DE8023472U1 - COFFEE MACHINE, ESPECIALLY ESPRESSO MACHINE - Google Patents

Description

j BOSCH-SIEMENS HAUSGERÄTE GMBH 8 Munich 80, August 13, 1980 *> Stuttgart Hochstrasse 17

TZP 80/617 Vei / ant

Coffee machine, in particular espresso machine

The invention relates to a coffee machine, in particular an espresso machine with a drainage channel for the prepared coffee, which leads to two outlets and divides the coffee between them.

Espresso machines usually have two close together Spouts, with a cup under both spouts or one cup at a time can be placed under a spout. In the latter case, it often prepares the even division of coffee on both cups trouble. It must also be ensured during the division that the filtering of the coffee generated foam can be discharged unhindered and is destroyed as little as possible.

The invention is now based on the object to provide a coffee machine of the type described above that the The coffee that has been prepared is distributed as evenly as possible over the two outlets and that which is formed during the coffee-making process Foam can also be let out unhindered.

This object is achieved according to the invention in that the drainage channel one narrow point widening away from the canal floor and one, the beam formed by the narrow point, in two

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Has partial streams to the outlets dividing cutting edge. The cutting edge preferably extends from the channel floor in the widening direction of the constriction.

This solution has the advantage that the prepared coffee backs up a little at the narrow point and calms down and due to the widening of the constriction upwards, a water jet is reliably formed even with different coffee flows that the cutting edge can divide into two equal partial flows. It should be noted that depending on the degree of grinding of the Coffee grounds the brewing process z. B. with a filter centrifuge takes between 20 seconds and 2 minutes and, accordingly, the flow rate in the drainage channel, depending on the degree of grinding of the coffee is very different in strength. Added to this are the start-up and run-out phases of the brewing process and thus the coffee flow. Essentially on the coffee surface floating foam is not hindered in any way as it flows through the constriction and can flow out with it. Using With a centrifugal filter, the prepared coffee has a strong drainage component, which affects the distribution the two outlets eliminated by the backwater at the bottleneck will. In this case, the constriction is at a certain minimum distance from the annular one surrounding the centrifuge Arrange channel in order to achieve sufficient calming.

The cutting edge is expediently arranged downstream adjacent to the constriction. The constriction can be in the direction of flow expand roughly V-shaped seen. On the bottom side, the constriction can be a flattening d. H. have a minimum width that is to be adapted to the occurring outflow.

The constriction is advantageously in an approximately horizontally or slightly inclined section of the drainage channel arranged and the cutting edge extends approximately vertically

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from the ground up. The division of the flow in one horizontal section of the ATdI on the channel it has the advantage of the least possible obstruction to foam drainage.

In the following an embodiment of the invention is explained in more detail with reference to schematic drawings.

It shows

Fig. 1 is a vertical section through an espresso machine with centrifugal filter, essentially in a section along the lines I-I in Figures 2 and 3;

FIG. 2 shows a section on a slightly enlarged scale, essentially along it the line II-II in Fig. 1 and

Fig. 3 is a section essentially along the line Line III-III in Fig. 2.

The espresso machine "shown in the figures has a base housing 2 on which an annular collecting channel h is arranged, which has support arms 6 on its underside which carry an electric motor with a drive shaft 10 projecting vertically upwards. The output shaft 10 ends in a clutch disk 12, on a centrifugal filter is plugged ik. a to the plenum k plugged cover 16 has the centrifugal filter 14 surrounding a small distance vertical annular wall 18 which k protrudes into the collecting space down and flows along which the centrifuged coffee downwards. the lid 16 has a central cover-side pouring opening 20 for the brewing water, under which a pouring opening 22 is located in the lid of the centrifugal filter lh.

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The annular collecting space 4 has an inclined bottom 24 from the lowest point of which a tubular drainage channel 26 protrudes approximately radially outward with a slight gradient. At a distance from the annular chamber of the collecting space 4, the side walls 28 and 30 of the Αΐ> 1 on channel it 26 indentations 32 and 3 * i, which begin at the bottom 36 of the AhI on channel it at a small distance from each other, each over the The lower 2/3 of the side wall 28 or 30 extend and thereby step apart in a V-shape in order to form a V-shaped constriction 38 which widens upwards away from the channel bottom 36. Behind the constriction 38, two outlets 40 and 42 adjoin the drainage channel 26, whose side walls 46 and 48, which are remote from the side walls 28 and 30 of the drainage channel, form a vertical cutting edge 44 at their junction, which is arranged downstream a little bit behind the bottleneck 38 and divides the coffee jet emerging from this into the two water runs 40 and 42. In Fig _t 1 is a standing under the outlet 40 cup 50 is illustrated. The cross-sections of the two outlets 40 and 42 are dimensioned so that backflow only occurs at the narrow point 38 and never in the outlets, since backflow in the outlets could hinder the outflow of the foam. The drainage channel with its constriction is designed so that it is never completely filled with coffee. The V-shaped constriction ensures good centering of the jet for small and large flow rates, without preventing the foam, which is essentially floating on the coffee, from flowing out.

Instead of the cutting edge, a transverse wall acting more or less as a baffle can of course be arranged behind the narrow point which also has a good distribution of the coffee jet causes the two outlets. The bulkhead can be in the impact area of the beam can be more or less rounded, the axis of the approximately cylindrical rounding being essentially vertical extends.

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FIG. 4 shows in a section corresponding to that of FIG. 2 and essentially along the line IV-IV in FIG. 5 and FIG. 5 shows in a section corresponding to that of FIG. 3 and essentially along the line VV in FIG. 4 shows a modified embodiment of a constriction 438 in a drainage channel 426 with side walls 428 and 430. The constriction 4-8 is formed by transverse walls 432 and 434, which extend between the bottom wall 436 and the top wall 437 from the side walls 428 and 430 in the The interior of the channel 426 extend into it and, measured on the outlet side, enclose an angle ° ^ - of 220 ° with one another. This "causes the outlet-side surfaces of the transverse walls 432 and 434 to each enclose an angle of 110 ° to the direction of the disturbance, whereby these surfaces are set back to the side relative to the flow and reliably prevents the flow from reaching the transverse walls behind the constriction or the side walls 428 and 430. That is, the jet breaks away from the transverse walls 432 and 434 at the exit of the constriction and hits a vertical cutting edge 444 arranged behind, which divides it into two partial flows The transverse walls 432 and 434 diverge further upward so that the constriction seen in the direction of flow (see FIG. 5) is essentially V-shaped.

Claims (12)

TZP 80/617 _ 6 _ Φβ * «α * Claims 1. Coffee machine, in particular espresso machine with a drainage channel for the prepared coffee, which leads to two outlets and divides the coffee between them, characterized in that the drainage channel (26) has a constriction (38) formed by side walls (28 to 34) and a , the transverse wall (44,46,48) dividing the jet formed by the constriction into two partial flows to the outlets (40, 42). 2. Coffee machine according to claim 1, characterized in that the constriction (38) widens away from the channel bottom (36). 3. Coffee machine according to claim 1 and / or 2, characterized in that that the transverse wall (46, 48) dividing the jet has a cutting edge (44) dividing the jet. 4. Coffee machine according to one of claims 1 to 3, characterized in that the cutting edge (44) is in one plane extends, which lies between the planes of the side walls (28 to 34) and extends approximately parallel to these. 5. Coffee machine according to one of claims 1 to 4, characterized characterized in that the cutting edge (44) extends from the channel bottom (36) in the widening direction of the constriction (38). 6. Coffee machine according to one of claims 1 to 5, characterized in that that the cutting edge (44) is arranged downstream adjacent to the constriction (38). I · TZP 80/617 - 7 - 7. Coffee machine according to one of claims i Dis 6, characterized characterized in that the constriction (38) widens in a V-shape as seen in the direction of flow. 8. Coffee machine according to one of claims 1 "to 7, characterized characterized in that the constriction (38) has a flattening (36) on the bottom. 9. Coffee machine according to one of claims 1 to 8, characterized in that the constriction (38) is arranged in an approximately horizontally or slightly inclined section of the drainage channel (26). 10. Coffee machine according to claim 9, characterized in that the cutting edge (44) extends approximately horizontally or slightly inclined section of the drainage channel (26) extends vertically. 11. Coffee machine according to one of claims 1 to 10, characterized characterized in that the outlet channel (426) is widened laterally without a transition behind the constriction (438). 12. Coffee machine according to claim 11, characterized in that the constriction (438) is formed from laterally a piece in the outlet channel (426) projecting transverse walls (432,434) which, measured on the outlet side, enclose an angle ( oC ) of more than 180 ° with one another.