102482834B, in which a circulation path is provided, one end of the circulation path leads to a bottom end of a water tank (outer tube), and the other end of the circulation path leads to a water tank opening A plurality of discharge ports at the edge, and a circulation pump is disposed in the middle of the circulation path. When the circulation pump is in operation, the washing water can be supplied from the bottom end of the water tank to the plurality of discharge ports through a circulation path, and the plurality of discharge ports simultaneously spray the washing water into the drum (inner cylinder) to circulate the laundry.

However, the drum type washing machine disclosed in the patent document of the publication No. CN102482834B has a single spray mode, and has a poor spray effect on clothes.

Accordingly, there is a need in the art for a new drum washing machine and its spray system to solve the above problems.

Summary of the invention

In order to solve the above problems in the prior art, that is, in order to solve the problem that the spray washing effect of the existing drum washing machine having the circulating spray function is poor, the present invention provides a spray system of a drum washing machine, and the drum washing machine includes a tank body, an outer cylinder and an inner cylinder which are arranged in order from the outside to the inside, the sprinkling system comprises a circulation pump, a control valve and a plurality of nozzles; the water inlet of the circulation pump leads into the outer cylinder, the circulation a water outlet of the pump is respectively connected to the plurality of nozzles through the control valve; the plurality of nozzles are disposed near a front end of the outer cylinder; in operation, the circulation pump sends a washing water pump in the outer cylinder The control valve selectively delivers wash water to one or more of the plurality of nozzles, which in turn spray wash water into the inner cylinder.

In a preferred embodiment of the above spray system, the control valve includes a multi-way valve including a water inlet valve port and a plurality of water outlet valve ports, the water inlet valve port and the circulation pump The water outlets are connected, and each of the outlet valve ports is respectively connected with one or more of the nozzles.

In a preferred embodiment of the above spray system, the multi-way valve is a four-way valve having a water inlet valve port and three water outlet valve ports, the plurality of nozzles including a first group of nozzles, a second group of nozzles, and A third group of nozzles, each of which is connected to a group of nozzles.

In a preferred embodiment of the above spray system, the four-way valve comprises:

a first switching position for communicating the water outlet of the circulation pump with a set of nozzles;

a second switching position for communicating the water outlet of the circulation pump with two sets of nozzles;

a third switching position for communicating the water outlet of the circulation pump with the three sets of nozzles;

a fourth switching position for disconnecting the water outlet of the circulation pump from the three sets of nozzles.

In a preferred embodiment of the above spray system, the cross section of the spool of the four-way valve aligned with the four valve ports is fan-shaped.

a first switching position for communicating the water outlet of the circulation pump with the first group of nozzles;

a second switching position for communicating the water outlet of the circulation pump with the second group of nozzles;

a third switching position for communicating the water outlet of the circulation pump with the third group of nozzles;

a fourth switching position for connecting the water outlet of the circulation pump with all three sets of nozzles;

a fifth switching position for disconnecting the water outlet of the circulation pump from the three sets of nozzles.

In a preferred embodiment of the above spray system, the spool of the four-way valve is aligned with the four valve ports in a Y-shaped cross section, and a through hole is formed in one branch of the Y-shaped portion.

In a preferred embodiment of the above spray system, the control valve includes a plurality of shutoff valves, and each of the inlet valves of the shutoff valve is in communication with a water outlet of the circulation pump, and each of the shutoff valves The outlet valve port is connected to one or more of the nozzles.

In a preferred embodiment of the above spray system, the control valve is an electromagnetic control valve; and/or the plurality of nozzles are disposed at equal intervals along the circumference of the outer cylinder.

Furthermore, the present invention provides a drum washing machine comprising the shower system of any of the above preferred embodiments of the spray system.

It will be understood by those skilled in the art that in a preferred embodiment of the present invention, by providing a control valve between the circulation pump and the plurality of nozzles, the control can selectively deliver the wash water pumped by the circulation pump to the control One or more of the plurality of nozzles specifically spray the laundry in the inner cylinder. Therefore, the drum washing machine of the present invention can not only spray the laundry in a targeted manner through the control valve, but also optimize the spray effect of the drum washing machine; and also make the drum washing machine have a plurality of spray modes, which is convenient for the user to select and optimize the use of the user. Experience.

In one embodiment of the invention, the control valve is a four-way solenoid control valve. The inlet valve port of the four-way valve is in communication with the water outlet of the circulation pump, and each of the outlet valves of the four-way valve is in communication with a group of nozzles. When the four-way valve is switched to the first switching position, the circulation pump is in communication with a group of nozzles; when the four-way valve is switched to the second switching position, the circulation pump is in communication with the two sets of nozzles; when the four-way valve is switched to the third switching When in position, the circulation pump is in communication with the three sets of nozzles; when the four-way valve is switched to the fourth switching position, the circulation pump is completely disconnected from the three sets of nozzles.

DRAWINGS

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings in which:

Figure 1 is an internal structural view of a drum washing machine of the present invention;

Figure 2 is a cross-sectional view of Figure 1 taken along the line A-A;

Figure 3 is an enlarged view of a portion B of Figure 2;

Figure 4 is a partial structural schematic view of the sprinkler system of the present invention;

Figure 5a is a cross-sectional view of the control valve in the first switching position in the first embodiment;

Figure 5b is a cross-sectional view of the control valve in the second switching position in the first embodiment

Figure 5c is a cross-sectional view of the control valve in the third switching position in the first embodiment

Figure 6a is a schematic view showing a first spray mode of the drum washing machine in the first embodiment;

Figure 6b is a schematic view showing a second spray mode of the drum washing machine in the first embodiment;

Figure 6c is a schematic view showing a third spray mode of the drum washing machine in the first embodiment;

Figure 7a is a cross-sectional view of the control valve in the first switching position in the second embodiment;

Figure 7b is a cross-sectional view of the control valve in the second switching position in the second embodiment;

Figure 7c is a cross-sectional view showing the control valve in the third switching position in the second embodiment;

Figure 7d is a cross-sectional view of the control valve in the fourth switching position in the second embodiment;

Figure 8a is a schematic view showing a first spray mode of the drum washing machine in the second embodiment;

Figure 8b is a schematic view showing a second spray mode of the drum washing machine in the second embodiment;

Figure 8c is a schematic view showing a third spray mode of the drum washing machine in the second embodiment;

Fig. 8d is a schematic view showing the fourth spray mode of the drum washing machine in the second embodiment.

List of reference signs:

1, box body; 2, outer tube; 3, inner tube; 4, door body; 5, sealed window mat; 6, drain pump; 7, drain pipe; 8, circulation pump; 9, outlet pipe; 101, valve body; 1011, inlet valve port; 1012, first outlet valve port; 1013, second outlet valve port; 1014, third outlet valve port; 102, valve core; 1021, through hole; Tube; 12, nozzle.

detailed description

It should be understood by those skilled in the art that the embodiments of the present invention are merely used to explain the technical principles of the present invention and are not intended to limit the scope of the present invention. For example, although the components in the drawings are drawn in a proportional relationship, the proportional relationship is not constant, and those skilled in the art can adjust them according to needs to adapt to specific applications, and the adjusted technology. The solution will still fall within the scope of protection of the present invention.

It should also be noted that in the description of the present invention, the terms "installation", "connected", and "connected" are to be understood broadly, and may be, for example, a fixed connection or a The connection is disassembled or connected integrally; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

As shown in FIGS. 1 and 2, the drum washing machine of the present invention mainly comprises a casing 1, an outer cylinder 2, an inner cylinder 3, a door body 4, a sealing window mat 5, a drain pump 6, and a drain pipe 7. The outer cylinder 2 is fixedly disposed in the casing 1, the inner cylinder 3 is rotatably disposed in the outer cylinder 2, and the sealing window mat 5 is disposed between the casing 1 and the outer cylinder 2. The drain pump 6 and the drain pipe 7 are both disposed in the tank 1, and the water inlet of the drain pump 6 is connected to the inner bottom of the outer cylinder 2, the water outlet of the drain pump 6 is connected to one end of the drain pipe 7, and the drain pipe 7 is additionally connected. One end leads to the outside world. The drain pump 6 can discharge the washing water in the outer cylinder 2 through the drain pipe 7.

In addition, those skilled in the art can understand that when each portion of the drain pipe 7 is lower than the inner bottom end of the outer cylinder 2, those skilled in the art can also omit the drain pump 6 and drain the pump 6 as needed. Replace with a shut-off valve. When the drum washing machine needs to drain, the shut-off valve is opened, so that the washing water in the outer cylinder 2 is automatically discharged from the drain pipe 7 by its own gravity.

1 and 2, the front end of the casing 1 (the right side of the casing 1 in FIG. 2) is provided with a tank mouth (not shown), and the front end of the outer cylinder 2 (the right side of the outer cylinder 2 in FIG. 2) The outer cylinder mouth (not shown) is provided, and the front end of the inner cylinder 3 (the right side of the inner cylinder 3 in Fig. 2) is provided with an inner cylinder mouth (not shown). One end of the sealing window mat 5 is sealingly connected to the edge of the tank mouth, and the other end of the sealing window mat 5 is sealingly connected to the edge of the outer cylinder mouth. The door body 4 is pivotally disposed on the casing 1, and the door body can be closed when the door body 4 is closed to prevent the washing water in the outer cylinder 2 from overflowing from the tank body.

1 and 2, the drum washing machine of the present invention further includes a sprinkler system that mainly includes a circulation pump 8, an outlet pipe 9, a control valve 10, eight branch pipes 11, and eight nozzles 12. The circulation pump 8 is preferably arranged in the housing 1 and is fixedly connected to the housing 1 . Alternatively, the person skilled in the art can also fixedly connect the circulation pump 8 to the outer cylinder 1 as needed. The water inlet of the circulation pump 8 is passed to the inside of the outer cylinder 2, and preferably, the water inlet of the circulation pump 8 is connected to the bottom end of the outer cylinder 2 through an inlet pipe (not shown). Alternatively, the person skilled in the art can also connect the inlet pipe to any position of the outer cylinder 2 under the condition that the inlet pipe is located below the liquid level in the outer cylinder 2 as needed. The water outlet of the circulation pump 8 communicates with the water inlet valve port 1011 of the control valve 10 through the outlet pipe 9. Alternatively, those skilled in the art can also omit the outlet pipe 9 as needed to directly connect the water outlet of the circulation pump 8 with the inlet valve port 1011 of the control valve 10.

As shown in FIGS. 2 to 4, eight nozzles 12 are disposed on the seal window mat 5 at equal intervals around the circumference of the outer cylinder 2. Alternatively, the skilled artisan can also provide a plurality of nozzles 12 on the sealing window mat 5 at different intervals as needed. Among them, all the nozzles 12 pass through the sealing window mat 5 and are both sealedly connected with the sealing window mat 5 to prevent the washing water in the outer cylinder 2 from leaking.

Further, those skilled in the art can also arrange eight nozzles 12 at any position near the front end of the outer cylinder 2 as needed, for example, eight nozzles 12 are disposed inside the door body 4, and eight nozzles 12 are disposed at the outer cylinder mouth. At the edge. Further, those skilled in the art can also set the eight nozzles 12 to any other feasible number, such as five, six, nine, etc., as needed.

As shown in Figs. 1 to 3, the water outlet of each of the nozzles 12 is directed to the inner cylinder 3 so that water ejected from the nozzles 12 can fall into the inner cylinder 3 to spray the laundry. Alternatively, a person skilled in the art can also make the nozzle 12 point to the door body 4 under the premise that the plurality of nozzles 12 can spray the washing water into the inner cylinder 3, and then make the washing water by the reflection of the door body 4. The spray enters the inner cylinder 3.

With continued reference to Figures 1 and 2, the control valve 10 is preferably disposed within the housing 1 and is fixedly coupled to the housing 1 (e.g., the inner side wall of the housing 1). Those skilled in the art can also make the control valve 10 fixedly connected to the casing 1 by any feasible connection as needed. For example, a snap-fit structure or a fixed structure is provided on the control valve 10, by which the control valve 10 is fixed to the case 1. Alternatively, the person skilled in the art can also fixedly connect the control valve 10 to the outer cylinder 1 as needed.

As shown in FIGS. 4 and 5a to 5c, in the first embodiment of the present invention, the control valve 10 is a four-way valve including a valve body 101 and a valve body 102 pivotally disposed in the valve body 101. The valve body 101 is provided with a water inlet valve port 1011, a first water outlet valve port 1012, a second water outlet valve port 1013, and a third water outlet valve port 1014. The inlet valve port 1011 is in communication with the outlet pipe 9, and the first outlet valve port 1012, the second outlet valve port 1013, and the third outlet valve port 1014 are connected to a plurality of nozzles 12, respectively. Further, those skilled in the art can also provide the control valve 10 as other multi-way valves as needed, for example, a three-way valve, a five-way valve, a six-way valve, and the like.

As shown in FIG. 4, the eight nozzles 12 are divided into three groups of lower, middle, and upper. The lower group includes three nozzles 12, which are recorded as the first group of nozzles; the middle group includes two nozzles 12, which are recorded as the second group of nozzles; and the upper group includes three nozzles 12, which are recorded as the third group of nozzles. Each of the first set of nozzles 12 is in communication with the first outlet valve port 1012 via a branch pipe 11, respectively. Each of the nozzles 12 of the second group of nozzles is in communication with a second outlet valve port 1013 via a branch pipe 11, and each of the nozzles 12 of the third group of nozzles is in communication with a third outlet valve port 1014 via a branch pipe 11. In addition, those skilled in the art can appropriately adjust the correspondence between the three sets of nozzles and the three outlet valve ports as needed, for example, the first group of nozzles correspond to the third outlet valve port 1014, and the second group of nozzles and the first group The outlet valve port 1012 corresponds to the third group of nozzles corresponding to the second outlet valve port 1013.

As shown in FIGS. 5a to 5c, the cross section of the spool 102 aligned with the first outlet valve port 1012, the second outlet valve port 1013, and the third outlet valve port 1014 is fan-shaped. In other words, the first outlet valve port 1012, the second outlet valve port 1013, and the third outlet valve port 1014 can simultaneously intersect at the same plane, and the spool 102 is fan-shaped after being cut by the plane. Wherein, the pivot axis of the sector coincides with the center of the circle to which the sector belongs.

As shown in FIG. 5a and FIG. 6a, when the spool 102 is rotated to the first switching position shown in FIG. 5a, the inlet valve port 1011 communicates with the first outlet valve port 1012, and the first group of nozzles will circulate the pump 8 pump. The supplied washing water is sprayed into the inner cylinder 3.

As shown in FIG. 5b and FIG. 6b, when the spool 102 is rotated to the second switching position shown in FIG. 5b, the inlet valve port 1011 communicates with the first outlet valve port 1012 and the second outlet valve port 1013, the first group. The nozzle and the second group of nozzles simultaneously spray the wash water pumped by the circulation pump 8 into the inner cylinder 3.

As shown in Figures 5c and 6c, when the spool 102 is rotated to the third switching position shown in Figure 5c, the inlet valve port 1011 and the first outlet valve port 1012, the second outlet valve port 1013 and the third outlet valve The ports 1014 are all connected, and the first group of nozzles, the second group of nozzles, and the third group of nozzles simultaneously spray the washing water pumped by the circulation pump 8 into the inner cylinder 3.

In addition, when the spool 102 is rotated to block the inlet valve port 1011, it is recorded as a fourth switching position, the inlet valve port 1011 and the first outlet valve port 1012, the second outlet valve port 1013 and the third outlet valve port 1014. Not connected.

As shown in FIGS. 7a to 8d, in the second embodiment of the present invention, unlike the first embodiment, the valve body 102 and the first outlet valve port 1012, the second outlet valve port 1013, and the third outlet valve are The port 1014 is aligned in a Y-shaped cross section, and a through hole 1021 is further provided on one branch of the Y-shape. Further, a person skilled in the art can also set the Y-shaped cross section of the spool 102 to a T shape or a delta shape as needed.

As shown in FIG. 7a and FIG. 8a, when the spool 102 is rotated to the first switching position shown in FIG. 7a, the inlet valve port 1011 communicates with the first outlet valve port 1012 through the through hole 1021, and the first group of nozzles will The wash water pumped by the circulation pump 8 is injected into the inner cylinder 3.

As shown in FIG. 7b and FIG. 8b, when the spool 102 is rotated to the second switching position shown in FIG. 7b, the inlet valve port 1011 communicates with the second outlet valve port 1013 through the through hole 1021, and the second group of nozzles will circulate. The wash water pumped by the pump 8 is injected into the inner cylinder 3.

As shown in FIG. 7c and FIG. 8c, when the spool 102 is rotated to the third switching position shown in FIG. 7c, the inlet valve port 1011 communicates with the third outlet valve port 1014 through the through hole 1021, and the third group of nozzles will The wash water pumped by the circulation pump 8 is injected into the inner cylinder 3.

As shown in FIG. 7d and FIG. 8d, when the spool 102 is rotated to the fourth switching position shown in FIG. 7d, the inlet valve port 1011 passes through the notch (not shown) of the Y-shaped structure on the spool 102 and the first The outlet valve port 1012 communicates with the second outlet valve port 1013 and the third outlet valve port 1014 through the through hole 1021, and the first group nozzle, the second group nozzle and the third group nozzle simultaneously pump the pump 8 Water is injected into the inner cylinder 3.

In addition, when the spool 102 is rotated to block the inlet valve port 1011, it is recorded as a fifth switching position, the inlet valve port 1011 and the first outlet valve port 1012, the second outlet valve port 1013 and the third outlet valve port 1014. Not connected.

It should be noted that, in the first embodiment or the second embodiment of the present invention, the control valve 10 is an electromagnetic control valve so that the electromagnetic control valve can be operated by an operation button provided on the casing 1, and thus Change its toggle bit.

It can be understood by those skilled in the art that the solenoid valve 10 in the first embodiment and the second embodiment can be manually operated by the user to change the switching position, or can be operated by the controller on the drum washing machine according to certain instructions. The switching bits are changed regularly.

Further, although not shown in the drawings, in the third embodiment of the present invention, the solenoid valve 10 can also be replaced by a plurality of electromagnetic cutoff valves. Illustratively, it is replaced by three shut-off valves, and the three shut-off valves are respectively connected and control the on and off of the first group of nozzles, the second group of nozzles, and the third group of nozzles. The washing water can be sprayed into the inner cylinder 3 independently of each other between the three sets of nozzles, or the washing water can be sprayed into the inner cylinder 3 in combination with each other. In addition, those skilled in the art can also appropriately adjust the number of electromagnetic shutoff valves as needed, and adjust the number of nozzles 12 controlled by each electromagnetic shutoff valve. For example, eight electromagnetic shut-off valves are provided such that each electromagnetic shut-off valve controls one nozzle 12, respectively.

It will be understood by those skilled in the art that in the above three embodiments of the present invention, the first group of nozzles, the second group of nozzles, and the third group of nozzles can be selectively controlled by the control valve 10 or the shutoff valve to circulate the pump 8 The pumped washing water is sprayed into the inner cylinder 3, and the spray effect of the drum washing machine is optimized, so that the drum washing machine can selectively spray the laundry in the inner cylinder 3 from above, side or below.

Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims

A spray system of a drum washing machine, the drum washing machine comprising a box body, an outer tube and an inner tube which are sequentially arranged from the outside to the inside,

Characterizing in that the spray system comprises a circulation pump, a control valve and a plurality of nozzles;

The water inlet of the circulation pump leads into the outer cylinder, and the water outlet of the circulation pump is respectively connected to the plurality of nozzles through the control valve;

The plurality of nozzles are disposed near a front end of the outer cylinder;

In operation, the circulation pump supplies a wash water pump in the outer cylinder to the control valve, the control valve selectively dispensing wash water to one or more of the plurality of nozzles, and then the nozzle Wash water is sprayed into the inner cylinder.
A sprinkling system for a drum washing machine according to claim 1, wherein said control valve comprises a multi-way valve, said multi-way valve comprising a water inlet valve port and a plurality of water outlet valve ports, said water inlet The valve port is in communication with the water outlet of the circulation pump, and each of the outlet valve ports is connected to one or more of the nozzles.
A sprinkler system for a drum washing machine according to claim 2, wherein said multi-way valve is a four-way valve having a water inlet valve port and three water outlet valve ports, said plurality of nozzles including a first group a nozzle, a second set of nozzles and a third set of nozzles, each of the outlet valve ports being connected to a group of nozzles.
A sprinkler system for a drum washing machine according to claim 3, wherein said four-way valve comprises:

a first switching position for communicating the water outlet of the circulation pump with a set of nozzles;

a second switching position for communicating the water outlet of the circulation pump with two sets of nozzles;

a third switching position for communicating the water outlet of the circulation pump with the three sets of nozzles;

a fourth switching position for disconnecting the water outlet of the circulation pump from the three sets of nozzles.
A shower system for a drum washing machine according to claim 4, wherein a cross section of the spool of the four-way valve aligned with the four valve ports is fan-shaped.
A sprinkler system for a drum washing machine according to claim 3, wherein said four-way valve comprises:

a first switching position for communicating the water outlet of the circulation pump with the first group of nozzles;

a second switching position for communicating the water outlet of the circulation pump with the second group of nozzles;

a third switching position for communicating the water outlet of the circulation pump with the third group of nozzles;

a fourth switching position for connecting the water outlet of the circulation pump with all three sets of nozzles;

a fifth switching position for disconnecting the water outlet of the circulation pump from the three sets of nozzles.
A sprinkling system for a drum washing machine according to claim 6, wherein a spool of said four-way valve is aligned with a four valve port in a Y-shaped cross section, and a branch of said Y-shaped portion is provided Through hole.
The sprinkling system of a drum washing machine according to claim 1, wherein the control valve comprises a plurality of shut-off valves, and each of the inlet valve ports of the shut-off valve is in communication with a water outlet of the circulation pump. The outlet valve port of each of the shutoff valves is connected to one or more of the nozzles.
The shower system of the drum washing machine according to any one of claims 1 to 8, wherein the control valve is an electromagnetic control valve; and/or the plurality of nozzles are wound around a circumference of the outer cylinder Equal spacing settings.
A drum washing machine, characterized in that the drum washing machine comprises the shower system according to any one of claims 1 to 9.