Патент USA US2121999код для вставки
June 28, 1938. 2,121,999 G. TREPAUD’ VERTICAL HEAT EXCHANGER Filed May 2 , 1936 OO lNVENTOFY BY: G'EORQEs TREPHUQ , 67%, HTT‘ORNEY " Patented June 28,‘ 193-8 ‘ , 2,121,999 - PATENT ‘OFFICE’ 2.12-1.99!) UNITED STATES ‘ VERTICAL HEAT EXCHANGER Georges Trépaud, La Rochelle, France \ ' ' Application May 2, 1936, Serial No. 77,462 In France May 7, 1935 ,1 _Claim.. (01. 357-224) e In the accompanying drawing given byway of The heat exchangers or Vaporizers as used at present in the apparatuses for the production of cold are of cliiferent systems according to the amount of heat to. be extracted. For the small example only: constructed according to the invention. _ Fig. 2 is a horizontal section of the tubular 5 I 3 powers, the brine cooling device is "constituted by a bundle- of double concentric tubes which bundle or host. ‘are horizontally disposed, the brine circulating‘ in central pipes, whilst the cold producing 'me dium, ammonia for instance, passes through the 10 annular space existing between the walls of the concentric tubes. '. ' ' » Fig. 1 shows in vertical section an. evaporator . ' . Fig. -3 shows diagrammatically the path fol lowed by the‘brine in the-tubular body. - , Fig.v 4 is an elevation and Fig. 4a a plan view of one of the 'ba?les. _ , . Fig. 5 is a. horizontal section showing a modi ' fled form‘ of construction. As regards the great power apparatuses, use is made either of the apparatuses comprising a The vertical evaporator with accelerated cir brine container, or of apparatuses comprising a culation for the production of cold consists in three parts: a tubular body in which the ex ~15 cylindrical cooler. In the ?rst case, there is dis posed in a tank a vaporizing coil which is placed ' change of heat takes place, a dome for collect horizontally and which is immersed in the brine ing the fumes or vapours of the cold producing » __contained in the vat; the circulation of the brine liquid, ammonia for instance, and a collector in' along the walls of the coil is most often obtained. which the liquid is collected. by meansof a screw operated'by a devicesitu The'tubular body is constituted by a vertical ferrulel, closed by two plates 2, 3, in which are . ated outside the vat. 1 _ _ - it . beaded the ‘ends of ‘the tubes 34 of the bundle. . In the apparatuses with cylindrical cooler, the’ _ vaporizing part is constituted by a horizontal The tubes 4 are of small diameter in order to tubular bundle disposed in a cylindrical tank; increase the surface of contactof the ?uids. In plates, situated at a certain distance from'the the central part of the plates 2, 3 is secured the 25’ end of a tube of‘ large diameter 5. The ferrule l is provided at its lower and upper parts with pipes 6, 1 allowing the same 'to be connected to the circuit of the brine. The brine circulates around tubes .4 in the 30 annular spaces ‘comprised between baffles 8, 9 '25 , bottoms of said tank, are connected through tubes and by means of ba?le plates, disposed in . every end chamber, increase the ooe?icient of exchange between‘the two ‘?uids. The brine is 30 set in circulation in the tubes, whilst the cold generating ?uid circulates around the tubes in the tank surrounding the same. The results ob tained with these vtwo sorts of apparatuses are and 9, 8, etc. During its passage between two bailles, the brine strikes the external surface of the evapo rating tubes 4 in the contact with‘ which the 35 exchange of heat as looked for takes place. The rate of circulation about the wall of the tubes is accelerated by the ba?les. The long course of the brine around the tubes not always satisfying. 35 The heat exchanging evaporating device form ing the subject matter of the invention, being disposed vertically, the circulation of the ?uids takesplace much more freely than in the hori zontal apparatuses and in a much more active 40 manner, whence a much more rapid exchange of heat results. ’ s " The said apparatus is essentially constituted by a vertical. tubular body, surmounted by a 'steam dome and provided at its lower part with 45 a liquid collector. vThe cylindrical bodyv is con nected to the brine circuit through the usual apparatuses and the tubular bundle with the freezing liquid compressor or with any other 50 similar machine or fume sucking device. One of the mainfeatures of the invention con containing the cold producing liquid allows the . same to absorb the calories accumulated during the use in causing a vaporization of the cold producing liquid. ' . ' The opening l0, provided in every baille, is shifted off relatively to the following one according to an angle of about 60° so, that the brine will have imparted thereto a continuous move ment which can be compared to a helical movement about the central tube 5. Fig.- 3 shows sists, moreover, in the fact that‘ the tubular clearly the circuit e?ected by the brine between 50 the ba?les. The opening l0 instead of being a bundle or nest is "combined with walls so ar radial one could be a segmental one and be diam ranged in the tubular body containing the-same . that the ?uid circulating in this space follows 55 a helical movement along the tubes. ' etrally opposed when the ba?les are mounted vso as to impart to the brine a coil motion. It must be understood that the size of the opening 55 2,121,999 2 to can be adapted to the conditions which pre- , through the pipe 22. vail in every case. Thus, for instance, the said openings can be of 120° when the baiiies are in be very close together. ' exhausted through the pipe 23 in the direction of the dome. " The spacing of the ba?ies is maintained, on the one part, by the part 8’ bent at right angle (Fig. 4) and, on the other hand, by means of tubular struts ll, disposed about the tubes 4; a few struts 0n the upper part of the dome is disposed a tube 24 allowing the exhaust of air when the will sumce. the tubular bundle and the brine passes around 10 ' The result obtained with. the ba?ies is substan 10 tially as satisfying as the one which is obtained by means of an endless screw; howeverlwith this ’ advantage that the construction is more simple 15 The vapours or ‘fumes which can be produced in the_1iquid tank are and consequently less expensive. The tubular body is surmounted by a dome l2 secured by a strap l3 and provided internally apparatus is set in motion; It is 'to be observed that in the above described evaporator, the cold producing ?uid circulates in the walls of the_tubes of the said bundle. Finally, it must be observed that the central tube 5 used for the return of the currents of the tubular bundle could be‘ replaced by several tubes 15 25, as. shown in Figure 5. The embodiment which has been described and which is represented has of course been given with a de?ector ll- disposed in front of a tubular bundle. The said de?ector is formed of two ‘by way. of example only and it ‘will be under frustums connected together byv means of their ‘stood that its details may vary without depart 20 small bases; the same is intended to stop the boiling liquid and to direct the same towards the central tube 5 so that it can be taken over by the liquid circuit circulating in the bundle. The vapour which is carried along with the 25 boiling liquid is directed towards the upper part of the dome in passing through the baiiles “a provided with holes drying the same entirely in stopping the drops of liquid which might have been driven along by the same. The said ba?les 30 “a are also used as struts for supporting the suction pipe I5 of the compressor. ' The steam ing from the principle of the invention. I claim, 20 ' A vertical heat exchanger comprising a verti cal casing, upper and lower tube sheets mounted in said casing and dividing the same in an upper chamber, a middle chamber and a lower cham her, a vertical ‘central tube ‘of large diameter axially disposed in the-casing between the said tube sheets and connecting said lower chamber to said upper chamber, vertical tubes of small diameter disposed in the annular space formed 30 between the saidv casing and central tube and supply is provided with a sprinkler l6’ dividing also connecting the lower chamber to the upper circuit of the cold producing ?uid. The said oil can be removed very easily through the ex part. of the said de?ector overlying the upper ends of the said vertical tubes of small diameter so as to reject liquid projected out of said tubes and direct it into said central tube, and the 45 upper part of said de?ector guiding liquid sepa rated in said 'upper chamber also into said cen tral tube. the steam and retaining the last liquid particles chamber, means for admitting a liquid reiriger-. ant into said central tube, means for withdraw driven along by the steam. The tubular body is formed at its lower part ing vapors from said upper chamber, means for 35 35 by‘ a collector'i'l in the central part of which admitting a ?uid to said annular space and for is disposed a separator l8 provided with ports l9 withdrawing said ?uid from said annular space, in connection with an exhaust pipe 20. The said ba?le plates mounted in said annular space so separator is adapted to stop the oil carried along as to provide a substantially helical path for the ?uid, and a double-frustrum shaped de?ector 40 by the ammonia in being collected under the -mounted in the said upper chamber, the lower separator, thereby insulating the same from the haust pipe 20. 45 _ The cold producing ?uid returns to the tubu lar body through the pipe 2| by means of a tap provided with a ?oat automatically regulat ing the height of the liquid contained in the said tubular body. The collector i1 is also in con 50 nection with the tank containing the ?oat tap / GEORGES TREPAUD. 5.