EP2221560B1 - Accumulator and climatisation circuit with such accumulator - Google Patents

Accumulator and climatisation circuit with such accumulator Download PDF

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Publication number
EP2221560B1
EP2221560B1 EP10153459.2A EP10153459A EP2221560B1 EP 2221560 B1 EP2221560 B1 EP 2221560B1 EP 10153459 A EP10153459 A EP 10153459A EP 2221560 B1 EP2221560 B1 EP 2221560B1
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EP
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Prior art keywords
reservoir
accumulator
pipe
internal section
lubricant
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EP10153459.2A
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German (de)
French (fr)
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EP2221560A1 (en
Inventor
Jugurtha Benouali
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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Priority to PL10153459T priority Critical patent/PL2221560T3/en
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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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

  • the invention relates to air conditioning circuits, particularly for motor vehicles.
  • the invention relates more particularly to an accumulator and an air conditioning circuit traversed by a refrigerant including a compressor, an evaporator and an expander and such an accumulator.
  • the refrigerant such as the compound designated "R744" (or CO 2 ), "R134a” or “HFO-1234yf"
  • R744" or CO 2
  • R134a or "HFO-1234yf”
  • the gaseous refrigerant is compressed by a compressor and then condensed in a liquid state in a condenser and then expanded in a pressure reducer. From there, he gains an evaporator where he turns into a gaseous state to win the compressor, and so on. At the exit of the evaporator, the coolant gains an accumulator before regaining the intake of the compressor.
  • the accumulator mounted between the evaporator and the compressor, separates the liquid and gaseous phases of the refrigerant fluid to prevent the liquid refrigerant from entering the compressor while allowing the gaseous refrigerant to pass.
  • the accumulator comprises a reservoir for receiving a mixture of a coolant and a lubricant and a pipe disposed inside the reservoir.
  • the mixture of refrigerant and lubricant is injected into the reservoir from the evaporator.
  • the gaseous refrigerant is then sucked into the compressor, while the remaining liquid refrigerant is deposited in the tank.
  • Lubricant used to lubricate the compressor and other parts circulates through the air conditioning system pipes with the refrigerant.
  • Lubricant is deposited in the lower part of the tank under the liquid refrigerant.
  • the pipe is provided with a lubricant recovery port thus allowing the lubricant to be recovered from the lower part of the tank. Part of the lubricant recovered in the pipe is then sucked towards the compressor as a function of the refrigerant flow rate passing through the pipe.
  • the battery In the automotive field, the battery must be able to operate in different positions of the vehicle, including when it is sloping. In this case, it is very important to ensure a level of lubricant in the air conditioning circuit to ensure the proper operation of the compressor.
  • the volume of lubricant stored in the components of the air conditioning circuit and more particularly in the accumulator must remain limited, so that the compressor remains sufficiently supplied with lubricant.
  • the object of the present invention is therefore to provide an accumulator and an air conditioning circuit for proper operation of the components of the circuit requiring lubrication, including in an inclined position and with the minimum volume of lubricant stored in the reservoir.
  • the invention relates to an accumulator for an air conditioning circuit according to claim 1.
  • the lubricant recovery hole remains immersed in the lubricant in the inclined positions of the accumulator, so that even in inclined position, the accumulator always has a lubricant recovery capacity to continue to ensure a good circuit operation, while preserving a moderate amount of lubricant in the lower tank.
  • the invention also relates to an air conditioning circuit intended to be part of a motor vehicle to ensure the air conditioning of the passenger compartment, adapted to be traversed by a refrigerant, comprising a compressor, a condenser, a pressure reducer and an evaporator , characterized in that it comprises an accumulator as described above.
  • FIG. 1 representing an air conditioning circuit 1 intended to be part of a motor vehicle to provide air conditioning of the passenger compartment.
  • the circuit 1 is able to be traversed by a refrigerant, such as the compound designated "R744" (or CO 2 ), "R134a” or "HFO-1234yf".
  • the circuit 1 comprises a compressor 2, with fixed or variable displacement, capable of compressing the refrigerant in the gas phase from a low pressure up to high pressure.
  • the refrigerant fluid thus compressed and heated then passes through a condenser 3 capable of being swept by a flow of air to cool the refrigerant.
  • the refrigerant is sent to a pressure reducer 4 in which it passes from a high pressure to a low pressure to be cooled before gaining an evaporator 5.
  • This is suitable for being swept by a flow air that is cooled by heat exchange with the coolant to produce a cooled air flow, also called air conditioning, to be sent into the passenger compartment of the vehicle.
  • the refrigerant passes through an accumulator 6 before returning to the compressor 2.
  • the accumulator 6 comprises a reservoir 7 and a pipe 8 arranged in the reservoir 7 to collect through an inlet 8a, the phase gaseous refrigerant.
  • the pipe 8 then conveys the fluid to the inlet of the compressor 2 through an outlet 8b intended to be placed in communication with the inlet of the compressor 2 (see for example the figure 4a ).
  • the accumulator 6 serves in particular as a gas / liquid separator for maintaining a stabilized refrigerant pressure.
  • the figure 2 illustrates a second example of an air conditioning circuit 1 comprising an internal heat exchanger 9.
  • the refrigerant is sent to the internal heat exchanger 9 and then reaches the expander 4. 6, the fluid passes through the internal heat exchanger 9 before returning to the compressor 2.
  • the refrigerant circulating in the high pressure portion of the internal heat exchanger 9 , exchanging heat with the coolant cooled and at low pressure.
  • the air conditioning circuit 1 comprises an accumulator 6 having an internal heat exchanger 10, arranged for example around the pipe and integrated in the tank of the accumulator 6, so that the superheated refrigerant fluid at high pressure exchange of heat with the coolant refrigerant and low pressure included in the pipe.
  • the reservoir 7 of the accumulator 6 is delimited by a peripheral envelope 11, for example cylindrical, terminating in a bottom 12 corresponding to the lower lower end of the reservoir 7.
  • the reservoir 7 is further closed in its upper part 13 by a lid (not shown). It is also possible to provide a closure plug 14 at the bottom 12 of the accumulator 6 (see, for example, figure 6b ).
  • the lower portion 15 of the reservoir 7 is intended to contain a lubricant 17, such as oil.
  • the lubricant serves to lubricate the compressor 2 and other components of the circuit 1.
  • a lubricant recovery port 18 is provided in the pipe 8, at the lower portion 15 of the reservoir 7.
  • the diameter of the orifice 18 is for example between 0.8 and 1.4 millimeters for an OCR (ratio of the mass of lubricant to the coolant mass), which can range from 0.5% to 6%.
  • the pipe 8 has a substantially "J" -shaped bend at the lower part 15 of the tank 7, the inlet 8a of the pipe 8 opening into the upper part 13 of the tank 7, the outlet 8b being intended to be placed in communication with the intake of the compressor 2.
  • the accumulator 6 thus makes it possible to separate the liquid and gaseous phases of the refrigerant fluid by allowing the gaseous refrigerant alone to pass towards the compressor 2, via the inlet 8a.
  • the lubricant recovery orifice 18 is formed at the bend of the pipe 8, for example in a central position at its lower end, opposite the bottom 12.
  • the lubricant flows through the pipes of the air conditioning circuit. 1 with the refrigerant.
  • Part of the lubricant is deposited on the bottom of the tank 7 with the refrigerant, in liquid form 16, 17.
  • Part of the lubricant 17 recovered in the pipe 8 is sucked towards the compressor 2 as a function of the flow rate of the refrigerant passing through the pipe 8.
  • the accumulator 6 may also include a desiccant system 19 in the reservoir 9, in order to protect the various components of the air conditioning circuit 1 from moisture.
  • This desiccant system 19 comprises, for example, a bag or a desiccant salt cartridge.
  • the distance d between the center of the orifice 18 and the bottom 12 of the reservoir 7 is between one and twelve millimeters.
  • the distance d is between five and eight millimeters.
  • the inner section S of the lower part 15 of the reservoir 7 shrinks to the bottom d 12.
  • the peripheral envelope 11 of the reservoir 7 is shaped to narrow the internal section S of the lower part 15 until at the bottom 12 of the reservoir 7.
  • the shape of the lower part 15 of the peripheral envelope 11 of the reservoir 7 is then designed so that the internal section S narrows to the bottom 12, for example by molding or by thermoforming ( figure 10b ).
  • the accumulator 6 comprises a lining insert 20 disposed in the lower part 15 of the reservoir 7, shaped to narrow the internal section S of the lower portion 15 to the bottom 12.
  • the lining insert 20 can be made of plastic or metal.
  • the lower part 15 of the reservoir 7 has a shape at least partially conical or frustoconical (inverted) whose half-angle ⁇ at the top, between a vertical axis Y and a lateral face of the internal conical section, is between 45 and 75 degrees, for example of the order of 60 °.
  • the inner section S of the cone passing through a plane parallel to the base is then defined by a circle narrowing to the bottom 12 of the reservoir 7.
  • the lower portion 15 of the reservoir thus has a substantially funnel-shaped shape.
  • the angle ⁇ complementary to the half-angle ⁇ , between a lateral face of the internal section S 15 of the reservoir 7 and a horizontal plane, is thus between 15 and 45 ° (of the order of 30 ° in the example).
  • a truncated cone shape is provided, for example, to provide a plug in the disk-shaped bottom 12.
  • the bottom 12 may have a diameter of between 10 and 40 millimeters.
  • the top of a first truncated cone portion is extended at least partially by an additional frustoconical portion whose base D2 corresponds to the top of the first frustoconical portion.
  • the base D2 may have a size of between 20 and 60 millimeters.
  • the half-angle at the vertex ⁇ of the first truncated cone portion, between a vertical axis Y and a lateral face of the frustoconical internal section S, is between 45 and 75 degrees, and the bottom 12 comprises, for example, a diameter D1 between 10 and 40 millimeters.
  • the angle ⁇ complementary to the half-angle ⁇ between a lateral face of the internal section S of the reservoir 7 and a horizontal plane is thus between 15 and 45 ° (of the order of 30 ° in the example under consideration. ).
  • FIGS. 6a, 6b and 6c represent a variant in which the accumulator 6 comprises a lining insert 20 disposed in the lower portion 15 of the tank 7, an outer surface 20a of which is in the shape of the tank 7 and whose inner surface 20b is shaped to narrow the internal section S from the bottom 15 to the bottom 12.
  • a first truncated cone portion whose half-angle at the vertex ⁇ between a vertical axis Y and a lateral face of the frustoconical internal section S is between 45 and 75 degrees, extends to less partially by a spherical portion conforming to the shape of the bend of the pipe 8, extending itself by an additional frustoconical portion.
  • the spherical portion makes it possible to narrow the internal section S by partially matching the shape of the elbow so as to form a support means for the pipe 8.
  • an embodiment of the filter 21 is also visible at the orifice 18.
  • the filter 21 is fixed by two rings 22a, 22b disposed on either side of the orifice 18 at the elbow. Line 8.
  • FIGS. 7a and 7b represent another embodiment of a lining insert 20, whose outer surface 20a takes the form of a reservoir 7 and an inner surface 20b is shaped to narrow the inner section S of the lower portion 15 to the bottom 12 of the reservoir 7.
  • the top of a first portion truncated cone is extended by a spherical portion forming a support means of the pipe 8, extending by an additional frustoconical portion.
  • the lower part 15 of the reservoir 7 has a first portion in at least partially frustoconical (inverted) shape, the half-angle at the top ⁇ , between a vertical axis Y and a lateral face of the frustoconical internal section S is between 45 and 75 degrees.
  • the top D3 of this first portion is extended by a concave portion, such as a hemispherical cap.
  • the vertex D3 has a size of between 30 and 60 millimeters.
  • the pipe 8 is straight and passes through the bottom 12 of the tank 7, the inlet 8a of the pipe 8 opening towards a deflector 23 of the accumulator 6, disposed in an upper part 13 of the tank 7.
  • the lubricant recovery orifice 18 is provided at the distance d from the bottom 12 on a side wall of the pipe 8.
  • the distance d between the center of the orifice 18 and the bottom 12 of the reservoir 7 is comprised between one and twelve millimeters, for example, between five and eight millimeters.
  • the inner section S of the lower portion 15 of the reservoir 7 shrinks to the bottom 12.
  • the mixture of coolant and lubricant is injected into the tank 7 from the evaporator 5 and strikes the upper part of the deflector 23.
  • the gaseous part of the fluid is sucked into the compressor 2 via the inlet 8a of the the pipe 8, while the remaining liquid coolant is deposited in the lower portion 15 of the reservoir 7 with the lubricant.
  • the lower part 15 of the reservoir 7 has an at least partially frustoconical shape whose half-angle at the vertex ⁇ , between a vertical axis Y and the internal conical section S is between 45 and 75 degrees, for example of the order of 60 °.

Description

L'invention se rapporte aux circuits de climatisation, notamment pour véhicules automobiles. L'invention concerne plus particulièrement un accumulateur et un circuit de climatisation parcouru par un fluide réfrigérant comprenant notamment un compresseur, un évaporateur et un détendeur et un tel accumulateur.The invention relates to air conditioning circuits, particularly for motor vehicles. The invention relates more particularly to an accumulator and an air conditioning circuit traversed by a refrigerant including a compressor, an evaporator and an expander and such an accumulator.

Dans un circuit de climatisation classique, le fluide réfrigérant, tel que le composé désigné « R744 » (ou CO2), « R134a » ou « HFO-1234yf », est présent sous deux phases différentes, à savoir une phase gazeuse et une phase liquide.In a conventional air conditioning circuit, the refrigerant, such as the compound designated "R744" (or CO 2 ), "R134a" or "HFO-1234yf", is present in two different phases, namely a gas phase and a phase liquid.

Le fluide réfrigérant gazeux est comprimé par un compresseur puis condensé à l'état liquide dans un condenseur, puis détendu dans un détendeur. De là, il gagne un évaporateur où il se transforme à l'état gazeux pour gagner le compresseur, et ainsi de suite. A la sortie de l'évaporateur, le fluide réfrigérant gagne un accumulateur avant de regagner l'admission du compresseur.The gaseous refrigerant is compressed by a compressor and then condensed in a liquid state in a condenser and then expanded in a pressure reducer. From there, he gains an evaporator where he turns into a gaseous state to win the compressor, and so on. At the exit of the evaporator, the coolant gains an accumulator before regaining the intake of the compressor.

L'accumulateur, monté entre l'évaporateur et le compresseur, permet de séparer les phases liquide et gazeuse du fluide réfrigérant pour empêcher le réfrigérant liquide d'entrer dans le compresseur tout en permettant au réfrigérant gazeux de passer.The accumulator, mounted between the evaporator and the compressor, separates the liquid and gaseous phases of the refrigerant fluid to prevent the liquid refrigerant from entering the compressor while allowing the gaseous refrigerant to pass.

Pour cela, l'accumulateur comprend un réservoir pour recevoir un mélange d'un réfrigérant et d'un lubrifiant et une canalisation disposée à l'intérieur du réservoir. En fonctionnement, le mélange de réfrigérant et de lubrifiant est injecté dans le réservoir depuis l'évaporateur. Le réfrigérant gazeux est alors aspiré dans le compresseur, alors que le réfrigérant liquide restant se dépose dans le réservoir.For this, the accumulator comprises a reservoir for receiving a mixture of a coolant and a lubricant and a pipe disposed inside the reservoir. In operation, the mixture of refrigerant and lubricant is injected into the reservoir from the evaporator. The gaseous refrigerant is then sucked into the compressor, while the remaining liquid refrigerant is deposited in the tank.

Le lubrifiant servant à lubrifier le compresseur et d'autres pièces, circule à travers les tuyaux du circuit de climatisation avec le réfrigérant. Du lubrifiant se dépose dans la partie inférieure du réservoir, sous le réfrigérant liquide. De façon connue, la canalisation est munie d'un orifice de récupération de lubrifiant permettant ainsi de récupérer le lubrifiant depuis la partie inférieure du réservoir. Une partie du lubrifiant récupéré dans la canalisation est alors aspirée vers le compresseur en fonction du débit d'écoulement du réfrigérant passant à travers la canalisation.Lubricant used to lubricate the compressor and other parts circulates through the air conditioning system pipes with the refrigerant. Lubricant is deposited in the lower part of the tank under the liquid refrigerant. In known manner, the pipe is provided with a lubricant recovery port thus allowing the lubricant to be recovered from the lower part of the tank. Part of the lubricant recovered in the pipe is then sucked towards the compressor as a function of the refrigerant flow rate passing through the pipe.

Dans le domaine de l'automobile, l'accumulateur doit pouvoir fonctionner dans différentes positions du véhicule, y compris lorsque celui-ci est en pente. Dans ce cas, il est très important d'assurer un niveau de lubrifiant dans le circuit de climatisation permettant d'assurer le bon fonctionnement du compresseur. Toutefois, le volume de lubrifiant stocké dans les composants du circuit de climatisation et plus particulièrement dans l'accumulateur doit rester limité, de sorte que le compresseur reste suffisamment alimenté en lubrifiant.In the automotive field, the battery must be able to operate in different positions of the vehicle, including when it is sloping. In this case, it is very important to ensure a level of lubricant in the air conditioning circuit to ensure the proper operation of the compressor. However, the volume of lubricant stored in the components of the air conditioning circuit and more particularly in the accumulator must remain limited, so that the compressor remains sufficiently supplied with lubricant.

Le document US-A-4 182 136 décrit un accumulateur selon le préambule de la revendication 1.The document US-A-4,182,136 discloses an accumulator according to the preamble of claim 1.

Le but de la présente invention est donc de proposer un accumulateur et un circuit de climatisation permettant un bon fonctionnement des composants du circuit nécessitant une lubrification, y compris en position inclinée et avec le minimum de volume de lubrifiant stocké dans le réservoir.The object of the present invention is therefore to provide an accumulator and an air conditioning circuit for proper operation of the components of the circuit requiring lubrication, including in an inclined position and with the minimum volume of lubricant stored in the reservoir.

A cet effet, l'invention a pour objet un accumulateur pour un circuit de climatisation selon la revendication 1.For this purpose, the invention relates to an accumulator for an air conditioning circuit according to claim 1.

Ainsi agencé, l'orifice de récupération de lubrifiant reste immergé dans le lubrifiant dans les positions inclinées de l'accumulateur, de sorte que même en position inclinée, l'accumulateur présente toujours une capacité de récupération du lubrifiant permettant de continuer à assurer un bon fonctionnement du circuit, tout en préservant un volume modéré de lubrifiant dans la partie inférieure de réservoir.Thus arranged, the lubricant recovery hole remains immersed in the lubricant in the inclined positions of the accumulator, so that even in inclined position, the accumulator always has a lubricant recovery capacity to continue to ensure a good circuit operation, while preserving a moderate amount of lubricant in the lower tank.

Suivant d'autres caractéristiques de l'accumulateur,

  • la distance entre le centre dudit orifice et le fond du réservoir est comprise entre un et douze millimètres,
  • ladite distance est comprise entre cinq et huit millimètres,
  • une enveloppe périphérique du réservoir est conformée pour rétrécir ladite section interne de ladite partie inférieure du réservoir jusqu'audit fond,
  • l'accumulateur comporte un insert de garniture disposé dans la partie inférieure du réservoir, dont une surface externe épouse la forme du réservoir et dont une surface interne est conformée pour rétrécir ladite section interne de ladite partie inférieure du réservoir jusqu'audit fond,
  • ladite partie inférieure du réservoir présente une forme au moins partiellement conique ou tronconique dont le demi-angle au sommet entre un axe vertical et une face latérale de la section interne, est compris entre 45 et 75 degrés,
  • le sommet d'une première portion en tronc de cône dont le demi-angle au sommet entre un axe vertical et une face latérale de la section interne est compris entre 45 et 75 degrés, se prolonge au moins partiellement par une portion tronconique supplémentaire dont la base correspond au sommet du tronc de cône,
  • le sommet d'une première portion en tronc de cône dont le demi-angle au sommet entre un axe vertical et une face latérale de la section interne est compris entre 45 et 75 degrés, se prolonge par une calotte hémisphérique,
  • ladite canalisation traverse ledit fond du réservoir, l'entrée de ladite canalisation débouchant face à un déflecteur de l'accumulateur, disposé dans une partie supérieure du réservoir.
According to other characteristics of the accumulator,
  • the distance between the center of said orifice and the bottom of the reservoir is between one and twelve millimeters,
  • said distance is between five and eight millimeters,
  • a peripheral shell of the reservoir is shaped to narrow said internal section of said lower portion of the reservoir to said bottom,
  • the accumulator comprises a lining insert disposed in the lower part of the tank, whose outer surface matches the shape of the tank and an inner surface of which is shaped to narrow said internal section of said lower part of the tank to said bottom,
  • said lower part of the reservoir has an at least partially conical or frustoconical shape whose half-angle at the apex between a vertical axis and a lateral face of the internal section is between 45 and 75 degrees,
  • the top of a first truncated cone portion whose half-angle at the apex between a vertical axis and a lateral face of the internal section is between 45 and 75 degrees, is extended at least partly by an additional frustoconical portion of which the base corresponds to the top of the truncated cone,
  • the top of a first truncated cone portion whose half-angle at the apex between a vertical axis and a lateral face of the internal section is between 45 and 75 degrees, is extended by a hemispherical cap,
  • said pipe passes through said bottom of the tank, the inlet of said pipe opening towards a deflector of the accumulator, disposed in an upper part of the tank.

L'invention a aussi pour objet un circuit de climatisation destiné à faire partie d'un véhicule automobile pour assurer la climatisation de l'habitacle, propre à être parcouru par un fluide réfrigérant, comprenant un compresseur, un condenseur, un détendeur et un évaporateur, caractérisé en ce qu'il comporte un accumulateur tel que décrit précédemment.The invention also relates to an air conditioning circuit intended to be part of a motor vehicle to ensure the air conditioning of the passenger compartment, adapted to be traversed by a refrigerant, comprising a compressor, a condenser, a pressure reducer and an evaporator , characterized in that it comprises an accumulator as described above.

D'autres avantages et caractéristiques apparaîtront à la lecture de la description de l'invention, ainsi que des dessins annexés sur lesquels :

  • la figure 1 représente un premier exemple de circuit de climatisation,
  • la figure 2 représente un deuxième exemple de circuit de climatisation,
  • la figure 3 représente un troisième exemple de circuit de climatisation,
  • la figure 4a représente une vue en coupe d'un accumulateur, cet exemple ne fait pas partie de l'invention,
  • la figure 4b représente une vue de l'accumulateur de la figure 4a, incliné d'un angle de 30° par rapport à un axe vertical,
  • la figure 5a représente une vue en coupe d'un accumulateur réalisé selon un premier mode de réalisation avec une partie inférieure réalisée selon un premier exemple,
  • la figure 5b représente une vue de l'accumulateur de la figure 5a, incliné d'un angle de 30° par rapport à un axe vertical,
  • la figure 6a représente une vue en coupe d'un accumulateur réalisé selon un premier mode de réalisation avec une partie inférieure réalisée selon un deuxième exemple,
  • la figure 6b représente un détail de la partie inférieure de l'accumulateur de la figure 6a,
  • la figure 6c représente une vue de l'accumulateur de la figure 6a, incliné d'un angle de 30° par rapport à un axe vertical,
  • la figure 7a est une vue en perspective d'une calotte hémisphérique,
  • la figure 7b est une vue en coupe AA de la calotte hémisphérique de la figure 7a,
  • la figure 8a représente une vue en coupe d'un accumulateur, cet exemple ne fait pas partie de l'invention,
  • la figure 8b représente une vue de l'accumulateur de la figure 8a, incliné d'un angle de 30° par rapport à un axe vertical,
  • la figure 9a représente une vue en coupe d'un accumulateur, cet exemple ne fait pas partie de l'invention,
  • la figure 9b représente une vue de l'accumulateur de la figure 9a, incliné d'un angle de 30° par rapport à un axe vertical et,
  • les figures 10a et 10c représentent une vue en coupe d'un accumulateur, ces exemples ne font pas partie de l'invention.
Other advantages and characteristics will appear on reading the description of the invention, as well as the appended drawings in which:
  • the figure 1 represents a first example of an air conditioning circuit,
  • the figure 2 represents a second example of air conditioning circuit,
  • the figure 3 represents a third example of an air conditioning circuit,
  • the figure 4a represents a sectional view of an accumulator, this example does not form part of the invention,
  • the figure 4b represents a view of the accumulator of the figure 4a , inclined at an angle of 30 ° with respect to a vertical axis,
  • the figure 5a represents a sectional view of an accumulator made according to a first embodiment with a lower part made according to a first example,
  • the figure 5b represents a view of the accumulator of the figure 5a , inclined at an angle of 30 ° with respect to a vertical axis,
  • the figure 6a represents a sectional view of an accumulator made according to a first embodiment with a lower part made according to a second example,
  • the figure 6b represents a detail of the lower part of the accumulator of the figure 6a ,
  • the Figure 6c represents a view of the accumulator of the figure 6a , inclined at an angle of 30 ° with respect to a vertical axis,
  • the figure 7a is a perspective view of a hemispherical cap,
  • the figure 7b is a sectional view AA of the hemispherical cap of the figure 7a ,
  • the figure 8a represents a sectional view of an accumulator, this example does not form part of the invention,
  • the figure 8b represents a view of the accumulator of the figure 8a , inclined at an angle of 30 ° with respect to a vertical axis,
  • the figure 9a represents a sectional view of an accumulator, this example does not form part of the invention,
  • the figure 9b represents a view of the accumulator of the figure 9a , inclined at an angle of 30 ° to a vertical axis and,
  • the figures 10a and 10c are a sectional view of a battery, these examples are not part of the invention.

Sur ces figures, les éléments identiques portent les mêmes numéros de référence.In these figures, the identical elements bear the same reference numbers.

On se réfère d'abord à la figure 1 représentant un circuit de climatisation 1 destiné à faire partie d'un véhicule automobile pour assurer la climatisation de l'habitacle. Le circuit 1 est propre à être parcouru par un fluide réfrigérant, tel que le composé désigné « R744 » (ou CO2), « R134a » ou « HFO-1234yf ».We first refer to the figure 1 representing an air conditioning circuit 1 intended to be part of a motor vehicle to provide air conditioning of the passenger compartment. The circuit 1 is able to be traversed by a refrigerant, such as the compound designated "R744" (or CO 2 ), "R134a" or "HFO-1234yf".

Le circuit 1 comprend un compresseur 2, à cylindrée fixe ou variable, propre à comprimer le fluide réfrigérant en phase gazeuse depuis une basse pression jusqu'à une haute pression. Le fluide réfrigérant ainsi comprimé et réchauffé traverse ensuite un condenseur 3 propre à être balayé par un flux d'air pour refroidir le fluide réfrigérant. À la sortie du condenseur 3, le fluide réfrigérant est envoyé vers un détendeur 4 dans lequel il passe d'une haute pression à une basse pression pour être refroidi avant de gagner un évaporateur 5. Celui-ci est propre à être balayé par un flux d'air qui est refroidi par échange thermique avec le fluide réfrigérant pour produire un flux d'air refroidi, encore appelé air climatisé, à envoyer dans l'habitacle du véhicule.The circuit 1 comprises a compressor 2, with fixed or variable displacement, capable of compressing the refrigerant in the gas phase from a low pressure up to high pressure. The refrigerant fluid thus compressed and heated then passes through a condenser 3 capable of being swept by a flow of air to cool the refrigerant. At the outlet of the condenser 3, the refrigerant is sent to a pressure reducer 4 in which it passes from a high pressure to a low pressure to be cooled before gaining an evaporator 5. This is suitable for being swept by a flow air that is cooled by heat exchange with the coolant to produce a cooled air flow, also called air conditioning, to be sent into the passenger compartment of the vehicle.

À la sortie de l'évaporateur 5, le fluide réfrigérant passe par un accumulateur 6 avant de regagner le compresseur 2. L'accumulateur 6 comporte un réservoir 7 et une canalisation 8 agencée dans le réservoir 7 pour prélever par une entrée 8a, la phase gazeuse du fluide réfrigérant. La canalisation 8 achemine ensuite le fluide vers l'admission du compresseur 2 par une sortie 8b destinée à être mise en communication avec l'entrée du compresseur 2 (voir par exemple la figure 4a). L'accumulateur 6 sert notamment de séparateur gaz/liquide pour maintenir une pression stabilisée de fluide réfrigérant.At the outlet of the evaporator 5, the refrigerant passes through an accumulator 6 before returning to the compressor 2. The accumulator 6 comprises a reservoir 7 and a pipe 8 arranged in the reservoir 7 to collect through an inlet 8a, the phase gaseous refrigerant. The pipe 8 then conveys the fluid to the inlet of the compressor 2 through an outlet 8b intended to be placed in communication with the inlet of the compressor 2 (see for example the figure 4a ). The accumulator 6 serves in particular as a gas / liquid separator for maintaining a stabilized refrigerant pressure.

La figure 2 illustre un deuxième exemple de circuit de climatisation 1 comportant un échangeur de chaleur interne 9. À la sortie du condenseur 3, le fluide réfrigérant est envoyé vers l'échangeur de chaleur interne 9 et parvient ensuite au détendeur 4. De même, en sortie d'accumulateur 6, le fluide traverse à nouveau l'échangeur de chaleur interne 9 avant de regagner le compresseur 2. Dans l'échangeur de chaleur interne 9, le fluide réfrigérant circulant dans la partie à haute pression de l'échangeur de chaleur interne 9, échange de la chaleur avec le fluide réfrigérant refroidi et à basse pression.The figure 2 illustrates a second example of an air conditioning circuit 1 comprising an internal heat exchanger 9. At the outlet of the condenser 3, the refrigerant is sent to the internal heat exchanger 9 and then reaches the expander 4. 6, the fluid passes through the internal heat exchanger 9 before returning to the compressor 2. In the internal heat exchanger 9, the refrigerant circulating in the high pressure portion of the internal heat exchanger 9 , exchanging heat with the coolant cooled and at low pressure.

Dans un troisième exemple illustré en figure 3, le circuit de climatisation 1 comporte un accumulateur 6 présentant un échangeur de chaleur interne 10, agencé par exemple autour de la canalisation et intégré dans le réservoir de l'accumulateur 6, de manière que le fluide réfrigérant surchauffé à haute pression échange de la chaleur avec le fluide réfrigérant refroidi et à basse pression compris dans la canalisation.In a third example illustrated in figure 3 , the air conditioning circuit 1 comprises an accumulator 6 having an internal heat exchanger 10, arranged for example around the pipe and integrated in the tank of the accumulator 6, so that the superheated refrigerant fluid at high pressure exchange of heat with the coolant refrigerant and low pressure included in the pipe.

Mieux visible sur la figure 4a représentant un accumulateur 6 en position verticale, le réservoir 7 de l'accumulateur 6 est délimité par une enveloppe périphérique 11, par exemple cylindrique, se terminant par un fond 12 correspondant à l'extrémité inférieure basse du réservoir 7.Better visible on the figure 4a representing an accumulator 6 in vertical position, the reservoir 7 of the accumulator 6 is delimited by a peripheral envelope 11, for example cylindrical, terminating in a bottom 12 corresponding to the lower lower end of the reservoir 7.

Le réservoir 7 est en outre fermé dans sa partie supérieure 13 par un couvercle (non représenté). On peut prévoir également un bouchon de fermeture 14 au fond 12 de l'accumulateur 6 (voir par exemple, la figure 6b).The reservoir 7 is further closed in its upper part 13 by a lid (not shown). It is also possible to provide a closure plug 14 at the bottom 12 of the accumulator 6 (see, for example, figure 6b ).

La partie inférieure 15 du réservoir 7 est destinée à contenir un lubrifiant 17, tel que de l'huile. Le lubrifiant sert à lubrifier le compresseur 2 et d'autres composants du circuit 1. Un orifice de récupération de lubrifiant 18 est ménagé dans la canalisation 8, au niveau de la partie inférieure 15 du réservoir 7. Le diamètre de l'orifice 18 est par exemple compris entre 0,8 et 1,4 millimètre pour un OCR (rapport de la masse de lubrifiant sur la masse de fluide réfrigérant), pouvant aller de 0,5% à 6%.The lower portion 15 of the reservoir 7 is intended to contain a lubricant 17, such as oil. The lubricant serves to lubricate the compressor 2 and other components of the circuit 1. A lubricant recovery port 18 is provided in the pipe 8, at the lower portion 15 of the reservoir 7. The diameter of the orifice 18 is for example between 0.8 and 1.4 millimeters for an OCR (ratio of the mass of lubricant to the coolant mass), which can range from 0.5% to 6%.

Selon un premier mode de réalisation visible sur les figures 5a, 5b, 6a à 6c, 7a et 7b, la canalisation 8 présente un coude sensiblement en forme de « J » au niveau de la partie inférieure 15 du réservoir 7, l'entrée 8a de la canalisation 8 débouchant dans la partie supérieure 13 du réservoir 7, la sortie 8b étant destinée à être mise en communication avec l'admission du compresseur 2. L'accumulateur 6 permet ainsi de séparer les phases liquide et gazeuse du fluide réfrigérant en permettant au réfrigérant gazeux seul de passer vers le compresseur 2, via l'entrée 8a.According to a first embodiment visible on the figures 5a , 5b , 6a to 6c, 7a and 7b , the pipe 8 has a substantially "J" -shaped bend at the lower part 15 of the tank 7, the inlet 8a of the pipe 8 opening into the upper part 13 of the tank 7, the outlet 8b being intended to be placed in communication with the intake of the compressor 2. The accumulator 6 thus makes it possible to separate the liquid and gaseous phases of the refrigerant fluid by allowing the gaseous refrigerant alone to pass towards the compressor 2, via the inlet 8a.

L'orifice de récupération de lubrifiant 18 est ménagé au niveau du coude de la canalisation 8, par exemple dans une position centrale à son extrémité inférieure, en regard du fond 12. En fonctionnement, le lubrifiant circule à travers les tuyaux du circuit de climatisation 1 avec le réfrigérant. Une partie du lubrifiant se dépose sur le fond du réservoir 7 avec le réfrigérant, sous forme liquide 16, 17. Une partie du lubrifiant 17 récupéré dans la canalisation 8 est aspirée vers le compresseur 2 en fonction du débit d'écoulement du réfrigérant passant à travers la canalisation 8.The lubricant recovery orifice 18 is formed at the bend of the pipe 8, for example in a central position at its lower end, opposite the bottom 12. In operation, the lubricant flows through the pipes of the air conditioning circuit. 1 with the refrigerant. Part of the lubricant is deposited on the bottom of the tank 7 with the refrigerant, in liquid form 16, 17. Part of the lubricant 17 recovered in the pipe 8 is sucked towards the compressor 2 as a function of the flow rate of the refrigerant passing through the pipe 8.

On prévoit par exemple un filtre au niveau de l'orifice 18 pour empêcher que des particules polluantes puissent venir colmater l'orifice 18 (non représenté). L'accumulateur 6 peut également comporter un système dessicatif 19 dans le réservoir 9, afin de protéger de l'humidité les différents composants du circuit de climatisation 1. Ce système dessicatif 19 comporte par exemple un sac ou une cartouche de sel dessicatif.For example, a filter is provided at the orifice 18 to prevent polluting particles from clogging the orifice 18 (not shown). The accumulator 6 may also include a desiccant system 19 in the reservoir 9, in order to protect the various components of the air conditioning circuit 1 from moisture. This desiccant system 19 comprises, for example, a bag or a desiccant salt cartridge.

La distance d entre le centre de l'orifice 18 et le fond 12 du réservoir 7 est comprise entre un et douze millimètres. Par exemple, la distance d est comprise entre cinq et huit millimètres.The distance d between the center of the orifice 18 and the bottom 12 of the reservoir 7 is between one and twelve millimeters. For example, the distance d is between five and eight millimeters.

En outre, la section interne S de la partie inférieure 15 du réservoir 7 rétrécit jusqu'au fond d 12. On prévoit par exemple que l'enveloppe périphérique 11 du réservoir 7 est conformée pour rétrécir la section interne S de la partie inférieure 15 jusqu'au fond 12 du réservoir 7. La forme de la partie inférieure 15 de l'enveloppe périphérique 11 du réservoir 7 est alors conçue de manière que la section interne S rétrécisse jusqu'au fond 12, par exemple par moulage ou par thermoformage (figure 10b). Alternativement, l'accumulateur 6 comporte un insert de garniture 20 disposé dans la partie inférieure 15 du réservoir 7, conformé pour rétrécir la section interne S de la partie inférieure 15 jusqu'au fond 12. L'insert de garniture 20 peut être réalisé en plastique ou en métal.In addition, the inner section S of the lower part 15 of the reservoir 7 shrinks to the bottom d 12. For example, it is provided that the peripheral envelope 11 of the reservoir 7 is shaped to narrow the internal section S of the lower part 15 until at the bottom 12 of the reservoir 7. The shape of the lower part 15 of the peripheral envelope 11 of the reservoir 7 is then designed so that the internal section S narrows to the bottom 12, for example by molding or by thermoforming ( figure 10b ). Alternatively, the accumulator 6 comprises a lining insert 20 disposed in the lower part 15 of the reservoir 7, shaped to narrow the internal section S of the lower portion 15 to the bottom 12. The lining insert 20 can be made of plastic or metal.

Selon un exemple illustré par les figures 4a et 4b et qui ne fait pas partie de l'invention, la partie inférieure 15 du réservoir 7 présente une forme au moins partiellement conique ou tronconique (renversé) dont le demi-angle β au sommet, entre un axe vertical Y et une face latérale de la section interne conique, est compris entre 45 et 75 degrés, par exemple de l'ordre de 60°. La section interne S du cône passant par un plan parallèle à la base est alors définie par un cercle se rétrécissant jusqu'au fond 12 du réservoir 7. La partie inférieure 15 du réservoir présente ainsi une forme sensiblement en entonnoir. L'angle α, complémentaire du demi-angle β, entre une face latérale de la section interne S 15 du réservoir 7 et un plan horizontal, est ainsi compris entre 15 et 45° (de l'ordre de 30° dans l'exemple considéré).According to an example illustrated by Figures 4a and 4b and which does not form part of the invention, the lower part 15 of the reservoir 7 has a shape at least partially conical or frustoconical (inverted) whose half-angle β at the top, between a vertical axis Y and a lateral face of the internal conical section, is between 45 and 75 degrees, for example of the order of 60 °. The inner section S of the cone passing through a plane parallel to the base is then defined by a circle narrowing to the bottom 12 of the reservoir 7. The lower portion 15 of the reservoir thus has a substantially funnel-shaped shape. The angle α, complementary to the half-angle β, between a lateral face of the internal section S 15 of the reservoir 7 and a horizontal plane, is thus between 15 and 45 ° (of the order of 30 ° in the example).

On prévoit une forme en tronc de cône par exemple pour disposer un bouchon dans le fond 12 en forme de disque. Le fond 12 peut présenter un diamètre compris entre 10 et 40 millimètres.A truncated cone shape is provided, for example, to provide a plug in the disk-shaped bottom 12. The bottom 12 may have a diameter of between 10 and 40 millimeters.

Ainsi agencé, on constate qu'en position inclinée d'un angle θ avec l'axe vertical Y, pouvant aller jusqu'30° (figure 4b), l'orifice 18 reste immergé dans le lubrifiant 17, avec un volume minimum de lubrifiant 17 stocké dans la partie inférieure 15 du réservoir 7, de l'ordre de 3 cm3, et avec une très bonne efficacité de séparation, de l'ordre de 0,95.Thus arranged, it is found that in inclined position of an angle θ with the vertical axis Y, up to 30 ° ( figure 4b ), the orifice 18 remains immersed in the lubricant 17, with a minimum volume of lubricant 17 stored in the lower part 15 of the reservoir 7, of the order of 3 cm 3 , and with a very good separation efficiency, order of 0.95.

Selon l'exemple représenté sur les figures 5a et 5b, qui fait partie de l'invention, le sommet d'une première portion en tronc de cône se prolonge au moins partiellement par une portion tronconique supplémentaire dont la base D2 correspond au sommet de la première portion tronconique. La base D2 peut présenter une dimension comprise entre 20 et 60 millimètres.According to the example shown on figures 5a and 5b , which is part of the invention, the top of a first truncated cone portion is extended at least partially by an additional frustoconical portion whose base D2 corresponds to the top of the first frustoconical portion. The base D2 may have a size of between 20 and 60 millimeters.

Le demi-angle au sommet β de la première portion en tronc de cône, entre un axe vertical Y et une face latérale de la section interne S tronconique, est compris entre 45 et 75 degrés, et le fond 12 comporte par exemple un diamètre D1 compris entre 10 et 40 millimètres. L'angle α, complémentaire du demi-angle β, entre une face latérale de la section interne S du réservoir 7 et un plan horizontal, est ainsi compris entre 15 et 45° (de l'ordre de 30° dans l'exemple considéré).The half-angle at the vertex β of the first truncated cone portion, between a vertical axis Y and a lateral face of the frustoconical internal section S, is between 45 and 75 degrees, and the bottom 12 comprises, for example, a diameter D1 between 10 and 40 millimeters. The angle α complementary to the half-angle β between a lateral face of the internal section S of the reservoir 7 and a horizontal plane is thus between 15 and 45 ° (of the order of 30 ° in the example under consideration. ).

En position inclinée d'un angle θ avec l'axe vertical Y, allant jusqu'35° (30° sur la figure 5b) l'orifice 18 reste immergé dans le lubrifiant 17, avec un volume de lubrifiant 17 encore réduit par rapport au premier exemple.In inclined position of an angle θ with the vertical axis Y, up to 35 ° (30 ° on the figure 5b ) the orifice 18 remains immersed in the lubricant 17, with a volume of lubricant 17 further reduced compared to the first example.

On peut ainsi envisager d'autres formes de la partie inférieure 15 du réservoir 7, conformées pour réduire la section interne S, par exemple avec plus de deux portions tronconique consécutives, de manière à réduire au maximum de volume de lubrifiant.It is thus possible to envisage other forms of the lower part 15 of the reservoir 7, shaped to reduce the internal section S , for example with more than two consecutive frustoconical portions, so as to reduce the volume of lubricant to the maximum.

Les figures 6a, 6b et 6c représentent une variante dans laquelle l'accumulateur 6 comporte un insert de garniture 20 disposé dans la partie inférieure 15 du réservoir 7, dont une surface externe 20a épouse la forme du réservoir 7 et dont une surface interne 20b est conformée pour rétrécir la section interne S de la partie inférieure 15 jusqu'au fond 12.The Figures 6a, 6b and 6c represent a variant in which the accumulator 6 comprises a lining insert 20 disposed in the lower portion 15 of the tank 7, an outer surface 20a of which is in the shape of the tank 7 and whose inner surface 20b is shaped to narrow the internal section S from the bottom 15 to the bottom 12.

Par exemple, le sommet d'une première portion en tronc de cône dont le demi-angle au sommet β, entre un axe vertical Y et une face latérale de la section interne S tronconique, est compris entre 45 et 75 degrés, se prolonge au moins partiellement par une portion sphérique épousant la forme du coude de la canalisation 8, se prolongeant elle-même par une portion tronconique supplémentaire. La portion sphérique permet de rétrécir la section interne S en épousant partiellement la forme du coude de manière à former un moyen de support de la canalisation 8.For example, the top of a first truncated cone portion whose half-angle at the vertex β between a vertical axis Y and a lateral face of the frustoconical internal section S is between 45 and 75 degrees, extends to less partially by a spherical portion conforming to the shape of the bend of the pipe 8, extending itself by an additional frustoconical portion. The spherical portion makes it possible to narrow the internal section S by partially matching the shape of the elbow so as to form a support means for the pipe 8.

En position inclinée d'un angle θ avec l'axe vertical Y, jusqu'35° (30° sur la figure 6c) l'orifice 18 reste immergé dans le lubrifiant 17, avec un volume de lubrifiant 17 réduit.In inclined position of an angle θ with the vertical axis Y, up to 35 ° (30 ° on the Figure 6c ) the orifice 18 remains immersed in the lubricant 17, with a reduced volume of lubricant 17.

On distingue également sur ces figures, un exemple de réalisation du filtre 21 au niveau de l'orifice 18. Le filtre 21 est fixé par deux bagues 22a, 22b disposées de part et d'autre de l'orifice 18 au niveau du coude de la canalisation 8.In these figures, an embodiment of the filter 21 is also visible at the orifice 18. The filter 21 is fixed by two rings 22a, 22b disposed on either side of the orifice 18 at the elbow. Line 8.

Les figures 7a et 7b représentent un autre exemple de réalisation d'un insert de garniture 20, dont une surface externe 20a épouse la forme d'un réservoir 7 et dont une surface interne 20b est conformée pour rétrécir la section interne S de la partie inférieure 15 jusqu'au fond 12 du réservoir 7. Le sommet d'une première portion en tronc de cône se prolonge par une portion sphérique formant un moyen de support de la canalisation 8, se prolongeant par une portion tronconique supplémentaire.The Figures 7a and 7b represent another embodiment of a lining insert 20, whose outer surface 20a takes the form of a reservoir 7 and an inner surface 20b is shaped to narrow the inner section S of the lower portion 15 to the bottom 12 of the reservoir 7. The top of a first portion truncated cone is extended by a spherical portion forming a support means of the pipe 8, extending by an additional frustoconical portion.

Selon un autre exemple illustré par les figures 8a et 8b, la partie inférieure 15 du réservoir 7 présente une première portion en forme au moins partiellement tronconique (renversé) dont le demi-angle au sommet β, entre un axe vertical Y et une face latérale de la section interne S tronconique, est compris entre 45 et 75 degrés. Le sommet D3 de cette première portion se prolonge par une portion concave, telle qu'une calotte hémisphérique. Par exemple, le sommet D3 présente une dimension comprise entre 30 et 60 millimètres.According to another example illustrated by figures 8a and 8b , the lower part 15 of the reservoir 7 has a first portion in at least partially frustoconical (inverted) shape, the half-angle at the top β, between a vertical axis Y and a lateral face of the frustoconical internal section S is between 45 and 75 degrees. The top D3 of this first portion is extended by a concave portion, such as a hemispherical cap. For example, the vertex D3 has a size of between 30 and 60 millimeters.

En position inclinée d'un angle θ avec l'axe vertical Y, jusqu'35° (30° sur la figure 8b) l'orifice 18 reste immergé dans le lubrifiant 17, avec un volume de lubrifiant 17 minimum.In inclined position of an angle θ with the vertical axis Y, up to 35 ° (30 ° on the figure 8b ) the orifice 18 remains immersed in the lubricant 17, with a minimum volume of lubricant 17.

Selon l'exemple illustré par les figures 9a et 9b, qui ne fait pas partie de l'invention, la canalisation 8 est droite et traverse le fond 12 du réservoir 7, l'entrée 8a de la canalisation 8 débouchant face à un déflecteur 23 de l'accumulateur 6, disposé dans une partie supérieure 13 du réservoir 7.According to the example illustrated by Figures 9a and 9b , which does not form part of the invention, the pipe 8 is straight and passes through the bottom 12 of the tank 7, the inlet 8a of the pipe 8 opening towards a deflector 23 of the accumulator 6, disposed in an upper part 13 of the tank 7.

L'orifice de récupération de lubrifiant 18 est ménagé à la distance d du fond 12 sur une paroi latérale de la canalisation 8. Comme précédemment, la distance d entre le centre de l'orifice 18 et le fond 12 du réservoir 7, est comprise entre un et douze millimètres, par exemple, entre cinq et huit millimètres. En outre, la section interne S de la partie inférieure 15 du réservoir 7 rétrécit jusqu'au fond 12.The lubricant recovery orifice 18 is provided at the distance d from the bottom 12 on a side wall of the pipe 8. As previously, the distance d between the center of the orifice 18 and the bottom 12 of the reservoir 7 is comprised between one and twelve millimeters, for example, between five and eight millimeters. In addition, the inner section S of the lower portion 15 of the reservoir 7 shrinks to the bottom 12.

Lors du fonctionnement, le mélange de fluide réfrigérant et de lubrifiant est injecté dans le réservoir 7 depuis l'évaporateur 5 et vient frapper la partie supérieure du déflecteur 23. La partie gazeuse du fluide est aspirée dans le compresseur 2 via l'entrée 8a de la canalisation 8, alors que le fluide réfrigérant liquide restant se dépose dans la partie inférieure 15 du réservoir 7 avec le lubrifiant.During operation, the mixture of coolant and lubricant is injected into the tank 7 from the evaporator 5 and strikes the upper part of the deflector 23. The gaseous part of the fluid is sucked into the compressor 2 via the inlet 8a of the the pipe 8, while the remaining liquid coolant is deposited in the lower portion 15 of the reservoir 7 with the lubricant.

Dans l'exemple illustré par les figures 9a et 9b, la partie inférieure 15 du réservoir 7 présente une forme au moins partiellement tronconique dont le demi-angle au sommet β, entre un axe vertical Y et la section interne S conique est compris entre 45 et 75 degrés, par exemple de l'ordre de 60°.In the example illustrated by the Figures 9a and 9b , the lower part 15 of the reservoir 7 has an at least partially frustoconical shape whose half-angle at the vertex β, between a vertical axis Y and the internal conical section S is between 45 and 75 degrees, for example of the order of 60 °.

On constate qu'avec ce deuxième mode de réalisation, en position inclinée d'un angle θ avec l'axe vertical Y, pouvant aller jusqu'35°, l'orifice 18 reste immergé dans le lubrifiant 17, avec un minimum de lubrifiant 17 stocké dans la partie inférieure 15 du réservoir 7.

  • Bien qu'un seul exemple ait été représenté, la partie inférieure 15 peut également présenter une forme différente permettant de réduire la section interne S, telle qu'une première portion en tronc de cône se prolongeant au moins partiellement par une portion tronconique supplémentaire dont la base correspond au sommet du tronc de cône.
It can be seen that with this second embodiment, in an inclined position of an angle θ with the vertical axis Y, which can go up to 35 °, the orifice 18 remains immersed in the lubricant 17, with a minimum of lubricant 17 stored in the lower part 15 of the reservoir 7.
  • Although only one example has been shown, the lower part 15 may also have a different shape making it possible to reduce the internal section S , such that a first truncated cone portion extending at least partially through an additional frustoconical portion whose base corresponds to the top of the truncated cone.

Claims (9)

  1. Accumulator for an air-conditioning circuit (1) intended to have a refrigerant passed through it, the said accumulator comprising a reservoir (7) ending in a bottom (12) and a pipe (8) arranged in the reservoir (7), the said pipe (8) being equipped with a lubricant recovery orifice (18) level with a lower part (15) of the reservoir (7) which lower part is intended to contain the said lubricant and ends in the said bottom (12), the said pipe (8) having an elbow in the region of the said lower part (15) of the reservoir (7), the lubricant recovery orifice (18) being formed at the bottom end of the said elbow, the inlet (8a) of the said pipe (8) opening into an upper part (13) of the reservoir (7), and the said lower part (15) of the reservoir (7) having an internal section (S) that narrows down as far as the said bottom (12), characterized in that the said internal section (S) at least partially hugs the shape of the said elbow so as to form a means of supporting the said pipe (8).
  2. Accumulator according to Claim 1, characterized in that the distance (d) between the centre of the said orifice (18) and the bottom (12) of the reservoir (7) is between one and twelve millimetres.
  3. Accumulator according to Claim 1, characterized in that the said distance (d) is between five and eight millimetres.
  4. Accumulator according to any one of the preceding claims, characterized in that a peripheral shell (11) of the reservoir (7) is configured to narrow the said internal section (S) of the said lower part (15) of the reservoir (7) down to the said bottom (12).
  5. Accumulator according to any one of Claims 1 to 3, characterized in that it comprises a liner insert (20) placed in the lower part (15) of the reservoir (7) and of which an external surface (20b) hugs the shape of the reservoir (7) and an internal surface (20a) is configured to narrow said internal section (S) of the said lower part (15) of the reservoir (7) down to the said bottom (12).
  6. Accumulator according to any one of the preceding claims, characterized in that the said lower part (15) of the reservoir (7) has an at least partially conical or frustoconical shape of which the vertex half-angle (β) between a vertical axis (Y) and a lateral face of the internal section (S) is between 45 and 75 degrees.
  7. Accumulator according to Claim 6, characterized in that the vertex of a first cone-frustum portion of which the vertex half-angle (β) between a vertical axis (Y) and a lateral face of the internal section (S) is between 45 and 75 degrees, is extended at least partially by an additional frustoconical portion of which the base (D2) corresponds to the vertex of the cone frustum.
  8. Accumulator according to Claim 6, characterized in that the vertex of a first cone-frustum portion of which the vertex half-angle (β) between a vertical axis (Y) and a lateral face of the internal section (S) is between 45 and 75 degrees, is extended by a hemispherical cap.
  9. Air conditioning circuit intended to form part of a motor vehicle for air-conditioning the interior, through which a refrigerant can pass, comprising a compressor (2), a condenser (3), an expansion valve (4) and an evaporator (5), characterized in that it comprises an accumulator (6) according to any one of the preceding claims.
EP10153459.2A 2009-02-18 2010-02-12 Accumulator and climatisation circuit with such accumulator Active EP2221560B1 (en)

Priority Applications (1)

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PL10153459T PL2221560T3 (en) 2009-02-18 2010-02-12 Accumulator and climatisation circuit with such accumulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0900737A FR2942306B1 (en) 2009-02-18 2009-02-18 ACCUMULATOR AND AIR CONDITIONING CIRCUIT

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EP2221560A1 EP2221560A1 (en) 2010-08-25
EP2221560B1 true EP2221560B1 (en) 2015-08-19

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EP (1) EP2221560B1 (en)
FR (1) FR2942306B1 (en)
HU (1) HUE027708T2 (en)
PL (1) PL2221560T3 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182136A (en) * 1977-12-22 1980-01-08 Tecumseh Products Company Suction accumulator
DE10058513A1 (en) * 2000-11-24 2002-06-20 Obrist Engineering Gmbh Lusten collector
GB2386939A (en) * 2000-12-29 2003-10-01 Visteon Global Tech Inc Accumulator with an internal heat exchanger
JP2008241088A (en) * 2007-03-27 2008-10-09 Calsonic Kansei Corp Accumulator

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Publication number Publication date
EP2221560A1 (en) 2010-08-25
FR2942306A1 (en) 2010-08-20
HUE027708T2 (en) 2016-10-28
FR2942306B1 (en) 2012-07-13
PL2221560T3 (en) 2016-04-29

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