EP0104422A2 - Distributeur commandé électriquement - Google Patents

Distributeur commandé électriquement Download PDF

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Publication number
EP0104422A2
EP0104422A2 EP83108248A EP83108248A EP0104422A2 EP 0104422 A2 EP0104422 A2 EP 0104422A2 EP 83108248 A EP83108248 A EP 83108248A EP 83108248 A EP83108248 A EP 83108248A EP 0104422 A2 EP0104422 A2 EP 0104422A2
Authority
EP
European Patent Office
Prior art keywords
output device
dispenser
pump
dispensing
electromagnet
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.)
Granted
Application number
EP83108248A
Other languages
German (de)
English (en)
Other versions
EP0104422B1 (fr
EP0104422A3 (en
Inventor
Aktiengesellschaft Feldmuhle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scott-Feldmuehle Te Duesseldorf Bondsrepubli GmbH
Original Assignee
Feldmuehle AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Feldmuehle AG filed Critical Feldmuehle AG
Priority to AT83108248T priority Critical patent/ATE23431T1/de
Publication of EP0104422A2 publication Critical patent/EP0104422A2/fr
Publication of EP0104422A3 publication Critical patent/EP0104422A3/de
Application granted granted Critical
Publication of EP0104422B1 publication Critical patent/EP0104422B1/fr
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT; ACCESSORIES THEREFOR, e.g. TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste or the like
    • A47K5/06—Dispensers for soap
    • A47K5/12—Dispensers for soap for liquid or pasty soap
    • A47K5/1217—Electrical control means for the dispensing mechanism

Definitions

  • the invention relates to an electrically actuated dispenser for liquid or pasty goods, such as disinfectants and cleaning agents, soap and ointments, which essentially consist of a dispenser for the goods to be dispensed, a pump connected to the dispenser and an inlet and an outlet valve for the goods to be dispensed consists.
  • Output devices of the aforementioned type are known, for example, from DE-OS 3o 36 523 and have also proven themselves in practice. With these units, however, manual operation is still required, i.e. the dispenser must be operated with a lever for dispensing, which is undesirable for areas in which increased hygienic requirements are imposed.
  • a soap dispenser with proximity switch which fulfills this requirement, that is, when an object, for example the hand, approaches a motor on the dispenser that pumps a predetermined amount of soap out of the container .
  • the motor is controlled by a switching device that reacts to fast movements in an electrical or acoustic field, but not to slow movements.
  • the switching device also contains timers with which the delivery quantity and the minimum pause length between the individual soap deliveries can be set.
  • This unit is a very complex device that has to be operated via the mains due to the built-in motor, which is not without problems in damp rooms and when dispensing liquids.
  • an attempt will also be made to replace an existing manual dispenser with an automatic dispenser, and a new electrical installation will have to be installed in the intended place of the dispenser, which means additional effort. Economical operation of an electric motor using built-in batteries is not possible, since these are used up too quickly due to the load.
  • the present invention is therefore based on the object of providing a dispenser which dispenses soap, disinfectant, etc. without touching a trigger mechanism, this dispensing should be trouble-free and also has a minimal power consumption, so that it is equipped with a battery pack , can work off-grid for a long period of time.
  • an electrically actuated dispenser for liquid or pasty goods such as disinfectants and cleaning agents, soap and ointments
  • a dispenser for the goods to be dispensed a pump connected to the dispenser and an inlet and an outlet valve for the goods to be issued, with the characteristic feature that the pump is actuated by means of an electronically controlled electromagnet.
  • Electromagnets only need a short current surge in order to be able to perform quite considerable work. With only a brief load on a battery, it is thus possible to use a lifting magnet to actuate a pump piston, the pump actuated in this way expediently being a short-stroke pump, ie the stroke of the pump is smaller than the piston diameter.
  • a hose can of course also be used ppmpe operated in this way. as well as how it is possible to use a bellows as a pump.
  • the preferred embodiment is the connection between the electromagnet and the diaphragm pump. Diaphragm pumps have the characteristic that initially only a slight pressure on the diaphragm is required, which must increase with increasing depth of indentation.
  • Electromagnets in particular the stroke quantities, have an analog characteristic, ie if the stroke magnet is switched on, it initially exerts only a small force due to the relatively large gap distance. This force becomes stronger as the gap decreases.
  • the performance curves of the diaphragm pump and solenoid therefore correspond, that is, they form an ideal combination.
  • the armature of the solenoid is expediently conical, so that a relatively large distance is available over which the magnetic field extends.
  • the lifting magnet has a pulling force of 1 - 100 N.
  • the range is preferably between 15 and 45 N.
  • the range of 1 to 2o N is suitable for dispensing small quantities, i.e. for dispensing relatively highly concentrated goods, such as disinfectants or perfume.
  • the range from 15 to 45 N meets the requirements that are generally placed on a soap dispenser that dispenses liquid or cream-like soap, whereas the upper range, i.e. the range between 5o and 100 N, is more suitable for dispensing pasty goods, one have higher viscosity.
  • the current consumption rises despite the brief actuation of an electromagnet, so that the use of batte drive-operated electromagnet becomes uneconomical.
  • the stroke length of the magnetic armature is approx. 2 to 8 mm. Above lo mm, the forces that are generated when the lifting movement begins are so small that considerable magnet sizes are required in order to achieve an effective movement at all. On the other hand, this requires more electricity, which is contrary to the task of developing an energy-saving unit.
  • a preferred embodiment of the invention provides that the pump membrane is connected to the> electromagnet via an actuating lever.
  • This actuating lever is designed as a two-armed lever, with the shorter of the two-armed lever normally being assigned to the lifting magnet and the longer one to the diaphragm. This allows the movement, i.e. the stroke on the pump, to be controlled within fairly wide limits.
  • the electromagnet is controlled by means of a proximity switch.
  • the proximity switch is advantageously a capacitive switch.
  • a proximity switch enables the non-contact dispensing of materials from the dispensing container without the need to install, for example, a foot switch, which would also ensure the hygienic conditions, but the installation of which means increased effort because it does not can be integrated into the housing of the output device. Furthermore, generally disturbing the separate installation of a switch in washrooms and toilets means cleaning the floor considerably.
  • a capacitive switch is particularly recommended because, on the one hand, the risk of misuse and damage is lower than is the case, for example, with a switch consisting of a light barrier.
  • Acoustic switches are often affected by unintentional influences, in which the source of the noise can be far outside the building, whereas the light barriers can be triggered by continuous soiling and the application of paper, for example.
  • the capacitive switch on the other hand, only responds to the change in capacitance, i.e. that it is triggered by the hand approaching the dispenser.
  • the proximity switch has a sensor circuit with two synchronously oscillating oscillators, one of which is designed as a fixed oscillator and the second can be influenced from the outside.
  • Such a circuit is designed so that both oscillators endeavor to always oscillate synchronously.
  • the circuit is very stable, i.e. that relatively large changes in capacity are required to trigger a false pulse.
  • the sensor circuit as such contains four NAND-Schmitt triggers, two of which are switched as oscillators are, of which one serves as a fixed oscillator and the other as a variable oscillator can be influenced by the sensor plate.
  • the third NAND-Schmitt trigger as a phase discriminator is expediently connected upstream of a fourth NAND-Schmitt trigger as a threshold switch with the interposition of a diode as a rectifier for the AC voltage generated in the phase discriminator, a differentiating capacitor being arranged behind the threshold switch, followed by a switching amplifier.
  • the sensor circuit advantageously has a trimmer for adjusting the circuit.
  • This trimmer which can be designed as a trimmer capacitor, serves to compensate for the tolerances that inevitably arise in the manufacture of the individual components of the circuit.
  • the response distance can be set by adjusting the sensor plate.
  • a preferred embodiment of the invention provides that a shielding electrode is arranged to be adjustable. This makes it possible to detune the variable oscillator more or less.
  • both the fixed oscillator and the variable oscillator that is to say the two first NAND-Schmitt triggers, oscillate at essentially the same frequency.
  • This frequency changes as soon as a user's hand approaches the output device of the sensor plate, that is to say that an oscillation difference then occurs between the fixed oscillator and the variable oscillator.
  • This oscillation difference is evaluated by the third NAND-Schmitt trigger as a phase discriminator, that is, an AC voltage arises at its output.
  • This alternating voltage is rectified by the diode and fed to the fourth NAND-Schmitt trigger as a threshold switch. If the voltage exceeds the threshold, a differentiating capacitor is applied, which is followed by a switching amplifier. Via this the impulse for the output reaches the electromagnet, which is excited and thereby actuates the pump membrane once, whereby the output of a metered portion of the material contained in the dispenser takes place.
  • the shielding can be varied with respect to the sensor plate.
  • electrode of the variable oscillator can be detuned in a certain range, so that a permanent defined AC voltage arises at the discriminator, which is converted by the rectifier into a DC voltage, this DC voltage, however, being below the threshold voltage of the threshold switch.
  • the change in capacitance required to trigger the sensor circuit is significantly smaller, so the response distance is increased.
  • a capacitor is connected in parallel with the current source. This advantageous arrangement also allows aging batteries to be used which have a higher internal resistance. The capacitor between the strokes is still charged and again reaches the terminal voltage of the battery, the electromotive force of which is practically constant when idling.
  • the proximity switch has a sensor circuit consisting of a CMOS IC and a sensor plate, a diode being connected between the sensor circuit and the current source and a capacitor connected in parallel with the sensor circuit.
  • the sensor plate is arranged under the housing of the dispenser, so that the capacity changes when the hand comes closer under the dispenser.
  • the current source which consists of electrochemical elements, ie either contains a set of commercially available batteries or one or more rechargeable batteries, is connected to the sensor circuit via a diode; to which a capacitor is connected in parallel.
  • This circuit achieves that the capacitor is first charged to the terminal voltage of the power source, which in turn allows the power source, that is to say the batteries, to be used to the last, since the charging of the capacitor can also take place relatively slowly.
  • the capacitor itself transfers its charge to the sensor circuit, the diode ensuring that the voltage now does not flow back to the current source.
  • a change in capacity and thus the triggering of a circuit is not only achieved by moving the hand closer, but also depends on many secondary factors.
  • the moisture content of the wall on which the dispenser was mounted is included in the capacity, and the fill level of the dispenser is also included in the capacity. It would be necessary, depending on the location of the donor, to give the donor a different capacity and also to adjust the capacity to the respective fill level. It was therefore previously thought that capacitive switches are absolutely unsuitable for such applications.
  • the output device is therefore provided with a sensor circuit which is equipped with at least one shielding electrode which is connected to the zero potential.
  • At least one shielding electrode is advantageously U-shaped.
  • shielding electrodes enable the dispenser to be installed on one side without changing the capacity in any room, So both on damp and dry walls. Furthermore, when the fill level changes in the output device, there is no longer a change in capacity.
  • the shielding electrodes extend on the one hand along the fastening side of the dispenser, i.e. parallel to the wall to which the dispenser is to be fastened, and they also extend below the dispensing container, with these two measures shielding against different wall moisture and different filling level .
  • the side walls of the dispenser are expediently also shielded, possibly also the end wall, so that even if the dispenser is touched from the side, no dispensing takes place, which is particularly advantageous when cleaning the dispenser.
  • An advantageous embodiment of the invention provides that the response distance of the proximity switch is adjustable.
  • the dispensers are typically located near the. Sinks, generally even placed directly over the sink. Especially in the latter case give the possibility that there is too little distance between the sink and proximity switch due to special structural conditions, which already results in a change in capacity. Because it is now possible to make the capacitive switch less sensitive, that is to say that the hand must be brought closer to the dispenser, it is also possible to use electrically actuatable dispensing devices there, where there is very little space, so the dispenser is very much must be brought close to a sink, for example.
  • the sensor as such is operated at a lower voltage than the electromagnet. This means that electricity consumption is also lower. If, for example, the electromagnet is operated via 5 mono cells, the current is drawn for the sensor on the third cell, i.e. the voltage is 4.5 volts.
  • a diode is connected parallel to the sensor a K onden- sator.
  • the capacitor is placed over the diode.
  • the voltage in the cells drops, i.e. when the magnet or relay is actuated, the voltage also drops towards the sensor. This is avoided by the diode, since it switches off as soon as the capacitor voltage is higher than the battery voltage.
  • the sensor is therefore fed directly from the capacitor. This capacitor could discharge back into the battery during actuation of the magnet if the diode were not interposed. Such a discharge would trigger a pumping movement, ie the sensor would again would respond and trigger the next circuit. The resulting cycle would continuously empty the soap dispenser.
  • the interposition of the diode is therefore of considerable importance.
  • a very important embodiment of the invention provides that the electronic components, the power supply and the electromagnet are arranged in a separate housing that can be separated from the output device.
  • This housing is expediently an insert which is provided with at least one catch.
  • the electromagnet When the electromagnet is actuated, the armature is moved in it. This movement must generally be transmitted to the pump diaphragm via an actuating arm. It is therefore necessary that the electromagnet is fixed absolutely rigidly in one position. It is therefore very important that the drawer, which holds all electrical or electronic units, is provided with a catch so that it can be firmly anchored in the dispenser housing.
  • Electrochemical elements are used as the power source. This includes both the commercially available batteries, for example mono cells, where several can be combined to form a set, and also accumulators which can be recharged after exhaustion. Both power sources supply a low voltage and can therefore be used safely in wet rooms. Due to the low consumption, they guarantee the donor a considerable dispensing time, which is about one year under normal use.
  • the dispenser If the dispenser is used carelessly, it can happen that soap, for example, reaches the housing from below and the capacity is thereby impaired. This is only possible if the dispenser is touched from below, i.e. the page is deliberately transported to a place where it is not wanted. In such a case, the dispenser would remain blocked after a single dispensing because of its switching, so that further dispensing would not is possible. According to a preferred embodiment of the invention, this disadvantage can be eliminated by using the sensor plate as the lower end of the dispenser housing. The sensor plate can come into contact with soap without adversely affecting the dispenser and continues to guarantee perfect function of the dispenser, even if the soap has dried on the sensor plate.
  • an additional, electrically conductive layer is applied to the bottom of the dispenser, which is made of plastic and does not require any further connection.
  • This electrically conductive layer can be applied by electroplating or vapor deposition, a sheet of metal could also be used as an additional cover.
  • the application of a conductive lacquer has proven to be particularly expedient, although all these materials must not be covered by a further dielectric.
  • the wall mounting 1 consists of a flat plate which forms the rear wall 7 and receives bores 8 which are used to screw the wall mounting 1 to a room wall.
  • the holes 8 are countersunk so that countersunk screws can be used.
  • the rear wall 7 is delimited on the right and left by side walls 59 which have a triangular shape and are angled in the lower region. Between the angled ends of the side walls 59 extends a channel-shaped holder 6, which is attached directly to the rear wall 7 and, like the guide 3,. the spring 4 and the hook-shaped extension 5 serves to receive or fasten the dispensing container 2.
  • the guide 3 is in the form of a tab which is offset inwards on the rear wall 7 by the wall thickness of the rear wall 7. In its upper region, it is separated from the rear wall 7 by free spaces 60 arranged on the right and left, so that the bridge 11, in which the guide groove 10 of the dispensing container 2 ends along its rear wall 9, surrounds the guide 3.
  • the spring 4 carries a hook-shaped extension 5 on its upper end and is an integral part of the guide 3. When the dispensing container 2 is inserted, it engages in the holding slot 12 located in the front part of the bridge 11, as a result of which the dispensing container 2 is locked in the wall fastening .
  • the dispensing container 2 has a U-shaped profile 14 on its base 13.
  • the web 16 of the U-shaped profile 14 extends parallel to the container rear wall 9 and is received by the channel-shaped holder 6 of the wall fastening 1.
  • the legs 15 of the U-shaped profile 14 arranged on the right and left of the web 16 have a triangular profile, i.e. they taper from the container rear wall 9 to the container front wall 61 and each have a bearing bore 17 in the downward-pointing tip of the triangle, while an elongated hole 18 extends parallel to the bottom 13.
  • a Module 21 Under the bottom 13 of the dispenser 2 is a Module 21 arranged, which partially penetrates the container bottom 13 and protrudes into the container interior 25. Below the inlet valve 22, the module 21 is designed as a ring extension and here forms the body of the pump 29, ie a tubular socket which is closed off by the pump membrane 56.
  • the pump membrane 56 has a pot shape. Its central base piece is reinforced, the edge encompassing the cylindrical part of the pump 29 is connected to the module 21 by a retaining spring ring 55.
  • a pump channel 3o extends from the pump 29 in the direction of the outlet valve 31.
  • a relief channel 23 is connected to this pump channel 3o and opens into an opening 28 which is located in a mandrel 27 below the knife 26.
  • the opening 28 is covered by the neck 50 of the storage container 49, so that when the pump 29 is actuated, the liquid soap is not pressed back into the container interior 25, but rather reaches the outlet valve 31 via the pump channel 30.
  • the pump diaphragm 56 is actuated via an actuating lever 19.
  • the actuating lever 19 consists of a handle 37 and a cover plate 38 which closes the entire bottom area of the soap dispenser and thus prevents the pump 29 and the outlet valve 31 from becoming dirty from the outside.
  • a pressure pad 40 is arranged, which consists of a cylindrical attachment with a flattened spherical neck. This pressure cushion 4o engages with the movement of the handle 37 on the pump membrane 56 and presses it into the module 21, as a result of which the soap located there flows out via the outlet valve 31.
  • a stop screw 41 arranged in the front area of the cover plate 38 serves to limit the movement of the handle 37 and thus to regulate the depth of penetration of the pressure cushion 4o into the pump membrane 56. This regulation adjusts the amount of soap to be dispensed.
  • the stop screw 41 is usually designed as a grub screw, which is arranged self-locking in the cover plate 38.
  • the handle 37 is mounted via articulated levers 39, which are resiliently connected to the handle 37. They carry at their ends outwardly directed stub axles 54 which engage in the bearing bores 17 of the U-shaped profile 14.
  • the cover 2.o is provided in its lower region with two hinge arms 43, on which there are pivot pins 58. This pivot pin 58 engage in the elongated holes 18 of the U-shaped profile 14, so that the cover 2o can be moved in the direction of the wall mounting 1, so that the nose 46, the recess 45 in the cover 2o loading. borders, engages behind the catch 47 of the dispensing container 2.
  • the bottom area of the. Cover 2o.iriume recess 44 forms an opening for the outlet valve 31 through which the soap exits.
  • the viewing windows 48 are located in the hood side walls 63 of the cover 20 and are only delimited on one side by the hood side wall 63.
  • the opposite limitation takes place through the wall mounting 1, i.e. the side walls 59.
  • the reservoir 49 has rectangular shape and has on one longitudinal side an outwardly projecting neck 5 0, which is covered with a foil cap 51st
  • the reservoir bottom 64 has two opposing depressions 52 which leave a web 53 in the middle. This web 53 is used for inserting the storage container 49 into the dispensing container 2, the depressions 52 allowing the web 53 to be gripped with the fingers.
  • the soap dispenser is opened by means of a lever 57, which consists of a flat material bent at one end in a crescent shape.
  • the crescent-shaped piece of the lever 57 is inserted into the recess 45 and the lever 57 is then moved upwards.
  • the lever 57 is supported on the wall (in FIG. 3 on the electronics housing lol) and lifts the nose 46 of the cover 20 from the catch 47 of the dispensing container 2, so that the cover 20 is guided in the elongated hole 18 through the pivot pin 58 , can be moved towards the operator and folded down to release the dispensing container 2.
  • the mechanism of the cover hood is similar, but has not been shown in the drawing.
  • the actuating lever 19 is designed in this case as a double lever, that is equipped with two arms, of which one arm, as before, carries the pressure cushion 4o, which acts on the pump diaphragm 56, whereas the second arm is acted upon by the magnet armature 7o of the electromagnet 65.
  • the electromagnet 65 is permanently installed in the rear area of the electronics housing lol, next to it is the circuit board lo4, which receives the electronics units for controlling the electromagnet 65.
  • the lever side of the actuating lever 19, which carries the pressure cushion 4o, has an extension lo5, in the front area of which the return spring 66 is arranged.
  • This return spring 66 essentially has the task of balancing the weight of the magnet armature 7o and thereby largely relieving the pressure on the pump diaphragm 56.
  • the sensor plate 71 is arranged on the bottom of the pocket lo8 of the electronics housing lol. Above it is the shielding electrode 69, which shields the sensor plate 71 from being influenced by the level of the soap in the storage container 49. Screws, not shown, are passed through the mounting holes lo9 and are used to attach the electronics housing lol to a house wall or the like.
  • the pocket lo8 is provided in its lower region with a conductive layer llo, which prevents the soap dispensing from the dispenser from being impaired by dirtying the underside of the pocket.
  • the insert 68 which is inserted vertically from above into the electronics housing 101 , contains the power source, that is to say the electrochemical elements 72. These electrochemical elements are shown as monocells in FIG. 9, but rechargeable batteries can also be used instead.
  • the insert 68 is inserted via the contact springs 111 electrically connected to the electronics housing lol, which, as Fig.lo shows, has contact springs 111. There is a different voltage between the individual contact springs 111, since the electromagnet 65 must be operated at full voltage in order to provide the required power, but the proximity switch 67 as such can be operated at a lower voltage, which saves electricity.
  • the proximity switch 67 is composed of the circuit board lo4, the connecting capacitor 98, and the sensor plate.71, which are housed in the electronics housing lol according to FIG.
  • An adjusting screw 112 made of insulating material enables the response distance to be adjusted by adjusting the height of the shielding electrode 69 in the pocket lo8. the distance at which the dispenser dispenses soap when the hand approaches the dispenser, ie in the area of the sensor plate 71.
  • Receiving holes 113 are used to screw the dispensing container 2 to the electronics housing lol. They are arranged in lugs 114, which are part of the rear side lo7 of the electronics housing.
  • Fig. 7 and Fig. 8 as shown, the electrical parts were encapsulated in that they were enclosed by the electronics housing lol forward, that is to the soap dispenser side, so that they could only be reached from the wall side.
  • Fig. Lo shows the alternative solution here, that is, all electrical parts are arranged on the back lo7 of the electronics housing lol and thus openly accessible from the front.
  • the cover opposite the soap dispenser takes place through the insert 68, as shown in FIG. 11, and its front side 115 except for the opening lo6, through which the actuating lever 19. engages the electromagnet 65 and the elongated holes 116 is completely closed.
  • Figures 12 and 13 show another pairing. of electronics housing lol and insert 68, here the insert 68 accommodates all the electrical or electronic parts that require maintenance. These are, on the one hand, the electrochemical elements 72, which have to be recharged or replaced, on the other hand, the circuit board lo4, which may need to be checked, the der.Electromagnet 65 and the connecting capacitor 98. Since the electromagnet 65 is always opposite the actuating lever 19 the insert 68 is locked in its position if it has to assume a fixed, not changing position, if an equal delivery quantity is to be brought about by the pump movement. The locking takes place in the right and left wing 117 of the electronics housing lol.
  • the electronics housing lol By introducing latching windows lo3 and by resilient tabs 119 arranged on the insertion side walls 118, which spring outwards from the insertion side wall 118 and thus engage in the latching windows lo3 of the electronics housing lol.
  • these resilient tabs 119 When inserting the insert 68 into the electron housing lol, these resilient tabs 119 are pressed inward and only come out again at the catch window 103, where they lock the insert 68 in the intended position.
  • the electronics housing lol only has parts in the area of the pocket lo8 that are connected to the proximity switch 67 via the shielding contact 12o and the sensor contact 121.
  • F ig. 14 shows the circuit diagram of the proximity switch 67, that is to say essentially the wiring of the units which are arranged on the circuit board lo4.
  • the sensor plate 71 is connected to the variable oscillator 79 via a fixed capacitor 76, which is used to separate the DC voltage.
  • This variable oscillator 79 is designed as a feedback NAND-Schmitt trigger.
  • the resistor 78 serves as a feedback resistor and at the same time for setting the frequency. Furthermore, the frequency is set via the frequency setting capacitor 73.
  • the frequency setting of the fixed oscillator 80 is carried out analogously by the fixed capacitor 75 to limit the range of the fixed oscillator 80 and the trimmer capacitor 74.
  • a resistor 77 is used to discharge the static charge of the sensor electrode.
  • the electrochemical element 72 Five monocells, each with a voltage of 1.5 volts, are used as the electrochemical element 72, so that the entire electrochemical element 72 has an operating voltage of 7.5 volts.
  • the voltage is branched off behind the third cell and fed via the supply diode 97 to the parallel IC capacitor 96, which is connected to the positive supply point 122 of the IC.
  • the outputs of the two oscillators 79, 80 are connected to the two inputs of the third NAND-Schmitt trigger, which is connected as a phase discriminator 81.
  • the resulting low-frequency voltage and the filter capacitor 83 lead via the filter resistor 82.
  • the separating capacitor 84 is applied, behind which the short-circuit diode 86 for the negative half-wave and the rectifier diode 85 for the NAND-Schmitt trigger 88 'is arranged.
  • the NAND-Schmitt trigger 88 is connected to ground via the load resistor 89 and also has a connection to the measuring point M, which is used to level the device.
  • a charging capacitor 87 is connected in parallel to the short-circuit diode 86 and is arranged in front of the NAND-Schmitt trigger 88, which is followed by the charging resistor 9o and the differentiating capacitor 91. are.
  • the differentiating capacitor 91 is connected to the discharge resistor 92 and the feedback capacitor 93, which acts on the electromagnet 65 via the driver transistor 99 and the power transistor 100.
  • the diode 95 is connected to short-circuit voltage peaks when switching off.
  • the connecting capacitor 98 is arranged parallel to the electrochemical element 72, so that the electromagnet 65 is always supplied with the full voltage when the power transistor 10 is activated.
  • the base of the power transistor 100 and the driver transistor 99 are connected to ground via an emitter resistor 94.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Valve Device For Special Equipments (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Reciprocating Pumps (AREA)
EP83108248A 1982-08-26 1983-08-22 Distributeur commandé électriquement Expired EP0104422B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108248T ATE23431T1 (de) 1982-08-26 1983-08-22 Elektrisch betaetigbare ausgabevorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3231806A DE3231806C2 (de) 1982-08-26 1982-08-26 Elektrisch betätigbare Ausgabevorrichtung
DE3231806 1982-08-26

Publications (3)

Publication Number Publication Date
EP0104422A2 true EP0104422A2 (fr) 1984-04-04
EP0104422A3 EP0104422A3 (en) 1985-01-16
EP0104422B1 EP0104422B1 (fr) 1986-11-12

Family

ID=6171783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108248A Expired EP0104422B1 (fr) 1982-08-26 1983-08-22 Distributeur commandé électriquement

Country Status (3)

Country Link
EP (1) EP0104422B1 (fr)
AT (1) ATE23431T1 (fr)
DE (2) DE3231806C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4722372A (en) * 1985-08-02 1988-02-02 Louis Hoffman Associates Inc. Electrically operated dispensing apparatus and disposable container useable therewith
US4989755A (en) * 1988-12-20 1991-02-05 Shiau Guey Chuan Automatic cleaning-liquid dispensing device
DE3902476A1 (de) * 1989-01-27 1990-08-02 Feldmuehle Ag Ausgabevorrichtung fuer fluessige oder pastoese gueter
DE102007060130A1 (de) * 2007-12-15 2009-06-18 Venoplas Ag Flüssigkeitsspender

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US3434628A (en) * 1967-01-23 1969-03-25 Bernard A Ceraldi Automatic soap dispenser
FR2263643A1 (en) * 1974-03-05 1975-10-03 Faeam Capacitive proximity alarm - uses capacitor between ground and amplifier input point
IT1006432B (it) * 1974-04-12 1976-09-30 Bassani Spa Mezzi di installazione e prote zione particolarmente per inter ruttori di prossimita o simili
GB2054151A (en) * 1979-07-06 1981-02-11 Watford Electric Co Ltd Proximity Switch
US4316555A (en) * 1980-03-03 1982-02-23 Steiner Corporation System for dispensing fluids
DE3036523C2 (de) * 1980-09-27 1983-03-24 Feldmühle AG, 4000 Düsseldorf Ausgabevorrichtung für flüssige oder pastöse Güter

Also Published As

Publication number Publication date
EP0104422B1 (fr) 1986-11-12
DE3367509D1 (en) 1987-01-02
DE3231806A1 (de) 1984-03-01
EP0104422A3 (en) 1985-01-16
ATE23431T1 (de) 1986-11-15
DE3231806C2 (de) 1984-06-14

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