Improvements in Cooling Apparatus for Liquids.
Year: 1896

page_text: Date of Application, 27th Mar., 1896-Accepted, 2nd May, 1896
COMPLETE SPECIFICATION.
Improvements in Cooling Apparatus for Liquids.
I, HERMANN KRACK, of Teplitz, in the Empire of Austria, Director, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:―
For obtaining as perfect a cooling effect as practicable in cooling apparatus it is
absolutely necessary that the liquid to be cooled should flow down slowly over the
cooling surface, and. in order to achieve this object for thin as well as for thick
liquids to an equally great extent, I place according to this invention, the cooling.
apparatus in a more or less inclined position according to requirements and arrange
the cooling tubes in such a manner that the liquid. to be cooled will be compelled,
to continually undergo changes between them.
The cooling tubes arranged upon an inclined support are preferably made flat in
transverse section and are tightly fixed at such. an angle and at such a distance from
each other upon the said support that their upper and lower sides will always
remain in contact with the liquid. Moreover I provide below each cooling tube,
preferably made tight upon. the support by means of a sheet metal strip, one or
more small passages alternately at the right-hand and left-hand ends, opposite to
these passages being corresponding openings in the sheet metal strips, or 1 arrange
the tubes at a short distance from the support in order that during the cooling a
circulation of the liquid not. running over the cooling tubes may take place
between them, and that after the cooling is terminated the liquid may drain off.
completely from the apparatus.
The cooling tubes may also be soldered directly to the support without the use of
the sheet metal strips and furnished with small openings alternately below their
right hand and left hand sides for the purpose alluded to.
In the accompanying drawing I have shown by way of example how the invention
may be conveniently carried into practice.
Figure 1 is a respective view of the apparatus.
Figure 2 is a partial longitudinal section of Figure 1.
Figure 3 is a similar section drawn to an enlarged scale and Figure 4 is a
partial plan.
a designates the box made for example of thick zinked sheet copper and serving as a
support, and b are the flat cooling tubes arranged at the bottom of the box at such
an angle and at such a distance from. each other that their upper and lower sides
will always remain in contact with the liquid to be cooled for the purpose of
completely utilizing the cooling surface, and so that the liquid will drop in the form
of a thin stratum over the free front edge of the tubes according to the inclination
of the support. According to the drawing the admission of the cooling liquid into
the flat tubes 6 takes. place below at band. the. discharge above at 6, but the
arrangement may if desired be reversed.
If it is desired to cool alternately thin and thick liquids the apparatus may
appropriately be provided with a suitable device for enabling it to be placed at the
necessary inclination. In the constructional form chosen the apparatus is pivoted
in front in proximity to the collecting channel a' for instance to suitable standards c
of a frame and furnished at the rear at the distributing channel a² with jointed
bars d having a longitudinal slot, which enable the apparatus to be fixed by means
of bolts and nuts at a greater or smaller inclination relatively to the front standards c
which may likewise be provided with slots.

page_text: If however it is desired to continually cool a certain kind of liquid the proper
inclination may easily be determined beforehand.
In such a case no further adjustment is needed, and the adjusting device may be
dispensed with.
As particularly shown in Figure 3, the tubes are either securely fixed at a short
distance above the support by sheet metal strips which are provided alternately at
the right-hand and left-hand ends with one or more small openings e¹ to afford a
passage for part of the liquid to be cooled and to permit of the circulation towards
the collecting channel a¹; or the tubes b, as also shown in this figure, are soldered
directly to the support leaving the openings el. The said openings el, as already,
mentioned, enable the apparatus to empty itself after the termination of the
cooling,
In the lateral parts of the box a the tubes are tightly held and connected on the
outside by small knee pieces which are adapted to be easily removed for cleaning
purposes. In case the room at disposal should not enable a spray cooling apparatus
of suitable size to be put up the cooling action of the tubes b may be aided by a
double bottom with a separate circulation of water.
As herein before set forth the flow of the liquids in the described cooling apparatus
may be regulated in any desired manner by placing the apparatus at a suitable
inclination. With thin liquids, for instance beer-wort or the like, the apparatus is
adjusted to such an inclination that with a leugth of 2 to 2 metres the slope
amounts only to metre, so that the liquid must flow off very slowly, the entire
cooling surface being completely utilized, whilst with thicker liquids the slope is
increased to an appropriate extent.
By reason of the perfect utilisation of the cooling surface which takes place in
the described apparatus the latter may be made much smaller and therefore at a
lower cost to obtain equal effectiveness as compared with the well-known vertical
coolers, a further advantage being that the spurting of the liquid to be cooled over
the sides of the collecting channel, such as happens with vertical cooling apparatus,
is completely obviated.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A cooling apparatus with flat tubes & protruding one below the other in the form
of terraces, which are rigidly connected with an inclined support at such an angle
to the latter and at such a distance from each other that the liquid to be cooled will
be compelled to collect with continual change between the tubes so that it surrounds
the entire under surface of a higher tube and the entire upper surface of a lower
tube, and drops in part over the free front edge 60 of the tube, and flows off in part
through openings e provided alternately on the left hand and right-hand sides
below the tubes in a zig-zag line towards the collecting channel, whilst after
the termination of the cooling the apparatus will be automatically emptied through
the said openings.
Date : 1
1 1000
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.