DE2913385A1 - BOILER FOR ESPRESSO COFFEE MACHINES - Google Patents

Description

2913385 PATENT Attorney DIPLING. PAUL DIEHL UETZENBURGER STRASSE 53-1OOO BERLIN 15CALL <030) 8822063/8822064

March 29, 1979 D / ED

Piero Nascardi Via Verona, 27100 Pavia Italy

Kettle for espresso coffee machines

2 7/0536

.B

Boiler for esprsso coffee machines.

The subject of the present invention is a kettle for espresso coffee machines for domestic use and for bars or «restaurants, which is provided with a special separate circuit for the generation of steam.

As is known, small coffee machines for the preparation of espresso coffee for domestic use are currently produced, which essentially have a chamber for holding water in which an electrical heating resistor is arranged _{or the like}

This chamber is taken the water by a pump and pressurized with a suitable temperature and in of the desired amount on the coffee powder arranged in the corresponding filter.

The coffee machines designed in this way have the disadvantage that they can only generate a limited amount of heated steam, which is usually used for boiling liquids, such as milk, schnapps and the like, which are contained in jugs or glasses, is used.

The steam produced by these * machines is not only insufficient in quantity, but it is also hot Water mixes and therefore causes undesirable dilution of these liquids.

There are also coffee machines known that are equipped with elec-

tric resistors are provided, which are made in castings Aluminum or other metals are embedded (thermoblocks), with the water inside these castings in a cavity or when flowing through a tubular element is heated.

With these machines, the heated water is used for both used in the preparation of coffee as well as for the generation of steam.

If steam is to be generated, the entire block must inevitably be heated in these coffee machines.

If one wants to use such a machine after the superheater of the block, which is necessary for the renewal of steam Was to also make coffee, then there, the only pipe available is a mixture of heated steam and Water at too high a temperature.

However, this mixture is for the preparation of a good coffee infusion (for the use of water with a Temperature of around 85 ° is optimal) is not suitable because the coffee brewed has a "burnt" taste may have.

The object of the present invention is to create an espresso coffee machine for household use or for Bars or eateries that generate enough superheated steam to warm beverages enables and at the same time allows the

Ö3Q027 / 0S36

the necessary water for the preparation of a coffee infusion heat right temperature.

This object is achieved by the features of claim 1.

It is of particular importance that according to the invention Training the espresso coffee machine the water at the top of the chamber, so in the area in from which it has the highest temperature.

There is a little copper around the outside wall of the chamber Wrapped pipe into which the water to be evaporated is fed, if steam is used to heat drinks, Schnapps and the like is to be produced.

This copper pipe is wound in such a way that it forms a coil and it is in contact with a resistor, which is embedded in a microduct, which is also helically wound between the same Snake tube is arranged.

The mentioned resistor consequently serves as a heating element both for the water contained in the aforementioned chamber as well as for the snake pipe.

In this way it is possible to obtain rapid and effective heating of the pipe necessary for the generation of steam is used without excessively increasing the temperature of the water contained in the chamber.

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In this respect it is useful to underline «, that the water intended for evaporation comes from the lid of the chamber via a tap in the already heated state is removed.

If the operator has a large amount of water to evaporate brings, in particular the water level in the chamber must be restored afterwards by supplying cold water getting produced.

The water in the chamber can therefore always be used without the risk of overheating or burning the coffee the correct temperature.

The invention is used to better understand the functional and structural nature of the kettle for espresso coffee machines for domestic use and for bars or Restaurants, explained in more detail using the embodiment shown in the drawing. She shows:

the side view of the boiler in partial sectional view showing the output group and the line for removal of steam in the espresso coffee machines for domestic use according to the invention, can be recognized.

Then there is the boiler according to the invention for Esprasso coffee machines for home use and for bars or restaurants from a chamber 1, which is made of copper, brass or another suitable material that has a high thermal conductivity.

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On the outer wall of this chamber 1 are helical and a small copper pipe 2 and a suitably protected electrical resistor fitting into each other wrapped.

Inside the same chamber is contained water which is drawn from a reservoir (not shown) through the inlet 7 is fed via a pump not shown, which is responsible for restoring the water level after each Water withdrawal in the form of infusion liquid or warming steam cares.

The infusion water is extracted in particular through a vertical pipe 4 which is open at the top and therefore capable of to supply the water to the output group 8 at a higher temperature.

In the upper area of the chamber mentioned, an end 6 of the copper tube 2 penetrates through the cover 5, through which the Water to be evaporated emerges from the bottom upwards from the chamber 1 and comes into contact with the resistor 3 of the steam dispensing device got.

In the chamber 1 there is water, which is monitored for a correct, by an appropriate thermostat Temperature is heated while in the tube 2, which surrounds the chamber 1 and with the heating resistor 3 in contact stands, the previously heated water due to the direct heat supply caused by the resistance itself is evaporated.

08QO27 / O538

This measure therefore ensures that the im
Water present inside the chamber 1 is not subject to any increase in temperature, since the average temperature in the chamber 1 is not used for the generation of the steam
changes. ■ -

From the above, the greater expediency and the simplicity of use of the construction according to the invention clearly emerge, which the boiler for
Identifies espresso coffee machines for domestic use and for bars or restaurants, which forms the subject of the present invention.

'Patent attorney

Ö80027 / 0536

/O

List of drawing positions:

1 chamber

2 copper pipe

3 resistance

4 vertical tube

5 lids

6 end of

7 inlet

8 outgoing group

OÄQQ27 / Q536

Claims (5)

Expectations 1./Kettle for espresso coffee machines for Haüsge \ J use or for bars or restaurants, characterized by a separate circuit for the generation of steam, this kettle consisting of a chamber (1) made of a material that conducts heat well through a resistor (3) or a microtube, which is helically wound on the outer wall of the chamber (1), is heated, with a small copper tube (2) arranged between the windings, which is located in the area of the upper part of the chamber (1) is immersed in the same and conveys the previously heated water to the steam output, while the evaporation of the water takes place inside the copper pipe (2) by additional heat input from the micro-pipe resistor to the copper pipe (2). 2. Boiler according to claim 1, characterized in that that it consists of a chamber (1) made of copper, brass or another suitable material that has a high thermal conductivity, with a small copper pipe on the outer wall of this chamber (1) (2) and an electrical microductJ resistor (3) are helical and wound at alternate points and this microduct resistor (3), the is protected in a suitable manner, is arranged in contact with a tube or hollow body (3) 3. Boiler according to one of claims 1 and 2, characterized in that g e - - 2 - indicates that inside the chamber (1) Water is included, which is supplied from a storage tank via a pump, which is used for recovery the water level after each withdrawal in the form of infusion liquid or warming steam. 4. Boiler according to one of claims 1 to 3, characterized g ekenn ze ichne t that it is with a vertical Pipe is provided, which is open at the top and is able to take the water with higher temperature from the mentioned Promote Chamber to Issue Group. 5. Boiler according to the preceding claims, characterized in that in the upper region of the Chamber (1) immersed one end of the small copper pipe (2) through which the water to be evaporated passes for steam output preferably from bottom to top and to be promoted in contact with the heating resistor. 830027/0536