EP4180565A1 - Flushing system, water-conducting domestic appliance and method for conducting fluid - Google Patents

Abstract

A flushing system (1) for a water-bearing household appliance is provided. The flushing-in system is designed so that a fluid flows through it from an upstream end (2) to a downstream end (3) in a main flow direction. The flushing system (1) comprises: a hose main body (4), an outlet portion (5) which is arranged at the downstream end of the hose main body (4) and has an opening (6) for discharging the fluid, the opening (6 ) extends in an outlet plane (8), and a fluid guide geometry (7) which is designed to guide the fluid. The fluid guiding geometry (7) is arranged in the outlet area (5) of the flushing system (1) in such a way that it is located upstream of the outlet plane (8). Furthermore, a water-carrying household appliance (100) and a method for conducting fluid are provided.

Description

The invention relates to a flushing system for a water-bearing household appliance, a water-bearing household appliance and a method for conducting fluid.

The use of a flushing system in water-bearing household appliances such as a washing machine or a washer-dryer is well known. A known flushing system typically represents part of a water supply system which is designed to direct the media conditions present outside the water-bearing household appliance, in particular the water line pressure and the volume flow, into a treatment chamber of the water-bearing household appliance in an adjusted or unadjusted manner. For this purpose, the flushing system can supply a fluid (water or a mixture of water and other substances) to the treatment chamber.

In the case of laundry treatment devices, the treatment space can be a tub, for example. A perforated drum, which can accommodate textiles to be treated, can be rotatably mounted in the tub. Depending on a functionality that the laundry treatment appliance is intended to perform, it may be necessary to direct the fluid either directly onto the drum in order to directly wet the textiles accommodated in the drum, or to direct the fluid to the tub so that the textiles are not directly soaked. In the latter case, the fluid can be fed to a heating element in the treatment room, for example, in order to be evaporated there. These two functionalities are in conflict with one another, which is why it often happens that fluid cannot be routed into the treatment room in accordance with the respective functionality. In a laundry treatment device, for example, it can therefore happen that textiles received in the drum are moistened directly, although this is actually intended to be prevented.

It is therefore an object of the present invention to provide a flushing-in system for a water-conducting household appliance, a water-conducting household appliance and a method for conducting fluid, in which a fluid also has a number of functionalities of the water-bearing household appliance can be supplied to a tub in a targeted manner.

This object is achieved by a flushing system with the features of claim 1, a water-bearing household appliance with the features of claim 9 and a method for conducting fluid into a tub of a water-bearing household appliance with the features of claim 11.

According to one aspect of the present invention, a flushing system for a water-bearing household appliance is provided, wherein the flushing system is designed to be flowed through by a fluid from an upstream end to a downstream end in a main flow direction, the flushing system comprising: a hose main body, an outlet area , which is arranged at the downstream end of the hose main body and has an opening for discharging the fluid, the opening extending in an outlet plane, and a fluid guide geometry which is designed to guide the fluid, characterized in that the fluid guide geometry, is arranged in the outlet area of the induction system so that it is upstream of the outlet plane.

The water-bearing domestic appliance can be a laundry treatment appliance or a washer-dryer, for example. It is also conceivable that the water-bearing household appliance is a dishwasher. The water-bearing household appliance can have a treatment chamber to which a fluid (eg water or a mixture of water and other substances) is to be supplied. Furthermore, the water-bearing domestic appliance can have at least two different functionalities, in which the fluid is to be supplied to the treatment room in different ways. In particular, the at least two functionalities can differ with regard to a volume flow of fluid to be supplied. In the case of the first functionality, for example, it may be desirable for the fluid to be introduced into the treatment space with a high volume flow and a high flow rate (ie with a high kinetic energy). In contrast, with the second functionality, it may be desirable for the fluid to be supplied to the treatment chamber with a lower volume flow and lower flow rate (ie with low kinetic energy). Compared to the known prior art, the present invention offers the advantage that by the inventive Arrangement of Fluidleitgeometrie in the flushing system, both the first functionality and the second functionality is efficiently enabled.

It can thus be ensured that multiple functionalities of the water-bearing household appliance can be implemented with only simple structural changes to the water-bearing household appliance (ie compared to a household appliance which does not have the functionalities). In other words, by providing only the flushing system according to one embodiment of the present invention, it can be ensured that multiple functionalities can be performed without any problems. This offers the advantage that existing water-bearing household appliances can be modified easily and cost-effectively.

The flushing system can be a tubular element that is designed to transport a fluid. In other words, the flushing-in system can be designed to conduct and/or guide the fluid. The induction system can have a closed cross-section through the center of which the main flow direction can run. In other words, the main flow direction can follow the general course of the induction system. The flushing system can have a curved course, so that the flushing system can even be installed in a confined space. Furthermore, the flushing system can be easily adapted to different installation locations. The flushing system can include a siphon designed to hold back a certain amount of fluid and thus block the outflow cross-section for gases and/or odors. It can thus be prevented that gases and/or odors are discharged from the treatment room through the flushing system. The induction system may have an upstream end and a downstream end with respect to the direction of flow of fluid through the induction system. In other words, the fluid can flow through the induction system from the upstream end to the downstream end. The main flow direction may extend from the upstream end to the downstream end. The upstream end may be a cross-section of the induction system on its inlet side and the downstream end may be a cross-section of the induction system on its outlet side. At the upstream end, the flushing-in system can have a connection with which the flushing-in system can be connected, for example, to a flushing-in bowl complex of a laundry treatment appliance and/or a water supply system of a water-bearing household appliance can be connected. The downstream end of the induction system may attach the induction system to a treatment room. In other words, the downstream end of the induction system may be attached or attachable to a treatment room. In the case of a laundry treatment appliance, the treatment space can comprise, for example, a laundry drum and a tub. An outer boundary of the treatment room can be defined by the tub.

The fluid can be a mixture of water and other substances. However, the fluid can also just be water. The other substances can be, for example, laundry treatment agents such as detergents, fabric softeners, fragrances, impregnating agents and the like.

The hose main body may extend between the upstream end and the downstream end of the induction system and form part of the induction system. More specifically, the hose main body can connect the siphon provided in the induction system to the outlet portion of the induction system. The hose main body can be formed from a flexible material, so that the flushing system can be laid or provided in a flexible and variable manner. Furthermore, elasticity of the hose main body can provide the advantage that the dispensing system can connect a fixed system (e.g. a dispensing bowl complex) to a moving or oscillating system (e.g. an oscillating system of a laundry treatment appliance) without being damaged itself. The elasticity can be provided, for example, by a choice of material and/or by a geometric configuration of the hose main body. Thus, the hose main body can be formed of rubber. Further, the hose main body may include a bellows portion capable of accommodating vibration (i.e., changes in length of the induction system) without causing the induction system to fail.

The outlet area can designate a part of the induction system which is provided at the downstream end with respect to the main flow direction of the fluid on the induction system. The outlet section can connect directly to the hose main body. The outlet area may have some extension from the downstream end of the induction system towards the upstream end of the induction system. The most downstream cross-section of the induction system can be in the outlet area be arranged. In other words, this most downstream cross-section can be the opening of the induction system, from which the fluid that has passed through the induction system can be discharged therefrom. The opening may be in the outlet plane, which may be substantially orthogonal to the main flow direction of the fluid. The outlet plane can also be a curved or curved plane. The outlet area can thus be optimally adapted to the shape of a treatment room. A leak-free transport of the fluid from the flushing system into a treatment room is thus possible. In particular, it is thus possible to connect the flushing system to a treatment room without adapter pieces or the like. Preferably, the outlet area can be made of an elastically deformable material, so that the outlet area can simultaneously provide a seal to a treatment room.

The fluid directing geometry can be a structural element that can direct a fluid flowing through the induction system. In other words, the fluid guide geometry can be provided within the flow cross section of the flushing system. Conduction can be understood in such a way that flow properties of the fluid, such as a flow speed and/or a flow direction, can be influenced (i.e. changed) by the fluid conduction geometry. The fluid guide geometry can be provided in the flushing system in such a way that the fluid flows at least partially over it. It can thus be ensured that the fluid can be conducted in an efficient manner. The fluid routing geometry may cause the fluid transported or directed through the induction system to have a different direction and/or flow rate at the outlet plane compared to when no fluid routing geometry is provided in the induction system. The fluid guiding geometry in the induction system can thus ensure that the fluid flows out of the induction system in a predefined manner, without the need for further components and/or devices outside of the induction system. Thus, by simply providing the flushing-in system, the manner in which fluid is supplied to a treatment chamber can be influenced.

The fluid geometry can be arranged in such a way that it is not arranged directly in or on the outlet plane, but is shifted in the direction of the upstream end of the flushing-in system. In other words, the fluid geometry of the opening be spaced apart from the induction system. The upstream displacement of the fluid guide geometry has the effect that the fluid can be guided before it reaches the outlet level in such a way that the fluid is already influenced (for example, already deflected) when it reaches the outlet level. A greater deflection of the fluid can thus be provided at the point of the outlet level, so that the fluid is already deflected in the desired direction and/or has a desired flow rate directly downstream of the outlet level (ie outside the induction system). The fluid guide geometry can be designed in such a way that it diverts fluid up to a specific volume flow. If, on the other hand, the volume flow of the fluid is above this specific volume flow, the fluid can flow out through the flushing system without being significantly influenced by the geometry of the fluid conductor. In other words, a first functionality of the water-bearing household appliance can transport fluid of, for example, approximately 10 l per minute, whereas a second functionality of the water-bearing household appliance can transport fluid through the flushing system of only approximately 0.5 l per minute. The fluid guide geometry can be designed in such a way that, with the first functionality, it does not significantly affect the outflow of the larger volume flow, whereas with the second functionality, the fluid can be guided through the fluid guide geometry. This can be realized in that the fluid guide geometry is completely overflowed in the first functionality. In some cases, the first functionality in the induction system may have a pressure drain. Thus, the influence of the fluid guide geometry on the flow can be small. In contrast, in the case of the second functionality, there can be a free level outflow in the flushing system, so that the flow of the fluid is significantly influenced by the fluid guide geometry. In other words, with the first functionality, more fluid can be conducted through the flushing system than with the second. This offers the advantage that the flushing system can be used efficiently for both functionalities without having to compromise on the respective functionality.

By providing the fluid guide geometry, flow properties of the fluid in the area of the outlet level can therefore be influenced as a function of a volume flow of the fluid. In other words, the fluid can be discharged from the flushing system in a different way in the case of different volume flows. Thus, the flushing system can be particularly useful when, for example, providing different Functionalities in a water-bearing household appliance the fluid should have other flow properties (such as flow speed and/or flow direction) after flowing through the outlet level.

The fluid guide geometry preferably has an area that can be overflowed, which is arranged essentially orthogonally to the main direction of flow of the fluid through the flushing system. The fluid guide geometry can have a lip over which a fluid can flow in the operating state. The lip can define a kind of drip edge from which, during operation, the fluid is no longer in contact with the flushing system. In other words, after passing the fluid guide geometry, in particular the lip, the fluid can be discharged in free fall, driven by the flow velocity and gravity. In other words, after passing through the fluid guide geometry, the fluid can flow off in a fluid jet. Because the fluid guide geometry can be arranged essentially orthogonally to the main flow direction of the fluid, it can be ensured that all of the fluid discharged through the flushing system is discharged via the fluid guide geometry and can thus be guided through it. Furthermore, the lip or drip edge can have the same distance from the outlet plane along its extent. Thus, the flow properties of the fluid can be uniformly influenced. Substantially orthogonal can mean that the fluid guide geometry is arranged such that an angle between the main flow direction and the fluid guide geometry is 90° plus minus 5°. In this area it can be ensured that the fluid is deflected or influenced in such a way that it has the desired flow direction and/or flow speed in the outlet plane.

Alternatively, the tear-off edge can also be curved or inclined, so that only part of the area that can be overflowed or no section at all of the area that can be overflowed is orthogonal to the main flow direction of the fluid. In this case, too, the fluid guide geometry can be arranged upstream of the outlet plane. However, not every part of the fluid guiding geometry, in particular the stall edge, can have the same distance to the outlet plane. In other words, the distance between the tear-off edge and the outlet plane can vary along the extension direction of the tear-off edge. Thus, the fluid can be guided in a targeted manner. This is advantageous, for example, if fluid is to be introduced into the treatment chamber, distributed in a specific manner along the main flow direction.

A tear-off edge of the fluid guide geometry is preferably 0.2 mm to 5 mm, preferably 1 mm to 4 mm, more preferably 2.5 mm to 3 mm, away from the outlet plane. The tear-off edge can be the lip and/or the drip edge of the fluid guide geometry. It has been found that the spacing of the fluid guide geometry from 0.2 mm to 5 mm is particularly suitable when a fluid drained through the flushing system is to be fed to a specific point in the treatment space. In other words, the flow properties of the fluid can be reliably influenced in this area. In the distance range of 1 mm to 4 mm, it has been shown that the fluid can still be guided reliably even if the flushing system implements a deflection of the main flow of the fluid directly in front of the outlet area (i.e., for example in the main hose body). In other words, due to the fluid guide geometry, the fluid can have a specific direction that deviates from the main flow direction in the flushing system when the fluid flows into the outlet plane. Thus, in the distance range of 1 mm to 4 mm, a satisfactory conduction of the fluid can also be realized, for example by influencing the direction and/or the flow rate of the fluid in such a way that it corresponds to a desired flow rate and/or flow direction of the fluid in the outlet level . In the distance range of the tear-off edge of the fluid guide geometry of 2.5 mm to 3 mm has proven particularly advantageous when used in laundry treatment devices. In this case, it can happen that the fluid that is discharged from the flushing system has to be deflected relatively sharply, for example to prevent fluid from hitting a drum provided in the treatment room. This clearance range allows the fluid to be satisfactorily introduced into the treatment space without coming into contact with the drum. Thus, the clearance range of 2.5 mm to 3 mm can cause the fluid between a drum provided in the treatment room and an inner wall of the treatment room to be discharged without hitting the drum.

An outflow cross section available to the fluid at the location of the fluid guide geometry is preferably at least 10%, more preferably at least 20%, smaller than the outflow cross section at the location of the opening. The outflow cross-section at the point of the opening can be in the outlet plane. In other words, the outlet area can have at least two different outflow cross sections. A first drain cross-section at the location of the fluid guide geometry and a second outflow cross-section at the location of the opening. The first outflow cross section can be smaller than the second outflow cross section. It can thus be enforced that the fluid transported through the flushing-in system has to flow off via the fluid-guiding geometry. The fluid can thus be conducted efficiently through the fluid guide geometry and, for example, a flow rate of the fluid can be reduced. Furthermore, the direction of flow of the fluid can be determined by reducing the outflow cross section, similar to how a nozzle works. The percentage of reduction refers to the fully open flow area in the outlet plane. In other words, the discharge cross-section at the point of opening of the outlet level is 100% open (in other words reduced by 0%). Furthermore, the reduction in the outflow cross section can cause the fluid to flow evenly over the fluid guide geometry. A uniform flow depth on and/or at the fluid guide geometry can thus be ensured, so that all of the fluid that is transported through the flushing system can be guided uniformly through the fluid guide geometry. In other words, a possible formation of waves on the fluid guide geometry can be avoided and fluid can thus be prevented from escaping from the flushing system in an undesired manner.

The fluid guide geometry preferably has at least one guide lip, which extends essentially along the main flow direction and is designed to guide the fluid. The at least one guiding lip can, for example, be orthogonal to the separation edge of the fluid guiding geometry. The guiding lip can be designed to equalize a flow of the fluid on the fluid guiding geometry. This is particularly advantageous when the induction system or the main flow direction of the induction system makes an arc and the fluid thus impinges on the fluid guide geometry with a swirling flow. With the guide lip, it can be ensured that the fluid emerges evenly from the outlet level of the flushing system. This can cause the fluid to be supplied to the treatment room in a targeted and uniform manner.

The outlet area preferably has an impact surface arranged between the outlet plane and the fluid guide geometry, which is designed to reduce a kinetic energy of the fluid that has passed through the fluid geometry. In other words, the baffle can be arranged in the flushing system that the fluid during operation of the induction system, which has passed the fluid guide geometry, impinges directly on the impingement surface. Thus, the fluid guiding geometry can be configured to direct the fluid onto the baffle. The impact surface can represent the wall of the outlet area, for example. The wall can be an inner surface of the outlet area, for example. In other words, the fluid can first be directed onto the baffle surface by the fluid guiding geometry and exit the flushing system from the baffle surface through the opening in the outlet plane. In this way, kinetic energy that is built up, in particular when passing through the main hose body, can be at least partially dissipated before the fluid leaves the flushing system. This allows the fluid to be guided in a particularly precise and targeted manner when it emerges from the opening in the outlet plane. This is particularly advantageous if, after the fluid has exited the flushing system, there is only little space available for the fluid to drain and the fluid is to be drained off in a targeted manner in the space available. Furthermore, a radius of a jet arc, which the fluid can describe after leaving the induction system, can thus be reduced.

The outlet area preferably has a receiving area which is designed to receive a flange of a treatment room. In other words, the flushing-in system with the outlet area can be placed on a flange of a treatment space (for example a tub). Thus, the flange can contact the inner peripheral surface of the outlet portion. In order to attach the flushing system to the treatment space, the flushing system can be fixed to the treatment space with a clamp or the like on the outside via the outlet area (i.e. on the outer surface of the outlet area). In this case, the impact surface can be realized by the flange. The flushing system can thus be designed to be removable from a treatment room, so that the flushing system can easily be inserted into existing water-bearing household appliances.

The fluid guide geometry preferably has an area that can be overflowed on its downstream side, wherein the area that can be overflowed can have a radius that is designed to guide the fluid along the area that can be overflowed during operation of the flushing system. The downstream portion of the fluid guide geometry may face the outlet plane. In other words, the downstream portion of the fluid guide geometry can be the drip edge or the lip of the fluid guide geometry.

The fluid can drip off the overflowable area (i.e. leave the fluid guide geometry) and go into free fall. By providing a radius on the fluid guide geometry, the fluid can be directed in a desired direction prior to exiting the fluid guide geometry. In this case, the radius can be selected in such a way that there is no boundary layer separation or stalling of the fluid. For example, the radius can be selected such that the fluid is deflected by no more than 6° from its direction of flow in front of the fluid guide geometry. Thereby it can be ensured that the fluid follows the radius and can be deflected accordingly. At the point of the fluid guide geometry at which the fluid should detach from the fluid guide geometry, the radius can be abruptly reduced or a recess can be provided, so that the fluid detaches from the fluid guide geometry. It is thus possible to control even more precisely the direction in which the fluid is to be discharged from the flushing system.

According to a further aspect of the present invention, a water-bearing household appliance is provided, comprising: a flushing system according to the above embodiment, a substantially cylindrical tub with a connecting flange to which the flushing system is connected or can be connected, and a drum for receiving laundry to be treated, which is rotatably arranged in the tub, the flushing system being connected or connectable in the upper half of the tub. The water-bearing household appliance can have a treatment agent chamber (eg a flushing bowl) for receiving a treatment agent. Furthermore, the water-bearing household appliance can have a water supply connection which can be connected or is connected to an external water source and which can supply the water to the treatment agent chamber. From there, the water or a mixture of treatment agent and water (ie a fluid) can be fed to the flushing system. The fluid can then be supplied to the tub by the flushing system. When the water-carrying household appliance is functional (for example a washing operation), media conditions present on the outside of the household appliance (in particular water pressure and volume flow) can be passed on into the household appliance almost unhindered. A valve block can also be provided to control the water supply to the household appliance. The fluid can get into the actual process space (the oscillating system) through the subsequent water-carrying equipment (inlet hose, flushing bowl, filling hose, etc.). The process space can be formed by the tub and the laundry drum.

A relatively high volume flow (for example 10 l per minute) can thus make it possible for the laundry accommodated in the drum to be quickly soaked through and for a sufficiently high water level to be quickly provided in the tub. It can thus be ensured that a heating device is sufficiently covered with water so that no damage occurs when it is heated up. Thus, a quick and effective cleaning of the textiles can be provided. The above corresponds to a functionality of the water-bearing household appliance. A further functionality of the water-bearing household appliance can be a steaming function, in which water is supplied to the tub, which water is then evaporated by a heating device. The steam is to be supplied to the textiles in the drum in order to treat them. With the steaming functionality, however, it is important that no fluid impinges directly on the drum and thus also not on the laundry. In contrast, it is necessary for the fluid in an intermediate space between the inner wall of the tub and the outer surface of the drum to be discharged to the heating element. The distance between the inner wall of the tub and the outer surface of the drum can be approximately 8 mm, for example. The flushing system provided allows the fluid to be reliably drained away in this intermediate space, so that it is avoided that the laundry in the drum is directly moistened. In this way, it can be avoided that the laundry has water stains. The flushing system can be connected in the upper half of the tub. Reliable wetting of the laundry accommodated in the drum can thus be achieved during the washing functionality. The flushing system is preferably connected to the tub in such a way that a center point of the opening of the flushing system is at an angular distance of 20° to 45° from a horizontal line running through the center point of the tub. Both functionalities can thus be efficiently provided with the aid of the flushing system.

Preferably, the connecting flange of the tub has an impact surface that is designed to reduce a kinetic energy of the fluid that has passed the fluid guide geometry. The impact surface of the connecting flange can be designed in accordance with the impact surface of the outlet area of the flushing system.

According to a further aspect of the present invention, a method for feeding fluid into a tub of a water-bearing household appliance is provided, the method comprising: feeding fluid through a flushing system according to one of the above configurations, and routing the fluid via the fluid guide geometry, so that the fluid is routed to an inner wall of the tub to close there. The flushing-in system can thus cause the fluid to reach the inner surface of the treatment space after leaving the flushing-in system. Thus, the inner surface of the treatment space can be referred to as a target for the fluid in the treatment space. From the inner surface of the treatment space, the fluid can then, driven by gravity, reach the lowest point of the treatment space, at which, for example, a heating device is arranged. The heater may cause the fluid to vaporize.

According to a further aspect of the present invention, use of the above flushing system in a water-bearing household appliance is provided. In particular, the water-carrying household appliance is a washing machine or a washer-dryer.

The advantages and effects that have been mentioned in connection with the device also apply analogously to the method and vice versa. Individual features can be combined with other features or other embodiments and form new embodiments. The advantages and effects of the features then also apply to the new embodiments.

The invention is described in detail below on the basis of embodiments with reference to the attached figures.

Fig. 1

eine schematische Ansicht eines Einspülsystems gemäß einer Ausführungsform der vorliegenden Erfindung,

Fig. 2

eine schematische und perspektivische Ansicht eines Teils eines Einspülsystems gemäß einer weiteren Ausführungsform der vorliegenden Erfindung,

Fig. 3

einen Querschnitt eines Teils eines Einspülsystems gemäß einer Ausführungsform der vorliegenden Erfindung, und

Fig. 4

eine schematische und perspektivische Ansicht eines wasserführenden Haushaltsgeräts gemäß einer Ausführungsform der vorliegenden Erfindung.

In the figures shows:

1

a schematic view of a flushing system according to an embodiment of the present invention,

2

a schematic and perspective view of part of a flushing system according to a further embodiment of the present invention,

3

a cross-section of part of a flushing system according to an embodiment of the present invention, and

4

a schematic and perspective view of a water-bearing household appliance according to an embodiment of the present invention.

figure 1 12 is a schematic side view of a flushing system 1 according to an embodiment of the present invention. The flushing system 1 is made up of a hose main body 4 , an outlet area 5 and a siphon 13 . A fluid can flow through the induction system 1 from an upstream end 2 to a downstream end 3 . In the order from the upstream end 2, the fluid first flows through the siphon 13, then the hose main body 4 and then the outlet area 5. The flushing system 1 is arranged or can be arranged in a water-bearing household appliance 100 between a water supply and a treatment room 101. The fluid can flow through a flushing system 1 in a main flow direction from the upstream end 2 to the downstream end 3 . The outlet area 5, which is arranged at the downstream end 3 of the induction system 1, has an opening 6 through which the fluid can leave the induction system 1. The opening 6 is in an outlet plane 8. Furthermore, the flushing system 1 has a fluid-guiding geometry 7, which is designed to guide the fluid. In the present embodiment, the fluid guide geometry 7 is a screen-like structure that blocks part of the outflow cross section through the flushing system 1 . In other words, fluid that flows in the main flow direction from the upstream end 2 to the downstream end 3 of the induction system 1 must flow over the fluid guide geometry 7 . In this case, the fluid can be guided through the fluid guide geometry 7 . In the present embodiment, the fluid guide geometry has two incisions through which the fluid can pass. The fluid flow can thus be concentrated downstream of the fluid guide geometry 7 . Furthermore, the fluid guide geometry 7 is arranged upstream of the outlet level 8 in the flushing system 1 . The fluid guide geometry 7 is thus at a distance from the opening 6 or the outlet plane 8 . If the fluid flows over the fluid guide geometry 7, it describes an arc shape (ie a jet arc). In other words, the shape of the fluid flowing over the fluid guide geometry 7 can be described as a jet arc. In other words, when the fluid flows over an object in the free-level outflow, it cannot directly change the flow direction (e.g. from a horizontal flow direction to a vertical flow direction), but the change in direction is described successively, ie in the form of a jet arc. Due to the fact that the fluid guide geometry 7 is arranged upstream of the outlet level 8, the jet arc can be formed relative to the induction system 1 in such a way that the fluid has already assumed the vertical flow direction immediately downstream of the outlet level 8 or is at least already strongly deflected. It can thus be ensured that the fluid has the desired direction of flow immediately after leaving the flushing system 1 .

In summary, arranging the fluid guide geometry 7 upstream of the outlet plane 8 can cause the jet arc that the fluid describes when leaving the fluid guide geometry to be shifted by the amount of the offset of the fluid guide geometry relative to the outlet plane 8 . In addition, with a sufficiently large offset of the fluid guide geometry 7 relative to the outlet plane 8 , the jet arc of the fluid can be arranged such that the fluid is guided onto an impact surface 12 of the flushing system 1 after leaving the fluid guide geometry 7 . As a result, the flow speed of the fluid can be reduced and a kinetic energy of the fluid can be reduced by the resulting turbulence. The fluid can thus leave the flushing-in system 1 at a lower flow rate and form a very flat jet arc when draining from the impact surface 12 . It can thus also be brought about that the fluid has changed its direction immediately downstream of the outlet plane 8 of the flushing system 1 . For example, the fluid can be directed to an inner surface of the tub in order to drain off there.

Furthermore, the induction system 1 has a bellows area 14 which is designed to compensate for changes in length between the upstream end 2 and the downstream end 3 of the induction system 1 . Thus, the dispensing system 1 can be attached or attachable with its upstream end 2 to a stationary element (e.g. a dispensing bowl) and with its downstream end 3 attached or attachable to an oscillating system (e.g. a tub).

figure 2 Fig. 12 is a schematic and perspective view of part of a flushing system 1 according to another embodiment of the present invention. The flushing system 1 of the present embodiment is similar to that in FIG figure 1 illustrated flushing system 1 with the difference that the Fluidleitgeometrie 7 has a different configuration. In the present embodiment, the fluid guide geometry 7 does not have an orifice-like structure Structure, but is realized by an overflow area with guide lips 11 extending in the direction of flow. The fluid guide geometry 7 also has an overflowable area 9 over which the fluid flows. Furthermore, the fluid guiding geometry has a tear-off edge 10 from which the fluid drips. In other words, the fluid leaves the fluid guide geometry 7 after passing the tear-off edge 10. The tear-off edge 10 can be part of the area 9 that can be overflown. The tear-off edge 10 can define the most downstream point of the area 9 that can be overflown. In the present embodiment, too, the fluid guide geometry 7 is at a distance from the outlet plane 8 in the direction of the upstream end 2 of the flushing system 1 . To put it more precisely, the tear-off edge 10 is at a distance from the outlet plane 8 . Thus, the same effects as in connection with the in figure 1 illustrated embodiment can be achieved.

Furthermore, in figure 2 a receiving area 13 is shown, with which the flushing system 1 can be attached to a flange of a treatment chamber 101 . The receiving area 13 is an inner surface of the outlet area 5.

figure 3 is a schematic cross-section of part of a flushing system according to FIG figure 2 illustrated embodiment. Furthermore, the flushing-in system 1 is attached with its receiving area 13 to a treatment room 101 . In figure 3 the offset between the downstream end of the fluid guide geometry 7 and the outlet plane 8 can be seen. The fluid can thus be reliably directed to an inner circumference of the treatment chamber 101 after leaving the fluid guiding geometry 7 and discharged there. In the present embodiment, an impact surface 103 can be formed by the treatment space 101 . In other words, the treatment chamber 101 can have its own impact surface 103, which the fluid impinges on after leaving the fluid guide geometry 7 . The impact surface 103 can be formed by the inner circumference of a flange of the treatment space 101 .

According to a further embodiment that is not shown, the flushing system 1 has an impact surface 12 on which the fluid that has passed the fluid guide geometry 7 impinges even when the flushing system 1 is attached to a treatment chamber 101 . In addition, the fluid that has hit the impact surface 12 of the flushing system 1 can then hit the impact surface 103 of the treatment chamber 101 . Through this an even more reliable reduction of the kinetic energy of the fluid can be achieved, whereby the fluid can be reliably deflected in a desired direction.

figure 4 12 is a perspective and schematic view of a laundry treatment appliance 100 as an example of a water-using domestic appliance. The laundry treatment appliance 100 has a drum 102 which is rotatably mounted in the tub 101 . A flushing-in system 1 is arranged in the laundry treatment appliance 100 . The laundry treatment appliance 100 has a functionality for washing textiles accommodated in the drum 102 . In addition, the laundry treatment appliance 100 has the functionality of steaming the laundry. In terms of the washing functionality, the water flow within the laundry treatment appliance 100 is designed in such a way that at least two valves, one each for the pre-wash and main wash, are provided, which allow the media conditions (water line pressure, volume flow, etc.) present on the laundry treatment appliance 100 from the outside to be approximately unimpeded in forward the inside of the laundry treatment appliance when the activated washing program of the washing functionality provides it. The water or fluid enters the actual process space, the oscillating system, more precisely the tub and the laundry drum via the water-carrying devices (inlet hoses, flushing bowl, flushing hose) that follow the valves. The relatively high volume flow of the water or fluid conveyed in this way (approx. 10 l per minute), in conjunction with the geometric design of the components involved, enables the laundry in the drum 102 to be quickly moistened and a sufficiently high water level in a heating compartment of the tub. This results in quick and effective cleaning of the textiles. The functionality of laundry steaming is intended to provide the user with the possibility of preparing clean, dry clothing for easier ironing by means of a suitable steam treatment. This can be achieved by providing a targeted, slight and uniform moistening of the textiles in the drum 102 by steaming, with a simultaneous drum movement. This moistening target is therefore in contradiction to the above-described washing functionality of the water-conducting household appliance 100. To be more precise, the aim of the washing functionality is rapid moistening of the laundry to saturation. The degree of moistening for a noticeable reduction in the subsequent ironing effort is approx. 3% to 13% water content (percentage by mass compared to dry textiles), in particular approx. 6% till 9 %. A water content of 2.5% to 5% has proven to be particularly advantageous, at which even heavily wrinkled textiles can be ironed very easily. Along with the moisture input, the temperature in the textile is advantageously raised to 30° to 60°, in particular to 40° to 50°. In this way it can be achieved that the dry, more or less wrinkled fibers of the textile become soft and supple. Subsequent ironing is therefore less time-consuming and the result is better in less time. For some textiles of a corresponding quality (especially easy-iron shirts), the crease reduction from this treatment is sufficient, so that the shirt can be worn immediately after drying on a hanger without ironing.

By providing the flushing system 1 in the water-bearing household appliance 100, both functionalities can be provided without major structural changes. more precisely, the fluid can flow into the flushing system 1 after flowing through the flushing bowl complex. This leaves the fluid and runs into the treatment room (into the tub 101). If the fluid is passed through the prewash or main wash valve with a volume flow of approx. 10 l per minute, it leaves the induction system 1 at a high flow rate and hits the perforated drum 102, enters the interior of the drum 102 through the perforations and moistens the textiles directly there. Excess fluid runs out of the drum, driven by gravity, down into the tub and into a heating device provided there.

In the case of the steaming functionality, the dispensing system 1 is supplied with a lower volume flow of fluid, approximately 0.5 l per minute, from the dispensing bowl complex. Due to the water conduction geometry 7 described above, the lower volume flow prevents the water from reaching the drum 102 directly and thus directly moistening the dry laundry located therein. The distance between the outlet level 8 and the outer circumference of the drum 102 is approximately 8 mm. Due to the fluid guide geometry 7 in the outlet area 5 of the flushing system 1, the fluid is diverted in such a way that it enters the space between the inner surface of the tub 101 and the outer surface of the drum 102 and is drained off there. The fluid discharged in this way can be conducted to the lowest point of the tub 101 without coming into contact with the laundry in the drum 102 and fed there, for example, to a heating device in order to be evaporated. Best results are obtained with embodiments achieved in which the water guiding geometry 7 is offset in a range of 3 mm to 5 mm from the outlet plane 8 in the direction of the upstream end 2 of the flushing system 1.

It is thus possible to reliably prevent water stains from forming on the laundry when the water-bearing domestic appliance uses a steaming function. Furthermore, by providing the flushing-in system 1, a reliable steaming function can be implemented with only very minor changes to the water-conducting household appliance.

Reference List

1

flushing system

2

upstream end

3

downstream end

4

hose main body

5

outlet area

6

opening

7

fluid guide geometry

8th

outlet level

9

overflowable area

10

tear-off edge

11

guiding lip

12

baffle

13

recording area

14

bellows area

100

water-bearing household appliance

101

tub

102

drum

103

baffle

Claims (11)

Flushing-in system (1) for a water-conducting household appliance, wherein the flushing-in system (1) is designed so that a fluid flows through it from an upstream end (2) to a downstream end (3) in a main flow direction, the flushing-in system (1) comprising : a hose main body (4), an outlet portion (5) located at the downstream end of the hose main body (4) and having an opening (6) for discharging the fluid, the opening (6) extending in an outlet plane (8), and a fluid guide geometry (7) designed to guide the fluid, characterized in that the fluid guide geometry (7) is arranged in the outlet area (5) of the flushing system (1) in such a way that it is located upstream of the outlet plane (8). Induction system (1) according to claim 1, wherein the fluid guiding geometry (7) has an overflowable region (9) which is arranged essentially orthogonally to the main flow direction of the fluid through the induction system (1). Flush-in system (1) according to one of the preceding claims, wherein a tear-off edge (10) of the fluid guide geometry (7) is 0.2 mm to 5 mm, preferably 1 mm to 4 mm, more preferably 2.5 mm to 3 mm, from the outlet plane ( 8) is removed. Flushing system (1) according to one of the preceding claims, wherein an outflow cross section available to the fluid at the location of the fluid guide geometry (7) is at least 10%, more preferably at least 20%, smaller than the outflow cross section at the location of the opening (6 ). Flushing system (1) according to one of the preceding claims, wherein the fluid guiding geometry (7) has at least one guiding lip (11) which extends essentially along the main flow direction and is designed to guide the fluid. Flushing system (1) according to one of the preceding claims, wherein the outlet area (5) has an impact surface (12) arranged between the outlet plane (8) and the fluid guide geometry (7), which is designed to have a kinetic energy of the fluid that the fluid guide geometry (7) has happened to reduce. The flushing system (1) according to any one of the preceding claims, wherein the outlet area (5) has a receiving area (13) which is designed to receive a flange of a treatment space (101). Induction system (1) according to one of the preceding claims, wherein the fluid guide geometry (7) has an area (9) that can be flown over on its downstream side, the area (9) that can be flown over having a radius that is designed to during operation of the induction system ( 1) to guide the fluid along the overflowable area (9). Water-bearing domestic appliance (100), comprising: a flushing system (1) according to one of the preceding claims, a substantially cylindrical tub (101) with a connecting flange to which the flushing system (1) is connected or can be connected, and a drum (102) for receiving laundry to be treated, which is rotatably arranged in the tub (101), wherein the flushing-in system (1) is connected or can be connected in the upper half of the tub (101). Water-bearing household appliance (100) according to claim 9, wherein the connection flange of the tub has an impact surface (103) which is designed to reduce a kinetic energy of the fluid which has passed the fluid guide geometry (7). Method for feeding fluid into a tub (101) of a water-bearing household appliance (100), the method comprising: Supplying fluid through a flushing system (1) according to any one of claims 1 to 8, and Guiding the fluid over the Fluidleitgeometrie (7), so that the fluid is directed to an inner wall of the tub (101) to drain there.

Images