US2606750A - Liquid cooling apparatus - Google Patents

Description

Aug. 12, J. JAClR LIQUID COOLING APPARATUS Filed June 22, 1949 INVENTOR J01? h Jazz/- ATTORNEY Patented Aug. 12, 1952 :LIQUID oooLINGAPPARA'rUs J osephJ acir, Neuilly-Plaisance, France Application June 22, 1949, Serial No. 100,650 E 1 v A number of types of liquid'coolers are known; which operateby "a combinationof convection and evaporation, with heat exchange having a fluid circulated in countercurrent by natural or forced draught. 1 f The various existing ap aratus have, certain disadvantages namely largeloverall dimensions, liability to become! obstructed, or again too high a pumping or blowing poweror untimely'entrainment of water. 1",,

The object of the presentfinven'tion is to provide a typeof apparatus in which the disadvantages hitherto encountered are avoided In this apparatus, the'liquid arriving at the top is divided by meetns-ofdi'stributors into droplets or fine streams, and these droplets or fine streams of liquid are collected by means of a receiving system after having fallen a predetermined height.

An important feature of the invention resides in the provision of an arrangement for rendering uniform the flow of Water, this arrangement consisting essentially in providing at the bottom of the distributor a series of teeth or vertical or inclined points, the extremities of which are downwardly directed, and which are intended to divide the fluid sheet into thin streams flowing continuously or drop by drop on to the receiving arrangement.

In the present form of embodiment of the invention, the distributor comprises parallel series of steps staggered in height and in widthin the manner of a flight of stairs, which permit the water to spread transversely, each of the lower steps being provided with the aforesaid arrangement.

The receiving arrangement is composed of separate parallel elements having suitably curved water-collecting surfaces which direct the water towards collecting troughs, the said elements being so disposed that the air can circulate vertically between the troughs and the collecting surfaces to cool the thin streams of water overflowing from the distributing arrangement.

The invention is also characterised by other forms of distributors, in which the distribution of the liquid is effected by flow from an overflow of any form on to a corrugated plate, the pitch of which corresponds to the spacing of the points or elements to be fed, the depth of each corrugation being calculated as a function of the delivery required at each of the points fed. It is possible to obtain at each of these channels a thin stream of liquid of the desired form, i. e. a circular jet or film.

The invention will now be described with ref- 2 a I: '1 erence to the accompanying drawings, which show; by way of examplewarious constructional forms of cooling apparatus accordingto the invention, and in whichz j Figure 1 shows in perspective a distributing arrangement,- H p v 1 I -Fi gure 2 isavariant of the arrangement shown nFig- Figure 3 isa sectional view-of a receivingarrangement,

Figure 4 is a sectional view of a variant of the receiving arrangement, r

Figures 5' and dare elevational side and face views of a whole distributing arrangement. As has already been stated, the cooling appa ratus (Fig. 1) comprises in particular a distributing arrangement and a receiving arrangement. The water distributor is constituted by an element or a series of elements, each of which comprises a number of staggered steps I, on which the water spreads. After having spread sufficiently, the water reaches an element comprising one or more series of vertically disposed teeth 2.

These distributors may be formed in diiferent ways. For example they may be formed, as shown in Figure 1, of separate elements constituted by tubes of rectangular section, or of plates bent in L-form. Another simple form of embodiment consists in stamping a thin sheet of metal comprising both the steps and the teeth (Figure 2). The advantage of the latter method is that the weight involved may be extremely small if very thin sheet metal is employed. It is also possible to employ stainless sheet metal, which would be too costly in another apparatus.

The said distributors are disposed parallel and in juxtaposition to one another, so that the whole water-fall coming or overflowing from a receptacle situated above them falls on to one of the elements. To this end, an inclined part may be provided at the top of the distributor, as shown in Figure 2, to receive the water coming from an upper receptacle and to direct it towards the steps.

The liquid-receiving system may be designed in two Ways:

A first simple method consisting in disposing thin elements 3 having parallel inclined surfaces, each of which overhangs, or dips into, a liquidcollecting trough 4 situated in the lower part.

The various elements of the distributing and receiving arrangements are so disposed that any droplet or thin stream of liquid first encounters in its vertical fall a distributing element, and then a receiving element. and that the current vention may be constituted in the following man- 7 ner (Figures 5 and 6):

A tank 6 comprises at the top acistern'l to which the water is delivered. Extending from thiscistern are horizontal tubesB, whichdistribute the water to the troughsi9.

4 in the form of a thin sheet, a plurality of hori-* zontal surfaces arranged in stepped relationship and extending at right angles to the said edges of the troughs, the lowermost element of each of said stepped surfaces being in the form of a substantially vertical wall, the lower horizontal edge of which is serrated whereby the liquid moving downwardly over. said vertical-wall flows tothe apex of each serration and'falls freely therefrom as a droplet, a plurality of lower receptacles disposed below said stepped surfaces for reception of said droplets, and means providing upwardly flowing cooling air currents through -whichsaiddroplets freely fall in passing from The water falls from the said troughs lfby...

overflowing or by any other means on to the distributors I disposed perpendicularly to the troughs.

The water is thenco'llected-by waterreceivers each composed of an oblique straightened metal sheet 3 and ofa trough'l. r

The troughs 4 discharge the water into a lateral collector l3 having-an outlet orifice H.

The air forced by a motor-fan unit [5 passes horizontally in counter-current, into a shell -or sleeve IE; it is rectified by the blades 11 and -is discharged through the top of the apparatus.

I claim: I 7

In a liquid'cooling apparatus, "in combination, an upper receptacle adapted to receive liquid from a source thereof, a' horizontal row of parallel troughs supp'lied by gravity-from said upper receptacle,- the troughs having horizontal edges over which-the liquid over-flows from the troughs receptacles.

said serrations to said lower JOSEPH JACIR.

REFERENCES CITED The following references are of record in the file of this patent:

.UNITED STATES PATENTS Number Name Date 491,964 Fletcher Feb. '14, 1893 905,874 Haverstick Dec. 8, 1908 965,116 Morison July'19, 1910 1;'005,809 Conly eta1 Oct. 17, 1911 1,383,039 I Uhde June 28, 1921 1,399,037 Uhde' Dec. 6, 1921 1,486,032 ,Pourcel Mar. 4, 1924 1,687,542 1 Carrier Oct. 16, 1928 1,785,983 Sebald Dec. '23, 1930 1,948,980 Coffey Feb. 27, 1934 FOREIGN PATENTS Number Country Date 415,581 Great Britain Aug. 30, 1934

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