TW201825697A - Aerosol evaporator - Google Patents

Abstract

The invention relates to a device for providing a vapour which is transported in a carrier gas stream and is produced by evaporating liquid or solid particles, in particular of an aerosol or suspension, said device having at least one feed line (2) which opens in a housing (1) at a distance (a) in front of an end face (17') of an evaporation element (17) having heated heat exchange surfaces, to feed a stream of the aerosol or suspension in the direction of an axis (A) of the opening (5) of the feed line (2) onto the end face (17). To increase efficiency, an impact element (15) which has one or more impact surfaces (11, 12, 24) is provided between the opening (5) and the end face (17), wherein the rotationally symmetrical impact surfaces (11, 12, 24) are oriented at an angle ([alpha], [beta]) greater than 10 degrees and less than 80 degrees to the axis (A).

Description

   Aerosol evaporator   

The invention relates to a device for providing steam transported in a carrier gas stream, wherein the steam is generated by evaporating liquid or solid particles of an aerosol. An evaporation element having a heated heat transfer surface is provided in the housing. A conveying pipe for transporting the aerosol flow is communicated with the casing. There is a distance between the outlet of the delivery pipe and the end side of the evaporation element. The axis passing through the exit is substantially perpendicular to the end side. As an alternative to the aerosol, the suspension can also be sent through the delivery tube to the evaporation element.

DE 10 2014 109 194 A1 describes a device of the same type having a housing with a substantially square cross section. A conveying pipe for feeding aerosol into the housing communicates with the top of the housing, wherein the outlet of the conveying pipe is inserted into a preheatable element that can be electrically heated. A flushing air is communicated in the distribution cavity upstream of the preheating element, and the flushing air passes through the porous preheating element and flows into the gap arranged downstream of the preheating element. One or more ducts also communicate with this gap. An evaporation element is provided at a distance from the exit surface of the preheating element, and the heat transfer surface of the evaporation element is electrically heated to the evaporation temperature. The aerosol output from the outlet of the delivery pipe forms a particle beam. The particle beam encounters the evaporation element in the cone beam, and the base surface of the cone beam is much smaller than the area on the end side of the evaporation element. Therefore, the aerosol particles are essentially evaporated only in the area of the cone beam. The evaporation element is no longer supplied with heat of evaporation there, so that the evaporation element is greatly cooled there. There are several evaporation elements arranged one after another along the flow direction.

It is known from the prior art, in particular from DE 10 2010 000 388 A1, to use an impact element in an air intake mechanism in order to distribute the gas evenly.

WO 2012/175124 A1 also describes a device of the same type, in which a jet of carrier gas transporting an aerosol is directed towards the end face of the evaporation element.

A gas distributor is known from US 2002/0020767 A1, in which gas is fed into a gas distribution chamber by means of a feed tube. There is an impact plate in front of the outlet of the pipeline. The impact plate is separated from each other by a partition plate having a plurality of mesh-shaped openings.

DE 10 2011 051 261 A1 describes a device for depositing an organic layer on a substrate.

DE 196 54 321 A1 describes an aerosol generator in which an aerosol flows towards an impact plate device.

The purpose of the present invention is to improve the same type of device to facilitate its use, especially to increase the evaporation power of the device.

This objective is achieved through the invention given in the scope of patent application, in which the subsidiary item is not only an advantageous improvement solution of the invention given by the independent item, but also an original solution for this purpose.

The invention first and essentially proposes an impact element which is arranged in an axis between the outlet of the delivery tube and the end side of the evaporation element. The evaporation element has one or more impact surfaces, which are located in the cone of the aerosol flow, that is, in the axis of the exit. Aerosol particles with a typical diameter in the range of 10 μm to 500 μm, for example 50 μm, are discharged in pulses from the outlet of a transport tube, which is substantially parallel to the axis. In addition to the aerosol, the suspension can also be discharged from the outlet of the delivery tube in order to be evaporated in an evaporation element arranged downstream in the flow direction. During the period when the carrier gas follows the laws of fluid dynamics and is distributed in a gap between the outlet and the end side in a manner that forms a vortex, the aerosol particles essentially move on the trajectory of the ballistic movement and hit the impact surface. The aerosol particles are reflected on the impact surface, and the reflection exit angle is approximately equivalent to the reflection incidence angle. The impact surface is inclined at an angle to the axis, in particular, several impact surfaces inclined at different angles to the axis can be arranged side by side in the radial direction and / or successively arranged in the axis direction. The impact surface is preferably arranged and selected at an angle to the axis, so that the particles are distributed over the entire end side by reflection and especially by a velocity or motion component that deviates from the end side. The reflected particles preferably move on an arc track that is at least jointly affected by a carrier gas stream passing through the gap between the outlet and the end side, wherein the carrier gas stream preferably surrounds at least one of the at least one duct Outlet uniform flow. The impact element preferably has a rotationally symmetrical design, wherein the impact element is preferably arranged in the gap so that its rotation axis is located in the axis of the outlet of the conveying pipe. The impact element may be placed on the end side of the evaporation element. The impact element may also be spaced from the end side. The shape of the one or more impact surfaces may be a conical surface or a truncated conical surface. The contour surface of the impact element is preferably larger than the contour surface of the exit. The size of the contour surface of the impact element in a plane transverse to the axis is at least twice, preferably at least five times, the contour plane of the outlet of the delivery pipe transverse to the axis. In a particularly preferred design, the impact element consists of two coaxial conical or truncated conical surfaces arranged one behind the other in the axial direction. The first impact surface extends along the side of the cone, wherein the side of the cone forms an angle with the axis in a range of 20 to 30 degrees. The second impact surface is connected to the first impact surface in such a manner as to form an annular boundary line or a boundary area. The second impact surface extends radially outside the first impact surface and forms an angle of 60 degrees to 85 degrees with the axis. The device may have several delivery tubes whose ends lie in the same plane. A preheating element composed of a solid foam body may be arranged in a plane for extending one or more outlet pipes or outlets, and a carrier gas may pass through the preheating element. The conductive solid foam is heated by energizing, so that the temperature of the carrier gas passing through the solid foam rises, and the carrier gas flows into the gap at the temperature at the periphery of the outlet of the delivery pipe. Particles that flow into the gap from the exit axis in the axial direction hit the two impact surfaces and are reflected at different exit angles. Among them, particles reflected by the first impact surface can also be reflected twice by the second impact surface. The arrangement of the impact element and the direction of the impact surface are selected so that the aerosol particles reflected on the impact surface hit the end side of the evaporation element with a substantially uniform surface distribution, so that the heat transfer surface is not only in the cone beam area, Heat transfer is also performed substantially across the entire cross-section of the evaporation element. In addition, at least the central portion of the impact element near the axis is shaped so that aerosol particles cannot be reflected back into the delivery tube. In order to distribute the particles to be evaporated evenly and substantially on the entire surface of the evaporation element, according to the measures of the present invention, particles, especially high-speed particles, that are emitted from the outlet in a bundle are prevented from passing through the evaporation without being evaporated. The element may pass through several evaporation elements arranged one after another along the flow direction. According to a modification of the invention, the impact element is heated actively or passively. This solution prevents steam from condensing on the impact surface. Therefore, the temperature in the latter solution is higher than the evaporation temperature of the particles of the suspension or aerosol.

The gap may define a distance of 10 mm to 30 mm between an outlet of the duct or an exhaust surface of the preheating element and an end side of the evaporation element. The distance between the exit of the duct or the preheating element surrounding the exit and the end side of the evaporation element is greater than the diameter of the impact element. However, the distance is preferably less than twice the diameter of the impact element. The outlet end of the delivery pipe can be arranged in an insulating sleeve which is inserted into the opening of the preheating element. The outlet opening of the conveying pipe may be flush with the end surface of the preheating element that faces the evaporation element. However, the exit may also protrude from the end face or be indented to form a recess.

In an alternative design scheme, the impact element used and arranged in the above scheme has a non-rotationally symmetrical design. The rotationally symmetrical impact element, which is also the subject of the present invention, has impact surfaces arranged one after the other in the axial direction of the figure axis, wherein the impact surfaces can be adjacent to each other, but are also spaced apart from each other in the axial direction. To make the two impact surfaces axially spaced, the impact element may have a cylindrical section containing a cylindrical side. In particular, the third impact surface which can have the same inclination angle as the second impact surface and the second impact surface are spaced apart from each other in the axial direction. The inclined third impact surface may directly abut the end side of the evaporation element. However, a cylindrical support is also adjacent to the end side of the evaporation element, and the support transitions to the second or third impact surface in the manner of forming a bend or round, and the impact surface can also form a bend or round In this way, other impact surfaces or cylindrical sides are connected. Non-rotationally symmetric impact elements can in principle have the same structure. However, the conical or truncated conical surface does not have any circular base surface, but instead has an oval, olive or polygonal base surface. The graphic axis of the impact element may intersect perpendicularly with the base surface, but likewise, the graphic axis of the impact element intersects with a round, elliptical, olive or polygonal base surface at an angle. In the case that the impact element adopts such a design scheme, the graphic axis of the impact element makes an angle with the axis of the outlet of the conveying pipe. According to the invention, the graphic axis of the impact element coincides with the central axis of the outlet of the conveying pipe. In addition to the central arrangement of the impact element with respect to the conveying pipe, the impact element may also be arranged eccentrically with respect to the conveying pipe. The graphic axis of the impact element is offset from the central axis of the exit. In an improved solution of the present invention, several outlets of a duct for aerosol communicate with the gap toward the end side of the evaporation element, wherein each outlet corresponds to an impact element, and the impact element makes the The aerosol discharged from the exit is diverted. As far as the central axis of the exit is concerned, the impact element can also adopt a central or eccentric arrangement. The impact element can also have a rotationally symmetrical or non-rotationally symmetrical design. In an improved solution of the present invention, the end surface of the evaporation element is formed with several, especially four, sections of the same size and the same design, wherein each section corresponds to a conveying pipe. The impact element is preferably axially offset from each center of the partition. However, these impact elements can also be offset axially from the outlet. As far as the center point of the end side is concerned, the axial deviation can be in a direction away from the center point or in a direction toward the center point. It is preferred that all impact elements adopt a symmetrical staggered design scheme or layout scheme with respect to the center point of the end side.

1‧‧‧shell

2‧‧‧ Duct, aerosol

3‧‧‧ delivery pipe, flushing gas

4‧‧‧ front room

5‧‧‧ export

6‧‧‧ sleeve

7‧‧‧ recess

8‧‧‧ Preheating element

9‧‧‧ clearance

10‧‧‧Impact element

11‧‧‧ the first impact surface

12‧‧‧Second impact surface

12'‧‧‧Intermediate impact surface

13‧‧‧Top

14‧‧‧ substrate

15‧‧‧ track

15'‧‧‧ Track

16‧‧‧ Track

16'‧‧‧Motion track

17‧‧‧Evaporation element

17'‧‧‧ End

18‧‧‧ evaporation element

19‧‧‧ evaporation element

20‧‧‧ cylindrical surface

20'‧‧‧ cylindrical surface

21‧‧‧ aerosol flow

22‧‧‧ flushing gas

23‧‧‧Steam stream

24‧‧‧ Third Impact Surface

a‧‧‧distance

A‧‧‧ axis

B‧‧‧ axis

D0‧‧‧ diameter

D1‧‧‧ diameter

D2‧‧‧ diameter

D3‧‧‧ diameter

H1‧‧‧ height

H2‧‧‧ height

H3‧‧‧ Height

H4‧‧‧ height

H5‧‧‧ height

t‧‧‧ partition

u‧‧‧ partition

v‧‧‧ partition

w‧‧‧ partition

α‧‧‧ inclination

β‧‧‧ angle

γ‧‧‧ corner

The present invention is described in detail below with reference to the examples. Among them: FIG. 1 is a schematic cross-sectional view of a gas source device for providing vapor transported in a carrier gas stream by vaporizing liquid or solid particles of aerosol, and FIG. 2 is a casing arranged in the gas source device FIG. 3 is a second embodiment of the view in FIG. 2, FIG. 4 is a third embodiment of the view in FIG. 2, and FIG. 5 is an impact member 10 relative to the conveying pipe 2. In other words, a schematic diagram of an eccentric arrangement scheme, FIG. 6 is a schematic diagram of an arrangement scheme of an impact element 10 having an axis B inclined to the axis A of the conveying pipe, and FIG. 7 is a plan view according to arrow 7 in FIG. FIG. 8 is a top view of the end side 17 'of the evaporation element 17. The evaporation element has four impact elements 10 arranged on the same size and the same design partitions t, u, v, w. These impact elements are respectively along the gas The flow direction of the sol is arranged in the conveying pipe 2.

The gas source device of the present invention is used in a coating device. The gas source device is used to coat a substrate, particularly a glass substrate having organic molecules, so as to manufacture an OLED display. In an aerosol generator not shown in the drawing, an aerosol stream 21 is made from a liquid or solid starting material through the delivery tube 2. The aerosol particles have an average diameter of about 50 m, and the aerosol particles are passed through the delivery tube under a decreasing pressure, wherein the pressure may be 1 mbar to 10 mbar.

The casing 1 of the gas source device surrounds an approximately cylindrical cavity, wherein the cavity preferably has a rectangular cross section. The duct 2 enters the housing in the region above the housing 1 and forms a hollow gun which is inserted at its end into the opening of the preheating element 8 which fills the entire cross section of the cavity of the housing. Only one delivery tube 2 is shown in this embodiment. However, it is also possible to provide several parallel conveying pipes.

The flushing gas 22 is fed into the pre-chamber 4 upstream of the preheating element 8 through the flushing gas delivery pipe 3. The preheating element 8 is composed of a conductive foam, which is described, for example, in WO 2012/175124 A1. The pre-heating element 8 is heated in an energized manner, thereby heating the flushing gas 22 passing through the pre-heating element 8. The outlet end of the conveying pipe 2 is inserted into an electrically insulating sleeve 6.

In the embodiment, the inner diameter D0 of the conveying pipe 2 is 5 mm. The exit of the exit end 2 is retracted relative to the downstream planar end face of the preheating element 8 so that the exit 5 through which the aerosol flow 21 passes and flows into the gap 9 is arranged in the recess 7.

The axis A extends perpendicular to the exhaust surface of the outlet 5, the axis passes through the center of the conveying pipe 2 and the distance a extending in the gap 9 is approximately 22 mm.

An end side 17 ′ of the first evaporation element 17 is arranged opposite to the downstream end side or the outlet 5 of the preheating element 8 in the flow direction or in the direction of the axis A. The evaporation element 17 is made of a conductive porous material, such as a foam, as other evaporation elements 18, 19 arranged downstream of the first evaporation element 17 in the flow direction, which is described in WO 2012/175124 Described. The air chamber walls of the foams of the evaporation elements 17, 18, and 19 can transmit evaporation heat to the heat transfer surface of the aerosol particles, and the evaporation heat is used to evaporate the aerosol particles into a vapor form. For this purpose, the evaporation elements 17, 18, 19, which can also be spaced slightly from each other in the direction of the axis A, are electrically heated. Electric heating can be adjusted independently in different evaporation elements.

An impact element 10 is arranged on the end side 17 ′ which points to the outlet 5, which end side preferably extends in a plane transverse to the axis A. The impact element has a graphic axis. The impact element is designed to be rotationally symmetrical. The graphics axis is in axis A. In the case where the device has several conveying pipes 2 each having an outlet 5, according to the present invention, an impact element 10 as shown in the drawings is arranged downstream of each outlet 5.

The impact element has a first impact surface 11 extending on a tapered surface. The top end 13 of the cone defining the conical surface is located in the axis A. The tapered surface 11 makes an angle α with the axis in the range of 20 to 30 degrees. The angle α is preferably about 25 to 27 degrees.

The first impact surface 11 constitutes a radially inner impact surface, which transitions to the second impact surface 12 in a manner to form an annular region. The radially outer second impact surface 12 extends on the side of the truncated cone. The distance between the second impact surface and the outlet 5 is greater than the distance between the first impact surface 11 and the outlet. The truncated cone defining the side of the truncated cone has a centerline that coincides with the axis A. The frustum side 12 forms an angle β with the axis A in the range of 60 degrees to 85 degrees, preferably in the range of about 78 degrees to 79 degrees. The inclination angle α formed by the first radial impact surface 11 and the axis A is beneficially smaller than the angle formed by the second radial impact surface 12 and the axis. In an embodiment not shown, the angle α may be an acute angle, and / or the angle β may be an obtuse angle. The angle α is particularly greater than zero and 45 degrees or less. The angle β is particularly 45 degrees or more and less than 90 degrees.

The height H1 of the cone defining the first impact surface is 6 mm. The diameter D1 of the tapered base surface is 6 mm. The truncated cone height H2 defining the truncated cone of the second impact surface 12 is 1.5 mm. The diameter D2 of the base surface of the truncated cone of the second impact surface 12 is about 15 mm.

The diameter D1 of the base surface of the first impact surface 11 is advantageously approximately equal to the diameter D0 of the outlet 5. The diameter D1 is particularly preferably slightly larger than the diameter D0.

The technical principle of the device is as follows:

An aerosol having an inert gas is transported through the conveying pipe 2 in the direction of the axis A. The duct 2 passes through the chamber 4 before being flushed by the flushing gas 22. The aerosol flow 21 passes through the outlet 5 into the gap 9. The purge gas 22 enters the gap 9 and forms a purge gas stream surrounding the aerosol flow when pre-heated by the preheating element 8, wherein the purge gas and the carrier gas may be the same gas. The aerosol particles transported by the carrier gas pass through the gap 9 substantially along the axis A direction on the approximately straight trajectories 15 and 15 ′ and impinge on the first and second impact surfaces 11 and 12 of the impact element 10. The sol particles are reflected there, where the exit angle corresponds approximately to the angle of incidence. The end side 17 ′ reflects the particles on the trajectory 15 that hit the second impact surface 12 which is highly inclined at an angle β to the axis, and the particles form an arc track 16 that is away from the axis A in the radial direction, so that The end side 17 ′ is hit at intervals, on which it is conveyed by a flushing air stream and is carried into the evaporation element 17 and is evaporated in this evaporation element.

The particles moving along the trajectory 15 'first hit the first impact surface 11 which is steeper to the axis A and is deflected there. The particles deflected on the impact surface 11 then either directly hit the end side 17 ′ of the evaporation element 17 or are reflected twice when they hit the second impact surface 12. The curved motion trajectory 16 ′ of the particles that are reflected twice is more gentle than the trajectory 16 of the particles that are reflected only once on the first impact surface.

The inclination of the impact surface makes it impossible to reflect the particles into the conveying pipe. In addition, measures are taken to heat the impact surface to a temperature such that steam does not condense on the impact surface.

According to the invention, particles are also reflected on the impact surfaces 11, 12 in such a way that the particles hit the shell wall of the shell 1.

The trajectories shown by dashed lines in the drawings only symbolically show the physical trajectories of particles. Depending on the diameter of the particles and the total pressure in the gap 9, the motion of the particles depends to a large extent on the flow profile of the flushing gas or carrier gas.

The embodiment shown in FIG. 3 shows an impact element 10 having impact surfaces 11, 12, 24 that are rotationally symmetric about a graphic axis B of the impact element 10. The first impact surface 11 extends at a cone angle α on a cone surface and has a tip end 13. The first impact surface 11 transitions to a second impact surface 12 spaced from the third impact surface 24 by forming a round or a fold line. The inclination angle β of the second impact surface 12 and the pattern axis B is approximately equivalent to the inclination angle γ of the third impact surface 24 and the pattern axis B. The height H3 of the cylindrical surface 20 disposed between the second impact surface 12 and the third impact surface 24 is greater than the height H2 of the second impact surface 12 and the height H4 of the third impact surface 24. The base surface on which the impact element 10 rests on the end side 17 ′ of the evaporation element 17 is here constituted by the base surface of another cylindrical section whose cylindrical surface 20 ′ is connected to the third impact surface 24. The height H5 of the cylindrical surface 20 ′ is greater than the height H4 of the third impact surface 24. The diameter D3 of the base surface of the impact element 10 corresponding to the base surface of the third impact surface 24 is larger than the diameter D2 of the cylindrical surface 20.

The embodiment shown in FIG. 4 is substantially different from the embodiment shown in FIG. 2 only in the following manner: the second impact surface 12 is not directly adjacent to the end side 17 ′ of the evaporation element 17, but a cylindrical section with a cylindrical surface 20 is connected to the second impact surface 12 such that, as in the embodiment shown in FIG. 3, the impact surface with the largest diameter is offset from the end side 17 ′ with respect to the axis B or the axis A.

FIG. 5 shows an embodiment which is different from the embodiment shown in FIG. 1 in that the graphic axis B of the impact element 10 is not located in the central axis A of the outlet 5. The graphic axis B parallel to the axis A is staggered from the axis A in the radial direction.

Fig. 6 shows another embodiment in which the impact element 10 does not have any rotationally symmetrical design. As far as the design axis B inclined to the axis A passing through the outlet 5 and passing through the top end 13 of the first impact surface 11, the first impact surface 11 may have rotational symmetry. As far as an axis that is not illustrated in FIG. 6 is parallel to the axis A, the first impact surface 11 is not rotationally symmetric. The base surface of the first impact surface 11 may be an oval or olive-shaped surface. On this base surface, the first impact surface 11 transitions to a middle impact surface 12 ′ in the form of a fold line or a round, which is on the tapered surface or a surface similar to the cone like the first impact surface 11. extend. The second impact surface 12, which is also not rotationally symmetrical, is connected to the intermediate impact surface 12 ′. The impact surfaces may be composed of a cylindrical side or a cone side, wherein the axes of the cone or the cylinder are inclined to each other.

FIG. 8 shows a plan view of the end side 17 ′ of the evaporation element 17. The end face of the end side 17 'is square and can be divided into four partitions t, u, v, w of the same size and the same design. The boundaries shown by dashed lines between the partitions t, u, v, and w intersect at the center point of the end side 17 '. As far as this central point is concerned, four outlets 5 of the conveying tube 2 are arranged in a quadruple symmetry, wherein each outlet 5 corresponds to an impact element 10. The impact element 10 may have an asymmetrical design and is not arranged symmetrically, in particular eccentrically, to the outlet 5. Preferably, it refers to an impact element 10 of the same design, which is arranged symmetrically with respect to the center point of the end side 17 '.

The foregoing embodiments are used to describe the inventions included in the present application as a whole, and these inventions independently constitute an improvement scheme relative to the prior art through at least the following feature combinations:

A device characterized by an impact element 10 arranged between an outlet 5 and an end side 17 ', the impact element having one or several impact surfaces 11, 12, 24.

A device is characterized in that the impact surfaces 11, 12, 24 are inclined with respect to the axis A at angles α, β, particularly greater than 10 degrees and less than 80 degrees.

A device is characterized in that the one or more impact surfaces 11, 12, 24 are rotationally symmetrical with the axis A.

A device is characterized in that the impact element 10 has two or more impact surfaces 11, 12 which are inclined to the axis A at mutually different angles α, β.

A device is characterized in that the impact surfaces 11, 12, 24 extend along a conical surface or a side of a truncated cone, wherein the conical base surface is a circular surface, an olive-shaped surface, or an elliptical surface.

A device characterized in that the size of the contour surface of the impact element 10 transverse to the axis A is at least twice, preferably at least five times, the plane of the outlet 5 transverse to the axis A.

A device, characterized in that the impact element 10 has a first radial impact surface 11 in the radial direction, the impact surface extends on a cone surface, wherein the top end 13 of the cone is located in the axis A and the cone surface is 20 degrees The angle α to 30 degrees is inclined to the axis A, and the impact element has a radially outer second impact surface 12, which is connected to the first impact surface 11 in the manner of forming an olive-shaped or circular broken line and is in a truncated cone Extending on the side, the side of the truncated cone forms an angle β of 60 degrees to 85 degrees with the axis A.

A device, characterized in that the end of the conveying pipe 2 having the outlet 5 is inserted into an opening of a heated preheating element 8, the preheating element 8 can be thoroughly flushed by a flushing gas 22, and the flushing gas enters the preheating The gap 9 between the element 8 and the evaporation element 17.

A device, characterized in that the distance (a) of the outlet (5) is one to two times the diameter (D2) of the impact element (10).

A device is characterized in that the design axis or graphic axis B of the impact element 10 is radially offset from the axis A passing through the center of the outlet 5.

A device is characterized in that the design axis or graphic axis B of the impact element 10 is offset from the axis A by a certain angle.

A device is characterized in that two impact surfaces 12 and 24 are separated by a cylindrical surface 20.

A device, characterized in that a plurality of transport pipes 2 are provided, which are particularly parallel to each other, and these transport pipes are staggered from the center z of the partitions t, u, v, w of the end 17 'of the evaporation element 17, wherein, Each outlet 5 corresponds to an impact element 10, wherein the impact element 10 has a non-rotationally symmetrical design and / or an eccentric arrangement with respect to the central axis A of the outlet 5 of the conveying pipe 2.

All the disclosed features (as a single feature or a combination of features) are the essence of the invention. Therefore, the disclosure content of this application also includes all the content disclosed in the related / attached priority files (copy of the previous application), and the features described in these files are also included in the scope of patent application of this application. The subsidiary items describe the features of the present invention's improvements to the prior art with their characteristics, and their main purpose is to make a divisional application based on these claims.

Claims (14)

    A device for generating steam, which has an aerosol generator for generating aerosols with liquid or solid particles, an evaporation element (17) with a heated heat transfer surface arranged in a housing (1), And a conveying pipe (2) for transporting the particles from the aerosol generator to the evaporation element (17) by a carrier gas flow, wherein an outlet (5) of the conveying pipe (2) and the evaporation element (17) The end side (17 ') of) is spaced and generates a particle flow along the axis (A) of the outlet (5) toward the end side (17'), which is characterized in that it is arranged at the outlet (5) along the axis An impact element (10) to the end side (17 '), the impact element having one or more impact surfaces (11, 12, 24).         The device of claim 1, wherein at least one impact surface (11, 12, 24) is inclined to the axis (A) at an angle (α, β) different from zero greater than 10 degrees and less than 80 degrees.         The device of claim 2, wherein at least one impact surface (11, 12, 24) is rotationally symmetric with the axis (A).         The device of claim 1, wherein the impact element (10) has two or more impact surfaces (11, 12), and the impact surfaces are inclined at different angles (α, β) to the axis (A).         The device of claim 1, wherein the one or more impact surfaces (11, 12, 24) extend along a cone surface or a truncated cone side, and wherein the cone base surface is a circular surface, an olive-shaped surface, or an elliptical surface.         The device of claim 1, wherein the size of the contour plane of the impact element (10) transverse to the axis (A) is at least twice the plane of the exit (5) transverse to the axis (A), or At least five times.         The device according to claim 1, wherein the impact element (10) has a first radial impact surface (11) in the radial direction, the impact surface extends on a cone surface, and the tip (13) of the cone is located on the axis ( A) and the tapered surface is inclined to the axis (A) at an angle (α) of 20 to 30 degrees, and the impact element has a radially outer second impact surface (12), which is formed in an olive shape or A circular fold line connects the first impact surface (11) and extends on the side of the truncated cone. The side of the truncated cone forms an angle (β) of 60 degrees to 85 degrees with the axis (A).         As in the device of claim 1, wherein the end of the delivery pipe (2) having the outlet (5) is inserted into the opening of the heated preheating element (8), the preheating element (8) can be flushed with gas (22) Thoroughly flush, the flushing gas enters the gap (9) between the preheating element (8) and the evaporation element (17).         The device of claim 1, wherein the distance (a) of the exit (5) is one to two times the diameter (D2, D3) of the impact element (10).         The device of claim 1, wherein the design axis or the graphic axis (B) of the impact element (10) is radially offset from the axis (A) passing through the center of the exit (5).         The device of claim 1, wherein the design axis or the graphic axis (B) of the impact element (10) is offset from the axis (A) by a certain angle.         The device according to claim 1, wherein the two impact surfaces (12, 24) are separated by a cylindrical surface (20).         The device according to claim 1, wherein a plurality of conveying pipes (2) are provided, and these conveying pipes and the center of the subarea (t, u, v, w) of the end (17 ') of the evaporation element (17) ( z) staggered, wherein each outlet (5) corresponds to an impact element (10), wherein the impact element (10) has a non-rotational symmetry with respect to the central axis (A) of the outlet (5) of the conveying pipe (2) Design and / or eccentric arrangement.         The device according to claim 1, wherein the impact element (10) is placed on an end side (17 ') of the evaporation element (17).