DE9000814U1 - Spray device for low-viscosity liquids - Google Patents
Spray device for low-viscosity liquidsInfo
- Publication number
- DE9000814U1 DE9000814U1 DE9000814U DE9000814U DE9000814U1 DE 9000814 U1 DE9000814 U1 DE 9000814U1 DE 9000814 U DE9000814 U DE 9000814U DE 9000814 U DE9000814 U DE 9000814U DE 9000814 U1 DE9000814 U1 DE 9000814U1
- Authority
- DE
- Germany
- Prior art keywords
- spray device
- motor
- control
- current
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007921 spray Substances 0.000 title claims description 15
- 239000007788 liquid Substances 0.000 title claims description 11
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 244000309464 bull Species 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims description 3
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
- B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
- B05B7/2424—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together downstream of the container before discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
- B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
- B05B7/2416—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Description
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a a a a ■ &igr;a a a a ■ &igr;
-A--A-
Die Erfindung bzw. Neuerung betrifft eine elektromotorisch betriebene Sprüheinrichtung für niederviil:ose Flüssigkeiten, die bisher aus Spraydosen unter Druck versprüht werden.The invention or innovation relates to an electric motor-operated spray device for low -viscosity liquids which have previously been sprayed from spray cans under pressure.
Sprune^nrichfngen, inst>ösond;>rs zum Versprühen niederviskoser Flüssigkeiten, bind b.i :-er meist als Druckbehälter mit Treibgasfüllunq ausgeführt. Der Nachteil dieser Lösung ist, daß aieo^ Ti_ibc2s bekanntlich umweltschädlich ist.Spray guns, especially for spraying low-viscosity liquids, are usually designed as pressure vessels filled with propellant gas. The disadvantage of this solution is that it is well known that the gas is harmful to the environment.
Eine endere konventionelle Lösung besteht darin, die Flüssigkeit i..it einer Flüssigkeitspumpe und einer nachfolgenden Düse zu zerstäuben, was jedoch meistens große Flüssigkeitströpfen ergibt.Another conventional solution is to atomize the liquid using a liquid pump and a subsequent nozzle, but this usually results in large liquid droplets.
Der Erfindung bzw. Neuerung liegt die Aufgabe zugrunde, eine Sprüheinrichtung für niederviskose Flüssigkeiten
zu konzipieren, die keine Treibgase enthält.
Die Lösung der gestellten Aufgabe gelingt mit der Erfindung bzw. Neuerung bei einer Sprüheinrichtung der
eingangs genannten Art dadurch, daß ein Elektromotor eine Druckluftpumpe treibt, wobei die schnellströmende
Luft zu einer Sprühdüse geführt wird und eine davorliegende Venturidüse durch den entstehenden
Unterdruck die Flüssigkeit aus einem Behälter saugt und dadurch in die Versprühdüse gelangt. Die DruckluftpumpeThe invention or innovation is based on the task of designing a spray device for low-viscosity liquids that does not contain any propellant gases.
The solution to the problem is achieved with the invention or innovation in a spray device of the type mentioned at the beginning in that an electric motor drives a compressed air pump, whereby the fast-flowing air is guided to a spray nozzle and a venturi nozzle in front of it sucks the liquid out of a container through the resulting negative pressure and thus reaches the spray nozzle. The compressed air pump
• · ···· ■ ft S• · ···· ■ ft S
iit vorzugsweise als Verdrängerluftpumpe aufgebaut.
Oer Elektromotor zum Antrieb der Luftpumpe wird mit
Hilfe einer Fj ektronikeinhc^t aus einem Kondensator-Tank
mit elektrischer Energie .drsorgt.It is preferably constructed as a positive displacement air pump.
The electric motor for driving the air pump is supplied with electrical energy from a capacitor tank with the help of an electronic unit.
Die Aufladung des Kondensator-Tanks, der aus einem oder mehreren Kondensatoren bestehen kann, erfolgt entweder direkt oder induktiv.The capacitor tank, which can consist of one or more capacitors, is charged either directly or inductively.
Da als Energiespeicher keine Akkumulatoren, sonu^rn ein Kondensator verwendet wird, entstehen keine Umweltprobleme bei Entsorgung oder Recycling.Since no accumulators but a capacitor are used for energy storage, there are no environmental problems with disposal or recycling.
Erfindungsgemäße Ausführungen sind im einzelnen in den Fig.l bis 3 dargestellt.Embodiments according to the invention are shown in detail in Figs. 1 to 3.
Fig.l zeigt schematisch den mechanischen Aufbau.Fig.l shows schematically the mechanical structure.
Ein Elektromotor (1) treibt eine Druckluftpumpe (2) an.An electric motor (1) drives a compressed air pump (2).
Die schnellströmende Luft gelangt über eine Schlauchleitung (8) zu einer Venturidüse (5). Durch den entstehenden Unterdruck im Saugrohr (7) gelangt die niederviskose Flüssigkeit ads dem Behälter (6) als Luft/Flüssigkeitsgemisch in die Versprühdüse (9).The fast-flowing air reaches a Venturi nozzle (5) via a hose line (8). Due to the negative pressure created in the suction pipe (7), the low-viscosity liquid flows from the container (6) as an air/liquid mixture into the spray nozzle (9).
Als Druckluftpumpe (2) wird vorzugsweise eine Pumpe nach dem Verdrängerprinzip verwendet.A pump based on the displacement principle is preferably used as the compressed air pump (2).
Als Energiespeicher für den Elektromotor (1) wird ein Kondensator-Tank (4) verwendet, der aus einem oder mehreren Kondensatoren bestehen kann. Die Aufladung des Kondensator-Tanks erfolgt direkt oder induktiv und wird als Stand der Technik nicht näher beschrieben.A capacitor tank (4) is used as an energy storage device for the electric motor (1), which can consist of one or more capacitors. The capacitor tank is charged directly or inductively and is not described in more detail as it is state of the art.
Fig.2 zeigt schumatisch den elektrischen Aufbau.Fig.2 shows the electrical structure schematically.
Ein K(HHl(HiSn to r (4) ist s to .1 1 ver t. ir tend für den Kondensator-lank dargestellt. Die Energie des geladenen Kondensators (4) gelangt über einen Tief setzsteiler (10) zu einem vorzugsweise permanenterregten Gleichstrommotor (1) , der die elektrische Energie in mechanische Energie umwandelt., und dadurch die Druckluft [ium pe (2) antreibt.A K(HHl(HiSn tor (4) is shown as a reference for the capacitor bank. The energy of the charged capacitor (4) passes through a step-down converter (10) to a preferably permanently excited direct current motor (1), which converts the electrical energy into mechanical energy and thereby drives the compressed air pump (2).
In F ig . 3 sind weitere Einzelheiten dargesteLlt.
Eine Steuerungselektronik (11) schaltet ein ein- und
ausschaltbares Einwegventil (12), das ab jetzt nur noch
mit Ventil bezeichnet wird s &ugr; , daß der arithmetische
Mittelwert des Ankerstromes des Gleichstrommotors (1)
in etwa konstant gehalten wird. Ein konstanter Ankerstrom bewirkt ein konstantes Drehmoment. an der
Motorwelle, was letztendlich einen konstanten Luftstrom
aus der Druckluftpumpe zur Folge hat.Further details are shown in Fig. 3.
An electronic control unit (11) switches a one-way valve (12) that can be switched on and off, which from now on will only be referred to as a valve, so that the arithmetic mean value of the armature current of the DC motor (1) is kept approximately constant. A constant armature current causes a constant torque on the motor shaft, which ultimately results in a constant air flow from the compressed air pump.
Als Steuerverfahren kann eine sogenannte Zweipunkt-Regel j ng verwendet werden.A so-called two-point rule j ng can be used as a control procedure.
Bei diesem Verfahren wird das Ventil (12) bei
Unterschreiten eines durch die Stromfühlung (14) gemessenen M inimalwertes des Ankerstromes eingeschaltet.
Der Ankerstrom steigt nun in Folge aer wirksamen Spannung über den im Ankerkreis wirksamen
Induktivitäten stetig an. Beim Erreichen eines durch
die Stromfühlung (14) gemessenen Maximalwertes des Ankerstroms wird das Ventil (12) ausgeschaltet. Der
Ankerstrom kommutiert in den Freilaufkreis durch die
Diode (13). Durch die nun wirksamen Spannungen
hauptsächlich die induzierte Spannung derIn this process, the valve (12) is switched on when the armature current falls below a minimum value measured by the current sensor (14). The armature current now increases steadily as a result of the effective voltage across the inductances in the armature circuit. When the maximum value of the armature current measured by the current sensor (14) is reached, the valve (12) is switched off. The armature current commutates into the freewheeling circuit through the diode (13). The voltages now effective
mainly the induced voltage of the
Gleichstrommaschine - über die im Ankerkreis wirksamen Induktivitäten sinkt der Ankerstrom stetig ab. Beim Unterschreiten eines Minimalwertes des Ankerstroms wird das Ventil (12) wieder eingeschalten.DC machine - the armature current decreases continuously via the inductances in the armature circuit. When the armature current falls below a minimum value, the valve (12) is switched on again.
Durch dieses Steuerverfahren wird der Ankerstrom des Gleichstrommotors wirkungsvoll in gewissen Grenzen gehalten und somit ein konstanter Mittelwert des Stromes erzielt.This control method effectively keeps the armature current of the DC motor within certain limits, thus achieving a constant average current value.
Eine Variante des oben genannten Steuerverfahrens kann
durch eine sogenannte Pulsbreitensteuerung mit Regelwirkung erreicht werden, bei der die
Pulsperiodendauer des Ansteuersignals für das Ventil (12) konstant gehalten wird. Der Unterschied zum
vorhergehenden Verfahren besteht darin, daß das Ventil zu festen Zeitpunkten ein- bzw. ausgeschaltet wird.
Der erste Fall ist dadurch gekennzeichnet, daß das Ventil zu festen Zeitpunkten eingeschaltet wird, und
beim Erreichen eines gewissen Maximalwertes des Ankerstromes, der durch die Stromfühlung (14) erkannt
wird, wieder ausgeschaltet wird und auch für den Rest
der Periode ausgeschaltet bleibt.A variant of the above-mentioned control method can be achieved by a so-called pulse width control with control effect, in which the pulse period of the control signal for the valve (12) is kept constant. The difference to the previous method is that the valve is switched on or off at fixed times.
The first case is characterized by the fact that the valve is switched on at fixed times and, when a certain maximum value of the armature current is reached, which is detected by the current sensor (14), it is switched off again and remains switched off for the rest of the period.
Der zweite Fall ist dadurch gekennzeichnet, daß das Ventil zu festen Zeitpunkten ausgeschaltet wird, und beim Erreichen eines gewissen Minimalwertes des Ankerstromes, der durch die Stromfühlung (14) erkannt wird, wieder eingeschaltet wird und auch für den Rest der Periode eingeschaltet bleibt.The second case is characterized by the fact that the valve is switched off at fixed times and when a certain minimum value of the armature current is reached, which is detected by the current sensor (14), is switched on again and also remains switched on for the rest of the period.
Dem Ventil wird also ein Ansteuersignal mit konstanter Pulsperiodendauer zugeführt.The valve is therefore supplied with a control signal with a constant pulse period.
jj Eine weitere Variante von Steuerverfahren kann durchjj Another variant of taxation procedures can be
% eine Pulsfolgesteuerung mit Regelwirkung erreicht % a pulse sequence control with control effect is achieved
I^ werden, bei der die Pulspause bzw. PulsdauerI^, where the pulse pause or pulse duration
&Kgr; (Einschaltdauer) des Ansteuersignals des Ventils (12)&Kgr; (duty time) of the control signal of the valve (12)
P konstant gehalten wird. P is kept constant.
'i Der erste Fall ist dadurch gekennzeichnet, dal} beim 'i The first case is characterized by the fact that
I Erreichen eines Maximalwertes des Ankerstromes, der I Reaching a maximum value of the armature current, the
:, durch die Stromfühlung (14) erkannt wird, das Ventil:, is detected by the current sensor (14), the valve
t für eine konstante Zeitdauer ausgeschaltet wird. Int is switched off for a constant period of time. In
·'. diesem Fall tastet die Stromfühlung auf den Maximalwert·'. In this case, the current sensor scans for the maximum value
des Ankerstroms. Dem Ventil wird also ein *: Ansteuersignal mit konstanter Pulspauae und variablerof the armature current. The valve is therefore given a *: control signal with constant pulse duration and variable
f; Pulsdauer (Einschaltdauer) zugeführt.f; pulse duration (duty time).
·. Der zweite Fall ist dadurch gekennzeichnet, daß beim·. The second case is characterized by the fact that
\i Erreichen eines Minimalwertes des Ankerstromes, der \i Reaching a minimum value of the armature current, the
§; durch die Stromfühlung (14) erkannt wird, das Ventil §; detected by the current sensor (14), the valve
& für eine konstante Zeitdauer eingeschaltet wird. In& is switched on for a constant period of time. In
f| diesem Fall tastet die Stromfühlung auf den Minimalwertf| in this case the current sensor scans for the minimum value
des °nkerstromes. Dem Ventil wird älsü ein Ansteuersignal mit konstanter Pulsdauer (Einschaltdauer) und variabler Pulspause zugeführt.of the armature current. The valve is supplied with a control signal with a constant pulse duration (on time) and a variable pulse pause.
Bei kleinen Gleichstrommotoren (1) ist es möglich, daß wegen kleiner Ankerinduktivitäten eine zusätzliche Spule (15) zur Ankerstromglättung erforderlich wird. Die Spule (15) ist, wie in Fig.3 gezeichnet, L; mittelbar vor den Gleichstrommotor (1) in Reihe geschaltet.In the case of small direct current motors (1) it is possible that an additional coil (15) for smoothing the armature current is required due to small armature inductances. The coil (15) is, as shown in Fig.3, connected in series L; directly in front of the direct current motor (1).
Claims (8)
Ansteuersignals für das Ventil (12) konstant hält.6. Spray device according to claim 4, characterized in that üdB a pulse width modulation is used as the control method for the step-down converter �idiagr; (10), in that ; the control electronics (11) determine the pulse period of the
control signal for the valve (12) is kept constant.
gekennzeichnet, daß im Ankerstromkreis des Gleichstrommotors zur Glättung des Stromes zusätzlich eine Spule
(14) in Reihe geschaltet wird.8. Spray device according to claims 4 to 7, characterized
characterized in that in the armature circuit of the DC motor an additional coil is provided to smooth the current
(14) is connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9000814U DE9000814U1 (en) | 1990-01-25 | 1990-01-25 | Spray device for low-viscosity liquids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9000814U DE9000814U1 (en) | 1990-01-25 | 1990-01-25 | Spray device for low-viscosity liquids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9000814U1 true DE9000814U1 (en) | 1991-05-23 |
Family
ID=6850339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9000814U Expired - Lifetime DE9000814U1 (en) | 1990-01-25 | 1990-01-25 | Spray device for low-viscosity liquids |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE9000814U1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7225959B2 (en) | 2001-04-30 | 2007-06-05 | Black & Decker, Inc. | Portable, battery-powered air compressor for a pneumatic tool system |
| US7494035B2 (en) | 2001-04-30 | 2009-02-24 | Black & Decker Inc. | Pneumatic compressor |
| CN102266828A (en) * | 2010-06-04 | 2011-12-07 | 上海连能机电科技有限公司 | Plastic magma spray device and method of spraying magma fog thereof |
-
1990
- 1990-01-25 DE DE9000814U patent/DE9000814U1/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7225959B2 (en) | 2001-04-30 | 2007-06-05 | Black & Decker, Inc. | Portable, battery-powered air compressor for a pneumatic tool system |
| US7494035B2 (en) | 2001-04-30 | 2009-02-24 | Black & Decker Inc. | Pneumatic compressor |
| CN102266828A (en) * | 2010-06-04 | 2011-12-07 | 上海连能机电科技有限公司 | Plastic magma spray device and method of spraying magma fog thereof |
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