DE7422340U - COFFEE MACHINE - Google Patents

Description

• *

Patent attorney ÖIPL .'- ING.BERTHOLD SCHMID STUTTGART 1 FALBBNHENNBNSTRASSB 17 FBRNSPRBCHBR (0711) 608893 UNlIl ZIICBM

12 43 «B / sw

company

Electros tar Shake KG

7313 Reichenbach / F.

coffee machine

The invention relates to a coffee machine with a calcification display. Coffee machines are already known in which the calcification of the heated water tank or the water supply is indicated by the extinguishing of the control lamp of the device. Such a signal however, it is ambiguous and may give rise to errors. If the device is used for other reasons, for example damage to the heating coil or power failure no longer works, the control light also goes out and you have to check each time more closely which one There is a cause.

7412848 31st U77

The present invention is based on the object to create a calcification indicator that is clearer Allocation only indicates the calcification of the device and cannot have any other causes. According to the invention this is achieved by an additional display device for calcification.

The display device preferably has a heating device of the machine assigned to it, at the upper working temperature responsive thermocouple, which is connected to an optical display. After a Another feature of the invention can be the visual display be directly mechanically connected to the thermocouple. It can be a sign here, for example act, which is swiveled into a window cutout in the machine housing when calcification occurs. Preferably, however, the optical display is electrically connected to the thermocouple and in particular exists from a lamp or an electromagnet with a mechanical display.

7422340 31.C3. 11th

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In many cases, the coffee machines are equipped with thermal limit switches equipped, which after the water has passed through the corresponding temperature increase switch off the device. The limit switch is useful in such a machine at the same time designed as a thermocouple for calcification, the limit switch as a changeover switch with the optical display and these electrically one behind the other are connected to a switch controlled by a float arranged in the water reservoir and the off position of the switch is assigned to the empty container. If a thermal device limit switch and a Thermocouples for calcification are provided next to each other, the thermocouple for calcification has a lower one Ans ρ right temper a door as the limit switch.

A thermocouple is expediently used for calcification, which responds with a time delay. When finished Water flow inevitably increases the temperature of the heating device. This is exploited to switch off the device with the thermal limit switch. However, it is now to be prevented that a calcification display occurs due to this increased end temperature,

7422340 03/31/77

and this is achieved by the time lag since then the device is already switched off when the thermocouple for the calcification responds. To the time delay you can either place the thermocouple at a greater distance from the heater or between Provide a heat-retardant material for the element and the heating device * The visual display is useful connected to the power source via the device limit switch, so that no display is displayed after the device has been switched off more is done.

When using a machine with a control lamp, according to a further feature of the invention, the mechanical optical The display can be designed as a particularly transparent display panel that covers the control lamp in the event of calcification "

The drawing shows schematically several exemplary embodiments of the invention.

They represent:

Figure 1 shows the arrangement and circuit of a coffee machine with thermal limit switch and float;

Figure 2 with thermal limit switch and thermocouple for calcification and electrical display;

Figure 3 with thermal limit switch and thermocouple for mechanical display,

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4 111 IKi * II

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FIG. 4 shows a representation according to FIG. 3 with a different arrangement of the mechanical display.

In Figure 1, the temperature of the heating device 1 sensed by a thermal device limit switch 2, which is also designed as a switch for the device. The switch 3 is designed as a changeover switch and connects the heating device 1 in the switched-on position and the control lamp 4 with the power source 5. As soon as the temperature of the heating device 1 rises above the set level, the thermocouple 2 responds and the switch 3 switches over so that the control lamp 4 goes out and the signal lamp 6 with the voltage source 5 in series with the switch connected is. Switch 7 is mechanically connected to a float 8 in the water reservoir 9 is arranged. The switch 7 is set so that it only switches off when the water reservoir 9 is empty.

As soon as the device has reached a certain degree of calcification, the thermocouple 2 responds because of the greater heating of the heating device 1 while the water is flowing through and not at the end of the same. As long as there is still water in the water tank 9, the signal lamp 6, which indicates the calcification, is connected to the power source 5 via the switches 3 and 7 and lights up. The overheating occurs normally

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but only after the water has passed through, then switch 7 is already open and switch 3 only acts as a simple limit switch for the device.

In the exemplary embodiment according to FIG. 2, the heating device 1 and the fashion holder 2 are in the same way arranged as in FIG. 1. By the thermal limit switch a simple off switch 10 is actuated, which connects the entire device to the power source 5. at switched on device are then the heating device 1, the control light 4 and the signal light 6 with the Power source 5 connected. In the circuit of the control lamp 6, however, there is an electrical one behind the other Switch 11 is provided, which is operated by a second thermocouple 12 for calcification. The thermocouple 12 responds at a lower temperature than the thermocouple 2, but at a temperature that is of course also above the normal working temperature. As soon as the device is now in a If calcified to the corresponding extent, the working temperature of the heating device 1, the thermocouple 12, increases responds and closes the switch 11, which then brings the signal light 6 to the display. Since the thermal

7422340 31.0177

element 12 inevitably also denies calcification, when the water flow is finished and thereby the temperature of the heater 1 rises, it is equipped with a time delay, so that, as a result, the responding per se only at a higher temperature Thermocouple 2 switches off the entire device beforehand and can no longer display the signal light 6.

In the embodiment according to FIG. 3, the heating device 1, the thermal limit switch 2 and the off switch 10 as well as the Control lamp 4 arranged in the same way as in FIG. The additional thermocouple 12, which is also the one corresponds to FIG. 2, but is purely mechanically connected to a display panel 13 instead of the signal lamp 6. The mode of operation is similar, only with the difference that the action of the thermocouple 12 is through Switching off the entire device has not been completed. However, this is irrelevant as it is a calcification indicator is only of interest while the device is in operation. In addition, the calcification indicator has a locking device 14 provided by which the display panel 13 is held in the calcification position for so long, until the locking device is released again by hand.

In the exemplary embodiment according to FIG. 4, there is only the control lamp 4 so provided below the display panel 13 that

7422340 03/31/77

I the indicator light in the case of calcification by the display ;

blackboard is covered. This consists of transparent material ]

and can be labeled "Kalk". If the display does not appear until after the water has flowed through, the control lamp has already gone out and the display panel is therefore no longer observed.

7422340 03/31/77

Claims (10)

Expectations 1. Coffee machine with calcification indicator, marked by an additional display device for calcification. 2 * Machine according to claim 1, characterized in that the display device is one of the heating device (1) the machine has associated thermocouple (2, 12) responding at upper working temperature, which is connected to an optical display (6, 13). 3. Machine ave one of claims 1 or 2, characterized characterized in that the optical display (13) is mechanically connected directly to the thermocouple (12) is. 4. Machine according to one of claims 1 or 2, characterized in that the optical display is electrical is connected to the thermocouple (2, 12) and in particular from a lamp (6) or an electromagnet with mechanical display. - 10 - 7422340 31.0177 - lü - 5. Machine according to one or more of claims 1, 2 or 4 with thermal device limit switch, characterized in that that the limit switch (2) is also designed as a thermocouple for calcification, the limit switch as a changeover switch (3) with the optical display (6) and these electrically one behind the other with a switch (7) controlled by a float (8) arranged in the water storage tank (9) are connected and the empty container (9) is assigned the off position of the switch (7). 6. Machine according to one or more of claims 1 to 4, with thermal device limit switch, characterized in that that the thermocouple (12) for calcification has a lower response tempera door than the limit switch (2). 7. Machine according to one or more of the preceding claims, characterized by a time delay responsive thermocouple (12) for calcification. 8. Machine according to claim 7, characterized in that for the time delay the thermocouple (12) in one - 11 - 7422340 03/31/77 I I I I 4 I. > I. - 11 - At a distance from the heating device (1) or opposite this «
is covered. Opposite this by a thermal exemption from the »Vicrkstcff 9. Machine according to one or more of claims 1 to 4 or 4 to 8, characterized in that the The optical display (6) is connected to the power source CS) via the device limit switch (10). 10. Machine with a control lamp according to claim 3, characterized in that the mechanical optical Display (13) as a control oil lamp (4) in the event of calcification covering, in particular transparent, display panel (13) is formed. 7422340 3i.oa77