DE4115774A1 - Hand-held and manually operated atomiser - has reservoir which maintains continuous spray of atomised liquid and chamber acting as reservoir - Google Patents

Abstract

A hand-held atomising device for spraying water light oil or other liquids of a similar consistency, consists of a container (19) which is provided with a lid. (4). The lid supports the suction pipe (32) of a piston type pump which is actuated by a lever (7). The upper end of the pump cylinder is connected to a cylindrical chamber (50) to which the spraying nozzle (39) is connected by a pipe (2). The chamber forms a reservoir for the pumped liquid and maintains a continuous spray of atomised liquid through the nozzle. USE/ADVANTAGE - Manually operated atomiser which maintains a continuous spray of atomised liquid.

Description

The invention relates to a hand atomizer device consisting of a storage container for the atomized Well, like thin oil, water, thin paint, one lid or top plate that can be placed on the storage container, the one in the container reaching into the good tube of a piston pump, a hand lever for actuating the Piston of the piston pump and one with a piston pump outlet-related atomizer nozzle.

Such a hand atomizer device is already known. The disadvantage with her is that the atomization process inter Averaging takes place only when the piston the atomizing material from the stock in the piston pump container through the piston pump outlet to the atomizer nozzle presses. This is only done when tightening or pressing the hand lever in the direction of the container through the hand, in which the piston is guided so that previously sucked Well pressed into the tube to the atomizer nozzle while at the reverse movement of the hand lever, which is due to  The piston pump pumps the material to be atomized from the supply in the storage container.

Due to this inevitable intermittent supply of atomizing material to the atomizing nozzle can result in that the nozzle, in addition to atomized material, also drop-shaped material releases what is disadvantageous in certain applications. For example, is the good to be atomized to a thin fluid color that is even on one surface should be applied, such drops lead to unsightly Appearance.

For this reason, it has not been common with such Manual atomizers also thin, sprayable Applying colors to surfaces, one used rather z. B. Paint spray cans containing a pressurized gas. Such pressure However, gas spray cans have other disadvantages for example, the use of certain compressed gases Cause environmental problems. Even the fact that such Spray cans can only be used once, d. that is it is a disposable container, which then thrown away represents a not to be underestimated Environmental pollution, apart from the increased cost that thereby arise.

The object of the invention is the hand known per se atomizer device to improve that they too is suitable for such applications as paint spraying, where a non-pulsating delivery of a spray occurs, but a continuous delivery as possible. On this way, for example, the formation of drops during of the spraying process can be prevented.

The object is achieved in that a cavity is provided is, which - in normal working position the hand atomizer pump - lower end in the piston pump outlet and the Zer  dust nozzle connection opens.

Through this cavity at the lower end of the atomizer nozzle connection is present, a desired boiler results like construction that will fill with ambient air, which works as a pressure pad and which due to the Pump piston assembly originally intermittent pressure generation for the atomizer nozzle in a largely continuous converts the atomizer nozzle to pressurization.

This cavity is expediently chosen so large that at the number of strokes usually used per unit of time (for example 20 to 30 strokes per minute) and the amount transported per stroke (for example 1 cm ² ) and the associated volume delivery of the nozzle there is a relatively uniform pressure cushion within of the cavity. It has been found that 2 to 10 times the volume of the stroke volume is sufficient as the cavity content for this. On the other hand, this means that the outer circumference of the hand atomizer device is not significantly increased by the addition of the storage container.

According to a preferred embodiment, the cavity represents a cylinder which is closed at its upper end and at its lower end on the end face of a ring or head piece is attached pressure-tight, through the wall this ring is a breakthrough for the supply pipe or the Supply connection for the atomizer nozzle is guided.

This has proven to be a particularly simple arrangement proven.

The ring can also have an approach based on its circumference for pushing a flexible nozzle supply hose have, which is advantageous if in inaccessible Make a spray jet to be generated.  

In the breakthrough of the ring can be the end of a pipe pressure-tight by means of soldering or press-fitting be inserted, which pipe at its other end one also pressure-tight by means of soldering, gluing or a press fit attached nozzle carries. This fixed tube arrangement allows one-handed operation while using a flexible tube, for example a flexible hose (as indicated in the previous paragraph) either somehow attached, or held by the other hand must become.

The cylinder is preferably with at its fastening end provided with an internal or external thread with which it is on or in a corresponding outer or formed by the ring Internal thread can be screwed on.

Instead of the threaded surfaces, smooth surfaces can also be used be provided, which are connected pressure-tight by means of an interference fit are, or which are glued or soldered.

The detachable connection by means of thread, however, has the Advantage that the cavity and to this cavity closing lines for nozzle connection or pump outlet remain accessible for cleaning purposes.

Instead of the detachable threaded screw connection, there would also be one sealing press fit conceivable, especially if the Storage container is injection molded from plastic, and this Plastic is slightly flexible, so that an ent speaking shaped end of this storage container made of art fabric over a corresponding receiving surface, by the Ring could be formed, can be postponed. The Another advantage of the plastic is that it is transparent could be designed to keep the fluid level and to examine the air cushion space above and firmly make sure that the correct spray pressure is reached, what  for example, it can be recognized that the air space inside half of the container is reduced to a certain height, for example by climbing up and doing it simultaneously Compressing the gas in the air cushion space inside the storage container, which then also with could be provided with a corresponding scale, which, at for example, when the device is in an upright position Provide an indication of the level of the liquid to be sprayed would.

The storage room can also be made of plastic (or injection bare metal) sprayed cylinder or as a ball be formed, alternatively as a bulbous hollow spatial approach.

The storage container can also be made of plastic (or spray barem metal) injected or cast, with Use of translucent plastic also the Control options improved, weight reduced and if necessary, the costs can be reduced.

Both storage containers and a plastic ge injected cavity can carry a scale.

The storage container expediently points at its opening an internal thread in which the lid with its outside thread can be screwed in. This allows the storage room Make it more accessible, for example to clean it and fill with a new liquid.

The cover can also rest against an abutment ring surface the end face of the container opening, if necessary under Intermediate layer of a flat ring seal. That seals the Container better off and prevents, for example, the end run out of liquid when the container is not upright stands.

The invention is illustrated below with the aid of an embodiment game explained in more detail, which is shown in the drawings is.

It shows

Fig. 1 in a sectional side view of an inventively designed hand atomizer.

In Fig. 1, a hand-held atomizer 30 can be seen, consisting of a reservoir 19 for the material to be atomized, the liquid level 31 of which, depending on the position of the container, can be different during hand spraying, for example in an upright position at 31 , at about 45 ° inclined position forward (in the direction of the nozzle or the hand lever) at 31 ' . In both cases, the suction pipe 32 is with its suction opening 33 within the liquid to be sprayed, even if the amount of supply has decreased significantly, see the liquid mirror 31 ''. This is due to the curved shape of the suction pipe 32 in the direction of the work tendency normally present.

The storage container, which can be injection-molded from light metal, or from plastic, possibly transparent plastic, has an internal thread 34 near its upper edge, in which the external thread 36 of a cylindrical extension 35 can be screwed in, which is provided by a cover or top plate 4 goes out. This cover carries the suction pipe 32 reaching into the container to be sprayed, which is preferably passed liquid-tight through the cover and which at its upper end opens or integrally merges into a ring or head piece 3 , the wall of which has an opening 37 for the supply pipe 38 or a corresponding supply hose for the atomizing nozzle 39 .

As already mentioned, it is useful if the Vorratsbe container 19 has an internal thread 34 at its opening, into which an external thread 36 formed by the cover or top plate 4 can be screwed. Tightness is achieved when the cover or the top plate 4 forms a bearing ring surface or a corresponding conical surface 56 , to which the end face of the open end of the container 19 can preferably be liquid-tight, the tightness, for example, in particular by an interposed flat ring seal 8 can be ensured.

On the cover 4 , a hand lever 7 is placed, which has an opening 40 in the support area through which the tube 32 passes with play, such that the lever can be rocked around a circular contact surface 42 when the surface 41 to be gripped by hand is tightened . The end 43 is lifted off the lid surface and takes a pull rod 20 with it, which is hooked into a corresponding opening of the lever and is guided into the interior of the container through a guide 44 provided in the lid and provided with a sliding seal, parallel to the tube 32 . With the aid of a slide bar 12 that can be slidably fastened on this pull rod 20 , the stroke that is to be fed in with the hand lever 41 can be determined. The tie rod end is guided through a bore in a piston device 13 and is fixed there with a cap nut 18 . This Kolbenvor device 13 carries an angled injection molded part 45 with an inner longitudinal opening 46 , which extends to a suction valve area 47 , the end of which merges into a suction valve seal 17 , which forms the already mentioned suction opening 33 , which suction opening can be closed by a ball 15 , which is pressed in the rest position by a compression spring 14 against the opening 33 so that the ball closes the opening 33 in this position.

Of the injection molded part 45, a piston tube goes from 11, which can slide inside or outside a top plate tube 10 axially movable with the two tubes 10, 11 so closely into each other is that a substantial fluid-tight piston-piston-cylinder arrangement. There is a compression spring 9 within the two tubes, which presses the two tubes 11 , 10 apart as far as the pull rod 20 allows.

The tube 10 merges into a pressure valve arrangement 48 , consisting of a tube constriction on which a ball 6 rests, under the compressive stress of a compression spring 5 .

This area can form an integrally cast component with the cover or the pressure plate 4 , into which the tube 10 can be inserted.

The method of operation is such that when the lever 41 is tightened, the space available within the tubes 10 and 11 is reduced and therefore material to be conveyed, such as a paint liquid to be sprayed, is pressed against the two balls 15 and 6 . However, the ball 15 is pressed into its sealing seat and does not allow any liquid to pass through. In contrast, the ball 6 can deflect against the force of the spring 5 , so that the liquid in the tube part 48 rises and enters the piston pump outlet space 49 of the ring or head piece 3 . From there it then passes into the supply pipe 38 of the nozzle 39 , in order to be finally sprayed out of the nozzle there.

As soon as the metering clamp 12 has reached the lower edge of the guide 44 , the piston movement ends, the operator will let go of the lever 41 , whereupon the lever end 43 with the pull rod 20 hooked into it slides back under the force of the spring 9 , whereby, since now the upper valve 6 is closed by the pressure force of the spring 5 , forms a negative pressure within the cavity formed by the two pipe sections 10 and 11 . As a result, the ball 15 is lifted against the force of the spring 14 and liquid flows from the reservoir 19 into the cavity, which is indicated at 46 . If the hand lever 41 is then tightened again, the valve closes with the ball 15 and the process is repeated as described above.

This results in a pulsed conveyance of the material to be sprayed into this space 49 , and accordingly the product to be sprayed emerges intermittently from the nozzle 39 .

In order to eliminate this intermittent function, a cavity 50 opens out in the area of the piston pump outlet 49 , in particular in the area where this piston pump outlet 49 merges into the atomizer nozzle connection tube area 38 , namely in the normal working position of the hand atomizer device, that is to say either upright or slightly in the direction inclined towards the nozzle 39 with its lower end 51 .

This has the effect that suctioned and in the piston pump outlet chamber 49 pressed liquid can rise in this cavity 51 , for example up to the liquid mirror, which is indicated at 52 , whereby compressed air or gas is compressed in the cavity 50 . By this compression, the trapped air exerts a pressure on the mirror 52 which is sufficient to continue to convey liquid through the pipe 38 to the nozzle 39 during the release movement of the lever 41 , in which time the valve with the ball 6 is closed so that the spray jet is not interrupted when the lever 41 is released. Only when the liquid level 52 has dropped so far in the direction of the piston pump outlet space 49 that there is no longer sufficient overpressure would this spray effect cease. Meanwhile, however, the operator has possibly again put on the pump lever 41 and pumped again fluid in the piston pump chamber 49, so that the mirror 52 again rises and thereby the pressure of the trapped in the cavity 50 the gas is increased again. Depending on the amount pumped up per unit of time and the amount of liquid escaping, a certain liquid level 52 and thus a certain pressure of the air cushion above it will thus set, with an increased pumping speed resulting in an increased pressure and thus also an increased pressure force on the material to be sprayed out and thus ultimately also an increased amount of liquid sprayed out.

The ratio of the volume of the cavity 50 to the volume carried per piston stroke determines the pressure fluctuation that occurs during the pumping movement. If this ratio is 1: 5, for example, the pressure fluctuation is only about 20 to 25%.

In the essentially scale embodiment shown here, the ratio is about 4: 1, so that the pressure fluctuations are only about 20 to 30%, which enables a sufficiently uniform spraying for most applications. If this fluctuation is to be further reduced, only the cavity shown needs to be replaced by an enlarged cavity, for example by making it possible to unscrew or remove the cylinder 1 serving as the air reservoir from the ring or head piece 3 , in order to then drift through another, again cylin , or spherical or bulbous air reservoir with a larger volume to be replaced.

According to an embodiment not shown here, an extension can also be provided at the passage point 37 , to which a flexible hose can be attached, which in turn then carries a suitable atomizing nozzle 39 at its end.

This tube could in the opening 37 by means of soldering, gluing or interference fit to be used, as well as the tube 38, made for example of metal, in the opening 37 can be inserted and sealed by means of these measures.

In order to make the cylinder 1 interchangeable, it could have an internal thread (or external thread) with which it can be screwed or screwed onto a corresponding external (or internal) thread formed by the head part or ring 3 . Alternatively, the ring or the head piece 3 could also form a mounting edge 53 (shown in dashed lines), which has no thread on its outer ring surface 54 , but is smooth and thereby enables the cylinder 1 to be pushed on directly in order to then re-glue or solder it. If the cylinder consists of a somewhat resilient material, such as appropriate plastic, a simple pushing on is also sufficient if the fit is an appropriately shaped press fit, so that the pressure created in the cavity 50 is not sufficient to push the cylinder 1 off the surface 50 .

If the air reservoir or cylinder 1 is injected from plastic, it would be expedient to manufacture it from transparent plastic so as to be able to check where the liquid level 52 is located in each case. This enables the function to be checked.

The removability of the cylinder 1 (or a correspondingly differently shaped air storage device) allows easy cleaning of the air space 50 or the piston pump outlet space 49 with the cavities and fluid lines emanating therefrom, which is sometimes advantageous. In particular, if the color of a paint to be sprayed is to be changed, it should make sense to carry out intermediate cleaning, which is facilitated by the ability to remove the air reservoir 1 .

If the air accumulator 1 is made of transparent plastic, it could make sense to attach a scale 55 in order to be able to read the pressure generated, for example. The scale can be generated by pressing in markings or by applying prints or the like.

Claims (12)

1. Hand-held atomizer device ( 30 ), consisting of a storage container ( 19 ) for the material to be atomized, such as low-viscosity oil, water, low-viscosity paint, a lid or head plate ( 4 ) that can be placed on the storage container and that has a suction pipe that extends into the container ( 32 ) a piston pump, a hand lever ( 7 ) for actuating the piston of the piston pump, and an atomizing nozzle ( 39 ) connected to a piston pump outlet ( 49 ), characterized in that a cavity ( 50 ) is provided, the - in normal working position of the hand atomizer device - lower end opens in the connection area between the pump outlet ( 49 ) and the atomizer nozzle connection ( 38 ). 2. Hand atomizer device according to claim 1, characterized in that the cavity ( 50 ) is a cylinder ( 1 ) which is closed at its upper end and at its lower end to the end face of a ring or head piece ( 3 ) is attached pressure-tight, whereby by the wall of this ring has an opening ( 37 ) for the supply pipe ( 38 ) or the supply hose for the atomizing nozzle ( 39 ). 3. Hand atomizer device according to claim 2, characterized in that the ring ( 3 ) has a starting from its periphery for pushing on a flexible hose for supplying the nozzle ( 39 ). 4. Hand atomizer device according to claim 2, characterized in that in the opening ( 37 ) the end of a tube ( 38 ) is inserted pressure-tight by means of soldering, gluing or by means of an interference fit, which tube ( 38 ) at its other end also by means of soldering, gluing or with a press fit nozzle ( 39 ). 5. Hand atomizer device according to one of claims 2 to 4, characterized in that the cylinder ( 1 ) carries at its fastening end an internal or external thread with which it is on or in a corresponding, formed by the ring external or internal thread ( 54 ) the ring ( 3 ) can be screwed on. 6. Hand atomizer device according to claim 5, characterized in that instead of the threaded surfaces smooth surfaces ( 54 ) are formed, which are pressure-tightly connected by means of a press fit, or which are glued or soldered. 7. Hand-held atomizer device according to one of claims 2 to 6, characterized in that the cavity ( 50 ) is formed by a cylinder molded from plastic or spray metal or by a ball or by a part having a bulbous shape. 8. Hand atomizer device according to claim 7, characterized characterized in that the plastic is transparent.   9. Hand atomizer device according to claim 8, characterized in that the cylinder carries a scale ( 55 ). 10. Hand atomizer device according to one of claims 1 to 9, characterized in that the storage container ( 19 ) is injection molded from plastic or metal. 11. Hand atomizer device according to one of claims 1 to 10, characterized in that the storage container ( 19 ) has at its opening an internal thread ( 34 ) into which the lid or the top plate ( 4 ) with an external thread ( 36 ) can be screwed. 12. Hand atomizer device according to claim 11, characterized in that the cover ( 4 ) has a contact ring surface for contacting the end face of the container opening, optionally with the interposition of a flat ring seal ( 8 ).