DE2554694A1 - DEVICE TO ACCOMMODATE STORAGE DRINKS AT A CERTAIN TEMPERATURE - Google Patents

Description

The invention relates to a device for receiving storage vessels at a certain temperature, with a heated one Container.

The invention relates to coffee machines that have a heated chamber in which one or more coffee kettles or containers are arranged. The coffee kettles contain e.g. coffee liquid from a coffee infuser and are heated to to keep the coffee ready for dispensing at a predetermined temperature.

The invention is based on the object of improving such devices or coffee machines.

The device according to the invention is characterized by a steam generator connected to the container via a steam line is connected, which enters the bottom of the container and opens into the container.

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In the solution according to the invention, a steam pipe is between the top of a water heater or kettle and the bottom of a container that are heated target. In use, steam condenses in the container and the condensate collects, resulting in a water bath, which surrounds the boiler or boilers in the container, the steam then being used to heat the water. The usage a heated water bath that surrounds the boiler (s) provides economical and very good heating Heat transfer from the heated water to the boiler, using the boiler "bain marie" principle.

The steam supply for the container or boiler is preferred controlled by a thermostat located close to the bottom of the heated container and one by one Solenoid operated steam valve controls the passage through the steam line. That way, a precise regulation of the temperature of the water in the container can be achieved.

The liquid level of the condensed water in the The container is determined by the height of the inlet in a drain pipe which stands up in the container.

To prevent noise caused by steam coming into contact with cold water, and around Conveniently, to make the use of a steam trap unnecessary, the end of the steam line extends within the container upwards into a cover in the form of a tube,

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that extends over the upward part of the steam pipe
extends downward with the outlet of the steam line near the closed upper end of the covering tube
lies. The upper end of the tube and thus the outlet of the
Steam lines are above the level of the inlet for the drain / but the open lower end of the covering pipe is below this level.

In use, steam condenses in the steam line in the Near the outlet, and the condensed steam runs on the covering Pipe down outside the steam line and enters the water in the container below its surface.

To have a good heat transfer between the steam pipe
and the water, the steam line preferably runs in a tortuous path across the bottom of the container.

The invention is explained in more detail below with reference to an exemplary embodiment shown in the drawing. the
The drawing shows in perspective an embodiment of a coffee machine with the features of the invention.

The device shown has essentially a
Steam generator 2 in the form of a water boiler, one not
coffee infuser shown and a heated container 4, which forms a chamber which receives two coffee containers, not shown. Coffee is prepared by forcing water under pressure from the steam generator through coffee in the infuser and directing the coffee liquid to one or the other of the coffee vessels in the container 4. The coffee is in these

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Vessels kept until it is removed by a user. The coffee in the vessels must always be on one be kept hot at a predetermined temperature.

The container 4 is heated in that steam is introduced from the top of the steam generator via a steam line 6 which enters the bottom of the container and follows a winding path across the bottom of the container, so that a good heat transfer to the water 'achieved in the container will. The steam line 6 then ends in an upstanding end section 8 within a covering tube 10, wherein the outlet of the steam line is near the closed upper end of the covering tube, while the lower End of the tube is open.

If the container 4 is empty and cold, steam enters via the steam line 6 from the steam generator 2, and while it flowing through the steam line 6 inside the container 4, it condenses, and the condensate flows inside the covering Tube 10 down and collects at the bottom of the container. The condensate is then both by the discharge new condensed steam and by heat exchange with the steam line 6 via the tortuous path at the bottom of the container heated, and this in turn heats the container.

A thermostat, not shown, is located on the floor of the container. When the condensate reaches the desired temperature, the thermostat closes an electromagnetically operated one Valve 12 so that the further flow of steam through the

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Steam line is prevented. If the temperature falls below a predetermined value, the thermostat opens the valve again 12, so that new steam can flow into the steam line 6 and heat the container.

If the liquid level of condensed water has risen to the level of the dot-dash line marked L, so the water flows over into a drain 14 of a drain pipe 16 and from there.

The coffee vessels, which are expediently glass vessels, stand in the water bath created in this way and are heated extremely effectively, due to the heat transfer from the Water to the coffee liquid in the vessels and better and more effective than heating with a steam bath alone.

New steam entering the container condenses as it flows through the steam line and drips on the inside of the covering tube 10 down and enters the water bath below the water level.

If the device is started up again after the water in the water bath has cooled down, hot steam is generated prevented from coming into contact with cold water, thus avoiding unwanted noises that would occur, if steam were introduced directly into cold water.

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Claims (7)

Patent claims ; 1.j Device for holding storage vessels at a certain temperature, with a heated container, characterized by a steam generator (2) which is connected to the container (4) via a steam line (6) which enters the bottom of the container and opens into the container. 2. Device according to claim 1, characterized in that in the steam line (6) a valve (12) is provided for controlling the steam flow through the steam line and that the valve (12) is actuated by a thermostat in the heated container (4) . 3. Device according to claim 1 or 2, characterized in that the container (4) is provided with an outlet (14) for regulating the liquid level (L) in the container. 4. Device according to one of claims 1 to 3, characterized in that the steam line (6) extends after entering the container (4) via a winding path over the bottom of the container. 5. Device according to one of claims 1 to 4, characterized in that the steam line (6) within the container (4) ends with an end section (8) which extends within a 60 98 2 5/029 9 Cover in the form of a tube (10) extends upwards, the extends downwardly over the upwardly extending end portion with the outlet of the steam conduit in the vicinity of the closed upper end of the tube forming a cover lies. 6. Device according to claim 5, characterized in that the upper end of the end section (8) of the steam line (6) above the desired liquid level (L) in the container (4) lies, while the lower end of the tube (10) is below the desired height of the pipe. 7. Device according to one of claims 1 to 6, characterized in that the steam generator (2) is a kettle which is connected to the storage vessels via an infuser. 609825/0299 Blank page