Atomizer nozzle

Abstract

An atomizer nozzle for atomizing a fluid, in particular a liquid, including a nozzle opening, a spinning chamber and at least one delivery channel for feeding the fluid into the spinning chamber, at least one delivery channel extending into the spinning chamber via at least one inlet. The spinning chamber has a curved base which is curved away from the nozzle opening, and at least one delivery channel is oriented towards the base.

Claims

1. An atomizer nozzle for atomizing a fluid, having a nozzle opening, a rotation chamber and one or more supply channels for supplying fluid into the rotation chamber, wherein one supply channel of the one or more supply channels opens into the rotation chamber via one or more inlet openings, wherein the rotation chamber has a curved floor, wherein the floor is curved away from the nozzle opening, wherein an edge of the floor spans a plane, wherein an entirety of the floor has a concave curvature in relation to the plane that the edge of the floor spans, wherein at least one supply channel of the one or more supply channels is directed in a direction toward the floor, wherein the at least one supply channel of the one or more supply channels is arranged at least in part tangentially to a curvature of the floor, wherein the rotation chamber has a conical profile at least in part, and wherein at least one inlet opening of the one or more inlet openings is arranged in a region of a greatest inside diameter of the rotation chamber.

2. The atomizer nozzle according to claim 1, wherein the rotation chamber broadens from the nozzle opening toward at least one inlet opening of the one or more inlet openings.

3. The atomizer nozzle according to claim 1, wherein the plane that the edge of the floor spans is arranged parallel to a plane that the nozzle opening spans.

4. The atomizer nozzle according to claim 1, wherein the at least one supply channel of the one or more supply channels extends at least in part obliquely to the plane that the edge of the floor spans.

5. The atomizer nozzle according to claim 1, wherein the atomizer nozzle is constructed to have at least two parts, the atomizer nozzle has a first floor part that has the floor and an opening part that has the nozzle opening, and the at least one supply channel of the one or more supply channels is formed in the first floor part.

6. The atomizer nozzle according to claim 5, wherein the at least one supply channel of the one or more supply channels is formed at least in part in the form of a passage in the first floor part.

7. The atomizer nozzle according to claim 1, wherein the atomizer nozzle has two conically tapering regions that are arranged between the plane that the edge of the floor spans and a plane that the nozzle opening spans, and the two conically tapering regions have different cone angles.

8. The atomizer nozzle according to claim 1, wherein the atomizer nozzle has one or more cylindrical regions and the one or more cylindrical regions are formed between the nozzle opening and a conically tapering region.

9. The atomizer nozzle according to claim 5, wherein the opening part is designed to have a symmetrical cylinder region, the nozzle opening is symmetrical, a center line of symmetry of the nozzle opening corresponds to a center line of symmetry of the symmetrical cylinder region of the opening part, the symmetrical cylinder region of the opening part is designed to accommodate the first floor part at least in part, and at least one gap is designed between the first floor part and the opening part for supplying liquid.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention is explained at greater length with reference to an exemplary embodiment shown in the drawing. In particular, the drawings show the following schematic representations:

(2) FIG. 1: a partially cut-away view of an atomizer nozzle;

(3) FIG. 2: a projection of the cross-section of an atomizer nozzle with two supply channels; and

(4) FIG. 3: a cut-away view of a two-part atomizer nozzle with an opening part and a floor part.

(5) FIG. 1 shows a longitudinal section of an atomizer nozzle 1 according to the invention with a nozzle opening 2 and a rotation chamber 3. Supply channels for supplying liquid into the rotation chamber 3 open into the rotation chamber 3 via inlet openings 4. The inner walls of the rotation chamber 3 have a conical progression from the nozzle opening 2 in the direction of the inlet opening 4, and the rotation chamber 3 broadens in this direction. The rotation chamber 3 has a curved floor 5 that connects to the conical region. The floor 5 has a convex curvature in relation to the plane that nozzle opening 2 spans; in other words, the curvature is directed away from the nozzle opening 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) The rotation chamber 3 has its greatest inside diameter between the floor region 5 and the conical region. The inlet opening 4 is arranged in this region. In a projection of the supply channels into the plane that the nozzle opening spans, the supply channels are arranged tangentially to the preferably circular cross-section of the rotation chamber 3. When a liquid, in particular water, is introduced, it is set in rotation in the rotation chamber 3 and accelerated toward the nozzle opening 2 by the convex curvature of the floor 5. When the rotating liquid emerges from the nozzle opening 2, the liquid is finely nebulized.

(7) FIG. 2 shows a projection of an atomizer nozzle 1 onto the cross-sectional plane of the rotation chamber 3 of the atomizer nozzle 1. In a projection into this plane, the supply channels 6, 7 are arranged tangentially to the rotationally symmetrical cross-section of the rotation chamber 3. The supply channels 6, 7 open into the rotation chamber 3 via inlet openings 4, 8. In the projection, the flow direction of the liquid in the two supply channels 6, 7 is directed in the opposite direction, so that the direction of rotation of the liquid is supported by both supply channels 6, 7. The inlet openings 4, 8 are arranged at a distance of a half-circumference of the rotation chamber 3 from each other.

(8) FIG. 3 shows a two-part atomizer nozzle 1 having a floor part 9 and an opening part 10. The opening part 10 has a nozzle opening 2, from which a cylindrical, sleeve-shaped region 11 branches off. The cylindrical region 11 connects to a first conical region 12 that transitions into a second conical region 13. The rotation chamber 3 is formed by the first conical region 12 and the second region 13. With respect to the plane that the nozzle opening 2 spans, the first conical region 12 has a smaller angle of inclination than the second conical region 13.

(9) The second conical region 13 connects to the floor 5. The floor 5 is formed by a curved recess in the floor part 9. The radius at the greatest inside diameter of the rotation chamber 3 corresponds to the radius of the recess that forms the floor 5. At least one supply channel 6, 7 is formed in the floor part 9 for example by a passage. The supply channel 6 is for example formed by a bore in the floor part 9, with the bore being arranged at the end face of the substantially cylindrical floor part. The supply channels 6, 7 are directed toward the floor 5 and fit snugly against the curvature of the floor 5 as a result of being arranged tangentially to the curvature of the floor 5. The inlet openings 4, 8 are arranged facing toward the floor 5. In addition, the supply channels 6, 7 run tangentially to the circular cross-section of the rotation chamber 3, at least in one projection onto the plane that the edge of the base 5 of the rotation chamber 3 spans. The supply channels 6, 7 thus run obliquely to the plane that the edge of the base 5 spans. A liquid introduced into the rotation chamber 3 through the supply channels 6, 7 is thus directed in the direction of the nozzle opening, along the curved floor 5 and the inner wall of the rotation chamber 3. The rotationally symmetrical design of the rotation chamber 3 sets the liquid in rotation. The opening part 10 has a sleeve-shaped section 14 in which the floor part 9 is accommodated. The floor part 9 is substantially cylindrical. A gap 15 is formed between the outer walls of the floor part 9 and the walls of the sleeve-shaped region 14 of the opening part. The liquid to be atomized may penetrate through the gap 15 into the supply channel 6 and thus into the rotation chamber 3.

(10) Any and all of the features mentioned in the above description and in the claims may be selected and combined with the features of the independent claim. The disclosure of the invention is therefore not limited to the described or claimed combinations of features; rather, all feature combinations that are useful in the context of the invention should be deemed disclosed.