Патент USA US2402414код для вставки
June 18, 1946. w 4 w. G. KOGEL ‘ REFRI‘GERATION Filed Aug. 25, 1942 ' ‘ ' 2,402,414 I 7 Y2‘ Sheets-Sheet 1 INVENTOR ,4”; ATTORNEY June 18, 1946. > w. G. KOGEL 2,402,414 REFRIGERATION Filed Aqg. 25, 1942 ' ' 2 Sheets-Sheet2 414 A'r'roRNEv' 2,402,414 ' Patented June 18, 1946 UNITED STATES‘ ‘PATENT OFFICE’ Wilhelm Georg Kiigel, Stockholm, Sweden Application August 25,v 1942, Serial No. 455,983 ' ' In Sweden August 27, 19,41 13 Claims. . (CL 62—119.5) l 2 The present invention relatesto absorption re frigerating apparatus of the type in which a heat radiation‘ owing to the overheating. The boiler ' , being " extended downward to a level below the operated- pump maintains liquid circulation through the boiler of the apparatus and in which ‘the heat supply to the pump and the boiler takes place through the medium of a ?ue or like heat transferring member. The object of the inven tion is to make possible a more suitable arrange pump, a corresponding shortening of'the part of the boiler located above the pump may be eifected in many cases, since, in spite of such a shorten-' ‘ ing, the heat-absorbing capacity of the boiler will be su?icient. If desired, the upper part of the boiler may be thermally separated from the ?ue ment of certain parts of the refrigerating appa ‘and formed into a recti?cation column without ' ratus, particularly its liquid heat‘ exchanger and, 10 outer heat supply. . in certain cases, at the same time improve the The invention will in the following be more emciency of the boiler by an improved, recti?ca ' fully, described with reference to the embodi tion of the boiler vapours. ‘ ments shown diagrammatically in the accom It has previously been proposed to give the panying drawings from ‘which the characteristic ‘ boiler the shape of a jacket placed round a ?ue 15 features of the invention will be seen and in and the liquid pump theshape of a tube coil ' 'woundround the lower part of the ?ue located Fig. 1 shows diagrammatically an absorption between the lower edge of the jacket and that refrigerating apparatus operating. with an inert of the ?ue. The poor solution is taken out from gas; Figs. 2, 3 and 4 show a number of modified the boiler through a tube connected to its lowest 26 embodiments of the boiler according to Fig. 1-; part, whereas the supply of rich solution to the and Fig. 5 is a cross-sectional view of the boiler pump takes place through a conduit connected on line 5—-5 in Fig. 2; _ to the pump coil arranged below'the boiler. The In Fig. 1, l0 designates a tube operating as a lower part of the ?ue is thus always cooled by ' ?ue, .to which another tube It is welded'along. a the solution passing through the pump and the 25 common generatrix. Below, the tube H is liquid content of the higher located boiler jacket. closed, whereas, above, it passes into a conduit 28 It has previously been proposed to build into leading to'the condenser it of the apparatus. the boiler insulation besides the boiler and its The tube It serves as a boiler, and the vapours . pump also the liquid heat exchanger of the ap expelled are led through. the conduit 28 ‘to the paratus in order to reduce, in this manner the 30 condenser. The poor solution ?ows through a which losses through radiation. It has, however, proved extremely diiilcult to realize this proposal in actual - ' ' v ' conduit 30, the outer jacket of the liquid heat exchanger l3 and the conduit It to theab'sorbe'r practice, because the liquid heat exchanger must I5 01’ the apparatus. The liquid circulation pump of the apparatus is designated by reference nu bles possibly produced therein can be ‘evacuated 35 meral l2 and is formed of a narrow tube which. ..freely and with certainty. The simplest solu below, is a continuation of the inner tube of ‘the tion of this problem has proved to consist in wind- ' heat exchanger l3 and, above, runs ‘into the‘ ing the exchanger in a coil e. g. concentric with boiler tube ll into which the rich solution is the ?ue and located immediately below the pump. - thus pumped. This solution is supplied through , Especially in the case of gas and oil operation 40 the inner tube of the heat exchanger l3 from this arrangement of the exchanger is, however, the absorber vessel l6 of the apparatus. As al inconvenient owingv to, the di?lculty of disposing ready stated, the refrigerating apparatus shown the heat source. According to the present inven in 1 works with the help of an inert gas, tion all these di?iculties are, however, eliminated, which, in a manner known per se, circulates this being e?ected substantially by extending the 45 through the evaporator of the apparatus, not boiler downwardly from the liquid pump and ar shown, as well as its gas heat exchanger designated ranging the extended part in heat-conducting by reference numeral 20, a conduit 2|,‘ the ab contact with the likewise downwardly extended sorber vessel [6, the absorber IS, the exchanger ?ue. This makes it possible to extend the liquid 20 and ?nally the evaporator. The liquid re heat exchanger in thev manner indicated above 50 ‘frigerant is supplied to the evaporator from the and to place the heat-source on a level with the condenser [8 through a conduit 19 provided witha be arranged in such a manner that the gas bub lower edge of the exchanger or on a lower level - I U-seal. without any overheating of the downwardly ex tended ?ue with its attendant ruining- of the ?ue known per se is, in the embodiment shown, con Finally, a, pressure vessel 25 of a kind nected by means of conduits ‘21 and 26 to the cir ‘ material and high increase of the losses through 56 culation system of the gas. Both thecondenser 2,402,414 3 4 side the boiler tube Ii a suitably concentrically located tube 32 which, below, terminates some what above the bottom or the boiler and into the l8 and absorber it may be air-cooled and, if de sired, provided with cooling ?ns. Asappears from Fig. 1, the poor solution is car ried of! from the boiler tube II from a part of same located substantially higher than the bot tom of the boiler, a pocket without a bottom out upper part of which runs the pump tube i2. In a manner wholly analogous to what has been de scribed in connection with Fig. 2 a regulated flow let being thus formed. This liquid pocket is, how ever, like the remainder of the boiler, in heat the inner tube downwards and along the boiler of boilersolution is obtained in this case from tube H up to the pipe 30 for the poor'solution. Fig. 4 shows a further embodiment of the boiler according to the invention. In this boiler the partition has been replaced by an insert 53 conducting connection with the ?ue l0 and re ceives from the latter considerable quantities of 10 heat. In the embodiment shown, the heat source is, in fact, assumed to be located at the lower mouth of the ?ue ID, the walls of which are thus comprising a band the width of which corre dlrectlyheated. The pump i2 is, along a certain sponds approximately to the inner diameter of prevent said solution being too vigorously boiled and considerably increase the temperature and length, welded to the tube Ill, on a level with or 15 the tube and in which tongues 34 have been punched and alternately bent at right angles to somewhat above the level of the out?ow of the poor solution from the boiler. The connecting > both sides of the band. Inserts of this kind pre viously used in recti?ers possess, as is well known, conduits from the exchanger to the boiler or the the quality of facilitating rectification by, on the pump, respectively, will thus be very simple and short, particularly if the liquid heat exchanger 20 one hand, preventing the'intermixture of differ ent liquid layers and, on the other hand, by ef is arranged in the shape of a tube coil wound fecting an intimate contact betweenthe vapour around the boiler, inclusive of the pump and ?ue, and the liquid. The solution will thus flow in said coil, together with the boiler, being pro the vertical direction only to a very limited ex vided with a hood or the like of heat-insulating tent and for this reason it is not generally suit material, not shown. 'a able to let an insert of this type extend down ' It is generally desirable to e?ect a regulated wards into the pocket of the boiler, as this would circulation of the solution also in the part of make the solution in the pocket extremely poor _ the boiler‘ located below the pump in order to out, as‘ otherwise its refrigerant concentration 30 the pressure. In the device according to Fig. 4 there does not, however even if the insert termi ' would be too low. In Order to bring about such nates above the tube 30, ensue any regulated a circulation it is possible as shown diagrammat ?ow in the pocket, but it has been proved that the movement of boiler solution is enough for somewhat above the bottom of the boiler and, 35 preventing an increase of temperature disturb ing the operation. above, somewhat above the entry of the pump The invention may be varied in several ways, tube into the boiler tube ll. Fig. 5 shows dia without departing from the spirit of the inven grammatically a-cross section along the line 5-—5 tion, and is not thus limited to- the examples ‘ of the boiler tube ii in Fig, 2. The partition 3! shown diagrammatically. Therefore, without is suitably welded along the inner surface of the limiting myself in this respect, the invention is tube by spot welding which may be e?ected elec de?ned by the appended claims: ' trically with two electrodes disposed diametri I claim: a cally on the outside of the tube. The partition 1. In an absorption type refrigerating system, , is so disposed that the relatively rich solution an upright heating ?ue, and a circuit for ab raised by the pump is supplied to the tube half sorption liquid including a generator vessel hav located nearest to the ?ue where the boiling of ing a wall in heat transfer relation with said the solutioncontinues, its concentration gradu ?ue, an absorber, and a heat operated vapor lift ally decreasing. By. the raised liquid. the liquid conduit separate from and outside of said gen column in said boiler half is continually pressed ically in Fig. 2, to insert a partition 3! into the boiler tube Ii, said partition terminating below downward, passing at the bottom to the boiler . half located on the left in the upward direc tion and beingsupplied to the absorber through the conduit an and the heat exchanger it. In the part of the left half of the boiler'located above the pipe 30. for the poor solution a boiling out also takes place, partly owing to direct heat transfer through the partition 3i and by way of the jacket wall‘of the‘tube from the ‘hue, partly generally also through the rising vapour.’ The solution in the upper part of the left boiler half 00 is, in fact, generally richer ‘than any other so- " lution in the-boiler, this being due tothe fact . erator and having a heat receiving and vapor forming part which is in heat transfer relation with said ?ue and arranged in said circuit to receive liquid from said absorber and deliver liq uid to said generator, the heat transfer relation - between said generator and ?ue being at least in part at an elevation below that of said pert oi’ said vapor lift conduit. 2. In an absorption type refrigerating system. an upright heating ?ue, and a circuitnfor absorp tion liquid including a generator vessel having a wall in heat transfer relation with said ?ue, an ' ‘ absorber, a heat operated vapor lift conduit sep ‘that the condensate precipitated in the vapour arate from and outside of‘ said generator and tube 28 and arecti?er arranged; if desired, be hind said tube ?ows down along the bottom of’ . which is in heat transfer relation with said- ?ue ‘ the vapour tube into the left‘ boiler hali‘. It is ' having a heat receiving and vapor forming part and arranaed‘in said circuit to receive liquid from said absorber and deliver ‘ liquid to said genera a regulated flow-through the pocket of the boiler ' ton-the heat transfer relation between said ‘gen ‘,butalso a certain‘ rectification of vthe boiler va-_ . erator and ?ue being at least in part at an ele - , .pours,the vapours‘ expelled from the lower parts .70 vation below that of said Part of said vapor lift conduit,_a_nd a conduit for conducting to said ab ‘of the boilerand relatively : rich in-;_absorption, medium being forced to pass through liquid lay; ' sorber liquid from said generator, said last con _' duit communicating with' said generator so that ers having a higher concentration. Instead of a simple partition it is possible, as ' the lowerpart'of said separator. forms a liquid shown diagrammatically in Fig, 3, to arrange in 76 pocket below the conduit. _ thus vevident that the partition not only effects 2,402,414. . 6 5 and.- said generator is provided internally with a tubular partition wall dividing the generator 3. A system as set forth in claim 2 in which said generator is provided internally with ba?ie structure for directing movement of ?uid therein.. into chambers communicating at their upper and ' 4. A system as set forth in claim 2 in which lower ends. said generator is provided internally with wall structure for directing ?ow of liquid therein in a path running through said pocket. . 11. A system'as set forth in claim 1 in which said generator is provided internally with a par tition dividing the generator into chambers com-' municating at their upper and lower ends. _12. An absorption type refrigeration system em 5. A system as set forth in claim 1 in which said generator is provided internally with baiile structure to direct movement of ?uid'therein. -10 ploying inert gas and having a generator with an outlet a substantial distance above the bot 6. A system as set forth in claim 1 in which tom thereof, said outlet forming a pocket in the generator therebelow holding a body of liquid out of circulation in the system, and a heating in downward in one part of the generator and 15 ?ue arranged in heat conductive relation with upward in another part of the generator. one side of the generator vessel to cause local 7. A system as set forth in claim 2 in which circulation of the pocketed body of liquid; I said generator is a tube secured in thermal con 13. An absorption‘ type refrigeration system em tact to said ?ue and closed at its lower end. said generator is provided internally with'wall structure arranged to cause ?ow of vliquid there- > ploying inert gas and having a vessel with an 8. A system as set forth in claim 2 in which said circuit for absorption liquid also includes a 20 outlet a substantial distance above the bottom thereof, said outlet forming a pocket in the V65 heat exchanger in the form of a tube coil located sel therebelow holding a body of liquid out of around the liquid pocket part of said generator. circulation in the system, and a heating conduit 9. A system as set forth in claim 2 inwhich arranged in heat conductive relation with onev said generator is provided internally with baf?e structure in the upper part thereof to form a rec- 35 tifying column. - ' . 10. A system as set forth in claim 2 in which said generator is a tube closed at its lower end, _ v vessel to cause local circulation of the side of the pocketed body of liquid. GEORG KOGEL.