Manually actuated atomiser

The invention relates to an atomiser for a liquid whose droplets to Example to be deposited on a surface, and which is manually operated. Of the Nebulizer is suitable for spraying of aqueous or non-aqueous liquids, Emulsions and suspensions, solutions, inks, oils. The atomizer can be miniaturized be. It may contain microstructured elements.

The invention aims to provide a nebulizer, which requires no propellant gas, which is manually operated and to be atomized to the different properties Liquids, and can be adapted to the intended use.

There are known nebulizer, in which the pressurized liquid is a contains propellant gas or liquified propellant gas, with the liquid at the outlet from a nozzle is atomized, where appropriate, composed of vaporized propellant. Among the propellants used to date, there are gases that are physiologically harmful, or the impact on the environment, or are flammable. The container for the liquid must the gas pressure, optionally at elevated temperature, withstand and against Gas pressure be tight. If the partially during storage with liquid usually filled container or during the period of use of the sprayer, the valve on the container is not sufficiently gas-tight and the gas pressure due to the partially leaked gas decreases, the usefulness of the container or nebulizer may be limited.

Next are atomizers are known in which the liquid by means of a by Users manually operated pump is forced through a nozzle and atomized. Of the on the acting pressure liquid to be atomized, and thus the distribution of the Droplet size is the user operates depends on the force with which the pump. Of the Pressure at which the liquid is atomized, is of the behavior of the user dependent. The operation of such an atomizer can for untrained people be difficult if the atomized liquid at a predetermined location, for example, to be deposited on the user's skin.

A further known nebuliser is composed of an air pump and a container for the liquid to be atomized. The air pump consists of a piston, the manually in a cylinder is moved back and forth. The air flows out of a hole at the bottom of Cylinder from. To the cylinder of the liquid container is mounted, with a is provided thin dip tube which extends into the liquid in the liquid container. The other end of the dip tube is located directly adjacent to the hole in the bottom of the Cylinder. The axis of the dip tube is perpendicular to the direction in which the air flow the cylinder leaves. The liquid is of at sufficiently high speed flowing air sucked from the container is entrained with the air flow and atomized. The sucked with a stroke of the piston and the quantity of the liquid Distribution of the droplet size depends on the speed with which the air from the hole in the bottom of the cylinder outlet. Both features are difficult to reproduce.

In the known atomizers with manually operated pump, the discharge amount and the mean droplet size to user behavior dependent. The achievable Pressure is relatively low and is typically less than 0.8 MPa (8 bar). With vortex chamber nozzles, the outlet opening has a diameter of more than 300 micrometers, can be adequate for the purpose of discharge at relatively large achieve average particle size.

WO - 97/12687, a miniaturized high-pressure atomizer is known, with the small amounts, for example, 15 microliters of a liquid at a pressure of 5 to 60 MPa (50 to 600 bar), preferably 10 to 60 MPa can be atomized (100 to 600 bar). The (hydraulic) diameter of the nozzle channel is less than 100 micrometers, preferably 1 to 20 micrometers. In the generated aerosol of the average droplet diameter is less than 12 microns. The droplet size distribution is reproducible adjust. The aerosol may, for example, with the breath into the lungs reach. The liquid droplets are difficult from the air stream to a deposited surface on the incident of the aerosol-laden air stream.

WO - 97/20590 a locking mechanism is provided that for tensioning a spring can be used in an operated by spring force atomizer. The atomizer has two mutually rotatably mounted housing parts. Energy storage is, for example, a coil spring used by means of a screw-type thrust transmission turning the two housing parts can be clamped against each other manually. The locking mechanism is triggered manually by pressing a release button and moves a piston in a cylinder, which is a subset of a liquid ejected through a nozzle and is atomized.

This results in the object of providing a propellant-free atomiser with a Subset of a liquid reservoir is atomized discontinuously who for purely manual operation is appropriate, and with which the distribution of droplet size in the atomized jet regardless of the experience and behavior of the atomizer actuating person can be set reproducibly, and within a housing essentially contains the following elements:<ul><li>a storage vessel and a nozzle for the liquid to be atomized and a Cylinder with a piston movable therein,</li><li>a cavity within the cylinder prior to the flask via an intake is connected to the reservoir and, via a discharge duct with the nozzle,</li><li>a valve at least in the intake port, and</li><li>a drive device for the piston,</li></ul>in which<ul><li>the drive device comprises a mechanical energy storage, the outside the storage container is arranged, and the force exerted by the energy storage power on the piston acts, and</li><li>a device for manually feeding mechnaischer energy in the energy storage, and</li><li>the nozzle is a swirl nozzle, the flowing through the nozzle a liquid Circulation issued.</li></ul>

The swirl nozzle can be formed as a volute and a swirl chamber included, in which the liquid is introduced tangentially to the inner wall. The liquid emerges from the nozzle by a nozzle channel at the center of the vortex chamber is. The mean inside diameter of the vortex chamber is greater than the diameter of the outlet channel. This swirl nozzle is between the direction of the vortex chamber introduced liquid and the direction of leaving the nozzle the atomized Beam, an angle of about 90 degrees.

In another embodiment, the swirl nozzle can be a cylindrical cavity included, in which a cylindrical Kürper is present. In the space between the outer side of the cylindrical body and the inside of the cavity of the swirl nozzle is a guide device in the form of a helix present. The liquid is parallel to the axis introduced this swirl nozzle. The liquid obtained through the guide device circulation. The liquid exits through a nozzle channel, the TO the axis of the swirl nozzle located. This swirl nozzle which is the Austrittsrichrung Liquid parallel to Eintrittsrichtun the liquid. The guiding device consists of a helically wound web, which is preferably on the outer surface of the cylindrical Body is mounted, and on the inner wall of the cylindrical cavity tight manner. The web may take the form of a catchy or more threaded screw have.

Of the nozzle channel of the swirl nozzle can have a diameter of 30 micrometers to 300 have micrometers, preferably from 50 microns to 150 microns. The nozzle channel can be of 10 microns to 1000 microns in length, preferably from 50 microns to 300 micrometers. The average inner diameter of the swirl chamber in the swirl nozzle or the diameter of the cylindrical cavity of the swirl nozzle can be two to ten times - two and a half times to five times preferably - be as large as the diameter of the Nozzle channel.

The drive device for the piston comprising a store for mechanical Energy. The energy storage device may be a spring, preferably a helical spring or a plate spring which acts as a compression spring. These springs can be made of metal or of Plastic. Next, a gas spring is suitable, preferably a hermetically closed bellows gas spring.

These springs can optionally biased during installation in the atomiser will. The coil spring and the plate spring are later to the predetermined spring tension brought. The gas spring is compressed later to the desired gas pressure.

The spring is loaded manually. The spring stores as a working spring, the energy for displacing the piston within the cylinder for the purpose of discharging and atomizing the liquid is required.

To tension the working spring, the piston may be provided with a rod of the housing projects. When the rod by means of a handle a given piece of is manually pulled out of the housing, at the same time the working spring is tensioned, the piston is pulled further out of the cylinder, and in the space inside the Cylinder liquid is sucked from the reservoir.

Further, the work can spring by pushing together of the housing, optionally be with only one hand, excited when the housing consists of two parts, the are connected to each other and mounted displaceably against each other in the axial direction.

If the tensioning of the working spring manually applied force is too large, the housing of the sprayer consist of two parts which are interconnected and are mounted rotatable against each other. The drive device may be a screw-type thrust transmission comprise about the Energispeicher the required mechanical energy is supplied manually. For this purpose the two housing parts are manually up to today turned. About the screw sliding gear transmission working spring is tensioned. For this is due the power transmission force required is less than the force pulling out is attached to the piston rod in the axial direction is required.

The energy stored in the power spring energy exerts on the subset of liquid within the cylinder a pressure which from 0.5 MPa to 5 MPa (5 bar to 50 bar) is preferably from 2 MPa to 3 MPa (20 bar to 30 bar).

The drive device can be provided with a locking mechanism that a Blocking element and a release button comprising a body and the piston after the tensioning Working spring holds in a predetermined position. Thus, between the manual Tensioning the operating spring and the initiation of the sputtering process by manually Pressing the shutter button elapse a period. During this time period, the atomizer from the situation, the most favorable for the manual tensioning of the working spring is brought into the position that the nebulizer during the sputtering process should occupy.

The drive apparatus with locking mechanism may be formed as a locking mechanism be that automatically jumps to the OFF state as soon as the piston during the clamping process of the working spring has reached a predetermined position.

In a drive device without locking mechanism, the sputtering includes time directly to the clamping operation of the working spring on if the Discharge passage for the liquid, no valve or an automatically operating valve is available. The action of a drive device with locking mechanism may also be achieved if in the discharge channel a manually openable for the liquid a is available valve.

The atomizer contains at least one in the intake duct, a valve, preferably automatically operating valve. This valve opens at a slight vacuum, as soon as the piston is pulled out of the cylinder during the clamping of the working spring. This valve closes when the piston by the working spring in the cylinder is pressed and the sputtering begins. This valve verhinder the DerFlüssigkeit flowing back into the reservoir during the sputtering process.

In the discharge channel may be provided a further valve, if at a relatively large cross section of the nozzle channel in the swirl nozzle during the suction of Liquid from the reservoir simultaneously sucked air through the discharge channel becomes. This valve may be an automatically operating valve, the air Ansuagen prevented by the swirl nozzle. The valve opens when the piston with the Ejecting the liquid through the ejection channel begins.

The valve in the exhaust duct may be a non-automatic valve that by the maximum erzeugten- by the piston pressure is not opened, but only when manual actuation opens. Such a valve in the discharge channel has a similar effect on the handling of the atomizer, such as a locking mechanism in the drive apparatus. In this embodiment, the liquid contained in the cylinder between two can atomized clamping operations of the working spring in several smaller amounts successively will. For this, the valve in the discharge channel is operated several times in succession. Of the Users can thus at each actuation of the valve in the discharge passage atomized amount adjust the liquid to the current demand in a simple manner. The working spring is stretched at the latest as soon as the liquid in the cylinder completely has been expelled. However, the power spring can be tensioned already again, before the liquid in the cylinder has been fully discharged.

In a further embodiment of the atomizer of travel of the piston can be shorter be as the path to the working spring is compressed during tightening. there pushes the piston when pulling to a stop before the work in spring predetermined manner is compressed. In the tensioned state of the working spring is located between the movable end of the spring work and the outside of the Piston a clearance. Starting this spring work working spring exerts on the Piston a shock as soon as the movable end of the spring working on the outside the piston rests. Thus, the liquid in the cylinder a pressure surge be exercised.

In a nebulizer of the discharge duct with an automatically operated valve is provided, the locking mechanism may be provided with a stop device that the Movement of the piston one or more times continues, as soon as the piston has a predetermined path has completed and before the whole contained in the cylinder Liquid has been ejected. Thus, the liquid contained in the cylinder may in successively discharged and atomized more reproducible and adjustable parts will. A device provided with this sprayer can be between two clamping operations the working spring be actuated several times. The stopping device, the Movement of the piston to pre-set and can not be changed later holding positions of the piston. On the other hand, the stopping device from the outside adjustable and be able to operate. Then, the positions of the piston, from where it can the stopping device is stopped, be subsequently adjusted and changed.

To the extracted from the reservoir portion of the liquid under pressure to set, a device with a movable bellows can further be used. The bellows is elongated by a pulling force, whereby an increase in volume and from the Reservoir part of the liquid via an intake and an automatic acting valve is sucked. Upon compression of the bellows in the longitudinal direction is the pressure on the liquid contained therein is increased until the ejection channel in the existing automatic spring valve opens and the liquid through a nozzle is discharged and atomized.

As atomizing nozzle is a further single-nozzle with a single nozzle channel, optionally with an attached impact body upstream of the nozzle, or a multi-jet nozzle suitable multi-collimated or with intersecting liquid radiation.

The single-jet nozzle comprises a single nozzle channel of a (hydraulic) Diameter of 10 micrometers to 200 micrometers, and from 20 microns to 1000 microns long.

The multi-beam nozzle may include a plurality of nozzle channels, whose axes are parallel may extend to one another. This allows the predetermined at a time to be atomized Amount of liquid can be increased. Further characterized the cross-sectional area of ​​the atomised jet to be increased or the shape of the spray pattern can be connected to a predetermined shape to be adapted. The (hydraulic) diameter of the nozzle channels may be the same in all channels of a multi-channel nozzle and from 10 micrometers to be 200 microns, with a channel length respectively of 20 microns to 1000 Micrometers. On the other hand, it may be expedient for the channels of a multi-jet nozzle to choose different diameters.

Next, the multi-jet nozzle at least two mutually inclined nozzle channels included, which direct the liquid jets at a point in front of the outside of the nozzle, in which the fluid jets collide. The angle between two inclined Jets of liquid may be from 30 degrees to 120 degrees. By the impact of several can successive jets of liquid atomization are promoted. The (hydraulic) Diameter of the nozzle channels of a two-jet nozzle is preferably below 180 Micrometers, more preferably from 70 microns to 100 microns, at a Channel length respectively of 20 microns to 1000 microns.

Before the nozzle orifice can be a at a distance of 0.1 millimeters to 5 millimeters be mounted baffle, on the impacts of the liquid jet. As a baffle preferably a sphere or a hemisphere suitable which have a diameter of 0.1 Millimeter to 2 millimeters has. In one hemisphere of the liquid jet collides preferred on the convex side. Further, a baffle plate or a baffle cone are used, wherein the liquid jet, for example, perpendicular to the baffle plate or on the tip of the baffle cone impinges. An impact body can promote the atomization of the liquid. Further, a substantially annular spray pattern can be generated by a baffle will. The direction of the atomised jet can against the axis of the nozzle channel be inclined, if not yet atomized jet at an angle to the baffle plate impacts. In case of several parallel nozzles arranged channels, it may suitably be to provide one or more baffles, which shape and size of the atomized Beam and the direction of the atomised jet can be influenced.

The baffle body may by means of at least one fastening element to the housing be mounted the atomizer. When fasteners are a stiff wire or rod suitable. Further, it may by means of two or three mounting elements on the housing be attached. If the length of the fastening elements is variable, the distance of the collision member from the outside of the nozzle to be changed.

The occurring at the atomizer according to the invention in the nozzle channel mass flow is less than 0.4 grams per second. , the average droplet diameter less than 50 microns.

The atomizer according to the invention has the following advantages:<ul><li>The end of the sputtering process, the mass flow of liquid through the Nozzle duct and the droplet size distribution are independent of the finger strength, the user applies when tensioning the operating spring. These features are determined by the construction of the atomizer and complied reproducible.</li><li>For the atomization of the liquid, no alcohol or other volatile is Hydrocarbon compound requires.</li><li>The exiting from the atomizer jet contains as gas content only from Ambient air entrained.</li><li>The droplet size distribution and the mass flow of from the atomizer discharging liquid yield an atomized liquid jet which for the Depositing the droplets on an atomized from the liquid jet Surface made is suitable.</li><li>It can be produced in different versions and intended to Usage and be adapted to the best practice.</li></ul>

The atomizer according to the invention is to the figures by way of example in more detail explained.

Figure 1 is a schematic longitudinal section through an atomiser. As for the memory mechanical energy (power spring) is a helical spring is provided, which by means of a mounted outside of the housing by pulling the handle of the handle can be charged manually. In the rod that connects the handle with the piston, a notch is provided in the end of the tensioning operation of the coil spring a engages (spring-loaded) bolt, whereby the rod in the position reached is maintained. By pulling the pin out of the notch of the atomizing process is initiated. As a reservoir for the liquid, a collapsible bag has been selected. is shown in FIG. 1 the state of the atomizer shown in an intermediate stage, the up to between the a first stop from the case withdrawn plunger and to a second stop is in the cylinder piston pushed back. In the illustrated State abuts the coil spring from the liquid from the nozzle.

The housing (1) made of a rigid material includes a cavity (2), in which a prestressed coil spring (6) is housed. The coil spring is supported at its one end on the bottom of the cavity (2) and presses at the other end to the Piston (3). The thinner part of the piston (3) is mounted displaceably in the cylinder and sealed against the cylinder wall. Before the thin end of the piston is located within the cylinder of the cavity (4), can be sucked into the liquid. Of the Cavity (4) to the intake passage (11) with the reservoir (10) for the atomized connected. In intake duct is an automatically operating spring-loaded suction valve (13) is present, by when aspirating the liquid from the reservoir can flow into the cavity (4). The reservoir is a collapsible bag housed in said cavity (15) within the Gehäsues (1) is. The sealed with a lid cavity (15) is provided with an opening (27), by at decreasing volume of the collapsible bag for the purpose of equalizing the can flow pressure differential air from the environment. The cavity (4) is about the discharge channel (21) connected to the nozzle (22). The discharge passage includes a spring-loaded valve (23) which opens as soon as the front of the valve to be atomized Liquid with a sufficient pressure is applied. The piston (3) is at its thicker end to the rod (31) which passes through the coil spring through and protrudes from the bottom of the housing. At the end of the rod (31) is a handle (32) provided, with the piston a predetermined distance from the cylinder manually can be pulled out, at the same time, the coil spring is tensioned. At the Bottom of the housing is a bolt (33) is provided, which the rod (31) and thus the holds piston in a predetermined position when the piston is correspondingly far from has been pulled out of the housing.

To re-tensioning of the coil spring, the rod (31) and with the rod pulled associated piston at the handle (32) until the bolt (33) in a notch (34) engages. By pulling back the plunger (3) of the chamber (4) is within the Cylinder increases. From the storage container (10) when the valve (13) the intake duct (11) in the liquid space (4) is sucked. The case closed valve (23) prevents the suction of air into the space (4).

In place of the handle (32), the rod (31) by means of an externally accessible and retracted manually operated lever, the spring tensioned and the chamber (4) is filled with liquid. After releasing the lever presses the tensioned spring immediately the liquid from the chamber (4) through the nozzle (22) and atomizes the liquid. For this purpose, neither the bolt (35) or the notch (34) is required. At this Actuation the atomiser behaves similar to a hand-operated pump sprayer (Finger pump). The liquid contained in the space (4) within the cylinder acting pressure at the atomizer according to the invention, however, strained by the Spring created, the user has no influence.

Fig. 2 shows a schematic longitudinal section through another embodiment of the Atomizer. In this embodiment, the valve in the discharge channel does not open automatically for sufficiently large fluid pressure upstream of the valve. To trigger the Atomization the valve in the discharge channel - preferably by depressing - manually operated. Also in Fig. 2 is the state of the atomizer in an intermediate stage shown, the drawn-out between the up to a first stop of the housing and the pushed-piston to a second stop in the cylinder Piston is.

This atomizer is similar to the nebulizer shown in Fig. 1 constructed, it has However, no bolt (33) and no notch (34). Instead of automatically opening Valve (23) in this embodiment is a manually openable valve (42) in the discharge channel provided. This atomiser is operated in two steps. First, by Pulling out the rod (31) the spring (6) tensioned. Simultaneously, the space (41) is reacted with from the storage container (10) sucked liquid. In the illustrated state, pushes the helical spring against the liquid, the valve (42) as long as this closed is. As soon as and as long as the valve (42), for example, by pressing down the Release button (46) is manually opened and is kept open, the liquid flows by those in the release button (46) mounted nozzle (45) and is atomized. In this Atomizer, the user between the tensioning of the spring and thus contiguous run operations on the one hand and pressing the shutter button (46) to expire a time. The user's attention can be sheltered on the direct deposition of the atomized liquid on a surface to be treated.

Fig. 3 shows a schematic longitudinal section through a nebulizer, the intermediate two tensioning operations of the spring can be pressed twice, and the inside of the Cylinder existing ejects liquid into two subsets and atomized. The one with the Piston (3) connected rod (31) (34) and (35) provided with two notches that a predetermined distance from each other. These notches are preferably sawtooth formed, the oblique flanks of the notches are - from the handle (32) viewed from - looking behind the perpendicular to the axis of the rod (31) edges. The bolt (33) for example, a sawtooth-shaped end. The bolt (33) slides when pulling out the Rod over the notch (34) away and locks only in the notch (35). As soon as the pulled spring loaded pin from the notch (35) manually and immediately is released, the spring (6) located on the inside of the cylinder Liquid, pushing the first portion of the liquid through the automatic working Valve (23) to the nozzle (22), in front of the emerging liquid is atomized. This first Operation is terminated as soon as the bolt (33) engages in the notch (34). The second operation is analogous to the first operation. The second process starts as soon as the bolt (33) is pulled out manually from said notch (34); it ends when the piston changes its has reached the end position.

Fig. 4 shows a longitudinal section through an atomiser with a spring working as Store for the mechanical energy. The working spring is by means of a locking mechanism, which contains a screw-type thrust transmission, rotatable by rotating the two tensioned interconnected parts of the housing manually. The atomising is triggered by pressing a release button for a catch. Fig. 4 represents the State of the atomizer in already strained helical spring and latched pawl and completely filled with fluid chamber within the cylinder prior to the initiation the sputtering process by pressing a release button is.

The atomizer has a cylindrically shaped housing. The lower housing part (51) is rotatably connected by means of a snap connection with the upper part (52) of the atomizer. The upper part includes a cylinder (53) and a nozzle (60). The top is a removable protective cap (54). By rotating the cap (54) and the resulting connected to the upper part (52) of the atomizer is the in the lower housing part (51) axially displaceably mounted component (55) containing the piston (81), by means of a Screw-type thrust transmission from the cylinder (53) is pushed away until a component (55) Inappropriate pawl (74) jumps behind a projection in the lower housing part (51). Here, the space (57) is increased within the cylinder. Simultaneously, a part of the Liquid (64) of which is designed as collapsible bag reservoir (63) through the channel (68) in the hollow piston (81) into the space (57) is sucked, and the coil spring (59) is tensioned. In the channel which connects the space (57) with the nozzle (60) is a automatically operating valve is provided, which from a loaded with a spring (71) Ball (70). This valve prevents the ingress of air into the space (57) during aspiration of liquid and allows the space (57) with bubbles fill liquid. At the end of the hollow piston (81) located within the cylinder (53), a valve is mounted, the loaded from a with the spring (62) ball (61). The spring (62) is pressed by an end of the hollow piston in the Stoppers held in place. The plug is provided with a channel through which the Liquid flows into the space (57). The upper edge (56) of the plug may seal as of the piston (81) against the cylinder (53) act. The valve at the inner end of the Hollow piston opens automatically when liquid is drawn and is in closed discharging the liquid from the nozzle.

For sputtering of the chamber (57) within the cylinder contained liquid the protective cap (54) is removed, and mounted in the lower housing part release button (58) is manually actuated, wherein the locking pawl (74) is disengaged. The tensioned coil spring (59) now sets the liquid in the chamber (57) contained under Pressure. This makes the mounted in front of the nozzle valve opens automatically, the Liquid in the space (57) is expelled and atomized by the nozzle (60). During the ejection of the liquid that is attached to the end of the hollow piston Valve is closed, whereby the back flow of liquid from the space (57) in the Reservoir (63) is prevented. After the spraying is completed, the The protective cap (54) placed back to the upper part of the atomizer.

operating in place of the release button (58), the pawl (74) and automatically Valve with a ball (70) and spring (71) (analogous to the illustration in FIG. 2) a Release button may be present, including the spray nozzle, and with the press manually opens the valve upstream of the nozzle. This shutter button is at the top of Atomizer attached.

Instead of the collapsible bag (63), a non-deformable closed Containers are used, which, as well as with an automatically operating ventilating valve with a projecting into the tank dip tube, optionally in the form of a Coil, is provided.

The seal of the hollow piston to the cylinder by means of the upper edge (56) of Plug can be replaced by an O-ring in a groove in the lower end of the cylinder is mounted at the point (80).

In a further embodiment of the sprayer, the the hollow piston containing component (55) to be connected to the lower housing part, and the cylinder with the space (57) can relative to the lower housing part (51) in the axial direction be arranged to be movable.

For ease of handling of the nebulizer, a polydentate pawl be provided, which is constantly engaged on tensioning the helical spring.

If for tensioning the coil spring a relatively large force is required, a screw-type thrust transmission are used, which are rotated more than 360 degrees can. This allows the tensioning of the coil spring by rotating the two played Decrease manually applied force is sufficiently far removed housing parts.

Fig. 5 shows a cross section through a nozzle with external mounted upstream of the nozzle Ball as a baffle. The liquid under pressure is out of the nozzle opening (104) ejected in the form of a closed beam (102) on an impact body (106) impacts. The liquid passes into the atomized jet (107).

Fig. 6 shows a cross section through a die having two mutually inclined Nozzle channels. The two beaten out of the nozzle liquid jets collide outside the nozzle to each other. The liquid under pressure is out of the two Orifices (108) and (109) in the form of two closed-rays (110) a nd (111) pushed out. Both beams collide at the point (112). Here is the Liquid in the atomized jet (113) above.

In Fig. 7, a swirl nozzle is shown in the form of a whirl. Fig. 7 shows a the whirl in the view of its inside with the cover plate removed. Fig. 7 shows a longitudinal section through the whirl along the line A - A in Fig. 7 A and parallel to the nozzle axis. In Fig. 7 c of the area around the nozzle channel is enlarged.

In the whirl (121) of the nozzle channel (122) in the axis of the arranged whirl, which is liquid to be sprayed by example three channels (123) tangentially directed into the vortex chamber (124). The axes of the channels (123) run past the axis of the nozzle channel. The channels (123) are compared to the Nozzle channel (122) is enlarged. The cover plate (125) for the swirl chamber and the Channels contains in the region of the outer end of the channels (123) each have an opening (126) through which the liquid enters the channels (123).