EP0104422B1 - Distributeur commandé électriquement - Google Patents

Distributeur commandé électriquement Download PDF

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Publication number
EP0104422B1
EP0104422B1 EP83108248A EP83108248A EP0104422B1 EP 0104422 B1 EP0104422 B1 EP 0104422B1 EP 83108248 A EP83108248 A EP 83108248A EP 83108248 A EP83108248 A EP 83108248A EP 0104422 B1 EP0104422 B1 EP 0104422B1
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EP
European Patent Office
Prior art keywords
dispenser
sensor circuit
dispenser according
pump
sensor
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
Application number
EP83108248A
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German (de)
English (en)
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EP0104422A3 (en
EP0104422A2 (fr
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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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; 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 operated dispensing device for liquid or pasty goods, such as disinfectants and cleaning agents, soap and ointments, which consists of a dispensing container for the dispensing goods, a pump connected to the dispensing container and an inlet and an outlet valve for the dispensing goods .
  • Dispensing devices of the aforementioned type are known, for example, from US-A-3 327 901 and DE-A-3 036 523 and have also proven themselves well in practice. With these units, however, manual operation is still required, i. H. the dispenser must be operated with a lever for dispensing, which is undesirable for areas where increased hygienic requirements are made.
  • a soap dispenser with proximity switch is known that meets this requirement, i. that is, when an object approaches, for example, the hand to the dispenser, a motor is switched on, which pumps out a predetermined amount of soap from the container.
  • the motor is controlled by a switching device that reacts to fast movement 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 biggest disadvantage of the device is the circuit's susceptibility to interference. Acoustic fields are very easily influenced by vibrations that come from machines, electrical fields, however, by inrush currents or by the voltage changes that occur when machines are switched on or off. For example, it was observed that a dispenser of this type was installed in a washroom next to a machine shop. dispensed soap with every cycle of an automatic spray gun and thus emptied completely within 24 hours.
  • a dispenser which essentially consists of a piston pump which is arranged in a housing and which is actuated by an electromagnet via a transmission.
  • the electromagnet is controlled by a light barrier.
  • the light barrier is arranged in the housing of the soap dispenser, so that the user has to get very close to the device with his hands and there is a risk that he will touch the device in the area of the dispensing nozzle, the light source or the photocell. For the hygienic requirements of an operating room, this does not ensure that the surgeon does not touch the donor and thus transmit germs to his hands.
  • a soap dispenser is also known which is connected to the normal household electrical system and which has a proximity switch which actuates a solenoid valve. If one disregards the fact that the usual household voltages, i.e. 110 to 220 volts, are very dangerous in wet rooms, the problem arises again of the unequal output quantities, which are given by the respective fill level in the container, since the output with this type of valve is only through the force of gravity takes place, the quantity output also depends on the temperature by which the respective viscosity is determined.
  • the present invention is therefore based on the object of creating a donor. who dispenses soap, disinfectant, etc. without touching a trigger mechanism, this dispensing should be trouble-free and in a defined amount, which also has a minimal power consumption, so that it can be equipped with a battery set and work over a long period of time independently of the mains.
  • an electrically operated dispensing device 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 output, in which the pump is controlled by a capacitive proximity switch, with the characteristic features that the proximity switch has a sensor circuit
  • the sensor circuit contains four NAND-Schmitt triggers, two of which are connected as oscillators, one of which serves as a fixed oscillator , the other as a variable oscillator can be influenced by the sensor plate
  • the third NAND-Schmitt trigger as a phase discriminator with the interposition of a diode is connected upstream of the fourth NAND-Schmitt trigger as a threshold switch
  • the sensor circuit also consists of a CMOS-IC and a sensor plate, being between Sensor circuit and current source a diode and a capacitor is connected in parallel to the sensor circuit.
  • 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, the pump actuated in this way being a short-stroke 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 solenoids have an analog characteristic, i. that is, when the solenoid 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, i.e. 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 tensile force of 1-100 N.
  • the range is preferably between 15 and 45 N.
  • the range from 1 to 20 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 50 and 100 N, is more suitable for dispensing pasty goods, the higher Have viscosity. Above 100 N, the current consumption rises despite the brief actuation of an electromagnet, so that the use of battery-operated electromagnets becomes uneconomical.
  • the stroke length of the magnetic armature is approx. 2 to 8 mm. Above 10 mm, the forces that are generated when the stroke movement is started are so small that considerable magnet sizes are required to bring about 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 control of the electromagnet by a proximity switch enables the non-contact dispensing of materials from the dispensing container without it being necessary, e.g. B. to install a foot switch, which would also ensure the hygienic conditions, but its installation means an increased effort because it can not be integrated into the housing of the dispenser. Furthermore, the separate installation of a switch in washrooms and toilets generally disrupts floor cleaning.
  • 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 responds only to the change in capacitance, i. that is, it is triggered by hand approaching the dispenser.
  • the invention provides that 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 therefore very stable, which means that relatively large changes in capacitance are required to trigger a false pulse.
  • the sensor circuit as such contains four NAND-Schmitt triggers, two of which are connected as oscillators, one of which serves as a fixed oscillator and the other as a variable oscillator which can be influenced by the sensor plate.
  • the third NAND-Schmitt trigger. is connected upstream of a fourth NAND-Schmitt trigger as a threshold switch, with a diode interposed 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 proximity switch has a sensor circuit which consists 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 ensures that the capacitor is first charged to the terminal voltage of the current source, which in turn allows the use of the current source, that is to say the batteries, to the last, since the capacitor can also be charged 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.
  • 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 a user's hand approaches the sensor plate dispenser, i. that is, 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, i. 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.
  • variable oscillator can be detuned within a certain range by means of a shielding electrode that can be varied with respect to the sensor plate, so that a permanent, defined alternating voltage arises at the discriminator, which is converted by the rectifier into a direct voltage, but this direct voltage is below the threshold voltage of the threshold switch.
  • the change in capacitance required to trigger the sensor circuit is significantly smaller, so that 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.
  • a change in capacity and thus the triggering of a circuit is not only achieved by approaching the hand, but also depends on many secondary circumstances.
  • 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 output device to be installed without changing the capacitance other rooms, i.e. 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 design of a shielding electrode in a U-shaped design simplifies the construction of the entire unit, since the U-shaped design simultaneously shields three sides, so that only one connection to the zero potential is required for three sides.
  • 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, if appropriate 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.
  • a shielding electrode which is made up of several parts, shields the entire lower area of the dispenser to the sides and upwards, so that a change in capacity can only be brought about by bringing the hand closer to 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 wash basins, generally even directly above the wash basins. In the latter case in particular, there may be the possibility that the distance between the wash basin and the proximity switch is too small due to special structural conditions, which already results in a change in capacity.
  • the fact that 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 makes it possible to also use electrically actuatable dispensing devices where there is very limited space, that is to say the dispenser is very close at z. B. a sink must be brought up.
  • the sensor as such is usually operated with 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 delivered to the sensor on the third cell, i. H. the voltage is 4.5 volts.
  • a diode is connected between this tap and the sensor, and a capacitor in parallel with the sensor.
  • the capacitor is charged via 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 motion, i.e. that is, the sensor would respond again 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. This requires that the electromagnet is fixed absolutely rigid in one position. It is therefore very important that the drawer, which receives 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 current 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 a considerable dispensing time for the donor, which is about one year under normal use.
  • the dispenser is used carelessly, the case may arise that e.g. B. Soap gets from below to the housing and the capacity is affected. This is only possible if the dispenser is touched from below, i.e. the soap is deliberately transported to a place where it is not wanted. In such a case, the donor would issue a one-off because of its circuit remain blocked so that further spending is not possible.
  • 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 has the shape of a tab, which is arranged 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 at its upper end a hook-shaped projection 5 and is an integral part of the guide 3. It engages when the dispensing container 2 is inserted into 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 which are arranged on the right and left of the web 16 have a triangular profile, i. H. 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 is arranged under the bottom 13 of the dispensing container 2, which partially penetrates the container bottom 13 and projects into the container interior 25.
  • the module 21 is designed as a ring approach and here forms the body of the pump 29, i. H. a tubular nozzle which is closed 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 30 extends from the pump 29 in the direction of the outlet valve 31.
  • a relief channel 23 is connected to this pump channel 30 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 on the cover plate 38 and consists of a cylindrical attachment with a flattened spherical extension. This pressure cushion 40 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 40 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 soap dispenser should be actuated with the arm, for which purpose the actuating lever 19 is extended by spacers 42 so that the spacers 42 connect the handle 37 to the cover plate 38 and the articulated lever 39.
  • the cover 20 is provided in its lower region with two hinge arms 43, on which there are pivot pins 58.
  • pivot pins 58 engage in the elongated holes 18 of the U-shaped profile 14 so that the cover 20 can be moved in the direction of the wall mounting 1, so that the nose 46, which delimits the recess 45 in the cover 20, behind the catch 47 of the dispensing container 2 engages.
  • the recess 44 located in the bottom area of the cover 20 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 is made by the wall mounting 1, d. H. the side walls 59.
  • the storage container 49 has a cuboid shape and has on one long side an outwardly projecting neck 50, which is covered with a film cap 51.
  • 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 101) and lifts the nose 46 of the cover 20 out of the catch 47 of the dispensing container 2, so that the cover 20 is guided in the slot 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 carries the pressure cushion 40, which acts on the pump diaphragm 56, as before, whereas the second arm is acted upon by the magnet armature 70 of the electromagnet 65.
  • the electromagnet 65 is permanently installed in the rear area of the electronics housing 101, next to it is the circuit board 104, which receives the electronics units for controlling the electromagnet 65.
  • the lever side of the actuating lever 19, which carries the pressure cushion 40, has an extension 105, 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 70 and thereby largely relieving the pressure on the pump diaphragm 56.
  • FIGS. 7 and 8 Since all electrical components should be completely separated from the wet part of the soap dispenser if possible, they are encapsulated, as shown in FIGS. 7 and 8. In the simplest form, this can be done in that the electronics housing 101 is closed towards the front and has only one opening 106, above which the electromagnet 65 is located and into which the actuating lever 19 engages. In this embodiment, as shown in FIG. 7, the electromagnet 65 is accessible from the rear 107 of the electronics housing 101, as is the circuit board 104 and the connecting capacitor 98.
  • the sensor plate 71 is arranged on the bottom of the pocket 108 of the electronics housing 101. Above it is the shielding electrode 69 shields the sensor plate 71 from being influenced by the level of the soap in the reservoir 49. Screws, not shown, are guided through the fastening bores 109 and are used for fastening the electronics housing 101 to a house wall or the like.
  • the pocket 108 is provided in its lower region with a conductive layer 110, 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 current source, that is to say the electrochemical elements 72. These electrochemical elements are shown as mono cells in FIG. 1, but rechargeable batteries can also be used instead.
  • the insert 68 is electrically connected via the contact springs 111 to the electronics housing 101, which, as shown in FIG. 10, 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 104, the connecting capacitor 98 and the sensor plate 71, which are accommodated in the electronics housing 101 according to FIG. 10.
  • An adjusting screw 112 made of insulating material enables adjustment of the response distance, i.e. adjusting the height of the shielding electrode 69 in the pocket 108. H. the distance at which the dispenser dispenses soap when the hand approaches the dispenser, ie in the area of the sensor plate 71.
  • Receiving bores 113 serve to screw the dispensing container 2 to the electronics housing 101. They are arranged in lugs 114 which are part of the rear side 107 of the electronics housing 101.
  • Fig. 7 and Fig. As shown, the electrical parts were encapsulated in that they were enclosed by the electronics housing 101 to the front, that is to the soap dispenser side, so that they could only be reached from the wall side. 10 shows the alternative solution, i. H. all electrical parts are arranged on the rear side 107 of the electronics housing 101 and are thus openly accessible from the front.
  • the cover with respect to the soap dispenser is provided by the insert 68, as shown in FIG. 11 and its front side 115, except for the opening 106, through which the actuating lever 19 engages the electromagnet 65 and the elongated holes 116 are completely closed.
  • the electronics housing 101 only has parts in the area of the pocket 108, which are connected to the proximity switch 67 via the shielding contact 120 and the sensor contact 121.
  • the 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 104.
  • 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 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 mono cells, 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; to separate high-frequency residues, the isolating 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 are 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 arranged in front of the NAND-Schmitt trigger 88, which is followed by the charging resistor 90 and the differentiating capacitor 91.
  • 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 capacitor 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 100 responds.
  • the base of the power transistor 100 and the driver transistor 99 are connected to ground via an emitter resistor 94.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Valve Device For Special Equipments (AREA)
  • Reciprocating Pumps (AREA)

Claims (13)

1. Dispositif distributeur pouvant être actionné électriquement pour produits liquides ou pâteux tels que des produits de nettoyage et de désinfection, du savon et des pommades, comprenant un récipient distributeur (2) pour les produits à distribuer, une pompe (29) reliée audit récipient et une vanne d'admission (22) et une vanne de sortie (31) pour les produits à distribuer, la pompe étant commandée au moyen d'un détecteur de proximité capacitif (67), caractérisé par le fait que le détecteur de proximité (67) comprend un circuit de détection, que le circuit de détection comprend quatre bascules de Schmitt NON-ET, deux de ces bascules étant montées sous forme d'oscillateurs (79, 80) dont l'un sert d'oscillateur fixe (80) tandis que l'autre sert d'oscillateur variable (79) pouvant être influencé par la plaque de détection (71), la troisième bascule de Schmitt NON-ET étant montée, en tant que discriminateur de phase (81), avec une diode (85) intercalée en avant de la quatrième bascule de Schmitt NON-ET servant d'interrupteur à seuil (88), le circuit détection comprenant en outre un CMOS-IC et une plaque de détection (71), une diode (97) étant montée entre le circuit de détection et la source de courant (72) et un condensateur (96) étant monté en parallèle avec le circuit de détection.
2. Dispositif distributeur selon la revendication 1, caractérisé par le fait que la pompe (29) est une pompe à membrane.
3. Dispositif distributeur selon la revendication 1 ou 2, caractérisé par le fait que les composants électroniques, l'alimentation en énergie et l'électro-aimant (65) sont disposés dans un boîtier distinct, pouvant être séparés du dispositif distributeur.
4. Dispositif distributeur selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que des éléments électrochimiques sont utilisés comme source de courant.
5. Dispositif distributeur selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que le détecteur de proximité (67) est équipé d'un élément ajustable servant à accorder le circuit.
6. Dispositif distributeur selon l'une des revendications 1 à 5, caractérisé par le fait que la distance de réponse du détecteur de proximité (67) est réglable.
7. Dispositif distributeur selon l'une des revendications 1 à 6, caractérisé par le fait que le détecteur de proximité (67) comprend un circuit de détection comprenant deux oscillateurs (79, 80) synchronisés dont l'un est réalisé sous la forme d'un oscillateur fixe (80) et l'autre sous la forme d'un oscillateur (79) pouvant être influencé de l'extérieur.
8. Dispositif distributeur selon l'une des revendications 1 à 7, caractérisé par le fait que derrière l'interrupteur à seuil (88) est disposé un condensateur différentiel (91) à la suite duquel est monté un amplificateur de commutation.
9. Dispositif distributeur selon l'une quelconque des revendications 1 à 8, caractérisé par le fait que la plaque de détection (71) constitue la partie terminale inférieure du dispositif distributeur.
10. Dispositif distributeur selon l'une quelconque des revendications 1 à 9, caractérisé par le fait que le circuit de détection est équipé d'au moins électrode de blindage (69) qui est branchée au potentiel zéro.
11. Dispositif distributeur selon l'une des revendications 1 à 10, caractérisé par le fait qu'une électrode de blindage (69) est réalisée en forme de U.
12. Dispositif distributeur selon l'une des revendications 1 à 11, caractérisé par le fait qu'une électrode de blindage (69) est disposée de manière mobile.
13. Dispositif distributeur selon l'une quelconque des revendications 1 à 12, caractérisé par le fait que le fond du dispositif distributeur est muni d'une couche conductive (110).
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 EP0104422A2 (fr) 1984-04-04
EP0104422A3 EP0104422A3 (en) 1985-01-16
EP0104422B1 true 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007060130A1 (de) * 2007-12-15 2009-06-18 Venoplas Ag Flüssigkeitsspender

Families Citing this family (3)

* 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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327901A (en) * 1963-12-13 1967-06-27 Jet Dispenser Corp Dispenser
US3273752A (en) * 1965-02-11 1966-09-20 Geza E Horeczky Photo-electric controlled dispenser
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007060130A1 (de) * 2007-12-15 2009-06-18 Venoplas Ag Flüssigkeitsspender

Also Published As

Publication number Publication date
EP0104422A3 (en) 1985-01-16
EP0104422A2 (fr) 1984-04-04
ATE23431T1 (de) 1986-11-15
DE3367509D1 (en) 1987-01-02
DE3231806A1 (de) 1984-03-01
DE3231806C2 (de) 1984-06-14

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