JPS6333913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a portable fine spray device according to the generic concept of claim 1.

(Problem to be solved by the invention) The present invention is characterized in that the spray leakage radiation of the mixing device is approximately 0.02.
The object is to improve the atomization of the fluid so that it contains only small particles of liquid substance, having a diameter of mm.

(Means for Solving the Problems) The problems of the present invention are solved by the configuration described in the characterizing part of claim 1.

(Effect of the invention) According to the present invention, the spray radiation consisting of the mixing device is approximately
The atomization of the fluid is improved so that it contains only small particles of liquid material having a diameter of 0.02 mm.

(Example) The portable fine spray device in the embodiment shown in Figures 1, 2 and 10 is for fine spraying of liquids used for plant protection and is selected by the operator. It can be carried either on the back or in the hand.

The embodiment shown as a backpack embodiment has an engine 1 and an air pump 2, which are fixed on a common frame 3. This frame is elastically attached to the backpack 5 by a vibrating element 4, and the elasticity of the vibrating element 4 is such that vibrations of the combined mass of the engine 1 and the air pump 2 are not transmitted to the backpack 5. has been adjusted to.
The unit consisting of engine 1 and air pump 2 is surrounded by a sound-insulating jacket, which consists of two shell-shaped halves 6, 7. This suppresses the dissipation of air noise.

The cooling air inlet and the compressed air inlet of the engine are prevented from sound dissipation by a resonant absorber constriction 8 in FIG. Cooling air exits the acoustic envelope at position 9. This point is also designed as a resonant absorber and is oriented upwards so that any residual sound or noise can be evacuated upwards. Small ventilation holes are provided in the lower region of the soundproof envelopes 6, 7, which serve to cool the interior.

The backpack carrier 5 has a back plate 14, which is also formed as a buffer member and prevents vibrations caused by impact sounds and air sounds from being transmitted to the operator's body.
Rather, this vibration is reflected or absorbed by the back plate 14. The combustion air inlet to the engine carburetor has a second
According to the figure, there is a resonant absorber 13, designated 12, located on the upper side of the cooling air envelope. According to FIG. 2, the exhaust gases of the engine are discharged via a silencer 16. In the embodiment shown, the silencer is arranged inside the soundproof jacket 6, 7. This prevents sound radiation. Also shown in FIG. 1 are the fuel tank 17 of the engine and the active substance container 18 for the liquid to be sprayed. From the air pump 2, a compressed air line 19 leads to a spray nozzle 20, which is shown in detail in FIGS. 3-10.

The spray nozzle 20 has a handle 1 formed as a handle.
The compressed air sent from the air pump 2 is supplied to the suction pipe via a hose (not shown) and flows from there into a mixing pipe 22, which has a front end thereof which sprays a spray. funnel mouth 3
0. At the rear end of the mixing tube 22 is seated a throttle valve 23 for metering the atomized spray, which may also be supplied by an air pump 2.
is supplied to the throttle valve 23 via conduit 24 under pressure supplied from From the throttle valve the spray passes through the central feed pipe 25 in the direction of the arrow 26 to the mixing and atomizing head 2 shown in FIG. 3 and enlarged in FIG.
Reach 8.

The mixing and atomizing head 28 has a tubular projection 29
It has a helix 31 in communication with a funnel opening 30, the helix 31 being shown in detail in FIGS. 30 serves to carry out a rotational movement of the propellant feed tube 25 and the mixing tube 22 about their longitudinal axes.

The helix 31 has four guide vanes 32 welded onto a tubular support 33. In the embodiment according to FIGS. 3 and 4, this support 33 is formed at the free end of the propellant feed tube 25. The conically shaped end wall 34 of this propellant feed tube favors swirling of the ejected propellant. In its rear half region, the guide vane 32 extends parallel to the common axis of the mixing tube 22 and the propellant feed tube 25, and in its front half region transitions into a cylindrical curved section 35, which forms a curved section. directs the compressed air flow into the desired rotational motion about axis A.

The compressed air exiting the helix 31 between the guide vanes is directed to the deflection surface 3 of the throttle 39, which is represented in longitudinal section in FIG.
8 in a circular collecting chamber 37, which restricts its cylindrical shank 49 to the propellant feed tube 25 or its terminal portion 3 in the manner shown in FIG.
It is fixed by press fitting into the bottomed hole 41 of No. 3.
The cylindrical tearing edge 44 of the deflecting surface 38 of the throttle 39 faces the hole in the projection 29 with a slight play 42, so that the compressed air leaving the collection chamber 37 in the direction of the arrow 43 is significantly As a result of the velocity, a strong suction effect is generated behind the sharp tearing edge 44 on the outlet side. This suction effect is decisive together with the measures for fine atomization of the propellant which will be explained in more detail below.

The propellant is passed through a vertical hole 48 arranged in the bottom 46 of the throttle valve 39 and communicating with this vertical hole 48, i.e. the mixing and spray platform 50 detailed in FIGS. 9 and 10.
is introduced into the vertical hole 48 in the shank 49 of. The mixing and spraying platform 50 has a bowl-shaped end portion important for fine spraying and has a cylindrical tubular jacket 51, which is oriented with respect to the common axis A. The shank 4 passes through the horizontally extending bottom portion 52.
It communicates with 9. The shank 49 has a thread 53 in its central part, which thread can be screwed into an internal thread 54 in the aperture 39 and which is located opposite the bottom 52 of the mixing and spraying platform 50. It is possible to adjust the axial distance of the annular chamber 55 between the bottom of the spray platform 50 and the end face 56 of the throttle valve 39 opposite this bottom, thereby optimizing the spray.

The shank 49 has a total of six radiation holes 58 between the thread 53 and the bottom 52, through which the spray can reach the annular chamber 55 from the vertical hole 48. The spray reaches radially outwards by the action of the compressed air flow accelerated in the play gap 42 and the sharp tearing edge formed by the bottom 32 of the spray platform and the tubular jacket 51. 59 and is strongly swirled and mixed, then flows together with the compressed air along the outer surface of the tubular jacket and forms a second conical hole 62 in the end face of the tubular jacket 51 at the end face of the tubular jacket. The sharp tearing edge 62 of is reached. This causes the reverse rotation shown by arrow 62 in FIGS. 3, 4, and 9, which causes the emulsion film (not shown) to move in the opposite direction toward the spray platform 50. It is returned to the inner depths of the body. The bottom portion 52 is provided with a number of vertical holes 63 in the manner shown in FIGS. 9 and 10, and the emulsion film passes through these holes into the bottom portion 52.
and the end face 56 of the diaphragm 38 into the annular chamber 55 . As a result, a fine spray is obtained at the tearing edge 61 of the spray platform 50, in which a mist-like mixing of the compressed air exiting from the spray funnel 30 and the liquid takes place, the liquid particles being It has a diameter of approximately 20 μm.

While the apparatus described and illustrated is primarily for the production of cold mist or cold aerosol, and the necessary energy is supplied for this purpose, FIG. shows. According to this, a warm aerosol or thermal mist can be generated. For this purpose, a device of the type described above can be followed by a combustion chamber 65 according to FIG. This combustion chamber receives fuel from a fuel tank, not shown, and is supplied by conduit 67 with the fresh air necessary for combustion. This combustion air can be branched off from the cold air line of the appliance or even from the air pump circuit. Combustion chamber 65
The hot gases produced within are mixed in a communication position 68 with compressed air 69 so that this combustion gas can be heated to any limit, for example up to 100 degrees Celsius, and then by the atomizing nozzle 20 mentioned above. It can be utilized for the generation of thermal fog.

[Brief explanation of drawings]

Figure 1 is a side view of the appliance in cross section of the soundproof jacket;
Fig. 2 is a first side view rotated by 90 degrees compared to Fig. 1; Fig. 3 is a partially front view approximately in actual size;
a spray nozzle of a device formed according to the invention, partly in axial longitudinal section; FIG. 4 a partial axial longitudinal section of the spray head of the spray nozzle according to FIG. 3;
FIG. 5 is a side view of the spiral body of the spray nozzle, FIG. 6 is a sectional view of the blower taken along the - line in FIG. 5, FIG. 7 is a developed view thereof, and FIG.
Fig. 9 is a vertical cross-sectional view of the spray nozzle and the axial line of the high spray base, and its rear view, Fig. 10 is a cross-sectional view of the blower taken along the - line in Fig. 9 and its rear view, and Fig. 11 is the dotted line of the spray and the 1 shows a modified embodiment of the device according to the invention with a combustion chamber available in the atomization process; Code in the figure, 20...mixing device (spray nozzle),
38... deflection surface, 52... deflection surface, 44,5
9, 61...Aperture edge, 52...Bottom, A...Axis line.

Claims (1)

Claims: 1. An engine and an air pump arranged on a common frame with the engine, the air pump producing a gaseous or liquid fluid, with both fluids are separately sent to a mixing device by which they are mixed with each other and sprayed from there, the mixing device 20 is arranged transversely to the jet axis A and axially two deflecting surfaces 38 arranged one behind the other in the direction;
52, these deflecting surfaces are surrounded by two aperture edges 44, 59, which are rotationally symmetrical with respect to the axis A.
61. A portable fine atomizing device comprising one of each of 61. 2. The first deflection surface is formed by a diaphragm 39 which is arranged at a distance in the flow direction behind the helix 31 with curved guide vanes 32. A portable fine spray device as described in Scope 1. 3. A mixing or spray platform 50 extending into the opening of the hollow conical spray funnel opening 30 is provided, the edges of the end faces of which are formed as tear edges 61. The portable fine spray device according to item 1 or 2. 4. The spray platform 50 has a tubular jacket 51 and a bottom 52 extending transversely to the axis A, the bottom forming with the tubular jacket a sharp tearing edge 59. The portable fine spray device according to item 3. 5 The spray high foot stand 50 and/or the aperture 39 are located at the bottom 5
5. The fine spray device according to claim 4, further comprising a mechanism for varying the axial gap between the diaphragm 2 and the flat free end surface 56 of the diaphragm. 6 The spray high foot stand 50 is connected to a shank 49 having a screw thread 53, and the shank has an aperture 3.
6. A portable fine atomizing device according to claim 5, which is provided with a female thread 54 of 9. 7 The shank 49 of the spray high foot stand 50 has a vertical hole 48 that communicates with the hole 47 arranged at the bottom 46 of the aperture 39.
7. A portable fine atomizing device according to claim 6, characterized in that a radiation hole for a liquid fluid communicates with said vertical hole (48). 8. According to any one of claims 1 to 7, in which a helix 31 is provided for deflection just before the confluence of the mixing tube 22 carrying the compressed air and the atomizing funnel opening. Portable fine spray device as described. 9. The helix 31 has a tube section 33 with several radially projecting guide vanes 32, which tube section has a central longitudinal hole for receiving the aperture 39 and/or the spray platform 50. 9. A portable fine atomizing device according to claim 8, in which the device is in airtight communication with a supply pipe (25) for the liquid fluid (26). 10 The guide vane 32 has in its longitudinal first half a cylindrically curved end section extending parallel to the axis, by means of which the compressed air is deflected tangentially and produces a rotational movement. A portable fine atomizing device according to claim 9. 11. Portable fine spray device according to claim 10, wherein the guide vane 32 is joined to the inner wall of the surrounding tubular projection, ie the projection 29 of the spray funnel opening 30. 12. Portable fine atomizing device according to claim 12, in which a combustion chamber 65 is provided for the generation of a hot air flow, the combustion chamber being operable in conjunction with the blower flow of the engine 1. 14. A soundproof jacket is provided surrounding the engine 1 and the air pump 2, the soundproof jacket consisting of two shell-shaped parts 6, 7. A portable fine spray device according to any one of the above.