DE2126967B

DE2126967B - Device for automatic dosing of specified amounts of liquid

Info

Publication number: DE2126967B
Authority: DE
Inventors: Walter 2000 Hamburg Leifermann
Original assignee: Polomat Getränke-Automaten GmbH & Co, 2000 Hamburg

Description

Die Arbeitsweise der erfindungsgemäß ausgebildeten Vorrichtung zur automatischen Dosierung von vorgegebenen Flüssigkeitsmengen ist wie folgt: Der The operation of the device designed according to the invention for automatic dosing of specified amounts of liquid is as follows: The

Vorratsbehälter 10 wird nach dem Füllen geschlossen und mit der Luftleitung 13 verbunden. Der Flüssigkeitsspiegel der FlüssigkeitF kann irgendeine beliebige Höhe aufweisen. Das Luftventil 14 ist stromlos geöffnet, so daß im Flüssigkeitsbehälter 10 der gleiche Luftdruck wie in der Umgebung herrscht. Die Membran 17, die aus einem leichten luftundurchlässigen Material besteht, hängt durch ihr Eigengewicht entspannt in einem Bogen nach unten, wie dies aus der Zeichnung ersichtlich ist. Die Lichtschranke 19 wird durch den Steuerstab 30 unterbrochen. Gleichzeitig ist das Auslaßventil 12 stromlos geschlossen: Die Flüssigkeit kann aus dem Behälter 10 nicht heraustreten.Storage container 10 is closed after filling and with the air line 13 connected. The liquid level of the liquid F can be any Have height. The air valve 14 is normally open, so that in the liquid container 10 the air pressure is the same as in the surrounding area. The membrane 17, which consists of a consists of light, air-impermeable material, hangs relaxed by its own weight in an arc downwards, as can be seen from the drawing. The light barrier 19 is interrupted by the control rod 30. At the same time is the exhaust valve 12 normally closed: the liquid cannot escape from the container 10.

Wird der Schalter 23 betätigt, so löst die Steuereinrichtung 20 die Ausgabeeinrichtung aus, indem die Lichtschranke 19 eingeschaltet wird, wobei gleichzeitig das Auslaßventil 12 und das Luftventil 14 stromführend werden, was zur Folge hat, daß das Luftventil 14 schließt und das Auslaßventil 12 öffnet. Die 3Dilüssigkeit F tritt somit aus den Ablaufstutzen 11 heraus.If the switch 23 is actuated, the control device 20 triggers the Output device in that the light barrier 19 is switched on, at the same time the outlet valve 12 and the air valve 14 are energized, which has the consequence, that the air valve 14 closes and the outlet valve 12 opens. The 3 fluid F thus emerges from the outlet nozzle 11.

Durch das Austreten von Flüssigkeit F aus dem Behälter 10 ergibt sich im Behälter 10 ein Volumenschwund. Dieser Volumenschwund wird durch Anheben der Membran 17 ausgeglichen. Ist die gewünschte bzw. vorgegebene Flüssigkeitsmenge ausgetreten, so gibt der Steuerstab 30 der Membran 17 die Lichtschranke 19 frei, da die Membran 17 zum Ausgleich des auftretenden Volurnenschwunds in dem Behälter 10 angehoben wird. Der dabei auftretende Lichtimpuls bewirkt ein Abschalten der Steuereinrichtung 20, die gleichzeitig die Schließung des Auslaßventils 12 steuert, wodurch der Flüssigkeitsstrom unterbrochen wird, während gleichzeitig das Luftventil 14 geöffnet wird. In der geöffneten Stellung des Luftventils 14 strömt die Außenluft durch die Luftleitung 13 einmal in den Behälterinnenraum und zum anderen über die Abzweigleitung 15 in den von der Membran 17 gebildeten Innenraum 18, was zur Folge hat, daß die Membran 17 vom Steuerstab 30 in ihre Ausgangsstellung zurückgezogen wird und der Steuerstab 30 im Bereich der Lichtschranke zu liegen kommt. Ein erneutes Betätigen des Schalters 23 bewirkt wiederum den gleichen, vorangehend beschriebenen Arbeitsablauf. Bei stets der gleichen ausgegebenen Flüssigkeitsmenge hat sich somit die Membran 17 um den gleichen Betrag gehoben und mittels des Steuerstabes 30 die Steuereinrichtung 20 ausgeschaltet. The emergence of liquid F from the container 10 results There is a loss of volume in the container 10. This loss of volume is caused by lifting the membrane 17 balanced. Is the desired or specified amount of liquid emerged, the control rod 30 of the membrane 17 releases the light barrier 19, because the membrane 17 to compensate for the volume shrinkage occurring in the container 10 is raised. The resulting light pulse causes the Control device 20, which simultaneously controls the closure of the exhaust valve 12, whereby the liquid flow is interrupted while at the same time the air valve 14 open will. In the open position of the air valve 14, the outside air flows through the air line 13 once into the interior of the container and on the other hand via the Branch line 15 into the interior space 18 formed by the membrane 17, with the result has that the membrane 17 is withdrawn from the control rod 30 in its initial position and the control rod 30 comes to rest in the area of the light barrier. Another Pressing the switch 23 again has the same effect as described above Workflow. With the same amount of liquid dispensed, the membrane 17 raised by the same amount and by means of the control rod 30 the Control device 20 switched off.

Wird mit dem Auslösevorgang gleichzeitig ein Zeitschalter 26 eingeschaltet, der jeweils so lange läuft, wie die beiden Ventile 12 und 14 stromttihrend sind, so kann dieser Zeitsc'nalter auf einfache Weise eine Leermeldung geben, wenn das Anheben der Membran 17 nicht in einer vorgegebenen Maximalzeit erfolgt ist. Eine weitere Möglichkeit für eine Leeranzeige besteht darin, daß eine zweite in der Zeichnung nicht dargestellte Lichtschranke im Bereich des Steuerstabes 30 der Membran 17 angeordnet ist und deren Ruhestellung überwacht. In dem Fall, in dem die FlüssigkeitF völlig aus dem Behälter 10 ausgetreten ist, findet der Luftausgleich über das Auslaßventil 12 statt, und die Membran 17 sinkt während der Ausgabe in die Ausgangsstellung zurück. If a timer 26 is switched on at the same time as the release process, which runs as long as the two valves 12 and 14 are current feeding, so this timer can easily give an empty message if that The membrane 17 has not been raised in a predetermined maximum time. One Another possibility for a blank display is that a second one in the drawing The light barrier (not shown) is arranged in the area of the control rod 30 of the membrane 17 and their rest position is monitored. In the case where the liquid F is completely has emerged from the container 10, the air balance takes place via the outlet valve 12 instead, and the membrane 17 sinks back into the starting position during dispensing.

Um auch verschiedene Flüssigkeitsmengen dosieren zu können, ist die Lichtschranke 19 in ihrem Abstand von dem Steuerstab 30 der Membran 17 veränderbar ausgebildet. In order to be able to dose different amounts of liquid, the The distance between the light barrier 19 and the control rod 30 of the membrane 17 can be changed educated.

Claims

Claims: 1. Device for automatic dosing of predetermined Liquid quantities at which the liquid to be dosed receives, closed trained container has a liquid drainage port with an outlet valve and with an air line opening into the upper space above the liquid is provided with an air valve in which a branch line is connected, whose free end is a carrier plate with one at the free end of the branch line connected on the opposite side, the membrane sags due to its own weight and its opening with that enclosed by the carrier plate and the membrane Interior is connected, the sagging section in the area of a light barrier is arranged, which via a control device with an actuating switch in There is an operative connection via the air valve in the air line and the outlet valve depending on the size of the slightest change in air pressure in the Container above the liquid caused mechanical change or Deformation of the membrane are controllable, according to patent 2049784, characterized e t that the membrane (17) carries a control rod (30) on its underside, which in the Area of the light barrier (19) is arranged.

2. Apparatus according to claim 1, characterized in that the control rod (30) attached in the middle of the membrane (17) and made from a blank of cardboard, Plastics or metallic materials.

3. Apparatus according to Claiml and 2, characterized in that the control rod (30) is designed as a weight.

The patent 2049784 relates to a method and an apparatus for automatic dosing of specified amounts of liquid, with which the to be dosed Liquid-receiving, closed-design container has a liquid drainage port with an outlet valve and with one in the upper space above the liquid opening air line is provided with an air valve into which a branch line is switched on, the free end of which is a carrier plate with one to the free Connected to the end of the branch line facing away, by its own weight has sagging membrane and its opening with that of the support plate and the inner space enclosed by the membrane is connected, the sagging portion of which is arranged in the area of a light barrier, which via a control device with an operating switch is in operative connection, via which the air valve in the Air line and the exhaust valve depending on the size of the smallest Change in air pressure in the container above the liquid mechanical change or deformation of the membrane are controllable.

The aim of the present invention is to provide the device according to the To improve the main patent relating to a faster beverage dispensing sequence. To the This problem is solved by a device for the automatic dosing of given Proposed amounts of liquid, which is designed according to the invention in such a way that that the membrane carries a control rod on its underside, which is located in the area of the light barrier is arranged. The control rod consists of a blank made of cardboard, cardboard, plastics or metallic materials and can according to a further feature of the invention be designed as a weight.

By using a control rod on the underside of the membrane an exact application of the light barrier is effected. Is also the Control rod is still designed as a weight, then the membrane is faster in the The area of the light barrier is pulled down, which results in the dosed beverage being dispensed is increased significantly in the unit of time.

In the drawing is an embodiment of the invention trained device for automatic dosing of predetermined amounts of liquid shown.

The metering device designed according to the invention consists of one the container 10 which is closed on all sides and which receives the liquid F to be dosed with a discharge nozzle 11, preferably arranged at the bottom, which has an outlet valve 12 carries. The air-filled space above the liquid F in the container 10 is marked with L.

The container 10 has an air line 13, which in the upper The air space of the container 10 opens and its free end 13 a carries an air valve 14. The outlet valve 12 and the air valve 14 are preferably electromagnetic Control valves formed.

In the air line 13, a branch line 15 is turned on, the free end 15 a has a support plate 16, at the free end 15 a of which Abzweigleitungl5 remote side a membrane 17 is arranged such that this sags due to its own weight and one from the inner wall of the membrane 17 and the carrier plate 16 forms a closed space 18, which via the opening 15 b the branch line 15 is connected to the air line 13. The membrane 17 consists of airtight, thin film.

On the underside of the membrane 17 is a control rod 30, preferably attached in the middle, made from a blank made of cardboard, cardboard, plastics or metallic materials and is hanging down. Preferably the Control rod 30 designed as a weight, with the property, the membrane 30 from a attracted position to pull down when the membrane 17 attracting medium no longer acts on the membrane 17.

A light barrier 19 is arranged in the area of the control rod 30, which is connected to a control device 20 via lines 21, 22 and with an actuating switch 23 is in operative connection. In addition, the control device 20 via a connecting line 24 to the outlet valve 12 and via another Connecting line 25 is connected to the air valve 14.