DE1989557U - COFFEE MACHINE. - Google Patents

Description

coffee machine

The innovation relates to a coffee machine with an electric one heated water storage tank, from which hot water via a riser pipe and steam via a closable steam pipe is passed into an intermediate chamber ^ from which hot water in a filter is running.

In the case of coffee machines, care must be taken that from the When the heating is switched on, the water boiler does not exceed a relatively low temperature due to the expanding gas volume the riser pipe is fed into the coffee filter Coffee machines at least the amount of hot water supplied to the filter Be controllable within certain limits so that the water flow is even and overflow of the filter is also reliably avoided is like insufficient water intake. \

- Hae / wk

May 15, 1968

: PVA 63/5261

To avoid a cold water flow, it has already been suggested * to equip the hot water tank with a control valve ^, which only closes when there is a corresponding flow of steam and thus a pressure for pumping the water can only build up at a corresponding temperature.

It is known to control the amount of water pumped to use temperature-controlled switches which switch the heating on and off depending on the temperature However, temperature control is very difficult to implement ^ especially since the air pressure at the operating site must also be taken into account for precise control «

The innovation is based on the task ^ in a coffee machine with a pressureless filter an overflow of the hot water as a result Avoid excessive amounts.

According to the innovation, it is proposed to solve the task at hand * the opening of the steam pipe opening into the intermediate chamber of one To control float valve automatically in such a way that with increasing Water level in the intermediate chamber the valve is opened »

It is particularly advantageous if the float valve ₉ comprises a tube surrounding the steam with play float body

closes off the steam pipe opening with an extension “With rising Water feature, the mouth of the steam pipe is opened and thus the water supply to the intermediate chamber and thus to the filter discontinued or prevented.

"2 -

PVA 62/5261

Exemplary embodiments of the innovation are explained on the basis of the drawing «

FIG. 1 shows a kettle 1 with a built-in electric heater 2 for the hot water and a further heater 3 as a warming heater for an attached coffee pot K. A riser pipe 5 and a steam pipe 6 are connected to the kettle 1, both in one above The tank 8 arranged in the filter 7 open out "The necessary electrical switching devices are" omitted "in the drawing as well as the necessary filler openings and the like. The tank 8 is equipped with an outlet opening 9 and a steam discharge nozzle 10 12 of a float body IJ closed "The float body 13 is designed in a ring so that it encloses the steam pipe 6"

Fig. 2 shows an embodiment in which on a base plate 15 with the heaters 16 and 17, the kettle 18 and the Coffee pot 19 are attached «Otherwise, the same parts have the same reference numerals.

The operation of a coffee machine according to FIGS. 1 and 2 is as follows; When the electrical heaters or 16 are switched on, the air volume in the upper part of the kettles 1 or 16 expands as the temperature rises small opening «The air can escape via the steam nozzle 10» When the water has reached the temperature required to generate steam, _see

PVA 63/5261

so a higher pressure occurs in the kettle, which cannot be reduced through the small opening at the mouth 11, but instead pumps water through the riser 5 into the tank 8 Extension 12 is lifted from the mouth 11 and thus a larger outlet cross-section is released for the generated steam. Through the opening 9s de * ¹ you can give a certain flow cross-section, the hot water flows evenly into the filter 7s and in such an amount that an overflow of the filter 7 is practically prevented. "

Of course, depending on the position of the float 13, the heating can be controlled additionally or, if necessary, independently of the opening control for the mouth 11 · This can be done, for example, mechanically via a correspondingly actuated switch. Also by connecting the float to an electromagnet ^ der in turn works on a magnetic _{switch s} the heating can be controlled depending on the float position

3 claims for protection 2 figures

Claims (1)

Λ 1 / Q 9 i ■ / * 1 η h H, £ / J £ j / * j y. J. PVA 63/5261 Protection claims 1 »coffee machine with an electrically heated water storage tank., from there hot water via a riser pipe and steam via a closable steam pipe into an intermediate chamber ^ from which hot water runs into a filter characterized ^ that the in the intermediate chamber opening of the steam pipe is automatically controlled by a float valve in such a way that with increasing Water level in the intermediate chamber the valve is opened « 2 _{e s} coffeemaker according to claim l characterized in that the float valve comprises a tube surrounding the steam with play float _s which ends with an extension, the steam pipe opening " 3 · Coffee machine according to claim 1 and 2 _S, characterized * that the steam pipe opening and / or the mouth closure are designed so that there is always a defined minimum opening.