Refrigeration – Storage of solidified or liquified gas – With vapor discharged from storage receptacle
Patent
1991-11-27
1993-08-03
Capossela, Ronald C.
Refrigeration
Storage of solidified or liquified gas
With vapor discharged from storage receptacle
62 70, 62 71, 2221291, 261151, 261DIG7, F17C 310
Patent
active
052318516
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a method for carbonating and cooling a liquid, particularly a beverage, wherein carbon dioxide under high pressure is introduced under the liquid surface and is allowed to expand and dissolve in the liquid. The invention also concerns a device for carrying out this method, said device including a closed vessel, a liquid inlet opening into the vessel, a carbon dioxide inlet opening into the vessel under the surface of the liquid, a discharge conduit for carbonated liquid, and, leading from the vessel above the liquid surface a re-circulation conduit for carbon dioxide not dissolved in the liquid.
Many different methods and devices for carbonating liquids are known, for instance through DE-25 59 651 and 29 40 407, wherein carbon dioxide under relatively low pressure and through porous diffusers are introduced under the surface of the liquid in order to raise against the liquid surface in the shape of very fine bubbles and under dissolution in the liquid. According to DE-29 40 407 the liquid is further sprayed in an atomized shape into the volume of carbon dioxide undissolved in the liquid which is located above the liquid surface in order thereby to further increase the amount of carbon dioxide dissolved in the liquid. A pump withdraws carbon dioxide from the volume of undissolved carbon dioxide mentioned and re-introduces it under the surface of the liquid. Cooling of the liquid is achieved by cooling circuits arranged in the liquid or outside its vessel.
The known devices for carrying out these methods, thus, require a carbon dioxide circuit as well as a cooling circuit and, therefore, are expensive as well as cumbersome.
U.S. Pat. No. 4,022,119 described a method and a device for simultaneous carbonating and cooling of a liquid using expanding carbon dioxide. The carbon dioxide is kept stored in a tank from which it is introduced at the bottom of an upwardly open carbonating vessel, into which is also successively introduced the liquid to be carbonated. The carbonated liquid flows over the edge of the upwardly open carbonating vessel and down into a surrounding vessel from the bottom of which the carbonated liquid is conducted further to be drawn into containers for consumption. In this known method, which i adapted for industrial, large scale operation, the cooling with expanding carbon dioxide has as its only object to make possible dissolution of larger amounts of carbon dioxide than otherwise would be possible.
The object of the present invention is to provide a new method and a new device for carbonating and cooling of liquids, said device working with only one circuit, which makes the device more simple and cheap. Particularly, the device shall be suitable for preparing cooled carbonated beverages in households, in offices and the like where a fast and effectively working device requiring little space is demanded.
In order to achieve these objects the invention has been given the characteristics appearing in the following claims.
BRIEF DESCRIPTION OF THE DRAWING
The FIGURE schematically shows a device for carbonating and cooling a liquid according to the invention.
In a vertical wall of a closed container 1 opens a feeding conduit 2 for liquid, such as water, and in the bottom of the container open a high pressure conduit 3 for introducing carbon dioxide in the liquid and a refill conduit 4 for carbon dioxide. Also extending from the bottom of the container is a discharge conduit 5 for carbonated liquid. From the upper wall of the container extends a re-circulation conduit 6 for carbon dioxide.
The re-circulation conduit 6 is connected to a compressor 7 the output side of which is connected to the high pressure conduit 3 through a cooler 8.
When filling liquid through conduit 2 a volume 9 of liquid is obtained in the container 1, and, by injection of carbon dioxide through the filling conduit 4 a volume 10 of carbon dioxide undissolved in the liquid is obtained located above the liquid surface.
In a known manner the undissolved carbon dioxide located in the volume 1
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