WO2001067009A1 - Plate exchanger - Google Patents

Plate exchanger Download PDF

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Publication number
WO2001067009A1
WO2001067009A1 PCT/FR2001/000662 FR0100662W WO0167009A1 WO 2001067009 A1 WO2001067009 A1 WO 2001067009A1 FR 0100662 W FR0100662 W FR 0100662W WO 0167009 A1 WO0167009 A1 WO 0167009A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
exchanger according
fluid
exchanger
distributor
Prior art date
Application number
PCT/FR2001/000662
Other languages
French (fr)
Inventor
Marc Altazin
André Bailly
Jean-Michel Croiset
Romuald Jurkowski
Slimane Meziani
Jean-Marie Michaud
Original Assignee
Compagnie Industrielle D'applications Thermiques
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Industrielle D'applications Thermiques filed Critical Compagnie Industrielle D'applications Thermiques
Priority to DE60122867T priority Critical patent/DE60122867T2/en
Priority to AU2001239340A priority patent/AU2001239340A1/en
Priority to EP01913933A priority patent/EP1261829B1/en
Publication of WO2001067009A1 publication Critical patent/WO2001067009A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

Abstract

The invention concerns an exchanger (2) comprising several plates (6) defining first (8) and second (10) series of independent flow channels, respectively for circulating the diphasic refrigerating fluid and a fluid to be cooled, comprising a feeder channel (14) for the diphasic refrigerating fluid emerging into an intake collecting zone (28) extending opposite the first channels (8). Said feeder pipe (14) is equipped with a distributor (20) of said diphasic refrigerating fluid, said distributor comprising a plate provided with perforations (24), said perforated plate being interposed on the flow path of said diphasic refrigerating fluid.

Description

ECHANGEUR DE CHALEUR A PLAQUES PLATE HEAT EXCHANGER
La présente invention concerne un échangeur de chaleur à plaques .The present invention relates to a plate heat exchanger.
De manière habituelle, un échangeur de chaleur à plaques est composé de plaques superposées entre elles qui, après brasage, soudage ou serrage, forment deux séries de canaux de circulation, permettant l'écoulement d'un fluide réfrigérant et d'un fluide à refroidir. Il est par ailleurs prévu des moyens mécaniques permettant de rendre indépendantes ces deux séries de canaux, de sorte que le réfrigérant et le fluide à refroidir n'entrent pas en contact mutuel.Usually, a plate heat exchanger is composed of superposed plates which, after soldering, welding or clamping, form two series of circulation channels, allowing the flow of a refrigerant and a fluid to be cooled. . Mechanical means are also provided for making these two series of channels independent, so that the refrigerant and the fluid to be cooled do not come into mutual contact.
L'invention vise plus particulièrement un échangeur à plaques, destiné à être alimenté par un fluide réfrigérant diphasique, comprenant une fraction liquide et une fraction vapeur lors de son admission dans cet échangeur. Lorsque ce fluide diphasique s'écoule dans les canaux de circulation correspondants, il est sujet à une vaporisation de sa fraction initialement liquide, qui permet le refroidissement du fluide à refroidir s 'écoulant dans les canaux adjacents.The invention relates more particularly to a plate exchanger, intended to be supplied with a two-phase refrigerant, comprising a liquid fraction and a vapor fraction when it is admitted into this exchanger. When this two-phase fluid flows in the corresponding circulation channels, it is subject to vaporization of its initially liquid fraction, which allows the cooling of the fluid to be cooled flowing in the adjacent channels.
De manière connue, un tel échangeur à plaques comprend une canalisation d'amenée du fluide diphasique réfrigérant, qui débouche dans une zone collectrice de ce fluide. Cette zone s'étend en regard de l'ensemble des canaux de circulation, c'est-à-dire longitudmalement en faisant référence à la direction principale d'écoulement du fluide réfrigérant, en sortie de la canalisation d'amenée précitée.In known manner, such a plate exchanger comprises a pipe for supplying the two-phase refrigerant fluid, which opens into a collecting zone of this fluid. This zone extends opposite all of the circulation channels, that is to say longitudinally with reference to the main direction of flow of the refrigerant, at the outlet of the above-mentioned supply line.
Les échangeurs de chaleur à plaques évoqués ci -dessus présentent certains inconvénients. En effet, leurs performances augmentent de façon à peu près linéaire avec le nombre de plaques qui les équipent, jusqu'à une valeur seuil correspondant à environ 50 à 60 plaques, à savoir entre 25 et 30 canaux de circulation du fluide réfrigérant et du fluide à réfπgé- rer. Au-delà de cette valeur seuil, les performances de 1' échangeur ont tendance à stagner, voire à décroître au fur et à mesure que l'on augmente le nombre de plaques de 1' échangeur, et donc sa dimension. Ceci est préjudiciable, dans la mesure où l' échangeur se voit limité dans ses performances .The plate heat exchangers mentioned above have certain drawbacks. In fact, their performance increases in a roughly linear manner with the number of plates which equip them, up to a threshold value corresponding to approximately 50 to 60 plates, namely between 25 and 30 channels of circulation of the coolant and the fluid. to refere. Beyond this threshold value, the performance of the exchanger tends to stagnate, or even decrease as the number of plates of the exchanger, and therefore its size, is increased. This is detrimental, insofar as the exchanger is limited in its performance.
Afin de pallier ces inconvénients, l'invention se propose de réaliser un échangeur de chaleur à plaques dont les performances sont améliorées par rapport à l'art antérieur, et continuent en particulier à augmenter au-delà de la valeur seuil de plaques de cet échangeur, dont il est fait mention précédemment .In order to overcome these drawbacks, the invention proposes to produce a plate heat exchanger whose performance is improved compared to the prior art, and in particular continue to increase beyond the threshold value of plates of this exchanger , which is mentioned above.
A cet effet, elle a pour objet un échangeur de chaleir à plaques, comprenant plusieurs plaques, logées dans le volume intérieur de l' échangeur et définissant des première et seconde séries de canaux de circulation indépendants, respectivement pour la circulation d'un fluide diphasiσae réfrigérant et d'un fluide à réfrigérer, ledit échangeur comprenant également une canalisation d'amenée du fluiae diphasique réfrigérant débouchant dans une zone collectrice d'entrée s'étendant en regard desdits premiers canaux, caractérisé en ce que ladite canalisation d'amenée est équipée d'un distributeur dudit fluide réfrigérant diphasique, ce distributeur comprenant une plaque pourvue de perforations, ladite plaque perforée étant interposée sur le trajet d'écoulement dudit fluide réfrigérant diphasique.For this purpose, it relates to a plate heat exchanger, comprising several plates, housed in the interior volume of the exchanger and defining first and second series of independent circulation channels, respectively for the circulation of a diphasiσae fluid. refrigerant and a fluid to be refrigerated, said exchanger also comprising a supply line for the two-phase refrigerant fluid opening into an inlet collecting zone extending opposite said first channels, characterized in that said supply line is equipped a distributor of said two-phase refrigerant, this distributor comprising a plate provided with perforations, said perforated plate being interposed on the flow path of said two-phase refrigerant.
L'invention va être décrite ci-dessous, en référence aαx dessins annexés, donnés uniquement à titre d'exemples non limitatifs et dans lesquels :The invention will be described below, with reference to ααx appended drawings, given only by way of nonlimiting examples and in which:
- la figure 1 est une vue en coupe partielle d' -n échangeur de chaleur à plaques conforme à l'invention ;- Figure 1 is a partial sectional view of -n plate heat exchanger according to the invention;
- la figure 2 est une vue de face, illustrant an distributeur de fluide diphasique réfrigérant, équipant 1 ' échangeur de la figure 1 ; les figures 3 à 6 sont des coupes axiales illustrant trois variantes de réalisation du distributeur de la figure 2 ;- Figure 2 is a front view, illustrating a distributor of two-phase refrigerant, fitted to the exchanger of Figure 1; Figures 3 to 6 are axial sections illustrating three alternative embodiments of the dispenser of Figure 2;
- la figure 7 est une vue de face illustrant le distributeur représenté à la figure 6 ; et- Figure 7 is a front view illustrating the dispenser shown in Figure 6; and
- les figures 8 et 9 sont des vues en coupe axiale, analogues aux figures 3 à 6, illustrant des quatrième et cinquième variantes de réalisation du distributeur équipant 1 ' échangeur de la figure 1.- Figures 8 and 9 are views in axial section, similar to Figures 3 to 6, illustrating fourth and fifth alternative embodiments of the distributor fitted 1 exchanger of figure 1.
L' échangeur de chaleur à plaques illustré sur la figure 1, qui est désigné dans son ensemble par la référence 2, renferme plusieurs plaques 6 s'étendant parallèlement, qui définissent des première 8 et seconde 10 séries de canaux, disposés de façon alternée. De façon connue, il est prévu des moyens permettant d'empêcher la communication entre deux canaux 8, 10 adjacents. Ces moyens, qui peuvent par exemple être réalisés par emboutissage, sont représentés de façon schématique, dans un but de clarté, par des lignes de séparation 12.The plate heat exchanger illustrated in Figure 1, which is designated as a whole by the reference 2, contains several plates 6 extending in parallel, which define first 8 and second 10 series of channels, arranged alternately. In known manner, means are provided for preventing communication between two adjacent channels 8, 10. These means, which can for example be produced by stamping, are shown schematically, for the sake of clarity, by dividing lines 12.
L' échangeur 2 comprend également une canalisation d'amenée 14 d'un fluide diphasique réfrigérant, destiné à s'écouler dans les premiers canaux 8. Cette canalisation 14 est munie d'un épaulement périphérique 16, contre lequel vient en butée un raccord 18 permettant l'alimentation de ce fluide réfrigérant .The exchanger 2 also comprises a supply pipe 14 for a two-phase refrigerant fluid, intended to flow in the first channels 8. This pipe 14 is provided with a peripheral shoulder 16, against which a connector 18 abuts allowing the supply of this coolant.
L' échangeur 2 comprend également, de façon classique, une sortie du fluide réfrigérant, ainsi qu'une entrée et une sortie d'un fluide à refroidir, toutes trois non représentées.The exchanger 2 also conventionally includes an outlet for the refrigerant, as well as an inlet and an outlet for a fluid to be cooled, all three not shown.
Par ailleurs, un distributeur 20 est intercalé entre l' épaulement 16 et l'extrémité en regard du raccord 18. Comme le montre la figure 2, ce distributeur est formé d'une plaqueFurthermore, a distributor 20 is interposed between the shoulder 16 and the opposite end of the connector 18. As shown in Figure 2, this distributor is formed of a plate
21 présentant une forme de disque. Cette plaque comprend une partie centrale 22 dans laquelle sont ménagées des perforations 24, et autour de laquelle s'étend une bordure 26 plane annulaire, destinée à la fixation de la plaque 20 sur l' épaulement 16. La bordure 26 peut être pleine ou perforée, et peut être assujettie à l' épaulement 16 par l'intermédiaire d'une fixation mécanique ou par soudure, ou bien encore être simplement plaquée contre cet épaulement 16, par l'extrémité en regard du raccord 18.21 having a disc shape. This plate comprises a central part 22 in which perforations 24 are formed, and around which extends an annular planar border 26, intended for fixing the plate 20 on the shoulder 16. The border 26 can be solid or perforated , and can be secured to the shoulder 16 by means of a mechanical fixing or by welding, or even be simply pressed against this shoulder 16, by the opposite end of the fitting 18.
Le diamètre de ces perforations varie en fonction de différents paramètres, en particulier de la taille de la plaque, du débit de fluide réfrigérant et des propriétés physico- chimiques de ce dernier. En tout état de cause, leur diamètre est supérieur à 0,1 mm.The diameter of these perforations varies as a function of different parameters, in particular the size of the plate, the flow rate of the refrigerant fluid and the physicochemical properties of the latter. In any event, their diameter is greater than 0.1 mm.
En service, le fluide réfrigérant diphasique est admis par le raccord 18, via le distributeur 20, dans la canalisation d'amenée 14. Puis, ce fluide débouche dans un collecteur, ou zone de collecte d'entrée 28, qui s'étend longitudmalement selon la direction d'écoulement de ce fluide. Cet e zone de collecte 28 est ainsi disposée en regard de l'ensemble des canaux 8, 10. Le fluide alimente alors la première série de canaux 8, alors qu'un fluide à refroidir est par ailleurs admis dans la seconde série de canaux 10.In service, two-phase refrigerant is allowed by the connector 18, via the distributor 20, in the supply pipe 14. Then, this fluid opens into a collector, or inlet collection zone 28, which extends longitudinally in the direction of flow of this fluid . This collection zone 28 is thus arranged facing all of the channels 8, 10. The fluid then feeds the first series of channels 8, while a fluid to be cooled is moreover admitted into the second series of channels 10 .
La figure 3 représente une variante de l'invention, dans laquelle le distributeur 30 est formée d'une plaque 31 qui comprend une partie centrale 32 bombée, formant une calotte sphérique s'étendant en direction du débouché 15 de la canalisation 14. Cette calotte 32, dans laquelle sont ménagées des perforations 34, est entourée par une bordure 36 péπphé- πque plane permettant la fixation du distributeur 30 contre 1 ' épaulement 16.FIG. 3 represents a variant of the invention, in which the distributor 30 is formed of a plate 31 which comprises a domed central part 32, forming a spherical cap extending in the direction of the outlet 15 of the pipe 14. This cap 32, in which perforations 34 are provided, is surrounded by a plane peripheral edge 36 allowing the dispenser 30 to be fixed against the shoulder 16.
Les figures suivantes illustrent des variantes de réalisation de l'invention, dans lesquelles le distributeur est pourvu de moyens permettant d'augmenter la vitesse d'écoulement du fluide diphasique réfrigérant.The following figures illustrate alternative embodiments of the invention, in which the distributor is provided with means making it possible to increase the flow speed of the two-phase refrigerant fluid.
A la figure 4, le distributeur 40 est formé d'une plaque 41 qui possède une calotte centrale 42, de même forme que la calotte 32. Cette calotte 42 est pourvue de perforations 44 s'étendant uniquement à sa périphérie, de façon à former une zone centrale pleine 45. La calotte 42 est par ailleurs entourée d'une bordure 46, analogue à celle 26.In FIG. 4, the distributor 40 is formed of a plate 41 which has a central cap 42, of the same shape as the cap 32. This cap 42 is provided with perforations 44 extending only at its periphery, so as to form a full central zone 45. The cap 42 is also surrounded by an edge 46, similar to that 26.
A la figure 5, la calotte 52 de la plaque 51 du distributeur 50 est percée, sur l'ensemble de sa surface, de perforations 54. Il est par ailleurs prévu une pastille 55, qui est rapportée à l'intérieur de la calotte 52 suivant une corde de cette dernière. Le distributeur 50 est pourvu d'une bordure périphérique 56 de fixation contre l' épaulement 16.In FIG. 5, the cap 52 of the plate 51 of the distributor 50 is pierced, over its entire surface, with perforations 54. There is also provided a pellet 55, which is attached to the inside of the cap 52 following a cord of the latter. The distributor 50 is provided with a peripheral edge 56 for fixing against the shoulder 16.
Le distributeur 60 représenté aux figures 6 et 7 comprend une plaque 61 dont la calotte centrale 62 est munie de perforations 64 sur l'ensemble de sa surface. Ce distributeur 60 est équipé d'un corps conique 65 dont la base 65' est fixée à l'intérieur de la calotte 62, et dont la pointe 65'' est dirigée à l'opposé du débouché 15. Le corps 65 est fixé à la calotte 62 par tou; moyen approprié, en particulier par vissage .The dispenser 60 shown in Figures 6 and 7 comprises a plate 61, the central cap 62 is provided with perforations 64 over its entire surface. This distributor 60 is equipped with a conical body 65 whose base 65 'is fixed inside the cap 62, and whose tip 65''is directed opposite the outlet 15. The body 65 is fixed to the cap 62 per tou; suitable means, in particular by screwing.
Le corps conique 65 est pourvu, sur sa surface extérieure, de rainures longitudinales non représentées, s'étendant parallèlement à l'axe de ce corps 65, c'est-à-dire parallèlement à la direction d'écoulement du fluide diphasique dans la canalisation 14. Ces rainures permettent l'alimentation de la zone située derrière la base du cône, entre ce dernier et la calotte 62. Ce distributeur 60 est pourvu d'une bordure périphérique 66 de fixation.The conical body 65 is provided, on its outer surface, with longitudinal grooves, not shown, extending parallel to the axis of this body 65, that is to say parallel to the direction of flow of the two-phase fluid in the pipe 14. These grooves allow the supply of the area behind the base of the cone, between the latter and the cap 62. This distributor 60 is provided with a peripheral edge 66 for fixing.
La figure 8 illustre un distributeur 70 comprenant une plaque 71 dont la calotte bombée 72 est pourvue de perforations 74. Une bille 75, de rayon de courbure inférieur à celui de la calotte 72, est fixée à l'intérieur de la calotte 72. Cette dernière est entourée par une bordure périphérique 76 de fixation.FIG. 8 illustrates a dispenser 70 comprising a plate 71, the domed cap 72 of which is provided with perforations 74. A ball 75, with a radius of curvature less than that of the cap 72, is fixed inside the cap 72. This the latter is surrounded by a peripheral fixing edge 76.
A la figure 9, le distributeur 80 comprend une plaque 81 dont la calotte bombée 82 est pourvue de perforations 84. Ce distributeur 80 est pourvu d'un insert 85, ou organe rapporté, formé d'une partie cylindrique 85' adjacente à la calotte, et d'une extrémité conique 85" s'étendant vers l'amont, en référence à l'écoulement du fluide. Il est par ailleurs prévu une bordure périphérique 86 de fixation.In FIG. 9, the distributor 80 comprises a plate 81, the domed cap 82 of which is provided with perforations 84. This distributor 80 is provided with an insert 85, or added member, formed of a cylindrical part 85 'adjacent to the cap , and a conical end 85 "extending upstream, with reference to the flow of the fluid. There is also provided a peripheral edge 86 for fixing.
L'invention n'est pas limitée aux exemples décrits et représentés. En effet, on peut notamment prévoir de munir une plaque plane, analogue à celle 21, d'un cône 65, d'une bille 75 ou d'un insert 85 tels que décrits aux figures 6 à 9.The invention is not limited to the examples described and shown. In fact, provision may in particular be made for providing a flat plate, similar to that 21, with a cone 65, a ball 75 or an insert 85 as described in FIGS. 6 to 9.
L'invention permet de réaliser les objectifs précédemment mentionnés . En effet, la Demanderesse a constaté que la stagnation, voire la diminution des performances d'un échangeur de chaleur à plaques, intervenant au-delà d'une valeur seuil de plaques, était principalement due à la séparation entre les phases du fluide réfrigérant, intervenant dans la zone de collecte d'entrée de l' échangeur.The invention makes it possible to achieve the objectives mentioned above. Indeed, the Applicant has found that the stagnation, or even the decrease in performance of a plate heat exchanger, occurring beyond a threshold value of plates, was mainly due to the separation between the phases of the refrigerant, intervening in the entry collection area of the exchanger.
Ainsi, lorsque 1 ' échangeur comporte un nombre de plaques inférieur ou égal à cette valeur critique, le fluide diphasique reste bien mélangé. En revanche, lorsque cet échangeur est muni d'un plus grand nombre de plaques, il se produit une séparation de phases du fluide réfrigérant, de sorte que les canaux opposés à l'entrée de ce dernier sont mal alimentés, ce qui induit une baisse correspondante du rendement de l' échangeur.Thus, when the exchanger has a number of plates less than or equal to this critical value, the two-phase fluid remains well mixed. On the other hand, when this exchanger is provided with a greater number of plates, there occurs a phase separation of the refrigerant, so that the channels opposite the inlet of the latter are poorly supplied, which induces a corresponding decrease in the efficiency of the exchanger .
Conformément à l'invention, la présence des perforations, dont est pourvu le distributeur, génère des turbulences d- fluide et donc assure un mélange efficace des deux phases qu le constituent. On obtient dans ces conditions une homogénéi- sation efficace de ce fluide diphasique le long de la zone de collecte, même dans le cas d'un échangeur pourvu d'un nombre élevé de plaques. Par ailleurs, le distributeur conforme à l'invention assure une bonne répartition du fluide diphasique dans ces différents canaux, en ce sens que chaque canal es non seulement alimenté par un mélange homogène mais que, de surcroît, les débits de fluides diphasiques alimentant les différents canaux sont sensiblement identiques.According to the invention, the presence of the perforations with which the dispenser is provided generates turbulences of the fluid and therefore ensures an effective mixing of the two phases which constitute it. Under these conditions, an efficient homogenization of this two-phase fluid is obtained along the collection zone, even in the case of an exchanger provided with a high number of plates. Furthermore, the distributor according to the invention ensures a good distribution of the two-phase fluid in these different channels, in the sense that each channel is not only supplied by a homogeneous mixture but that, moreover, the flow rates of two-phase fluids supplying the various channels are substantially identical.
Le distributeur équipant 1 ' échangeur à plaques de l'invention présente une structure simple et génère des coûts faibles. De plus, ce distributeur est particulièrement commode d'emploi, dans la mesure où il peut être rapporté en même temps que le raccord d'alimentation en fluide. De plus, ce distributeur est robuste et induit peu de pertes de charges . Enfin, il engendre peu de perturbations de l'écoulement, lors de l'inversion de cycles de 1 ' échangeur .The distributor equipping the plate exchanger of the invention has a simple structure and generates low costs. In addition, this dispenser is particularly convenient to use, insofar as it can be attached at the same time as the fluid supply connection. In addition, this distributor is robust and induces little pressure drop. Finally, it generates little disturbance of the flow, when the cycles of the exchanger are reversed.
Le fait d'équiper le distributeur d'une calotte bombée est avantageux. En effet, cette mesure confère une homogénéisation particulièrement avantageuse du fluide diphasique, avant son admission dans la zone de collecte d'entrée. Prévoir des moyens d'augmentation de la vitesse d'écoulement du fluide est tout particulièrement avantageux. En effet, ces moyens engendrent des turbulences qui assurent un mélange efficace des deux phases du fluide réfrigérant. En particulier, la présence d'un corps conique, ou d'une bille favorise l'éclatement du fluide réfrigérant, et sa division en direction des perforations de la plaque. Equipping the dispenser with a domed cap is advantageous. Indeed, this measure gives a particularly advantageous homogenization of the two-phase fluid, before its admission into the inlet collection zone. Providing means for increasing the speed of flow of the fluid is particularly advantageous. Indeed, these means generate turbulence which ensures an effective mixing of the two phases of the refrigerant. In particular, the presence of a conical body, or of a ball promotes the bursting of the refrigerant, and its division in the direction of the perforations of the plate.

Claims

REVENDICATIONS
1. Echangeur de chaleur (2) à plaques, comprenant plusieurs plaques (6) , logées dans le volume intérieur dudit échangeur et définissant des première (8) et seconde (10) séries de canaux de circulation indépendants, respectivement pour la circulation d'un fluide diphasique réfrigérant et d'un fluide à réfrigérer, ledit échangeur (2) comprenant également une canalisation d'amenée (14) du fluide diphasique réfrigérant débouchant dans une zone collectrice d'entrée (28) s'étendant en regard desdits premiers canaux (8) , caractérisé en ce que ladite canalisation d'amenée (14) est équipée d'un distributeur (20 ; 40 ; 50 ; 60 ; 70 ; 80) dudit fluide réfrigérant diphasique, ce distributeur comprenant une plaque1. Plate heat exchanger (2), comprising several plates (6), housed in the interior volume of said exchanger and defining first (8) and second (10) series of independent circulation channels, respectively for the circulation of a two-phase refrigerant fluid and a fluid to be refrigerated, said exchanger (2) also comprising a supply pipe (14) for the two-phase refrigerant fluid opening into an inlet collecting zone (28) extending opposite said first channels (8), characterized in that said supply pipe (14) is equipped with a distributor (20; 40; 50; 60; 70; 80) of said two-phase refrigerant, this distributor comprising a plate
(21 ; 31 ; 41 ; 51 ; 61 ; 71 ; 81) pourvue de perforations(21; 31; 41; 51; 61; 71; 81) provided with perforations
(24 ; 34 ; 44 ; 54 ; 64 ; 74 ; 84) , ladite plaque perforée étant interposée sur le trajet d'écoulement dudit fluide réfrigérant diphasique. (24; 34; 44; 54; 64; 74; 84), said perforated plate being interposed on the flow path of said two-phase refrigerant.
2. Echangeur selon la revendication 1, caractérisé en ce que la plaque perforée (31 ; 41 ; 51 ; 61 ; 71 ; 81) comprend une calotte bombée (32 ; 42 ; 52 ; 62 ; 72 ; 82) , dont la concavité est tournée vers l'amont, selon la direction d'écoulement du fluide réfrigérant diphasique. 2. Exchanger according to claim 1, characterized in that the perforated plate (31; 41; 51; 61; 71; 81) comprises a domed cap (32; 42; 52; 62; 72; 82), whose concavity is turned upstream, in the direction of flow of the two-phase refrigerant.
3. Echangeur selon la revendication 2, caractérisé en ce que la calotte bombée (32 ; 42 ; 52 ; 62 ; 72 ; 82) est sphérique .3. Exchanger according to claim 2, characterized in that the domed cap (32; 42; 52; 62; 72; 82) is spherical.
4. Echangeur selon l'une des revendications précédentes, caractérisé en ce que ledit distributeur (40 ; 50 ; 60 ; 70 ; 80) est pourvu de moyens (45 ; 55 ; 65 ; 75 ; 85) d'augmentation de la vitesse d'écoulement du fluide, disposés immédiatement en amont de ladite plaque (41 ; 51 ; 61 ; 71 ; 81) .4. Exchanger according to one of the preceding claims, characterized in that said distributor (40; 50; 60; 70; 80) is provided with means (45; 55; 65; 75; 85) for increasing the speed d 'fluid flow, arranged immediately upstream of said plate (41; 51; 61; 71; 81).
5. Echangeur selon la revendication 4, caractérisé en ce que les moyens d'augmentation de la vitesse d'écoulement du fluide comprennent une partie centrale pleine (45) de la plaque (41) , autour de laquelle sont ménagées les perforations (44) . 5. Exchanger according to claim 4, characterized in that the means for increasing the flow speed of the fluid comprise a solid central part (45) of the plate (41), around which the perforations are formed (44) .
6. Echangeur selon la revendication 4, caractérisé en ce que les moyens d'augmentation de la vitesse d'écoulement du fluide comprennent un organe rapporté (55 ; 65 ; 75 ; 85) , solidaire de la plaque (51 ; 61 ; 71 ; 81) . 6. Exchanger according to claim 4, characterized in that the means for increasing the speed of flow of the fluid comprise an attached member (55; 65; 75; 85), integral with the plate (51; 61; 71; 81).
7. Echangeur selon la revendication 6, caractérisé en ce que ledit organe rapporté esc une pastille (55) disposée au centre de la plaque (51) .7. Exchanger according to claim 6, characterized in that said insert member esc a pellet (55) disposed in the center of the plate (51).
8. Echangeur selon la revendication 6, caractérisé en ce que ledit organe rapporté est un corps conique (65) dont la base (65') est adjacente à ladite plaque (61) .8. Exchanger according to claim 6, characterized in that said added member is a conical body (65) whose base (65 ') is adjacent to said plate (61).
9. Echangeur selon la revendication 8, caractérisé en ce que le corps conique (65) est pourvu, sur sa surface extérieure, de rainures longitudinales.9. Exchanger according to claim 8, characterized in that the conical body (65) is provided, on its outer surface, with longitudinal grooves.
10. Echangeur selon la revendication 6, caractérisé en ce que ledit organe rapporté est une bille (75) .10. Exchanger according to claim 6, characterized in that said added member is a ball (75).
11. Echangeur selon la revendication 6, caractérisé en ce que ledit organe rapporté (85) est formé d'une portion cylindrique (85') adjacente à la plaque (81) et d'une extrémité conique (85") prolongeant la portion cylindrique (85') vers l'amont.11. Exchanger according to claim 6, characterized in that said added member (85) is formed of a cylindrical portion (85 ') adjacent to the plate (81) and of a conical end (85 ") extending the cylindrical portion (85 ') upstream.
12. Echangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que le distributeur (20 ; 30 ; 40 ; 50 ; 60 ; 70 ; 80) prend appui contre un épaulement (16) de ladite canalisation (14) , ledit épaulement (16) formant butée pour un raccord (18) d'admission du fluide réfrigérant diphasique .12. Exchanger according to any one of the preceding claims, characterized in that the distributor (20; 30; 40; 50; 60; 70; 80) bears against a shoulder (16) of said pipe (14), said shoulder (16) forming a stop for a connection (18) for admitting the two-phase refrigerant.
13. Echangeur selon la revendication 12, caractérisé en ce que ladite plaque (21 ; 31 ; 41 ; 51 ; 61 ; 71 ; 81) comprend une bordure (26 ; 36 ; 46 ; 56 ; 66 ; 76 ; 86) périphérique plane, d'appui contre ledit épaulement (16) . 13. Exchanger according to claim 12, characterized in that said plate (21; 31; 41; 51; 61; 71; 81) comprises a border (26; 36; 46; 56; 66; 76; 86) planar peripheral, of support against said shoulder (16).
PCT/FR2001/000662 2000-03-07 2001-03-06 Plate exchanger WO2001067009A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60122867T DE60122867T2 (en) 2000-03-07 2001-03-06 Plate heat exchanger
AU2001239340A AU2001239340A1 (en) 2000-03-07 2001-03-06 Plate exchanger
EP01913933A EP1261829B1 (en) 2000-03-07 2001-03-06 Plate exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0002922A FR2806156B1 (en) 2000-03-07 2000-03-07 PLATE HEAT EXCHANGER
FR00/02922 2000-03-07

Publications (1)

Publication Number Publication Date
WO2001067009A1 true WO2001067009A1 (en) 2001-09-13

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ID=8847818

Family Applications (1)

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PCT/FR2001/000662 WO2001067009A1 (en) 2000-03-07 2001-03-06 Plate exchanger

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Country Link
EP (1) EP1261829B1 (en)
AT (1) ATE338926T1 (en)
AU (1) AU2001239340A1 (en)
DE (1) DE60122867T2 (en)
DK (1) DK1261829T3 (en)
ES (1) ES2267730T3 (en)
FR (1) FR2806156B1 (en)
WO (1) WO2001067009A1 (en)

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DE60122867T2 (en) 2007-02-01
DE60122867D1 (en) 2006-10-19
ATE338926T1 (en) 2006-09-15
ES2267730T3 (en) 2007-03-16
AU2001239340A1 (en) 2001-09-17
DK1261829T3 (en) 2007-01-08
FR2806156B1 (en) 2002-05-31
EP1261829B1 (en) 2006-09-06
FR2806156A1 (en) 2001-09-14
EP1261829A1 (en) 2002-12-04

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