WO2008081093A2 - Device for suction gas distribution in a parallel compressor assembly, and parallel compressor assembly - Google Patents
Device for suction gas distribution in a parallel compressor assembly, and parallel compressor assembly Download PDFInfo
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- WO2008081093A2 WO2008081093A2 PCT/FR2007/001952 FR2007001952W WO2008081093A2 WO 2008081093 A2 WO2008081093 A2 WO 2008081093A2 FR 2007001952 W FR2007001952 W FR 2007001952W WO 2008081093 A2 WO2008081093 A2 WO 2008081093A2
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- Prior art keywords
- tube
- compressors
- dispensing
- distribution
- suction gas
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Classifications
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- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
- F25B41/45—Arrangements for diverging or converging flows, e.g. branch lines or junctions for flow control on the upstream side of the diverging point, e.g. with spiral structure for generating turbulence
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
Definitions
- Suction gas distribution device for mounting compressors in parallel, and mounting compressors in parallel
- the present invention relates to a suction gas distribution device for mounting compressors in parallel, and a mounting of compressors in parallel.
- a compressor assembly in parallel comprises in known manner:
- At least two refrigeration compressors each comprising a body defining an interior volume, at least one oil level equalization tube putting into communication the oil pans fitted into the body of the compressors,
- At least one suction gas distribution device comprising a substantially straight distribution tube and bypass tubes communicating the distribution tube with the internal volume of the body of the compressors.
- the entry conditions speed, pressure , density
- the assembly is integrated in a reversible heat pump system
- the flow direction of the gas is reversed through an inverting valve when the system switches from cold mode to hot mode, and respectively. This change of direction of the gas flow greatly modifies the velocity profile of the gas entering the assembly.
- an assembly which makes it possible to obtain a good balancing of the oil levels in each compressor in the laboratory, can cause significant modifications of the oil levels when it is integrated on site in a machine because of the distortions imposed on the profile. suction gas velocities by the geometrical characteristics of the pipes located upstream of the assembly or by the conditions of use of the assembly. It should be noted that significant changes in oil levels may result in wear, and damage to one or more compressors due to seizure due to lack of oil.
- suction gas entering the assembly is loaded with oil particles from the compressor discharge gases. These oil particles return to the assembly, and more particularly to the oil sump of the various compressors, because of the high speeds of the gas flow in the pipes connecting the discharge tubes of the compressors to the gas distribution device. suction.
- the oil particles are preferentially directed to certain compressors called "oil recovery" compressors. Consequently, if the speed profiles at the input of the assembly and therefore at the input of the compressors vary according to the customer or the application, then the reclaiming compressors will no longer be the same and, once again, the qualification of the assembly in the laboratory may be questioning.
- the present invention therefore aims to remedy these drawbacks.
- the technical problem underlying the invention is therefore to provide a suction gas distribution device for obtaining a balancing of the oil levels in each compressor regardless of the operating conditions of the assembly.
- the invention relates to a suction gas distribution device for parallel mounting of compressors comprising at least two refrigeration compressors, each comprising a body delimiting an internal volume, the suction gas distribution device. comprising a distribution tube as well as bypass tubes placing the distribution tube in communication with the internal volume of the compressor body, characterized in that a device for normalizing the flow of the suction gas is arranged in the tube distribution upstream of the branch tubes.
- the device for normalizing the flow of the suction gas makes it possible to standardize the flow of the suction gas entering the assembly.
- the profile of the speeds of the suction gas entering the assembly will always be substantially identical.
- the suction gas distribution device according to the invention makes it possible to predetermine which compressors will be oil recoverers in all cases of application.
- the normalization device creates a pressure drop that is negligible in standard operation, that is to say during the suction of gas, but which becomes predominant in liquid flow.
- the pressure drop generated by the normalizing device will vaporize the liquid, which is always close to its saturation curve, and thus to slow down the arrival of liquid refrigerant at the suction of the compressors.
- the standardization device thus makes it possible to protect the various compressors against an abnormal arrival of liquid at the suction connectors of the compressors and to prevent any mechanical or electrical damage to the parts inside the compressor which may possibly result therefrom.
- the presence of the standardization device makes it possible to reduce the cost and the qualification time of the assembly in the laboratory.
- the normalization device comprises means for reducing the flow section of the suction gas in the distribution tube.
- the reduction means are arranged to reduce the flow section of the suction gas centrally with respect to the axis of the dispensing tube.
- the reduction means comprise a ring fixed in the dispensing tube, for example by brazing or crimping, the ring comprising a longitudinal through orifice.
- the orifice of the ring is centered relative to the axis of the dispensing tube.
- the reduction means consist of an inward deformation of the wall of the distribution tube.
- the deformation of the wall of the distribution tube comprises a first convergent frustoconical portion and a second divergent frustoconical portion.
- the deformation of the wall of the distribution tube comprises a third cylindrical portion interposed between the first and second frustoconical portions.
- the deformation of the wall of the distribution tube has a curved profile inwardly.
- the present invention also relates to a parallel compressor assembly comprising:
- At least two refrigeration compressors each comprising a body defining an interior volume, at least one oil level equalization tube putting into communication the oil pans fitted into the body of the compressors,
- At least one gas distribution device according to the invention.
- Figure 1 is a general view of an assembly of two compressors in parallel using the dispensing device according to the invention.
- Figure 2 is an enlarged sectional view of a normalizing device.
- Figure 3 is a sectional view of a first embodiment of the normalizing device.
- Figure 4 is a sectional view of a second embodiment of the normalizing device.
- Figure 1 depicts a "left" version of a parallel compressor assembly comprising:
- a suction gas distribution device 5 comprising a substantially straight distribution tube 6 and bypass tubes 7 each communicating the distribution tube 6 with the internal volume of the body of a compressor 2. It should be noted that in “right” version, the assembly would include a distribution tube 6 'as shown in Figure 1 in dashed lines.
- a device 11 for normalizing the flow of the suction gas is arranged in the distribution tube 6 upstream of the bypass tubes 7.
- the normalizing device 11 is arranged more precisely in a straight portion 12 of the distribution tube.
- the flow of the suction gas upstream and downstream of the normalizing device 11 is represented by a succession of parallel arrows in FIG. 2.
- the normalization device 11 comprises means for reducing the flow section of the gas. suction in the dispensing tube. These reduction means are arranged to reduce the flow section of the suction gas centrally relative to the axis of the distribution tube.
- the reduction means comprise an annular ring 14 fixed in the dispensing tube, for example by brazing or crimping, the orifice delimited by the annular ring being centered with respect to the axis of the straight portion. 12 of the distribution tube. It should be noted that the outer diameter of the annular ring 14 corresponding to the inner diameter of the straight portion 12.
- the reduction means are constituted by an inward deformation 16 of the wall of the distribution tube 6.
- the deformation of the wall of the distribution tube has a curved profile inwards.
- the deformation of the wall of the distribution tube comprises a first convergent frustoconical portion 17, a second divergent frustoconical portion 18, and a third cylindrical portion 19 of smaller diameter than initial diameter of the distribution tube and interposed between the first and second frustoconical portions.
- the invention is not limited to the embodiments of this dispensing device, described above as examples, it encompasses all variants.
- the number of compressors could be different without departing from the scope of the invention.
- the orifice of the ring 14 could be off-center with respect to the axis of the dispensing tube in order to straighten the flow in a bend.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Dispositif de distribution de gaz d'aspiration pour un montage de compresseurs en parallèle, et montage de compresseurs en parallèle Suction gas distribution device for mounting compressors in parallel, and mounting compressors in parallel
La présente invention concerne un dispositif de distribution de gaz d'aspiration pour un montage de compresseurs en parallèle, et un montage de compresseurs en parallèle.The present invention relates to a suction gas distribution device for mounting compressors in parallel, and a mounting of compressors in parallel.
Un montage de compresseurs en parallèle comporte de façon connue :A compressor assembly in parallel comprises in known manner:
- au moins deux compresseurs de réfrigération, chacun comprenant un corps délimitant un volume intérieur, - au moins un tube d'égalisation du niveau d'huile mettant en communication les carters d'huile aménagés dans le corps des compresseurs,at least two refrigeration compressors, each comprising a body defining an interior volume, at least one oil level equalization tube putting into communication the oil pans fitted into the body of the compressors,
- au moins un dispositif de distribution de gaz d'aspiration comprenant un tube de distribution sensiblement droit ainsi que des tubes de dérivation mettant en communication le tube de distribution avec le volume interne du corps des compresseurs.- At least one suction gas distribution device comprising a substantially straight distribution tube and bypass tubes communicating the distribution tube with the internal volume of the body of the compressors.
Afin d'assurer un bon fonctionnement et une bonne fiabilité de ce montage, il est nécessaire d'équilibrer les niveaux d'huile dans les carters des différents compresseurs. Cet équilibrage des niveaux d'huile est avantageusement obtenu en équilibrant les pressions régnant dans le carter de chaque compresseur et en mettant en relation ces carters via une canalisation d'égalisation.To ensure proper operation and reliability of this assembly, it is necessary to balance the oil levels in the crankcase of different compressors. This balancing of the oil levels is advantageously obtained by balancing the pressures prevailing in the casing of each compressor and by relating these casings via an equalization pipe.
L'équilibrage des pressions des carters est réalisé en réglant les pertes de charge de la tuyauterie du dispositif de distribution de gaz d'aspiration et du tube d'égalisation. Ce réglage des pertes de charge consiste donc à définir précisément en laboratoire la géométrie de la tuyauterie du dispositif de distribution de gaz d'aspiration et du tube d'égalisation de manière à obtenir un équilibrage des pressions régnant dans le carter de chaque compresseur.Equilibration of the crankcase pressures is achieved by adjusting the pressure drops of the piping of the suction gas distribution device and the equalization tube. This adjustment of the pressure drop therefore consists in precisely defining in the laboratory the geometry of the piping of the suction gas distribution device and the equalization tube so as to obtain a balancing of the pressures prevailing in the casing of each compressor.
Bien entendu, l'équilibrage des niveaux d'huile doit être obtenu quelles que soient les conditions de fonctionnement du montage.Of course, the balancing of the oil levels must be obtained regardless of the operating conditions of the assembly.
La diversité d'utilisation du montage (climatisation, pompe à chaleur, réfrigération basse température) et la diversité des géométries des tuyauteries situées en amont du montage lorsque ce dernier est intégré dans un système complexe font que les conditions d'entrée (vitesse, pression, densité) du gaz d'aspiration dans le montage peuvent être extrêmement variables. Par exemple, lorsque le montage est intégré dans un système de pompe à chaleur réversible, le sens d'écoulement du gaz est inversé par l'intermédiaire d'une vanne d'inversion lorsque le système bascule du mode froid vers le mode chaud, et respectivement. Ce changement de sens de l'écoulement du gaz modifie fortement le profil de vitesse du gaz entrant dans le montage.The diversity of use of the assembly (air conditioning, heat pump, low temperature refrigeration) and the diversity of the geometries of the pipes located upstream of the assembly when the latter is integrated in a complex system make the entry conditions (speed, pressure , density) of the suction gas in the mounting can be extremely variable. For example, when the assembly is integrated in a reversible heat pump system, the flow direction of the gas is reversed through an inverting valve when the system switches from cold mode to hot mode, and respectively. This change of direction of the gas flow greatly modifies the velocity profile of the gas entering the assembly.
Or, puisque les pertes de charge des tuyauteries du dispositif de distribution de gaz d'aspiration et du tube d'égalisation sont liées au profil des vitesses du gaz d'aspiration entrant dans le montage, des variations importantes des conditions d'entrée du gaz d'aspiration peuvent modifier fortement le comportement du montage et de ce fait empêcher l'obtention d'un équilibrage des pressions régnant dans le carter de chaque compresseur et donc des niveaux d'huile dans les différents compresseurs.However, since the pressure drops of the piping of the suction gas distribution device and the equalization tube are related to the profile of the speeds of the suction gas entering the assembly, significant variations in the gas inlet conditions. suction can greatly alter the behavior of the assembly and thus prevent the obtaining of a balancing of the pressures in the crankcase of each compressor and thus the oil levels in the various compressors.
Ainsi, un montage qui permet d'obtenir un bon équilibrage des niveaux d'huile dans chaque compresseur en laboratoire, peut engendrer des modifications importantes des niveaux d'huile lorsqu'il est intégré sur site dans une machine du fait des distorsions imposées au profil des vitesses du gaz d'aspiration par les particularités géométriques des tuyauteries situées en amont du montage ou par les conditions d'utilisation du montage. II doit être noté que des modifications importantes des niveaux d'huile peuvent entraîner l'usure., et l'endommagement d'un ou plusieurs compresseurs par grippage consécutif à un manque d'huile.Thus, an assembly which makes it possible to obtain a good balancing of the oil levels in each compressor in the laboratory, can cause significant modifications of the oil levels when it is integrated on site in a machine because of the distortions imposed on the profile. suction gas velocities by the geometrical characteristics of the pipes located upstream of the assembly or by the conditions of use of the assembly. It should be noted that significant changes in oil levels may result in wear, and damage to one or more compressors due to seizure due to lack of oil.
Il en résulte qu'une qualification longue et coûteuse d'un montage en laboratoire peut être potentiellement remise en cause lorsque le montage est implanté sur certaines machines.As a result, a long and costly qualification of a laboratory assembly can potentially be called into question when the assembly is installed on certain machines.
Il doit être précisé que le gaz d'aspiration entrant dans le montage est chargé en particules d'huile provenant des gaz de refoulement des compresseurs. Ces particules d'huile reviennent dans le montage, et plus particulièrement dans les carters d'huile des différents compresseurs, du fait des vitesses élevées de l'écoulement de gaz dans les tuyauteries reliant les tubes de refoulement des compresseurs au dispositif de distribution de gaz d'aspiration.It should be noted that the suction gas entering the assembly is loaded with oil particles from the compressor discharge gases. These oil particles return to the assembly, and more particularly to the oil sump of the various compressors, because of the high speeds of the gas flow in the pipes connecting the discharge tubes of the compressors to the gas distribution device. suction.
Compte tenu des singularités de la tuyauterie du dispositif de distribution de gaz d'aspiration définies en laboratoire, les particules d'huile sont préférentiellement dirigées vers certains compresseurs appelés compresseurs « récupérateurs » d'huile. En conséquence, si les profils de vitesse en entrée du montage et donc en entrée des compresseurs varient selon le client ou l'application, alors les compresseurs récupérateurs ne seront plus les mêmes et, une fois encore, la qualification du montage en laboratoire pourra être remise en cause. La présente invention vise donc à remédier à ces inconvénients.Given the singularities of the piping of the suction gas distribution device defined in the laboratory, the oil particles are preferentially directed to certain compressors called "oil recovery" compressors. Consequently, if the speed profiles at the input of the assembly and therefore at the input of the compressors vary according to the customer or the application, then the reclaiming compressors will no longer be the same and, once again, the qualification of the assembly in the laboratory may be questioning. The present invention therefore aims to remedy these drawbacks.
Le problème technique à la base de l'invention consiste donc à fournir un dispositif de distribution de gaz d'aspiration permettant d'obtenir un équilibrage des niveaux d'huile dans chaque compresseur quelles que soient les conditions de fonctionnement du montage. A cet effet, l'invention concerne un dispositif de distribution de gaz d'aspiration pour un montage de compresseurs en parallèle comprenant au moins deux compresseurs de réfrigération, chacun comprenant un corps délimitant un volume intérieur, le dispositif de distribution de gaz d'aspiration comprenant un tube de distribution ainsi que des tubes de dérivation mettant en communication le tube de distribution avec le volume interne du corps des compresseurs, caractérisé en ce qu'un dispositif de normalisation de l'écoulement du gaz d'aspiration est disposé dans le tube de distribution en amont des tubes de dérivation.The technical problem underlying the invention is therefore to provide a suction gas distribution device for obtaining a balancing of the oil levels in each compressor regardless of the operating conditions of the assembly. For this purpose, the invention relates to a suction gas distribution device for parallel mounting of compressors comprising at least two refrigeration compressors, each comprising a body delimiting an internal volume, the suction gas distribution device. comprising a distribution tube as well as bypass tubes placing the distribution tube in communication with the internal volume of the compressor body, characterized in that a device for normalizing the flow of the suction gas is arranged in the tube distribution upstream of the branch tubes.
Le dispositif de normalisation de l'écoulement du gaz d'aspiration permet de normaliser l'écoulement du gaz d'aspiration entrant dans le montage. Ainsi, quelle que soit la géométrie des tuyauteries situées en amont du montage, le profil des vitesses du gaz d'aspiration entrant dans le montage sera toujours sensiblement identique.The device for normalizing the flow of the suction gas makes it possible to standardize the flow of the suction gas entering the assembly. Thus, whatever the geometry of the pipes located upstream of the assembly, the profile of the speeds of the suction gas entering the assembly will always be substantially identical.
De ce fait, un montage qui permet d'obtenir un bon équilibrage des niveaux d'huile dans chaque compresseur en laboratoire, permettra également d'obtenir un bon équilibrage des niveaux d'huile dans chaque compresseur sur site.As a result, an assembly that provides a good balance of oil levels in each compressor in the laboratory, will also achieve a good balance of oil levels in each compressor on site.
En outre, par la normalisation du profil de vitesses du gaz en entrée du montage, le dispositif de distribution de gaz d'aspiration selon l'invention permet de prédéterminer quels compresseurs seront récupérateurs d'huile dans tous les cas d'application.In addition, by standardizing the gas velocity profile at the inlet of the assembly, the suction gas distribution device according to the invention makes it possible to predetermine which compressors will be oil recoverers in all cases of application.
Il doit être noté que le dispositif de normalisation crée une perte de charge qui est négligeable en fonctionnement standard, c'est-à-dire lors de l'aspiration de gaz, mais qui devient prépondérante en écoulement liquide. Ainsi, si un bouchon liquide se forme dans le tube de distribution et atteint le dispositif de normalisation, la perte de charge engendrée par le dispositif de normalisation permettra de vaporiser le liquide, qui est toujours proche de sa courbe de saturation, et donc de freiner l'arrivée de fluide frigorigène liquide à l'aspiration des compresseurs.It should be noted that the normalization device creates a pressure drop that is negligible in standard operation, that is to say during the suction of gas, but which becomes predominant in liquid flow. Thus, if a liquid plug is formed in the distribution tube and reaches the normalization device, the pressure drop generated by the normalizing device will vaporize the liquid, which is always close to its saturation curve, and thus to slow down the arrival of liquid refrigerant at the suction of the compressors.
Le dispositif de normalisation permet donc de protéger les différents compresseurs contre une arrivée anormale de liquide aux connecteurs d'aspiration des compresseurs et prévenir les dommages mécaniques ou électriques des pièces internes au compresseur qui peuvent éventuellement en résulter.The standardization device thus makes it possible to protect the various compressors against an abnormal arrival of liquid at the suction connectors of the compressors and to prevent any mechanical or electrical damage to the parts inside the compressor which may possibly result therefrom.
En conséquence, la présence du dispositif de normalisation permet d'assurer une plus grande fiabilité des compresseurs.Consequently, the presence of the normalization device makes it possible to ensure greater reliability of the compressors.
En outre, la présence du dispositif de normalisation permet de réduire le coût et le temps de qualification du montage en laboratoire.In addition, the presence of the standardization device makes it possible to reduce the cost and the qualification time of the assembly in the laboratory.
En effet, dans ce cas, il n'est plus nécessaire de qualifier des versions « droite » et « gauche » du montage puisque le dispositif de normalisation supprime les différences d'écoulement du gaz entre ces deux versions. La version « droite » ou « gauche » du montage correspond à une arrivée de gaz par la droite ou la gauche du montage.Indeed, in this case, it is no longer necessary to qualify the "right" and "left" versions of the assembly since the normalization device eliminates gas flow differences between these two versions. The "right" or "left" version of the assembly corresponds to a gas supply to the right or left of the assembly.
Avantageusement, le dispositif de normalisation comprend des moyens de réduction de la section d'écoulement du gaz d'aspiration dans le tube de distribution.Advantageously, the normalization device comprises means for reducing the flow section of the suction gas in the distribution tube.
__ _. De préférence, les moyens de réduction.sont agencés pour réduire la section d'écoulement du gaz d'aspiration de manière centrée par rapport à l'axe du tube de distribution.__ _. Preferably, the reduction means are arranged to reduce the flow section of the suction gas centrally with respect to the axis of the dispensing tube.
Selon une première alternative de l'invention, les moyens de réduction comprennent une bague fixée dans le tube de distribution, par exemple par brasage ou sertissage, la bague comportant un orifice longitudinal traversant.According to a first alternative of the invention, the reduction means comprise a ring fixed in the dispensing tube, for example by brazing or crimping, the ring comprising a longitudinal through orifice.
De préférence, l'orifice de la bague est centré par rapport à l'axe du tube de distribution. Selon une seconde alternative de l'invention, les moyens de réduction sont constitués par une déformation vers l'intérieur de la paroi du tube de distribution.Preferably, the orifice of the ring is centered relative to the axis of the dispensing tube. According to a second alternative of the invention, the reduction means consist of an inward deformation of the wall of the distribution tube.
Avantageusement, la déformation de la paroi du tube de distribution comprend une première portion tronconique convergente et une seconde portion tronconique divergente. De préférence, la déformation de la paroi du tube de distribution comprend une troisième portion cylindrique intercalée entre les première et seconde portions tronconiques.Advantageously, the deformation of the wall of the distribution tube comprises a first convergent frustoconical portion and a second divergent frustoconical portion. Preferably, the deformation of the wall of the distribution tube comprises a third cylindrical portion interposed between the first and second frustoconical portions.
Selon une autre alternative de l'invention, la déformation de la paroi du tube de distribution présente un profil bombé vers l'intérieur.According to another alternative of the invention, the deformation of the wall of the distribution tube has a curved profile inwardly.
La présente invention concerne également un montage de compresseurs en parallèle comprenant :The present invention also relates to a parallel compressor assembly comprising:
- au moins deux compresseurs de réfrigération, chacun comprenant un corps délimitant un volume intérieur, - au moins un tube d'égalisation du niveau d'huile mettant en communication les carters d'huile aménagés dans le corps des compresseurs,at least two refrigeration compressors, each comprising a body defining an interior volume, at least one oil level equalization tube putting into communication the oil pans fitted into the body of the compressors,
- au moins un dispositif de distribution de gaz selon l'invention.at least one gas distribution device according to the invention.
De toute façon l'invention sera bien comprise à l'aide de la description qui suit en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, plusieurs formes d'exécution de ce dispositif de distribution.In any case the invention will be better understood with the aid of the description which follows with reference to the appended schematic drawing showing, by way of non-limiting examples, several embodiments of this dispensing device.
La figure 1 est une vue générale d'un montage de deux compresseurs en parallèle utilisant le dispositif de distribution selon l'invention. La figure 2 est une vue en coupe et à l'échelle agrandie d'un dispositif de normalisation.Figure 1 is a general view of an assembly of two compressors in parallel using the dispensing device according to the invention. Figure 2 is an enlarged sectional view of a normalizing device.
La figure 3 est une vue en coupe d'une première variante de réalisation du dispositif de normalisation.Figure 3 is a sectional view of a first embodiment of the normalizing device.
La figure 4 est une vue en coupe d'une seconde variante de réalisation du dispositif de normalisation. La figure 1 décrit une version « gauche » d'un montage de compresseurs en parallèle comprenant :Figure 4 is a sectional view of a second embodiment of the normalizing device. Figure 1 depicts a "left" version of a parallel compressor assembly comprising:
- deux compresseurs 2 de réfrigération, chacun comprenant un corps 3 délimitant un volume intérieur,two refrigeration compressors 2, each comprising a body 3 defining an interior volume,
- un tube d'égalisation 4 du niveau d'huile mettant en communication les carters d'huile aménagés dans le corps 3 des compresseurs 2,an oil level equalization tube 4 putting into communication the oil sump housings provided in the body 3 of the compressors 2,
- un dispositif de distribution du gaz d'aspiration 5 comprenant un tube de distribution 6 sensiblement droit ainsi que des tubes de dérivation 7 mettant chacun en communication le tube de distribution 6 avec le volume interne du corps d'un compresseur 2. II doit être noté qu'en version « droite », le montage comporterait un tube de distribution 6' tel que représenté sur la figure 1 en pointillés.- A suction gas distribution device 5 comprising a substantially straight distribution tube 6 and bypass tubes 7 each communicating the distribution tube 6 with the internal volume of the body of a compressor 2. It should be noted that in "right" version, the assembly would include a distribution tube 6 'as shown in Figure 1 in dashed lines.
Un dispositif de normalisation 11 de l'écoulement du gaz d'aspiration est disposé dans le tube de distribution 6 en amont des tubes de dérivation 7. Le dispositif de normalisation 11 est disposé plus précisément dans une portion droite 12 du tube de distribution.A device 11 for normalizing the flow of the suction gas is arranged in the distribution tube 6 upstream of the bypass tubes 7. The normalizing device 11 is arranged more precisely in a straight portion 12 of the distribution tube.
L'écoulement du gaz d'aspiration en amont et en aval du dispositif de normalisation 11 est représenté par une succession de flèches parallèles sur la figure 2. Le dispositif de normalisation 11 comprend des moyens de réduction de la section d'écoulement du gaz d'aspiration dans le tube de distribution. Ces moyens de réduction sont agencés pour réduire la section d'écoulement du gaz d'aspiration de manière centrée par rapport à l'axe du tube de distribution. Comme montré à la figure 2, les moyens de réduction comprennent une bague annulaire 14 fixée dans le tube de distribution par exemple par brasage ou sertissage, l'orifice 15 délimité par la bague annulaire étant centré par rapport à l'axe de la portion droite 12 du tube de distribution. Il doit être noté que le diamètre extérieur de la bague annulaire 14 correspondant au diamètre intérieur de la portion droite 12.The flow of the suction gas upstream and downstream of the normalizing device 11 is represented by a succession of parallel arrows in FIG. 2. The normalization device 11 comprises means for reducing the flow section of the gas. suction in the dispensing tube. These reduction means are arranged to reduce the flow section of the suction gas centrally relative to the axis of the distribution tube. As shown in FIG. 2, the reduction means comprise an annular ring 14 fixed in the dispensing tube, for example by brazing or crimping, the orifice delimited by the annular ring being centered with respect to the axis of the straight portion. 12 of the distribution tube. It should be noted that the outer diameter of the annular ring 14 corresponding to the inner diameter of the straight portion 12.
Selon _Λine première variante de réalisation du dispositif de normalisation montrée à la figure 3, les moyens de réduction sont constitués par une déformation vers l'intérieur 16 de la paroi du tube de distribution 6. La déformation de la paroi du tube de distribution présente un profil bombé vers l'intérieur.According to _Λine first alternative embodiment of the normalization device shown in Figure 3, the reduction means are constituted by an inward deformation 16 of the wall of the distribution tube 6. The deformation of the wall of the distribution tube has a curved profile inwards.
Selon une seconde variante de réalisation du dispositif de normalisation montrée à la figure 4, la déformation de la paroi du tube de distribution comprend une première portion tronconique convergente 17, une seconde portion tronconique divergente 18, et une troisième portion cylindrique 19 de diamètre inférieur au diamètre initial du tube de distribution et intercalée entre les première et seconde portions tronconiques.According to a second variant embodiment of the normalization device shown in FIG. 4, the deformation of the wall of the distribution tube comprises a first convergent frustoconical portion 17, a second divergent frustoconical portion 18, and a third cylindrical portion 19 of smaller diameter than initial diameter of the distribution tube and interposed between the first and second frustoconical portions.
Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de ce dispositif de distribution, décrites ci-dessus à titre d'exemples, elle en embrasse au contraire toutes les variantes de réalisation. C'est ainsi notamment que le nombre de compresseurs pourrait être différent sans que l'on sorte pour autant du cadre de l'invention. De même, l'orifice de la bague 14 pourrait être décentré par rapport à l'axe du tube de distribution afin de redresser l'écoulement dans un coude. As goes without saying, the invention is not limited to the embodiments of this dispensing device, described above as examples, it encompasses all variants. Thus, in particular, the number of compressors could be different without departing from the scope of the invention. Similarly, the orifice of the ring 14 could be off-center with respect to the axis of the dispensing tube in order to straighten the flow in a bend.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007800504938A CN101627266B (en) | 2006-12-04 | 2007-11-28 | Device for suction gas distribution in a parallel compressor assembly, and parallel compressor assembly |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0610569A FR2909421B1 (en) | 2006-12-04 | 2006-12-04 | SUCTION GAS DISTRIBUTION DEVICE FOR MOUNTING COMPRESSORS IN PARALLEL, AND MOUNTING COMPRESSORS IN PARALLEL |
| FR0610569 | 2006-12-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008081093A2 true WO2008081093A2 (en) | 2008-07-10 |
| WO2008081093A3 WO2008081093A3 (en) | 2008-10-02 |
Family
ID=38197618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2007/001952 Ceased WO2008081093A2 (en) | 2006-12-04 | 2007-11-28 | Device for suction gas distribution in a parallel compressor assembly, and parallel compressor assembly |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101627266B (en) |
| FR (1) | FR2909421B1 (en) |
| WO (1) | WO2008081093A2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014022295A1 (en) | 2012-07-31 | 2014-02-06 | Bitzer Kuehlmaschinenbau Gmbh | Method of active oil management for multiple scroll compressors |
| WO2014022198A1 (en) | 2012-07-31 | 2014-02-06 | Bitzer Kühlmaschinenbau Gmbh | Suction header arrangement for oil management in multiple-compressor systems |
| WO2014022289A1 (en) | 2012-07-31 | 2014-02-06 | Bitzer Kuehlmaschinenbau Gmbh | Oil equalization configuration for multiple compressor systems containing three or more compressors |
| WO2014134336A1 (en) | 2013-02-28 | 2014-09-04 | Bitzer Kühlmaschinenbau Gmbh | Apparatus and method for oil equalization in multiple-compressor systems |
| WO2017127241A1 (en) | 2016-01-22 | 2017-07-27 | Bitzer Kuehlmaschinenbau Gmbh | Oil distribution in multiple-compressor systems utilizing variable speed |
| CN107503918A (en) * | 2017-09-19 | 2017-12-22 | 广东志高暖通设备股份有限公司 | A kind of parallel connection compressor and air-conditioning system |
| US9939179B2 (en) | 2015-12-08 | 2018-04-10 | Bitzer Kuehlmaschinenbau Gmbh | Cascading oil distribution system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369401A (en) * | 2009-05-29 | 2012-03-07 | 松下电器产业株式会社 | Refrigeration cycle apparatus |
| FR2966569B1 (en) * | 2010-10-26 | 2012-10-26 | Danfoss Commercial Compressors | REFRIGERATION SYSTEM |
| CN105466082B (en) * | 2014-08-21 | 2019-09-20 | 浙江盾安机电科技有限公司 | A kind of parallel connection compressor oil balancing unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3360958A (en) * | 1966-01-21 | 1968-01-02 | Trane Co | Multiple compressor lubrication apparatus |
| JPH0829018A (en) * | 1994-07-14 | 1996-02-02 | Hitachi Ltd | Refrigerant flow divider |
| JP3376534B2 (en) * | 1994-08-18 | 2003-02-10 | 株式会社日立製作所 | Refrigerant distributor |
| WO2001006181A1 (en) * | 1999-07-21 | 2001-01-25 | Daikin Industries, Ltd. | Refrigerating device |
| US6983622B2 (en) * | 2004-04-20 | 2006-01-10 | Danfoss Commercial Compressors | Gas distribution device |
-
2006
- 2006-12-04 FR FR0610569A patent/FR2909421B1/en not_active Expired - Fee Related
-
2007
- 2007-11-28 WO PCT/FR2007/001952 patent/WO2008081093A2/en not_active Ceased
- 2007-11-28 CN CN2007800504938A patent/CN101627266B/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10495089B2 (en) | 2012-07-31 | 2019-12-03 | Bitzer Kuehlmashinenbau GmbH | Oil equalization configuration for multiple compressor systems containing three or more compressors |
| WO2014022198A1 (en) | 2012-07-31 | 2014-02-06 | Bitzer Kühlmaschinenbau Gmbh | Suction header arrangement for oil management in multiple-compressor systems |
| WO2014022289A1 (en) | 2012-07-31 | 2014-02-06 | Bitzer Kuehlmaschinenbau Gmbh | Oil equalization configuration for multiple compressor systems containing three or more compressors |
| WO2014022295A1 (en) | 2012-07-31 | 2014-02-06 | Bitzer Kuehlmaschinenbau Gmbh | Method of active oil management for multiple scroll compressors |
| CN104641116A (en) * | 2012-07-31 | 2015-05-20 | 比策尔制冷机械制造有限公司 | Suction Head Units for Oil Management in Multiple Compressor Systems |
| US10634137B2 (en) | 2012-07-31 | 2020-04-28 | Bitzer Kuehlmaschinenbau Gmbh | Suction header arrangement for oil management in multiple-compressor systems |
| US9689386B2 (en) | 2012-07-31 | 2017-06-27 | Bitzer Kuehlmaschinenbau Gmbh | Method of active oil management for multiple scroll compressors |
| US10612549B2 (en) | 2012-07-31 | 2020-04-07 | Bitzer Kuehlmaschinenbau Gmbh | Oil equalization configuration for multiple compressor systems containing three or more compressors |
| WO2014134336A1 (en) | 2013-02-28 | 2014-09-04 | Bitzer Kühlmaschinenbau Gmbh | Apparatus and method for oil equalization in multiple-compressor systems |
| EP3587818A1 (en) | 2013-02-28 | 2020-01-01 | BITZER Kühlmaschinenbau GmbH | Apparatus and method for oil equalization in multiple-compressor systems |
| US9051934B2 (en) | 2013-02-28 | 2015-06-09 | Bitzer Kuehlmaschinenbau Gmbh | Apparatus and method for oil equalization in multiple-compressor systems |
| US9939179B2 (en) | 2015-12-08 | 2018-04-10 | Bitzer Kuehlmaschinenbau Gmbh | Cascading oil distribution system |
| WO2017127241A1 (en) | 2016-01-22 | 2017-07-27 | Bitzer Kuehlmaschinenbau Gmbh | Oil distribution in multiple-compressor systems utilizing variable speed |
| US10760831B2 (en) | 2016-01-22 | 2020-09-01 | Bitzer Kuehlmaschinenbau Gmbh | Oil distribution in multiple-compressor systems utilizing variable speed |
| CN107503918A (en) * | 2017-09-19 | 2017-12-22 | 广东志高暖通设备股份有限公司 | A kind of parallel connection compressor and air-conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2909421B1 (en) | 2009-01-16 |
| WO2008081093A3 (en) | 2008-10-02 |
| CN101627266A (en) | 2010-01-13 |
| CN101627266B (en) | 2013-06-05 |
| FR2909421A1 (en) | 2008-06-06 |
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