ATOMISER FOR FLUIDS

Abstract: The invention concerns an atomiser for fluids with the support of compressed gas. The atomiser is provided with cleaning systems for cleaning the fluid nozzles (13) and also the gas nozzle (2). The cleaning action is introduced by closing the gas supply and executed by springs (6). The atomiser is so organised that only fluid is forwarded after opening of the gas supply. The atomiser looses no droplets fluid at the start or ending of a period of atomising. A plunger activated by compressed gas positions the cleaning tube (20) into working position with thrustbars (24) after which the fluid supply is opened and then the triangular opening will be open. The atomiser is characterised in that both the fluid nozzle and the gas nozzle are rigid fixed in the atomiser and the cleaning elements are moving. The atomiser is very suitable for humidifying air in spaces, atomising suspensions like desinfectants and such.

Description: Atomiser for fluids. The invention concerns an atomiser for fluids with the support of compressed gas. The atomiser is provided with cleaning systems for cleaning the fluid nozzle and also the gas nozzle. The cleaning action is introduced by closing the gas supply and executed by springs. The atomiser is so organised that only fluid is forwarded after opening of the gas supply. The atomiser loses no droplets fluid at the start or ending of a period of atomising. A plunger activated by compressed gas positions the cleaning tube into working position with thrust bar after which the fluid supply is opened and then the triangular opening will be open. The atomiser is characterised in that both the fluid nozzle and the gas nozzle are rigid fixed in the atomiser and the cleaning elements are moving. The atomiser is very suitable for humidifying air in spaces, atomising suspensions like disinfectants and such. Atomisers of this kind are known from the European publication EP-A-525164. It turned out that the cleaning is not optimal and the production of noise is considerable. By having a separate cleaning system for the fluid nozzle and the gas nozzle it has been possible to reduce the noise and make the cleaning more effective. Therefore a movable needle is placed in the fluid supply tube and around the fluid supply tube a cleaning element that cleans the gas nozzle. The invention will be explained with the help of the drawing. Fig. 1 shows a cross-section along the length of the atomiser at rest Fig. 2 shows the atomising head enlarged and operational. Fig. 3 shows a transferees section at the position of the gas connection. In Fig. 1 The atomiser body is indicated with (1). Gas nozzle (2) is mounted in body (1). On the other side is bottom (3) mounted. Bottom (3) fits in the cylindrical boring (4) where piston (5) moves axially. Piston (5) is urged by spring ( 6 ) into boring ( 4 ) . Needle holder ( 7 ) , which is positioned in the centre of the atomiser slides through piston (5). Stop (8) is adjustable fixed to needle holder (7). Spring (9) forces needle holder (7) via stop (8). Needle holder (7) is drilled on end (10) with a stepped hole (11). Needle (12) slides fitting through fluid nozzle (13) which is fixed in holder (14). At (15) a part of the wall of fluid nozzle (13) is taken away to have a triangular opening. In holder (14) is a boring (16) which holds sealing ring (17). End (10) of needle holder (7) slides easily through boring (16). Inside gas nozzle (2) is a cleaning element (18) composed of a holder (19) and tube (20) which slides fittingly around fluid nozzle (13) and sliding fittingly inside blow opening (21) of gas nozzle (2). Holder (19) is urged against body (1) by spring (22). In boring (23) lies with play thrust bar (24). Thrust bar (24) reaches into boring (4) and has such a length that piston (5) with help of spring (6) displaces holder (19) against spring (22) so far that tube (20) reaches through blow opening (21). Compressed gas is supplied via connection (25) and channel (26) which goes from boring (4) until space (27) in gas nozzle (2). Fluid is supplied via connection (28), boring (29) to channel (30) in which needle holder (7) is. In channel (30) is at (31) the passage of needle holder (7) sealed. The operation is as follows: Fig. l shows the atomiser at rest. Fluid is supplied under pressure via connection (28). Needle holder (7) rests with end (10) against seal (17) with the force of spring (9) and seals the connection between channel (30) and triangular at (15). Needle (12) reaches whole through fluid nozzle (13). Piston (5) pushes with the support of spring (6) and thrust bar (24) cleaning element (19, 20) through blow opening (21). When compressed gas is admitted to connection (25) -piston (5) will move with sufficient gas pressure against spring (6). This allows cleaning element (18) by spring (22) to free blow opening (21). The compressed gas can now flow through blow opening (21). When piston (5) moves further-on needle holder (7) will come into action and free seal (17). When piston (5) reaches the end of its travel triangular opening at (15) will be opened. The dimension of this opening is adjusted with stop (8). Fluid now flows from channel (30) via triangular opening at (15) through fluid nozzle (13) to blow opening (21) and is atomised in the already existing gas stream. At closing of the gas supply the movements will be executed in reverse sequence, where it must be remarked that the fluid supply is already closed with seal (17) before the pressure has completely gone. Therefore the last fluid from fluid nozzle (13) will always be atomised. With every interruption of the atomising process there is a cleaning movement where the fluid nozzle (13) will be pierced by needle (12) and blow opening (21) by tube (20).

Claims: m aiπι ; r 1.Atomiser for atomising of fluid with the support of compressed gas which is provided with a cleaning system for the fluid nozzle (13) characterised by that the atomiser (1) is provided with a tube (20) for gas nozzle (2) where the cleaning movement of tube (20) is caused by the force of spring (6) against piston (5) where the action of piston (5) is transferred by one or more thrust bar (24). 2. Atomiser according to claim 1 characterised by that at starting the operation of the atomiser (1) by means of compressed gas first tube (20) is retracted by spring (22) and after this the fluid supply is opened, hereafter needle (12) is retracted such that via opening at (15) fluid flows to fluid nozzle (13) and withe the gas flow is atomised. 3. Atomiser according to claim 1 and 2 characterised by that piston (5) at starting the operation of the atomiser (1) by means of compressed gas moves axially where first holder (19) by push bars (24) reaches working position after which stop (8) is brought into action after an adjustable free stroke of piston (5). 4. Atomiser according to claim 1, 2 and 3 characterised by that the fluid supply is closed by the hollow part of needle holder (7) and elastic ring (17) in holder 14. 5. Atomiser according to claim 1, 2 and 3 characterised by that fluid nozzle (13) and gas nozzle are immovable fixed to atomiser body (1) where the cleaning elements (12, 20) activate the cleaning movement at the closing of the gas supply. * * * *

Inventors: VALSTER JOHANNES, VALSTER, JOHANNES
Applicants: PANTSER STICHTING, VALSTER JOHANNES, STICHTING "PANTSER", VALSTER, JOHANNES
Application year: 1998
Main classification: B05B15
IPC codes: B05B7, B05B15