DE2950870A1 - Electronic water vol. meter for coffee machine - has paddle wheel rotated by water flow emitting angular position pulse trains for summing circuit coacting with comparator - Google Patents

Abstract

A primary component (MV) rotated by the water flow, converts a series of angular offsets into an electronic pulse train (TR). The pulses are added in a summing circuit. An electronic comparator circuit, with a programmable and adjustable threshold, transmits an analog signal when a preset threshold has been attained in the summing circuit. The analog signal actuates an electric three-way valve (EL) in such manner that it moves from a first position supplying the coffee brewing water, into a second position interrupting the flow and connecting the machine to ambient air. Pref. an opto-electronic paddle wheel forms the primary component. Alternately, it is in the form of a proximity switch. A resetting feedback may be used for automatic zeroing of the summing circuit after a finished coffee machine cycle.

Description

Electronic water volume measuring device in particular

fttr coffee machines.

Priority: Devices that control the drainage water, especially for coffee machines; dimensioned, are already known from various designs. Through these devices is it allows more or less water to the pouring unit according to the taste of the To deliver to customers, There is a disadvantage of the known devices in that they are entangled from a mechanical or hydraulic Gesiclitspunt and periodic visits are often unavoidable.

The main purpose of this invention is to alleviate the above disadvantage or to eliminate.

To achieve this end, this invention proposes a pouring water measuring device before, characterized by a primary component rotated by the water outflow, the converts a series of angular displacements into electronic pulse trains a totalization circle of the said pulse trains, through an electronic comparison circle with a programmable and adjustable threshold that emits an anologic signal as soon as the predetermined threshold in the totalization circle is reached and finally by an electric three-way valve actuated by the analog signal or switched from a first position, in which the supply with pouring water the pouring unit allows a second position in which the supply is interrupted and the pouring unit is connected to the outside air.

In the drawing is a Ausfürungsbeipiel of the invention schematic shown. 1 shows a schematic view according to a hydraulic one and mechanical point of view of a inventive water quantity measuring device.

FIG. 2 shows an electronic block diagram of the device according to FIG of Fig. 1.

The water quantity measuring device according to the invention is based on the term to turn the pouring coffee water into electronic impulses, the latter being the last can be converted into an analog signal.

For this purpose, this invention provides a primary component, the consists of a WOLTMAN vortex (MU) and in relation to the drainage water outflow is rotated.

Namely, the infusion water outflow flows through the pipe (CA) and consequently causes the rotational movement of the vertebral disc (DI) which is a lot of equidistant Has holes (FO). As is known, the paddle wheel of the WOLTMAN vortex is solid attached to the spherical disk (DI). Adjacent to the disc (DI) is an optical electronic sensitive device (SE) mounted dit by the continuous rotations of the WOLTMAN paddle wheel is excited.

(TR) denotes the impulses from the optical-electronic sensitive adjustment can be generated.

With reference to the two Figures 1 and 2, (EL) shows an electrical Three-way valve that assume a first (see Fig. 1) and a second (see Fig. 2) position can. After the first position, the valve allows the pouring unit to be fed (CP) and after the second position the last one is with the outside air through the drainpipe (DE) to order the coffee consumed in the disbursement unit by the known Low pressure. To dry out. This mode of operation of the valve is already known.

Referring only to Fig. 2, block by block (TO) shows an electronic Totalization circle of the spout water outflow, the last being the pulse rate (TR) is proportionate.

On the one hand, the totalizing circuit (TO) is connected in series electronic comparison circuit (CT) with adjustable and programmable threshold switched on and on the other hand a recovery circle (English: Feedback) (FB) which serves to bring the totalization circle back to 0 "as soon as the predetermined threshold is reached, mode of operation: Above all, the barman Predefined threshold programmed or set in the comparison circle (CT) so that the place of use is determined in which the valve (EL) will not be switched target.

Those coming from the optical electronic device (MU-DI-Fo-SE) Pulse trains (TR) enter the totalization circle (TO) in which the last one totalizes so that an analog signal (SA) is generated in the comparison circuit (CT).

As soon as the analog signal corresponds to that of the predetermined threshold The three-way valve is reached from the position shown in FIG. 1 changed over to the position shown in Figure 2; that is why on the one hand, the delivery of the pouring water to the pouring unit (CP) is interrupted and on the other hand the used coffee is dried out because of the low pressure effect.

The restoration circle (feedback) (FB) brings the electronic Totalization circle back to the "O" position and therefore the bartender can mine further Operating cycle with the same or a different one set in the comparison circle (CT) Threshold undertake.

With the same result it is possible instead of the optical or WOLTEL ~ N device (SE) a NShekontakte device such as a sensitive primary component use.

L e r s e i t e

Claims (4)

P A T E N T A N S P R Ü C H E) AusguswassermessvorrichtLng in particular fttr coffee machines characterized by a primary component rotated by the water outflow which converts a series of angular displacements in electronic pulse trains a totalization circle of the said pulse trains, by an electronic one Comparison circle with programmable and adjustable threshold, the en analogical Signal outputs as soon as the predetermined threshold in the totalization circle is reached and finally by an electrical three-way valve that is controlled by the analog Signal actuated or switched from a first position in which the supply with pouring water the pouring unit allows a second position wherein the supply is interrupted and the pouring unit is connected to the outside air is set. 2. Spout water measuring device, especially for coffee machines according to claim 1, characterized in that the primary component consists of an electronic optical device consisting of a Woltman vortex. 3. The pouring water measuring device, especially after coffee machines according to claim 1, characterized in that the primary component such as a proximity contact device is trained. 4. Ausguswassermessmessvorrichtung according to especially for coffee machines the previous issues characterized by a feedback circle the totalization circle in the "O" position after the coffee machine has started running automatically re-introduces.