WO2017194525A1

WO2017194525A1 - Fluidic component

Info

Publication number: WO2017194525A1
Application number: PCT/EP2017/061030
Authority: WO
Inventors: Bernhard BOBUSCH; Oliver KRÜGER; Jens WINTERING
Original assignee: Technische Universität Berlin
Priority date: 2016-05-13
Filing date: 2017-05-09
Publication date: 2017-11-16
Also published as: DE102016208344A1

Abstract

The invention relates to a fluidic component (1) with a front wall (12) and a rear wall (13), which extend substantially parallel to a main plane of extent of the fluidic component (1). Arranged between the front wall (12) and the rear wall (13) is a flow chamber (10) through which a fluid stream (2) can flow which enters the flow chamber (10) through an inlet opening (101) of the flow chamber (10) and emerges from the flow chamber (10) through an outlet opening (102) of the flow chamber (10). The direction of flow of the fluid stream (2) is substantially parallel to the main plane of extent. The fluidic component (1) is characterized in that the front wall (12) and/or the rear wall (13) have, in the region of the outlet opening (102), a curved portion (121, 131) which is designed to deflect the direction of flow of the fluid stream in the region of the outlet opening (102).

Description

Fluidic component

The invention relates to a fluidic component according to the preamble of claim 1 and a Fluidverteilungsgerat comprising a fluidic component. The fluidic component is provided for generating a moving fluid jet.

From the prior art, nozzles are known for generating a fluid jet at high speed or high pulse, which are designed to pressurize the fluid jet with a pressure which is higher than the ambient pressure. By means of the nozzle, the fluid is accelerated and / or directed or bundled. In order to generate a movement of a fluid jet, the nozzle is usually moved by means of a device. To generate a movable fluid jet, an additional device is thus required in addition to the nozzle. This additional device includes moving components that can easily wear out. The costs associated with manufacturing and maintenance are correspondingly high. Another disadvantage is that due to the movable components a relatively large overall space is required.

For generating a movable fluid flow (or fluid jet) further fluidic components are known. The fluidic components do not include any movable components that serve to generate a motile fluid flow. As a result, they do not have the disadvantages resulting from the moving components compared to the nozzles mentioned at the outset. Fluidic components can generate a temporally and / or spatially pulsating fluid jet, by means of which the cleaning performance of the cleaning device can be increased, in which the fluidic component is used.

However, in the design of a fluidic component, size ratios and minimum sizes of its components must be taken into account in order not to impair the functioning of the fluidic component. Taking account of these size ratios and minimum sizes, fluidic components achieve a construction volume that is so large that, for example, the useful volume present in the cleaning device considerably increases when a fluidic component is used in a cleaning device can be restricted. In some devices (such as hand showers) the available space is small due to the shape of the device. For this reason, despite their advantageous fluid jet characteristic, fluidic components are practically not used in fluid distribution devices, such as, for example, steam convection machines, hand or shower showers or cleaning appliances (eg dishwashers, dishwashers or washing machines).

The present invention has for its object to provide a fluidic component that can be installed as space-saving as possible in a fluid distribution device.

This object is achieved by a fluidic component having the features of claim 1. Embodiments of the invention are specified in the subclaims. Thereafter, the fluidic component comprises a front wall and a rear wall, which extend substantially parallel to a main extension plane of the fluidic component, and a flow chamber, which is arranged between the front wall and the rear wall. The front and the rear wall form boundary walls of the flow chamber. As a boundary wall may further be provided at least one side wall which connects the front and the rear wall with each other. The flow chamber can be flowed through by a fluid flow. For this purpose, the flow chamber has an inlet opening, through which the fluid flow enters the flow chamber, and an outlet opening, through which the fluid flow exits from the flow chamber. In this case, the flow direction of the fluid flow is substantially parallel to the main extension plane. The fluid stream may be a liquid stream, a gas stream or a multiphase stream (for example supersaturated steam). In particular, the fluid may be water or an aqueous solution.

The fluidic component is characterized in that the front wall and / or the rear wall in the region of the outlet opening has / have a curved section which is designed to deflect the flow direction of the fluid flow in the region of the outlet opening. In particular, the fluid flow can be deflected so that it is no longer directed parallel to the main extension plane of the fluidic component. Furthermore, the flow chamber has at least one means for forming an oscillation of the fluid flow in the region of the outlet opening. Upstream of the curved portion, the fluid flow oscillates in an oscillation plane. By the curved portion, the fluidic component can be installed in such a fluid distribution device that it rests with its front wall or its rear wall on a wall limiting the useful volume of the device (or is aligned parallel to this wall), wherein the fluid flow exits from the flow chamber in that it is not directed along the wall of the cleaning device (and the main plane of extension of the fluidic component), but exits the outlet opening at an angle to the wall of the device (and the main plane of extension of the fluidic component), which essentially corresponds to the concrete embodiment of FIG curved section depends. Thus, the fluidic component protrudes as little as possible into the useful volume of the device and restricts this less, without the operation of the fluidic component is affected by changing the relevant minimum sizes and proportions.

According to one embodiment, the fluidic component is designed essentially in the form of a cuboid, to which the curved section adjoins. The fluidic component has a component length, a component width and a component depth. The component width and component depth are defined perpendicular to each other and to the component length. The front and the rear wall determine the component length and the component width. The component length extends substantially parallel to the main propagation direction of the fluid flow, which moves as intended from the inlet opening to the outlet opening. If the front and the rear wall each have a curved portion, the component length is the distance between the inlet opening and the outlet opening, wherein the outlet opening is defined at the free ends of the curved portions. If only one of the two walls has a curved section, the component length is the distance between the inlet opening and the outlet opening, the outlet opening being defined directly (viewed in the direction of flow of the fluid stream) in front of the curved section of the one wall. The component depth is the distance between the front wall and the rear wall. Preferably, the component depth is smaller than the component width. For the component width, a distinction must be made between the internal component width and the external component width. While the internal component width is to be understood as meaning the width of the flow chamber, the external component width means the external width of the fluidic component. In the case of a substantially cuboidal fluidic component, the ratio of component length to internal component width can be 1/3 to 5/1. The ratio is preferably in the range of 1/1 to 4/1. The internal component width can be in a range of 0.15 mm to 2.5 m. In a preferred embodiment, the internal component width is between 1, 5 mm and 300 mm. The dimensions mentioned depend in particular on the application for which the fluidic component is to be used.

According to a further embodiment, the fluidic component has a component depth which is constant over the entire component length. Alternatively, the component depth may decrease (steadily (with or without a constant rise) or jump) from the inlet opening to the outlet opening. Due to the decreasing component depth, the fluid jet is pre-bundled within the fluidic component, so that a compact fluid jet emerges from the fluidic component. An expansion or bursting of the fluid jet can thus be delayed and thus does not take place directly at the outlet opening, but only further downstream. This measure is advantageous, for example, in cleaning technology. According to a further alternative, the component depth may increase from the inlet opening to the outlet opening. In contrast to a baffle nozzle, in which a fluid flow impinges on a surface and ruptures there, a more compact moving jet pulse is obtained in the fluidic component.

Depending on the application, various parameters, such as the size (for example, the volume and / or the component depth, internal component width, component length) of the fluidic component, the shape of the fluidic component, the type of fluid (gas, low viscosity liquid, liquid with high viscosity), the magnitude of the pressure applied to the fluid stream entering the fluidic component, the inlet velocity of the fluid, and the volumetric flow rate are varied. The oscillation frequency can be between 0.5 Hz and 30 kHz. A preferred frequency range is between 3 Hz and 400 Hz. The input pressure may be between 0.01 bar and 6000 bar above the ambient pressure. For some applications (so-called) low pressure applications, such as for washing machines or dishwashers, the inlet pressure is typically between 0.01 bar and 12 bar above ambient pressure.

According to one embodiment, the front wall and the rear wall each have an outlet-side end, wherein the curved portion is formed in the region of the outlet-side end of the front wall and the rear wall. In this case, the curved portion over the entire width of the front wall (external component width) or the rear wall at the outlet end extend. The expansion of the curved portion over the entire width is advantageous if the fluid flow in an oscillation plane emerges in an oscillating manner from the outlet opening, which is parallel to the component width. Thus, the oscillating fluid flow can be deflected by the curved portion at any time of the oscillation.

According to a further embodiment, the outlet opening is arranged between the front wall and the rear wall (for example as an interruption of the at least one side wall). In this case, the outlet opening extends from the front wall to the rear wall. Furthermore, the inlet opening may also be arranged between the front wall and the rear wall (for example as a further interruption of the at least one side wall) and extend from the front wall to the rear wall. According to one embodiment, the inlet opening and / or the outlet opening has / have a rectangular cross section. According to another embodiment, they are arranged outlet opening and the inlet opening on two opposite sides of the fluidic component.

According to one embodiment, the curved portion is not parallel to the main plane of extension of the fluidic component (and to the plane of oscillation of the fluid flow). The curved section protrudes from that plane. In particular, the curved portion may have a curvature in at least one plane (and parallel to this plane) which is oriented at an angle of 90 ° to the main extension plane of the fluidic component. This at least one plane can extend in particular parallel to the main propagation direction of the fluid flow (from the inlet opening to the outlet opening). In the case of an oscillating fluid flow, the orientation of the oscillation plane of the exiting fluid flow can be changed by means of such a curved section, wherein the fluid flow also oscillates in one plane after being deflected by the curved section. Thus, a fluid flow can be generated which has a substantially strip-shaped profile in a projection surface. Thus, the curved portion may have, for example, a curvature with the same shape and orientation over its entire width. If the curved section has a curvature in several planes, these can each be oriented at an angle of 90 ° to the main extension plane of the fluidic component and at an angle (from 0 ° to 180 °) to each other. If the curved section has a curve in several planes, then these can also be aligned at different angles to the main extension plane of the fluidic component. In this case, the individual planes in which the curved section lies, an angle of 0 ° to 180 ° with the main extension plane. For example, the curved section may have a shell shape (shark shell shape).

The curvature can be particularly continuous. The amount of curvature can be constant (circular arc) or variable. At a constant amount of curvature of the curved portion, the radius of curvature may be 0.75 to 50, preferably 1 to 8 in proportion to the component depth. The individual tangents at each point of the bend may include an angle of 0 ° to 170 °, in particular 0 ° to 90 °, with the main plane of extension of the fluidic component. This angle corresponds to the deflection angle. Preferably, the deflection angle is in a range between 0 ° and 170 °, in particular between 10 ° and 90 °, particularly preferably between 20 ° and 80 °. In the context of the present disclosure, the term curvature should also be understood to mean a linear deviation of the curved section from the front wall or the rear wall. This linear deviation may include an angle of 20 ° to 80 ° with the main plane of extension of the fluidic component.

According to one embodiment, the curved portion may have a free end with an edge. The free end of the curved portion is that end which, viewed in the longitudinal direction of the fluidic component, forms the end of the fluidic component. The edge can be square or rounded. When using a polygonal edge, expansion of the exiting fluid flow in a direction perpendicular to the plane of oscillation can be reduced / avoided. To further enhance this effect, a cavity may be provided in the end face of the edge. The end face is the side which is arranged between the side facing the flow chamber and the side facing away from the flow chamber perpendicular to these two sides. A cavity is a recess formed in the curved portion. In contrast, the fluid flow can be selectively expanded by using a rounded edge in a direction perpendicular to the plane of oscillation. This effect can be enhanced by using an interfering element on the face of the edge. An interference element is a projection which is formed on the front side. If only the front wall (rear wall) has a curved portion, the rear wall (front wall) - without curved portion - at its outlet-side free end have an edge which is square or rounded to shape the exiting fluid flow.

If only the rear wall (front wall) has a curved portion, the curved portion of the rear wall (front wall) may be downstream via the front wall (Rear wall) protrude. In this case, the curvature of the curved portion of the rear wall (front wall) on the front wall (rear wall) to be directed.

Alternatively, both the front wall and the rear wall may each have a curved portion. The curved sections can point in the same direction and / or be curved to the same extent. Further, the curved portions may be formed such that their free ends are substantially in a plane. According to a further embodiment, downstream of the curved section, a linear section may follow. The linear section can stabilize the exiting fluid flow after deflection in its deflected flow direction. Alternatively or additionally, a linear section may also be provided upstream of the curved section. The upstream linear portion may affect the position of the fluid flow deflected by the curved portion and expand the fluid flow perpendicular to its plane of oscillation. If a linear section is provided downstream of the curved section, the curved section no longer has a free end. However, in this case, the linear portion may have a free end with an edge. The free end of the linear section may be angular or rounded as described with respect to the free end of the curved section for shaping the exiting fluid flow.

In addition, at least one guide element can be provided for stabilization, which is arranged on the side of the curved portion of the rear wall (front wall) facing the front wall (rear wall) (ie, is arranged on the side of the curved section facing the flow chamber) and located in the Substantially extends along the flow direction. The at least one guide element serves to spatially stabilize the fluid flow during and after the deflection through the curved section.

Furthermore, at least one opening may be provided in the curved section, which allows fluid communication through the curved section. Fluid can drain through this opening, in particular after switching off the fluidic component. Thus it can be prevented that fluid collects in the fluidic component and there leads to deposits, mold or other unwanted accumulations. The flow chamber comprises at least one means for forming an oscillation of the fluid flow in the region of the outlet opening. Upstream of the curved portion, the fluid flow oscillates in an oscillation plane. In this case, the main extension plane of the fluidic component can be defined as essentially parallel to this oscillation plane. The curved section allows the orientation of the oscillation plane to be changed to the main extension plane of the fluidic component. Thus, the plane of oscillation of the fluid flow through the curved portion may be deflected such that the fluid flow downstream of the curved portion oscillates in a plane including an angle greater than 0 ° with the plane of oscillation of the fluid flow upstream of the curved portion.

In particular, the flow chamber can have a main flow channel, which connects the inlet opening and the outlet opening, and at least one side flow channel. The at least one bypass duct may be the means for forming the oscillation of the fluid flow in the region of the outlet opening.

The bypass duct is permeable by a part of the fluid flow, the secondary flow. The part of the fluid flow that does not enter the bypass duct but exits the fluidic component is called the main flow. The at least one bypass duct may have an inlet located near the outlet opening and an outlet located near the inlet opening. The at least one bypass duct can be arranged in the fluid flow direction (from the inlet opening to the outlet opening) next to (not behind or in front of) the main flow duct. In particular, two bypass ducts can be provided which extend laterally (as viewed in the main flow direction) next to the main flow duct, the main duct being arranged between the two bypass ducts. According to a preferred embodiment, the bypass ducts and the main flow duct are arranged in a row along the component width and each extend along the component length. Alternatively, the bypass ducts and the main flow duct may be arranged in a row along the component depth and each extend along the component length.

Preferably, the at least one bypass duct is separated from the main duct by a block. This block can have different shapes. Thus, the cross-section of the block may taper in the fluid flow direction (viewed from the inlet opening to the outlet opening). Alternatively, the cross section of the block may be centered between its end facing the inlet port and its Rejuvenate or increase outlet opening facing end. Also, an enlargement of the cross section of the block with increasing distance from the inlet opening is possible. In addition, the block may have rounded edges. Sharp edges may be provided on the block, in particular in the vicinity of the inlet opening and / or the outlet opening.

Another possibility for influencing the oscillation frequency of the exiting fluid jet can be provided by at least one separator, which is preferably provided at the inlet of the at least one bypass duct. The separator assists in splitting off the side stream from the fluid stream. In this case, a separator (transverse to the flow direction prevailing in the bypass duct) is to be understood as an element projecting into the flow chamber at the inlet of the at least one bypass duct. The separator may be provided as a deformation (in particular a recess) of the bypass duct wall or as an otherwise formed projection. Thus, the separator (circle) may be conical or pyramidal. The use of such a separator, besides influencing the oscillation frequency, also makes it possible to vary the so-called oscillation angle and the pressure drop of the fluid flow at the outlet opening. The oscillation angle is the angle swept by the oscillating fluid jet (between its two maximum deflections). If a plurality of bypass ducts are provided, a separator may be provided for each of the bypass ducts or only for a part of the bypass ducts.

The parameters of the fluidic component (shape, size, number and shape of the bypass channels, (relative) size of the inlet and outlet opening) are variously adjustable. For example, these parameters are selected such that the pressure, which is applied to the fluid flow via the inlet opening into the fluidic component, is dissipated substantially at the outlet opening. In this case, a slight reduction in pressure taking place at the outlet opening can already take place in the fluidic component (upstream of the outlet opening). This embodiment is advantageous, for example, when the fluid is a liquid (water). When the fluid is water vapor, said parameters may be selected so that the pressure applied to the fluidic fluid via the inlet port enters the fluidic component already before (upstream) the outlet port.

According to a further embodiment, the fluidic component has two or more outlet openings. These outlet openings can by arrangement of a Flow divider immediately upstream of the outlet openings are formed. The flow divider is a means for splitting the fluid flow into two or more sub-streams. A fluidic component having two or more outlet ports is adapted to produce two or more fluid jets that pulsately exit the fluidic component in time. Within a pulse, a (minimum) local oscillation can occur.

The flow divider may have different shapes, but all have in common that they broaden downstream along the component width of the fluidic component. The flow divider may extend into the fluidic component, for example into the main flow channel. In this case, the flow divider can be arranged so symmetrically (with respect to an axis extending parallel to the component length) that the outlet openings are identical in shape and size. However, other positions are possible that can be chosen depending on the desired pulse characteristic of the exiting fluid jets.

The oscillating fluid jet emerging from the fluidic component has high removal and cleaning performance due to its compactness and high speed when it is directed at a surface. Therefore, the fluidic component can be used, for example, in cleaning technology, in particular in washing machines and dishwashers.

According to a further embodiment, the front wall and / or the rear wall of the fluidic component in the region of the outlet opening has / has a curved section whose curvature lies in a plane which is at an angle of 90 ° to the main extension plane of the fluidic component and substantially perpendicular is aligned with a main propagation direction of the fluid flow upstream of the curved portion. In this case, the main propagation direction of the fluid flow along the component length (or from the inlet opening to the outlet opening of the flow chamber) is defined. It can thereby be achieved that, in the case of an oscillating fluid flow (which has been generated in the flow chamber), the oscillation plane is deformed into an oscillation surface which is not planar. Thus, a fluid flow can be generated, which has a profile in a projection surface (spray pattern) corresponding to the curvature of the curved portion.

Fluidic components that produce such a spray pattern are particularly advantageous when the technical equipment in which they are to be used, structural Have limitations, for example, when the fluidic components are to be arranged in tubular elements. Thus, despite the tubular structural restriction, the curvature of the oscillation surface allows the fluid to flow unhindered (without colliding with the tubular element and thus without reducing the spray pattern) into the technical installation. Further, by increasing the oscillation angle despite the tubular structural restriction, the spray pattern of the fluid flow can be increased. Nozzles with moving components to produce a moving fluid stream are often unsuitable for devices with structural limitations. The curvature of the front wall and / or the rear wall can, for example, be circular-arc-shaped (for example semicircular or sickle-shaped). Alternatively, the curvature may have other continuous shapes (S-shaped). The curved portion may be formed in the front wall and / or the rear wall of the fluidic component. Due to the Coanda effect, the fluid flow adapts to the surface of the front wall or the rear wall and assumes the curved shape of the front or rear wall.

According to another embodiment, the curved portion extends from its upstream end to its downstream end along an axis which may be substantially parallel to the main extension plane of the fluidic component. The axis is defined in particular along the component length. In this case, the plane of oscillation of the fluid flow is merely deformed. Alternatively, the curved portion may extend from its upstream end to its downstream end along an axis including an angle between 0 ° and 160 ° with the main extension plane of the fluidic component, which axis may be oriented transverse to the component width. In this case, on the one hand, the oscillation plane of the fluid flow is deformed to a non-planar oscillation surface and, on the other hand, the entire oscillation surface is aligned according to the angle with respect to the main extension plane.

The invention further relates to fluid distribution devices, in particular a cleaning device, which comprise the fluidic component according to the invention. The cleaning device may in particular be a flushing device such as a dishwasher, an industrial parts cleaning device or a washing machine. The fluidic component according to the invention can also be used in mixing devices. The invention will be explained in more detail by means of embodiments in conjunction with the drawings.

Show it:

1 shows a cross section through a fluidic component according to a

Embodiment of the invention;

Fig. 2 is a sectional view of the fluidic component of Figure 1 along the line

A'-A ';

Fig. 3 is a sectional view of the fluidic component of Figure 1 along the line

4 shows three snapshots (FIGS. A) to c) of an oscillation cycle of a fluid flow for illustrating the flow direction of the fluid flow through which the fluidic component from FIG. 1 flows;

5 shows a cross section through a fluidic component according to another

Embodiment of the invention;

Fig. 6 is a sectional view of the fluidic component of Figure 5 along the line

A'-A "; Fig. 7a) -f) are sectional views of a fluidic component according to another

Embodiments of the invention, wherein the views respectively correspond to those of Figure 2;

Fig. 8a) -d) curved sections in sectional view according to various

Embodiments;

9 is a sectional view of a fluidic component according to another

Embodiment of the invention, wherein the view corresponds to that of Figure 2;

10a) -e) top view of the front side of curved sections according to various embodiments; 11a) -b) are sectional views of a fluidic component according to further embodiments of the invention, the views corresponding to those of FIG. 3;

12 is a fluidic component according to another embodiment of the

Invention, which is attached to a wall of a cleaning device;

13 shows a cross section through a fluidic component with two outlet openings according to an embodiment;

14 shows a cross section through a fluidic component with two outlet openings according to a further embodiment; 15 is a perspective view of a fluidic component according to another embodiment, wherein the inner geometry of the fluidic component is shown in dashed lines; a side view (viewed along the component width) of the fluidic component of Figure 15, wherein the inner geometry of the fluidic component is shown in dashed lines;

Fig. 17 is a side view (viewed along the component length) of the fluidic

Component of Figure 15;

Fig. 18 is a side view (viewed along the component depth) of the fluidic

Component of Figure 15, wherein the inner geometry of the fluidic component is shown in dashed lines; FIG. 19 shows a sectional view of the fluidic component from FIG. 17 along the

Line C'-C ";

Fig. 20 is a side view (viewed along the component width) of a fluidic

Component according to another embodiment, wherein the inner geometry of the fluidic component is shown in dashed lines; Fig. 21 is a side view (viewed along the component length) of the fluidic

Component of Figure 20;

FIG. 22 shows a sectional view of the fluidic component from FIG. 21 along the

Line D'-D ";

Fig. 23 is a side view (viewed along the component length) of a fluidic

Component according to another embodiment; Fig. 24 is a side view (viewed along the component length) of a fluidic

Component according to another embodiment;

Fig. 25 is a side view (viewed along the component width) of two stacked fluidic components according to the embodiment of Figure 24; and

FIG. 26 shows a side view (viewed along the component length) of the two fluidic components of FIG. 25 stacked on top of each other. FIG. 1 schematically shows a fluidic component 1 according to an embodiment of the invention. Figures 2 and 3 show a sectional view of this fluidic component 1 along the lines A'-A "and B'-B". The fluidic component 1 comprises a flow chamber 10 through which a fluid flow 2 can flow (FIG. 4). The flow chamber 10 is also referred to as the interaction chamber.

The flow chamber 10 comprises an inlet opening 101, via which the fluid flow 2 enters the flow chamber 10, and an outlet opening 102, via which the fluid flow 2 exits the flow chamber 10. The inlet opening 101 and the outlet opening 102 are arranged on two opposite sides of the fluidic component 1 between a front wall 12 and a rear wall 13. The fluid stream 2 moves in the flow chamber 10 substantially along a longitudinal axis A of the fluidic component 1 (connecting the inlet opening 101 and the outlet opening 102 to each other) from the inlet opening 101 to the outlet opening 102.

The longitudinal axis A forms an axis of symmetry of the fluidic component 1. The longitudinal axis A lies in two mutually perpendicular symmetry planes S1 and S2. While the fluidic component 1 with respect to the plane of symmetry S1 only partially is mirror-symmetrical, the fluidic component 1 is completely mirror-symmetrical with respect to the plane of symmetry S2. Alternatively, the fluidic component 1 can not be constructed symmetrically (mirror). The plane of symmetry S1 is (parallel to) the main extension plane of the fluidic component 1.

The distance between the inlet port 101 and the outlet port 102 (the component length I) may have a ratio to the internal component width b, from 1/3 to 4/1, preferably from 1/1 to 4/1. The internal component width b, can be in the range between 0, 15 mm and 2.5 m. In a preferred embodiment, the internal component width b, between 1, 5 mm and 300 mm. The width bsx of the outlet opening

102 is 1/3 to 1/50 of the internal component width b 1, preferably 1/5 to 1/15. The width bsx of the outlet opening 102 is selected as a function of the volumetric flow rate, the component depth t, the input velocity of the fluid or the inlet pressure of the fluid and the desired oscillation frequency. The width biN of the inlet opening 101 is 1/3 to 1/20 of the internal component width b 1, preferably 1/5 to 1/10.

For a specific change of direction of the fluid flow, the flow chamber 10 comprises, in addition to a main flow channel 103, two bypass ducts 104a, 104b, the main flow duct 103 (viewed transversely to the longitudinal axis A) being arranged between the two bypass ducts 104a, 104b. Immediately behind the inlet opening 101, the flow chamber 10 divides into the main flow channel 103 and the two bypass channels 104a, 104b, which are then brought together again immediately in front of the outlet opening 102. The two bypass channels 104a, 104b are identically shaped and arranged symmetrically with respect to the axis of symmetry S2 (FIG. 3). According to an alternative, not shown, the bypass ducts are not arranged symmetrically.

The main flow channel 103 essentially connects the inlet opening 101 and the outlet opening 102 to one another in a straight line in the embodiment shown in FIG. 1, so that the fluid flow 2 in the main flow channel 103 essentially flows along the longitudinal axis A of the fluidic component 1. Alternatively, the main flow channel

103 sickle-shaped inlet port 101 and the outlet port 102 connect to each other. The bypass ducts 104a, 104b extend, starting from the inlet opening 101, in a first section, each initially at an angle of substantially 90 ° to the longitudinal axis A in opposite directions. Subsequently, the bypass ducts 104a, 104b bend so that they extend in each case substantially parallel to the longitudinal axis A (in the direction of the outlet opening 102) (second section). Around In order to recombine the bypass ducts 104a, 104b and the main flow duct 103, the bypass ducts 104a, 104b again change direction at the end of the second section, so that they are respectively directed substantially in the direction of the longitudinal axis A (third section). In the embodiment of Figure 1, the direction of the bypass ducts 104a, 104b changes at the transition from the second to the third section by an angle of about 120 °. However, for the change of direction between these two sections of the bypass ducts 104a, 104b, angles other than the one mentioned here can also be selected. The bypass ducts 104a, 104b are a means for influencing the direction of the fluid flow 2, which flows through the flow chamber 10. For this purpose, the bypass ducts 104a, 104b respectively have an inlet 104a1, 104b1, which is formed by the end of the bypass ducts 104a, 104b facing the outlet opening 102, and in each case an outlet 104a2, 104b2 which extends through the end of the bypass ducts 104a facing the inlet opening 101 , 104b is formed. Through the inputs 104a1, 104b1 flows a small part of the fluid flow 2, the secondary streams 23a, 23b (Figure 4), in the bypass channels 104a, 104b. The remaining part of the fluid flow 2 (the so-called main flow 24) exits the fluidic component 1 via the outlet opening 102 (FIG. 4). The secondary streams 23a, 23b emerge at the exits 104a2, 104b2 from the bypass ducts 104a, 104b, where they can exert a lateral (transversely to the longitudinal axis A) impulse on the fluid flow 2 entering through the inlet opening 101. In this case, the direction of the fluid flow 2 is influenced in such a way that the main flow 24 emerging at the outlet opening 102 spatially oscillates, in a plane in which the main flow passage 103 and the bypass flow passages 104a, 104b are arranged. The oscillation plane in which the main current 24 oscillates corresponds to the plane of symmetry S1 or is parallel to the plane of symmetry S1. The oscillation plane is parallel to the main extension plane of the fluidic component 1. FIG. 4, which represents the oscillating fluid flow 2, will be explained in more detail later. The bypass ducts 104a, 104b each have a cross-sectional area which is almost constant over the entire length (from the inlet 104a1, 104b1 to the outlet 104a2, 104b2) of the bypass ducts 104a, 104b. On the other hand, the size of the cross-sectional area of the main flow passage 103 in the flow direction of the main flow 23 (that is, in the direction from the inlet port 101 to the outlet port 102) steadily increases, and the shape of the main flow passage 103 is mirror-symmetrical to the planes of symmetry S1 and S2. The main flow channel 103 is separated from each bypass channel 104a, 104b by a block 11 a, 11 b. The two blocks 11 a, 11 b are identical in shape and size in the embodiment of Figure 1 and arranged symmetrically with respect to the mirror plane S2. In principle, however, they can also be designed differently and / or not aligned symmetrically. In non-symmetrical alignment and the shape of the main flow channel 103 is not symmetrical to the mirror plane S2. The shape of the blocks 11 a, 11 b, which is shown in Figure 1, is only an example and can be varied. The blocks 11 a, 11 b of Figure 1 have rounded edges. At the entrance 104a1, 104b1 of the bypass ducts 104a, 104b, also separators 105a, 105b are provided in the form of indentations. In this case, at the inlet 104a1, 104b1 of each bypass duct 104a, 104b, a recess 105a, 105b projects over a section of the peripheral edge of the bypass duct 104a, 104b into the respective bypass duct 104a, 104b and changes its cross-sectional shape at this point while reducing the cross-sectional area. In the embodiment of Figure 1, the portion of the peripheral edge is chosen so that each indentation 105a, 105b (among other things) is directed towards the inlet opening 101 (oriented substantially parallel to the longitudinal axis A). Alternatively, the separators 105a, 105b may be oriented differently. The separation of the secondary streams 23a, 23b from the main stream 24 is influenced and controlled by the separators 105a, 105b. By the shape, size and orientation of the separators 105a, 105b, the amount flowing from the fluid stream 2 into the bypass channels 104a, 104b and the direction of the secondary streams 23a, 23b can be influenced. This in turn leads to an influence of the outlet angle of the main flow 24 at the outlet opening 102 of the fluidic component 1 (and thus to influencing the oscillation angle) and the frequency at which the main flow 24 oscillates at the outlet opening 102. By selecting the size, orientation and / or shape of the separators 105a, 105b, the profile of the main flow 24 exiting at the outlet opening 102 can thus be influenced in a targeted manner. Alternatively, it is also possible to provide a separator only at the inlet of one of the two bypass ducts. According to another alternative, no separators can be provided.

The inlet opening 101 of the flow chamber 10 is upstream of a funnel-shaped projection 106, which tapers in the direction of the inlet opening 101 (downstream). The flow chamber 10 also tapers in the region of the outlet opening 102. The taper is formed by an outlet channel 107 which extends between the separators 105 a, 105 b and the outlet opening 102. In this case, the funnel-shaped projection 106 and the outlet channel 107 taper so that only whose width, that is to say the extent of which in the plane of symmetry S1 perpendicular to the longitudinal axis A, decreases in each case downstream. According to a variant, the outlet channel 107 initially tapers and then widens again downstream. This geometric shape additionally provides a means for adjusting the oscillation angle of the fluid flow. The taper does not affect the depth, that is, the extent in the plane of symmetry S2 perpendicular to the longitudinal axis A, the neck 106 and the outlet channel 107 (Figure 2). Alternatively, the lug 106 and the outlet channel 107 may also taper in width and depth, respectively. Further, only the lug 106 may taper in depth or width while the outlet channel 107 tapers both in width and depth, and vice versa. The extent of the taper of the outlet channel 107 influences the directional characteristic of the fluid flow 2 emerging from the outlet opening 102 and thus its oscillation angle. The shape of the funnel-shaped projection 106 and the outlet channel 107 are shown in FIG. 1 by way of example only. Here, their width decreases downstream each linear. Other forms of rejuvenation are possible.

The inlet opening 101 and the outlet opening 102 each have a rectangular cross-sectional area. Alternatively, the cross-sectional area may also have other shapes.

Downstream of the outlet opening 102, the rear wall 13 has a curved portion 131. The curved portion 131 is formed by a rectangular basic shape that is wound around an axis extending substantially along the internal and external component width bi, b _e toward the front wall 12. The curved portion 131 is designed to deflect the fluid flow from the original oscillation plane (parallel to the plane of symmetry S1) by an angle α. The deflection angle α may be in a range of 0 ° to 170 °, in particular between 10 ° and 90 °, particularly preferably between 20 ° to 80 °. In the embodiment of Figure 1, the deflection angle α is about 65 °. In this case, the deflection angle α is constant over the entire width of the curved portion 131. Alternatively, the deflection angle α across the width of the curved portion 131 may be variable. The curved portion 131 extends over the entire external component width b _e or over the internal component width b ,. Alternatively, the curved portion 131 may extend over a smaller area, but at least the width bsx of the outlet opening 102. According to a further alternative, the curved portion 131 has no rectangular, but a trapezoidal, triangular, semi-circular or other planar basic shape. The curved portion 131 has a curvature with a constant curvature. Accordingly, the curved portion 131 is curved along a circular arc of radius r (FIG. 2). The ratio of radius r to the component depth t is between 3/4 and 50/1, preferably 1/1 and 8/1. Alternatively, the amount of curvature may be variable, so that the curved portion 131 is formed as a free-form surface.

In the embodiment of FIGS. 1 to 3, the curved section does not directly adjoin the outlet opening 102, but is separated therefrom by a linear section 132. The linear portion 132 upstream of the curved portion 131 may serve to influence the position of the fluid flow after the deflection and to expand the fluid jet perpendicular to its plane of oscillation. According to an alternative, the curved portion 131 immediately adjoins the outlet opening 102.

FIG. 4 shows three snapshots of a fluid flow 2 for illustrating the flow direction (flow lines) of the fluid flow 2 in the fluidic component 1 from FIG. 1 during an oscillation cycle (FIGS. A) to c)). In Figures a) and c), the flow lines for two deflections of the exiting main flow 24 are shown, which correspond approximately to the maximum deflections. The angle that the exiting main flow 24 passes between these two maxima is the oscillation angle. Figure b) shows the flow lines for a position of the exiting main flow 24, which lies approximately in the middle between the two maxima from the figures a) and c). The following describes the flows within the fluidic component 1 during an oscillation cycle.

First of all, the fluid flow 2 is conducted into the fluidic component 1 via the inlet opening 101 at a predetermined inlet pressure. The fluid flow 2 hardly experiences a pressure loss in the region of the inlet opening 101, since it can flow undisturbed into the main flow channel 103. The fluid flow 2 initially flows along the longitudinal axis A in the direction of the outlet opening 102.

By introducing a single accidental or targeted disturbance of the fluid flow 2 is laterally deflected in the direction of the main flow channel 103 facing side wall of a block 11 a, so that the direction of the fluid flow 2 increasingly deviates from the longitudinal axis A until the fluid flow is deflected maximum. Due to the so-called Coanda effect, most of the fluid flow 2, the so-called main flow 24, settles. doing to the side wall of a block 11 a and then flows along this side wall. In the area between the main flow 24 and the other block 11 b, a recirculation area 25b is formed. In this case, the recirculation area 25b increases the more the main flow 24 to the side wall of a block 11 a applies. The main stream 24 exits the outlet port 102 at a time varying angle with respect to the longitudinal axis A. In Figure 4a), the main flow 24 is applied to the side wall of the one block 11 a and the recirculation area 25b has its maximum size. In addition, the main flow 24 emerges from the outlet opening 102 with approximately the greatest possible deflection.

A small part of the fluid flow 2, the so-called sidestream 23a, 23b, separates from the main flow 24 and flows into the bypass ducts 104a, 104b via their inlets 104a1, 104b1. In the situation shown in Figure 4a) (due to the deflection of the fluid flow 2 in the direction of the block 11 a) of the part of the fluid flow 2, which flows into the bypass duct 104 b, which borders on the block 11 b, on whose side wall, the main flow 103 does not apply, significantly larger than the part of the fluid flow 2, which flows into the bypass duct 104 a, which adjoins the block 11 a, on the side wall of which the main current 103 applies. In FIG. 4a), therefore, the secondary flow 23b is significantly greater than the secondary flow 23a, which is almost negligible. As a rule, the deflection of the fluid flow 2 into the bypass ducts 104a, 104b can be influenced and controlled by separators. The secondary streams 23a, 23b (in particular the secondary stream 23b) flow through the secondary flow channels 104a or 104b to their respective outlets 104a2, 104b2 and thus give a pulse to the fluid stream 2 entering at the inlet opening 101. Since the sub-stream 23b is larger than the sub-stream 23a, the pulse component resulting from the sub-stream 23b outweighs.

The main stream 24 is thus pressed by the pulse (the secondary stream 23 b) to the side wall of the block 11 a. At the same time, the recirculation area 25b moves toward the entrance 104b1 of the bypass passage 104b, thereby disturbing the supply of fluid into the bypass passage 104b. The pulse component resulting from the bypass 23b decreases therewith. At the same time, the recirculation area 25b decreases, while a further (growing) recirculation area 25a is formed between the main flow 24 and the side wall of the block 11a. In this case, the supply of fluid in the bypass duct 104a increases. The pulse component resulting from the bypass 23a increases with it. The pulse components of the secondary streams 23a, 23b continue to approach in the further course, until they are the same size and cancel each other out. In this situation, the incoming fluid stream becomes 2 not deflected, so that the main flow 24 approximately centrally between the two blocks 11 a, 11 b moves and exits without deflection from the outlet opening 102. Figure 4b) does not show exactly this situation, but a situation shortly before. Further, the supply of fluid into the bypass passage 104a continues to increase, so that the pulse component resulting from the bypass 23a exceeds the pulse component resulting from the bypass 23b. The main flow 24 is thereby pushed further and further away from the side wall of the block 11 a until it abuts the side wall of the opposite block 11 b due to the Coanda effect (Figure 4c)). The recirculation area 25b dissolves while the recirculation area 25a increases to its maximum size. The main flow 24 now emerges from the outlet opening 102 with maximum deflection, which has an inverse sign in comparison to the situation from FIG. 4 a). Subsequently, the recirculation area 25a will migrate and block the entrance 104a1 of the bypass duct 104a, so that the supply of fluid here again decreases. As a result, the secondary flow 23b will deliver the dominant momentum component so that the main flow 24 is again forced away from the side wall of the block 11b. The changes described are now in reverse order.

By the operation described, the main flow 24 exiting at the outlet port 102 oscillates about the longitudinal axis A in a plane in which the main flow passage 103 and the bypass passages 104a, 104b are arranged, so that a fluid jet drifting back and forth is generated. In order to achieve the described effect, a symmetrical structure of the fluidic component 1 is not absolutely necessary.

FIGS. 5 and 6 show a further embodiment of the fluidic component according to the invention. The fluidic component 1 from FIGS. 5 and 6 differs from that of FIGS. 1 to 3 in particular by the curved portion 131. 2 corresponds to the perspective from FIG. 2 (sectional view along the line A'-A "), since the fluidic component 1 from FIG. 5 upstream of the outlet opening 102 corresponds to the fluidic component 1 from FIG. Corresponds to the sectional view of the fluidic component of Figure 5 taken along the line B'-B "that of Figure 3 and is not shown separately.

In the embodiment of Figures 5 and 6, the curved portion 131 is formed in a half-shell shape. Here, the curved portion 131 has a curvature in multiple planes aligned at different angles (in a range of 0 ° to 180 °) to each other and at a fixed angle to the main plane of extension (for example 90 °). Alternatively, the planes may be oriented at different angles (in a range of 0 ° to 180 °) to each other and to the main plane of extension. The basic shape of the half shell-shaped curved portion 131 is a circle segment, that is, a partial area of a circular area bounded by a circular arc and a chord. The half shell-shaped curved portion 131 has a curvature with different radii of curvature r, the size of which is in proportion to the component depth t 1/2 to 50/1. According to an alternative, the radius of curvature r (in said size range) may be constant over the entire curved portion 131.

The curved portion 131 extends over the entire external component width b _e . Alternatively, the curved portion 131 may extend only over part of the external component width b _e (for example, over the internal component width b 1), but at least over the width bsx of the outlet opening 102. According to a further alternative, the curved portion 131 may extend beyond the external component width b _e . Sectionally (viewed along the component width b, b _e ), a linear section 132 is arranged upstream of the curved section 131, as can be seen in FIG.

On the front wall 12 facing side of the curved portion 131 a plurality of guide elements 14 (in this case, specifically five guide elements 14) are arranged. The guide elements 14 are each formed as an elongated projection. The guide elements 14 are aligned substantially along the fluid flow direction. However, since the curved portion 131 is half-shell-shaped, the individual vanes 14 do not extend parallel to each other but radiate with the downstream increasing distance between two adjacent vanes 14. According to an alternative, the curved portion 131 has no vanes. Although the guide elements 14 are concretely described only in connection with the embodiment of Figures 5 and 6, but can also be provided in the other embodiments. For example, in the embodiment of FIG. 1, a plurality of guide elements can be distributed over the entire width of the curved section and arranged substantially parallel to one another (along the axis A). Alternatively, they may be arranged in a radial manner as in FIG. 5, corresponding to the orientation of the fluid flow which is variable by the oscillatory movement. FIG. 7 shows further embodiments of the fluidic component according to the invention, the sectional representations respectively corresponding to those of FIG.

The embodiment of sub-image 7a) differs from the embodiment of FIG. 2 in particular in that downstream of the curved section 131, a linear section 132 follows. The downstream linear portion 132 may provide spatial stabilization of the fluid flow deflected by the curved portion 131. The embodiment of sub-image 7b) differs from the embodiment of sub-image 7a) in particular in that in addition to the rear wall 13 and the front wall 12 has a curved portion 121. In this case, both curved sections 121, 131 are directed in the same direction. The curved sections 121, 131 of the front wall 12 and the rear wall 13 are followed downstream by a respective linear section 122, 132. The lengths of the two linear sections 122, 132 are chosen such that the free ends of the linear sections 132 are arranged in one plane. The outlet opening 102 is defined at the free ends of the linear sections 122, 132 in this embodiment. The curved sections 121, 131 and the linear sections 122, 132 are arranged relative to one another such that the component depth t decreases downstream with t-i> t.2> t.3. By the taper of the fluidic component 1 at its outlet end of the exiting fluid flow is bundled.

Alternatively, the component depth t can remain constant over the entire component length I (from the inlet opening 101 to the outlet opening 102) (partial image 7c)). The embodiment of part 7c) corresponds - with the exception of the development of the component depth t - in principle, the embodiment of part 7b). Another difference is the lengths of the linear sections 122, 132 and the size of the deflection angle α. In the embodiment of part 7c), the linear sections 122, 132 are shorter and the deflection angle α is smaller than in the embodiment of part 7b).

The embodiment of part of Figure 7d) differs from the embodiment of Figure 2, in particular, that in addition to the rear wall 13 and the front wall 12 has a curved portion 121. In this case, both curved sections 121, 131 are directed in the same direction. The curved sections 121, 131 of the front wall 12 and the rear wall 13 are not followed by linear sections. The lengths of the curved sections 121, 131 are chosen such that their free ends 1211, 1311 are arranged in a plane which is substantially perpendicular to the Main extension plane of the fluidic component 1 (and the component length I) is. The outlet opening 102 is defined in this embodiment at the free ends 1211, 1311 of the curved portions 121, 131. The embodiments of the partial images 7e) and 7f) essentially correspond to the embodiment of partial image 7d). They differ from the latter in particular in that the front wall 12 and the rear wall 13 additionally each have a curved portion 121, 131 in the region of the inlet opening 101. The curved portions 121, 131 of the front wall 12 and the rear wall 13 in the region of the inlet opening 101 are respectively directed in the same direction. In panel 7e), the curved portions 121, 131 of the inlet opening 101 are also directed in the same direction as the curved portions 121, 131 of the outlet opening 102, while in the partial image 7f), the curved portions 121, 131 of the inlet opening 101 are directed in the opposite direction are. Due to the additional curvature in the region of the inlet opening 101, a further installation space optimization of the fluidic component 1 can be achieved.

Various embodiments for the design of the free end 1311 of a curved portion 131 of the rear wall 13 (front wall) and the free end 123 of the front wall 12 (rear wall) in the region of the outlet opening 102 are shown in FIG. If a linear section 131 adjoins a curved section 131 downstream, then the features described below with regard to the free ends 1311, 123 can be transferred to the free end of the linear section. In part image 8a), the free end 123 of the front wall 12 has an angular edge, while the free end of the curved portion has a rounded edge. The angular configuration reduces the expansion of the fluid flow perpendicular to its plane of oscillation, while a rounded configuration helps to widen the fluid flow perpendicular to its plane of oscillation. The embodiment of sub-image 8a) is therefore suitable for generating a fluid flow which is expanded in one direction (namely in the direction of the rear wall 13). Depending on the specific configuration of the edges, the expansion can be finely adjusted. For example, tapered free ends 123, 1311 (as shown in FIG. 8b) are suitable for largely preventing expansion. In part 8c), the free end 123 of the front wall 12 is primarily rounded, but also has a polygonal component. Thus, the free end 123 of the front wall 12 is slightly more angular than the free end 1311 of the curved portion 131 of the rear wall 13, so that the fluid flow in Direction of the rear wall 13 slightly more extensive than in the direction of the front wall 12. The free end 1311 of the curved portion 131 in part 8d) has an angular edge. On the front wall 12 facing side of the curved portion 131, a cavity 15 is formed. The cavity 15 is a recess in the surface of the curved portion 131. The cavity 15 can stabilize the exiting fluid flow and avoid / reduce expansion in the direction of the free end 1311. In contrast, the free end 123 of the front wall 12 in sub-image 8 d) has an edge with a disruptive element 16. The interference element 16 is a projection which is formed on the end face of the edge. The perturbation element 16 is suitable for expanding the fluid flow in the direction of the free end in which the perturbation element 16 is provided. The fault element

16 and the cavity 15 can be combined with each other, so that at the free ends only (one) interfering element (s), only (one) cavity (s) or both means can be provided. The designs of the free ends 123, 1311 shown in the partial images 8a) -d) can be freely combined as required. Further, the shapes of the free ends 1311 of the curved portions 131 may be transmitted to the free ends 123 of the front walls 12 and vice versa. FIG. 9 shows an embodiment of the fluidic component 1 which substantially corresponds to the embodiment of FIG. 7b), but differs from the latter by an opening 17 formed in the curved section 131 of the rear wall 13 and which fluidly connects through the curved section 131 allows through. The opening 17 is aligned parallel to the main extension plane of the fluidic component 1 and in particular parallel to the component length I. Through this opening 17, fluid can drain in particular after a shutdown of the fluidic component. The opening

17 can in principle also be combined with other embodiments of the fluidic component. In Figure 10, various embodiments of the end face of the free end 1311 of the curved portion 131 of the rear wall 13 are shown. In this case, the shape of the end face should in each case represent the shape of the entire curved section 131. Accordingly, the curved portions 131 next to a curvature, which are formed in a plane perpendicular to the component width b ,, b _e , also curvatures in other planes. The embodiments illustrated herein may also be transferred to a curved portion 121 of the front wall 12. The curved portions 131 shown in the partial images 10a) to 10e) each extend over the entire external component width b _e and are part of a rear wall 13. The respective lower edge is intended to face the front wall 12. The edges are here formed angular, but may be rounded (see comments on the figures 8a) to 8d)).

In sub-image 10a), the left side running along the component length I is directed away from the front wall, while the right side extending along the component length I is directed towards the front wall, so that the shape is substantially tildeformig as viewed along the external component width b _e , In partial image 10b), the left and right sides extending along the component length I are directed towards the front wall, respectively, so that the curved section is concavely curved viewed from the front wall. This embodiment can spatially concentrate the fluid flow. In partial image 10c), the left and right sides extending along the component length I are each directed away from the front wall, so that the curved portion is convexly curved viewed from the front wall. This embodiment can expand the fluid flow along the component width.

In the embodiments of the sub-images 10a) -10c), the radius of curvature (about axes that extend substantially along the length of the component) changes continuously, without the formation of cracks and edges. The embodiment of partial image 10d) corresponds in principle to the embodiment of partial image 10b), while the embodiment of partial image 10e) corresponds in principle to the embodiment of partial image 10c). The partial images 10d) and 10e) differ from the partial images 10b) and 10c) in that they have a curvature jump. The curvature jump is a sudden change in the curvature. The embodiments of the partial images 10d) and 10e) each have two surfaces which are arranged at an angle to each other and form an edge which extends substantially along the component length I. The concave or convex shape from the partial images 10d) and 10e) also have a bundling or expanding effect on the exiting fluid flow.

The deformations of the curved portion 131 shown in FIG. 10 can also be extended to the flow chamber 10 and its front and rear walls 12, 13. In FIG. 11 a), a flow chamber 10 (in a view corresponding to that of FIG. 3) is shown, which is formed on the basis of the shape of the curved section 131 of FIG. 10 a). The front and rear walls 12, 13 are each Tildenformig curved along the component width, wherein they have the same shape and orientation. In FIG. 11 b) shows a flow chamber 10 (in a view corresponding to that of FIG. 3), which is formed on the basis of the shape of the curved section from FIG. 10 c). The front and rear walls 12, 13 each describe a parabola along the component width, wherein they have the same shape and orientation. The main flow channels 103 and the bypass channels 104a, 104b are not exactly in one plane in FIGS. 11 a) and 11 b). Their relative orientation is rather adapted to the Tildenbeziehungsweise parabolic shape of the front and rear walls 12, 13. Alternatively, the main flow channel 103 and the bypass channels 104a, 104b may be arranged in a plane. The flow chambers 10 from FIGS. 11 a) and 11 b) are only examples. In addition, the flow chambers may also be formed in accordance with the shape of the curved portion 131 of FIGS. 10b), d) and e).

FIG. 12 shows by way of example a possibility of fastening a fluidic component 1 according to the invention to the wall 2 of a cleaning device. In this case, the fluidic component 1 rests with its front wall 12 on the wall 2 of the cleaning device and is attached to this (for example by means of screws). In particular, the fluidic component rests against the side of the wall 2 facing away from the useful volume 3. In the wall 2, an opening 21 is formed, through which the curved portion 131 of the rear wall 13 of the fluidic component 1 extends through and into the useful volume 3. If the curved section 131 is shorter than in the embodiment of FIG. 12, the fluidic component 1 can be arranged such that the fluid flow deflected by the curved section 131 flows through the opening 21 and into the useful volume 3. Alternatively, the fluidic component 1 can be arranged on the side of the wall 2 facing the useful volume 3. In this case, the fluidic component 1 with its rear wall 13 rest against the wall 2 and be attached thereto. The curved section 131 then projects from the wall 2 and into the useful volume 3. FIGS. 13 and 14 show two further embodiments of the fluidic component 1. These two embodiments differ from that of FIG. 1 in particular in that a flow divider 108 is provided in the outlet channel 107, but no separator is provided at the entrances 104a1, 104b1 of the bypass channels 104a, 104b. Also, the shape of the blocks 11 a, 11 b is different. However, the basic geometric properties of these two embodiments are the same as those of the fluidic component 1 of FIG. The flow divider 108 each has the shape of a triangular wedge. The wedge has a depth which corresponds to the component depth t in the region of the flow divider 108. (In this case, the component depth t is constant over the entire fluidic component 1, by way of example.) The flow divider 108 thus divides the outlet duct 107 into two subchannels with two outlet openings 102 and the fluid flow 2 into two substubes which emerge from the fluidic component 1. By virtue of the oscillation mechanism described in connection with FIG. 4, the two sub-streams emerge pulsed from the two outlet openings 102 and are deflected by the curved section 131. In the embodiment of Figure 13, the flow divider 108 extends substantially in the outlet channel 107, while in the embodiment of Figure 14 extends into the main flow channel 103. The shape and size of the flow divider 108 is in principle freely selectable depending on the desired application. It is also possible to provide a plurality of flow dividers (side by side along the component width) in order to subdivide the exiting fluid jet into more than two substreams.

Figures 13 and 14 also show two further embodiments of the blocks 11 a, 11 b. However, these forms are intended to be exemplary only and not limited to flow divider 108. Likewise, the blocks 11 a, 11 b may be formed differently when using a flow divider 108. The blocks of FIG. 13 have a substantially trapezoidal basic shape, which tapers downstream (in the width) and from whose ends a triangular projection in each case projects into the main flow channel 103. The blocks 11 a, 11 b of Figure 14 are similar to those of Figure 1, but have no rounded corners.

FIGS. 15 to 19 show various views of a further embodiment of the fluidic component 1. In this embodiment, the front wall 12 and the rear wall 13 each have a curved portion 121, 131 in the region of the outlet opening 102. In this embodiment, the outlet opening 102 of the flow chamber 10 is defined at the upstream end of the curved portions 121, 131, so that the curved portions 121, 131 immediately follow downstream of the outlet opening 102 of the flow chamber 10. In this case, the curved sections 121, 131 are respectively formed only on the side of the front wall 12 and the rear wall 13, which faces the rear wall 13 and the front wall 12, respectively. Alternatively, the curved portions 121, 131 may be additionally formed on the side of the front wall 12 and the rear wall 13 facing away from the rear wall 13 and the front wall 12, respectively. The curved sections 121, 131 define (viewed in the direction of the component depth t) an outlet region 18. The outlet region 18 has an outlet opening 181, which is formed by the downstream ends 1211, 1311 of the curved sections 121, 131. At the end of the outlet region 18 opposite the outlet opening 181, there is the outlet opening 102 of the flow chamber 10.

The shape of the curved portions 121, 131 changes from its upstream end (exhaust port 102) to its downstream end (exhaust port 181). The outlet opening 102 has a substantially rectangular cross-section whose size is determined by the width bsx and the depth. The curved sections 121, 131 each have, downstream of the outlet opening 102, a curvature that extends in a plane that is substantially perpendicular to the main extension plane of the fluidic component 1 and to the component length I. The curvature at the downstream end 1211, 1311 of the curved portions 121, 131 are each circular arc-shaped, with the radii of the two circular arcs differing, the centers of the two circular arcs lying on one another and the arcs extending over the same angle (in terms of size and orientation). The curved portions 121, 131 include at their downstream end 1211, 1311 the outlet port 181 of the outlet portion 18, which has a crescent-shaped cross-sectional area transverse to the outflow direction of the fluid flow 2 (Figure 17). The shape of the curved portions 121, 131 changes from its upstream end (discharge port 102) to its downstream end (discharge port 181) such that the cross-sectional area between the curved portions 121, 131 changes from a rectangular shape to a sickle shape. Alternatively, the outlet port 181 may also have an S-shaped cross-section. Accordingly, the curvature of the curved portions 121, 131 is S-shaped.

The curved portions 121, 131 are symmetrical from their upstream end to their downstream end with respect to a mirror plane S2 that is substantially perpendicular to the component width b (FIGS. 17 to 19). However, the curved portions 121, 131 may not be symmetrical or have a different symmetry than the mirror symmetry.

The amount of curvature of the curved portions 121, 131 in this embodiment is the same and non-zero at any point of the curve within any arbitrary plane (which is perpendicular to the component length I). The curvature therefore has a circular arc shape in this plane. Alternatively, the extent of the Curvature of the curved portions 121, 131 at individual (or all) points of the curvature be different in size within this plane. Within the same plane, the amount of curvature is different for each of the curved portions 121, 131 (due to the different circular arc radii rm, rm). The amount of curvature corresponds to the reciprocal of the radii rm and

, From the upstream end to the downstream end 1211, 1311 of the curved portions 121, 131, the circular arc radii rm, rm steadily increase, so that the amount of curvature within each curved portion 121, 131 changes from the upstream end to the downstream end 1211, 1311. In principle, the amount of curvature within each curved portion 121, 131 from the upstream end to the downstream end 1211, 1311 may also change differently. As the circular arc radii n ₂ i, n ₃ i increase steadily from the upstream end to the downstream end 1211, 1311 of the curved portions 121, 131, the angle over which the circular arcs extend remains constant. As a result, the length of the circular arcs (and also the cross-sectional area of the outlet portion 18) from the upstream end to the downstream end 1211, 1311 of the curved portions 121, 131 also increases steadily. Accordingly, the outlet opening 181 has a larger cross-sectional area than the outlet opening 102. At the outlet opening 181 of the outlet area 18, the curved portion 121 and / or the curved portion 131 can extend over the entire external component width b _e or over the internal component width b i , Alternatively, the curved portion 121 and / or the curved portion 131 at the outlet port 181 of the outlet portion 18 may extend over a different width, but at least the width bsx of the outlet port 102.

The distance tie between the curved portions 121, 131 is in this embodiment, within an arbitrary plane which is perpendicular to the component length I, constant and corresponds to the difference of the radii n ₂ i and rm. In addition, the distance ti ₈ from the upstream end to the downstream end of the outlet portion 18 is constant and corresponds to the depth of the outlet port 102. Basically, the distance tie from the outlet port 102 to the outlet port 181 (from the upstream end to the downstream end) may be variable.

The outlet region 18 is bounded by the curved sections 121, 131 on the one hand and by lateral boundary surfaces 182a, 182b on the other hand, the lateral Boundary surfaces 182a, 182b, the curved portions 121, 131 at the lateral ends (viewed along the component length I) connect together. Thus, the outlet region 18 forms a kind of tunnel which connects the outlet opening 102 and the outlet opening 181 to one another. 17 shows the sectional view of the fluidic component 1 from FIG. 17 along the line C'-C "The height of the line C'-C" is selected such that the lateral boundary surfaces 182a, 182b are clearly visible in the sectional view. In principle, however, the outlet region 18 can also be formed without the lateral boundary surfaces. In the presence of the lateral boundary surfaces 182a, 182b, these may restrict or slightly expand the oscillation angle of the fluid flow in the outlet region 18.

The length e of the outlet area 18 extends between the outlet opening 102 and the outlet opening 181 (FIG. 19). The length e of the outlet region 18 is dependent on different input variables, for example the inlet pressure of the fluid, the desired curvature of the oscillation plane of the fluid flow and the type of fluid. For example, at an inlet pressure above 1.5 bar (above ambient pressure), the length hs may be at least% of the outlet width bsx or the outlet tio2 of the outlet opening 102 of the flow chamber 10. As the inlet pressure increases, the length hs of the outlet area 18 increases. Thus, the length hs of the outlet area 18 may be up to 5 times the length of the component I (between the inlet opening 101 and the outlet opening 102 of the flow chamber 10).

The two curved portions 121 and 131 are formed to curve the plane of oscillation of the fluid flow 2 exiting the outlet port 102. Thus, by the curved portions 121, 131, the originally flat oscillation surface is steadily transferred by the guide of the curved portions 121, 131 (due to the Coanda effect) into a curved oscillation surface without hindering the oscillation of the fluid steel. In order to achieve this effect, one of the two curved sections 121, 131 would already be sufficient. As schematically indicated in FIG. 15, the fluid flow 2 emerging from the fluidic component 1 of FIG. 15 oscillates in a curved oscillation surface which has a crescent-shaped spray pattern.

Furthermore, the fluidic component 1 from FIGS. 15 to 19 has a flow chamber 10 and, upstream of the flow chamber 10, a funnel-shaped projection 106. The flow chamber 10 and the funnel-shaped projection 106 correspond in terms of structure and operation substantially the flow chamber 10 and the funnel-shaped projection 106 of the embodiments of Figures 1 and 5. The funnel-shaped approach 106 and the flow chamber 10 (from the inlet opening 101 to the outlet opening 102) have a constant component depth t. Basically, the component depth t does not have to be constant. FIGS. 20 to 22 show various views of a further embodiment of the fluidic component 1. This embodiment differs from that of FIGS. 15 to 19, in particular in that the outlet region 18 is deflected in the direction of the rear wall 13. In this embodiment, the convex side of the curvature of the curved portions 121, 131 is directed toward the rear wall 13. The axis connecting the center of the outlet opening 102 with the center of the outlet opening 181, in this embodiment, forms an angle α with the main plane of extension of the fluidic component. The angle α can be between 0 ° and 160 °. Accordingly, the outlet opening 102 and the outlet opening 181 along the component depth t are shifted from each other. By this (in comparison to the embodiment of Figures 15 to 19) additional deflection direction component, the curvature of the oscillation plane and thus the curvature of the spray angle is amplified, and the beam is moved out of the original oscillation plane.

The curved sections 121, 131 can also extend along a curved line in an arbitrary plane perpendicular to the component width, ie have a curvature in this plane. The curvature can be arbitrary. When the amount of curvature is zero, the curved portions 121, 131 in this plane between the outlet port 102 and the outlet port 181 are linear. In the embodiment of FIG. 20, the curved sections extend linearly in an arbitrary plane perpendicular to the component width, while they extend in an arbitrary plane perpendicular to the component length along an arcuate curvature. The chord lengths S121 and S131 of the arcuate curvature of the curved portions 121 and 131 may be the same length (FIG. 23) or different lengths (FIGS. 17, 21, 24). In the embodiments of FIGS. 17, 21 and 24, the chord length Si3i is greater than the chord length S121, since the circular arc radius Π3ΐ is greater than the circular arc radius rm, while the circular arcs extend over an equal angle and the centers of the two circular arcs lie on one another. In the embodiment of Figure 23, the chord lengths S121 and S131 are the same length, since the circular arc radii rm and rm are the same size and the circular arcs over an equal extend large angle, while the centers of the two circular arcs are offset from each other along the component depth. In the embodiment of FIG. 24, since the circular arcs each extend through an angle of 180 °, the difference between the chord lengths S121 and S131 is twice the distance between the curved portions 121, 131. The chord length (s) S121 and / or S131 may be greater than, less than, or equal to the internal component width b. The chord length can be varied depending on the desired spray angle and the desired curvature of the fluid flow.

The embodiments of FIGS. 23 and 24 may have an outlet region 18 whose axis, which connects the center of the outlet opening 102 with the center of the outlet opening 181, either forms an angle α with the main plane of extension of the fluidic component (based on the embodiment of FIGS 20 to 22) or in the main extension plane (based on the embodiment of Figures 15 to 19).

FIGS. 25 and 26 show an arrangement of two fluidic components 1 -1 and 1 2, wherein two fluidic components according to the embodiment of FIG. 24 have been selected here by way of example, in which the axis connecting the center of the outlet opening 102 with the Center of the outlet port 181 connects, each enclosing an angle α with the main extension plane of the fluidic component. In this case, the two fluidic components are identical and arranged in such a way (mirror-symmetrically) that the two front walls 12 face each other. In this embodiment, the two crescent-shaped outlet openings 181 are arranged in a plane and form a substantially annular outlet opening with an interruption hi / 2. With this arrangement of the two fluidic components, a conical spray pattern can be generated. Other relative arrangements of the two fluidic components are possible in which the outlet openings 181 are arranged side by side. Also, other (identical or not identical) fluidic components can be arranged together. The shapes of the fluidic components 1 of Figures 1 to 26 are only exemplary. The curved section according to the invention is also applicable to other already known fluidic components, such as fluidic components according to S. Gopalan and G. Russell, which work on the basis of beam collisions (eg known from WO 2008/076346 A2), Warren components (eg known from US Pat 2005/0077399 A1), fluidic components according to Bauer (eg known from US 4244230) or horseshoe components (eg known from US 4157161).

Claims

claims

A fluidic component (1) having a front wall (12) and a rear wall (13) substantially parallel to a main extension plane of the fluidic component

(1) and between which a flow chamber (10) is arranged, which can be traversed by a fluid flow (2) which enters the flow chamber (10) through an inlet opening (101) of the flow chamber (10) and through an outlet opening (102 ) of the flow chamber (10) from the flow chamber (10) and whose flow direction is substantially parallel to the main plane, characterized in that the front wall (12) and / or the rear wall (13) in the region of the outlet opening (102) has a curved Section (121, 131), which is configured to divert the flow direction of the fluid flow in the region of the outlet opening (102) and that the flow chamber (10) at least one means (104a, 104b) for forming an oscillation of the fluid flow

(2) in the region of the outlet opening (102), wherein the fluid flow oscillates upstream of the curved portion (121, 131) in an oscillation plane.

A fluidic component (1) according to claim 1, characterized in that the front wall (12) and the rear wall (13) each have an outlet end and that the curved portion (121, 131) in the region of the outlet end of the front wall (12) and the rear wall (13) is formed.

A fluidic component (1) according to claim 2, characterized in that the front wall (12) and the rear wall (13) each have a width and that the curved portion (121, 131) over the entire width of the front wall (12) and the Rear wall (13) at the outlet end extends.

4. Fluidic component (1) according to one of the preceding claims, characterized in that the outlet opening (102) between the front wall (12) and the rear wall (13) is arranged and extending from the front wall (12) to the rear wall (13). extends.

5. fluidic component (1) according to one of the preceding claims, characterized in that the curved portion (121, 131) is not parallel to the main extension plane of the fluidic component (1).

6. Fluidic component (1) according to one of the preceding claims, characterized in that the curved portion (121, 131) has a curvature in at least one plane, which is aligned at an angle of 90 ° to the main plane of extension.

7. Fluidic component (1) according to one of the preceding claims, characterized in that the curved portion (121, 131) has a free end (1211, 1311) with an edge, wherein the edge is square or rounded.

8. Fluidic component (1) according to one of the preceding claims, characterized in that the curved portion (131) of the rear wall (13) protrudes downstream beyond the front wall (12), provided that only the rear wall (13) has a curved portion (131). having.

9. fluidic component (1) according to any one of the preceding claims, characterized in that the curved portion (121, 131) downstream and / or upstream of a linear portion (122, 132) is connected.

10. Fluidic component (1) according to one of the preceding claims, characterized in that on the flow chamber (10) facing side of the curved portion (121, 131) at least one guide element (14) is provided which extends substantially along the flow direction extends.

Fluidic component (1) according to one of the preceding claims, characterized in that at least one opening (17) is provided in the curved section (121, 131).

A fluidic component (1) according to any one of the preceding claims, characterized in that the plane of oscillation in which the fluid flow (2) oscillates upstream of the curved portion (121, 131) is substantially parallel to the main plane of extension of the fluidic component (1).

13. The fluidic component (1) according to one of the preceding claims, characterized in that the flow chamber (10) has a main flow channel (103) which connects the inlet opening (101) and the outlet opening (102) to each other, and at least one bypass channel (104a, 104b) as a means for forming an oscillation of the fluid flow (2) in the region of the outlet opening (102).

14. Fluid distribution device with at least one device for generating a fluid jet, wherein the fluid distribution device is in particular a dishwasher, a dishwasher, an industrial parts cleaning device, a Dampfkonvektomat or a washing machine, characterized in that the at least one device is a fluidic component (1) according to one of previous claims or any one of claims 15 to 18.

15. Fluidic component (1) according to one of claims 1 to 13, characterized in that the curved portion (121, 131) has a curvature in a plane which is at an angle of 90 ° to the main extension plane of the fluidic component (1). and essentially parallel to one

Main propagation direction of the fluid flow (2) upstream of the curved portion (121, 131) is aligned.

16. A fluidic component (1) according to any one of claims 1 to 13, characterized in that the curved portion (121, 131) has a curvature in several planes, each at an angle of 90 ° to the main extension plane of the fluidic component (1 ) and are aligned at an angle of 0 ° to 180 ° to each other.

17. Fluidic component (1) according to one of claims 1 to 13, characterized in that the curved portion (121, 131) has a curvature in a plane which is at an angle of 90 ° to the main extension plane of the fluidic component (1). and is oriented substantially perpendicular to a main propagation direction of the fluid flow (2) upstream of the curved portion (121, 131).

18. A fluidic component (1) according to claim 17, characterized in that the curved portion (121, 131) extends from its upstream end to its downstream end along an axis substantially parallel to the main plane of extension of the fluidic component (1). or includes an angle (a) between 0 ° and 160 ° with the main plane of extension.