Injector for a gas tank and tank equipped with such an injector

Abstract

An injector (1) for a gas reservoir (10), the injector (1) comprising a conduit (2) extending along a longitudinal principal axis (X2) and intended to fluidly connect a pressurized gas source and a reservoir (10), the conduit (2) comprising an inlet port (23) for receiving the pressurized gas and an outlet port (24) opening into the reservoir (10), the conduit (2) defining two distinct gas flow circuits (25, 26) between the inlet port (23) and the outlet port (24): a first circuit (25) for the flow of a first gas stream and a second circuit (26) for the flow of a second gas stream, characterized in that the first circuit (25) and the second circuit (26) converge at the outlet port (24) and are configured to impart to the first and second streams, respectively, a first discharge velocity and a second evacuation speed,the first evacuation speed being different from the second evacuation speed. Abbreviated figure: Fig. 3,

Description

Title of the invention: Injector for a gas tank and tank equipped with such an injector

[0001] The invention relates to an injector for a gas tank. The invention also relates to a gas tank equipped with such an injector.

[0002] This refers in particular to an injector configured to inject a flow of gas into a tank, preferably in a substantially horizontal injection direction in the operating configuration. This horizontal direction can be defined between two opposite sides of the tank.

[0003] By horizontal direction of the jet, we mean, for example, a jet having an angle of less than 30° with respect to the horizontal. This injection angle can vary during filling depending on the gas inlet velocity into the injector. The variation of the injection angle is achieved without the use of a moving part or actuator in the injector.

[0004] The filling of a gas tank is carried out at a mass flow rate that must not exceed a certain level imposed by standards. For example, the maximum mass flow rate is limited to 60 g / s for a light vehicle tank. With this fixed mass flow rate, the injection speed of the gas into the tank decreases proportionally with the increase in the density and pressure of the gas already present in the tank.

[0005] In a horizontal tank, when the injection velocity is insufficient, the inertial forces of the jet are dominated by the buoyant forces (or volumetric forces). The jet's trajectory is then deflected towards the lower part of the tank, limiting the mixing of the gas within the tank. This results in vertical thermal stratification within the tank.

[0006] In contrast, a gas jet with a relatively high injection velocity directed towards the upper part of the horizontal tank allows for better mixing of the gas already in the tank, leading to a thermally homogeneous mixture within the tank. However, in some cases, such a jet may reach the upper wall of the tank and cause a horizontal thermal gradient.

[0007] The thermal gradient in a tank constitutes a risk of the appearance of hot spots with a temperature exceeding the threshold set by the SAE J2601 standard, i.e. 85 °C.

[0008] To promote mixing in a tank and limit the risks of hot spots appearing, the applicant filed patent application no. FR2400140 which describes an injector for a gas tank.

[0009] This injector includes a conduit for fluidly connecting a gas source to the tank to be filled. In particular, the conduit includes an inlet port for receiving a gas flow, and an outlet port that opens into the tank to be filled.

[0010] The injector also includes a movable part configured to move inside the pipe, between a first extreme position in which the movable part gives the outlet orifice a minimum passage area and a second extreme position in which the movable part gives the outlet orifice a maximum passage area. In particular, the movable part may include a deformable tab that is fixed obliquely inside the pipe, at the outlet orifice.

[0011] In another patent application No. FR2407146 filed by the applicant, a second injector is described which includes a main conduit and a deformable element disposed in the main conduit.

[0012] In particular, the main conduit comprises a plurality of outlet orifices, each intended to inject the flow into the reservoir in a direction parallel to the main longitudinal axis. The deformable element is configured to deform between a first extreme configuration in which the deformable element confers a minimum passage area to all or part of the outlet orifices, and a second extreme configuration in which the deformable element confers a maximum passage area to all or part of the outlet orifices.

[0013] The two injectors described above make it possible to modify the cross-sectional area through which the gas passes via the outlet orifice, and to maintain the gas injection velocity at a certain level when the gas density in the tank increases. This level is sufficient to promote optimal gas mixing in the tank and thereby limit the risk of hot spots occurring.

[0014] Modifying the flow path can lead to a change in the injection angle. This is advantageous because it is known that at the beginning of filling, when injection velocities are low, a limited injection angle prevents the gas jet from reaching the upper wall and causing a horizontal temperature gradient. Conversely, at the end of filling, a large injection angle improves the trajectory of the injected gas and limits vertical temperature gradients.

[0015] However, these injectors require a moving or deformable component in the pipe to modify the gas velocity at the injector outlet. A moving component presents a challenge to the assembly, maintenance, and reliability of a technical solution.

[0016] Thus, there appears a need to develop an injector for a pressurized gas reservoir, capable of producing a jet with an injection direction variable during tank filling. Furthermore, given the sizing constraints that limit the injector diameter, it must be able to operate without the need for an active actuator or moving part in the pipe.

[0017] To this end, according to a first aspect, the invention relates to an injector for a gas reservoir. The injector comprises a conduit extending along a main longitudinal axis and intended to fluidly connect a pressurized gas source and a reservoir.

[0018] In particular, the pipe includes an inlet port for receiving pressurized gas and an outlet port opening into the tank. Furthermore, the pipe defines two separate gas flow circuits between the inlet port and the outlet port: a first circuit for the flow of a first gas stream and a second circuit for the flow of a second gas stream.

[0019] According to this first aspect of the invention, the first circuit and the second circuit converge at the outlet. Furthermore, the first circuit and the second circuit are configured to impart to the first and second flows, respectively, a first and a second evacuation velocity. The first evacuation velocity is different from the second evacuation velocity.

[0020] Other embodiments of the invention include the following features: - the first circuit has a different geometry and / or structure than the second circuit, - the first circuit is equipped with a flow diverter, the second circuit is without a flow diverter, - The flow diverter includes one or more baffles, - the first circuit has a passage section greater than a section passing through the second circuit, - the circuits are defined on either side of a plane passing through the main longitudinal axis, - Each circuit comprises an inlet section located away from the outlet and an outlet section located near the outlet. - the evacuation sections of the circuits coincide with the outlet of the pipe. - Each circuit comprises a path parallel to the main longitudinal axis of the injector, - each circuit includes a path inclined relative to the main longitudinal axis, - the inclined paths of the circuits converge towards the outlet and each forms an angle of inclination with the main longitudinal axis, The pipe comprises a first end defining the inlet port and a second end defining the outlet port. The conduit includes a frustoconical internal portion near the outlet orifice, The pipe delimits a volume which is equipped with a separator, The separator is formed near the outlet orifice. The circuits are delimited by the pipe and the separator. The baffles of the first circuit are formed on the separator and / or on the inner wall of the pipe, The separator is an elongated flat body having a first characteristic dimension greater than a second characteristic dimension, and a third characteristic dimension smaller than the first characteristic dimension and greater than the second characteristic dimension. The first characteristic dimension is the length defined along a direction parallel to the main longitudinal axis. The second characteristic dimension is the thickness defined along a direction perpendicular to the main longitudinal axis, in a plane perpendicular to the main axis of the injector. The third characteristic dimension is the width defined along a second direction perpendicular to the main axis of the injector, in a plane parallel to the main longitudinal axis of the injector. The separator extends longitudinally within the volume delimited by the pipe. The separator extends between two opposite sides of the inner wall of the pipe, The separator divides the inner wall of the pipe into a first portion and a second portion. the separator passes through a median plane of the pipe containing the main longitudinal axis, The first and second portions of the inner wall of the pipe are symmetrical with respect to the median plane. The separator comprises a first face opposite the first portion of the inner wall of the pipe, The separator comprises a second face opposite the second portion of the inner wall of the pipe, The first circuit is delimited by the first portion of the inner wall of the pipe and the first face of the separator. - the second circuit is delimited by the second portion of the inner wall of the pipe and the second face of the separator, - the separator includes a beveled distal end located near the outlet orifice, - the separator includes a beveled proximal end located opposite the outlet orifice, - the truncated conical portion of the pipe and the beveled distal end of the separator define the inclined paths of the circuits, - the beveled proximal end of the separator and the conduit delineate the inlet sections of the circuits, - the inlet section of each circuit is wider than the outlet section of said circuit.

[0021] According to a second aspect, the invention relates to a reservoir comprising an opening for receiving the gas, and an injector according to any one of the embodiments described above. In particular, the injector is disposed in the opening of the reservoir.

[0022] Other features and advantages will become apparent from the description below, made with reference to the following figures in which:

[0023] [Fig. 1] is a view illustrating a tank equipped with a prior art injector.

[0024] [Fig.2] is a longitudinal sectional view illustrating an example of an injector According to the invention, the injector comprises a conduit defining two flow circuits between an inlet orifice and an outlet orifice.

[0025] [Fig.3] is a cross-sectional view illustrating the injector of [Fig.2].

[0026] Fig. 1 illustrates a reservoir 10 equipped with a prior art injector.

[0027] The reservoir 10 extends along a longitudinal main axis XI. Furthermore, the reservoir 10 comprises a first bottom and a second bottom between which a side wall extends. The first bottom includes an opening 30 provided with a mounting base 20 for the injector 1.

[0028] With reference to [Fig. 2], the injector 1 includes a conduit 2 for fluidly connecting a gas source to the reservoir 10 to be filled. The conduit 2 extends along a longitudinal main axis X2 which may be different from the main axis XI of the reservoir 10.

[0029] In particular, the conduit 2 is a hollow tube comprising an inner wall 21 which delimits a gas flow volume 22. In addition, the conduit 2 comprises at least one inlet port 23 for receiving a mass of gas from the gas source, and at least one outlet port 24 which opens into the reservoir 10. The gas flow volume 22 extends between the inlet port(s) 23 and the outlet port(s) 24.

[0030] In the illustrated example, the conduit 2 generally has a cylindrical shape. Furthermore, a single inlet port 23 opens into the conduit 2 parallel to the main axis X2. Similarly, a single outlet port 24 opens into the reservoir 10 parallel to the main axis X2.

[0031] Alternatively, the inlet port(s) 23 may open into the conduit 2 in a direction inclined relative to the main axis X2.

[0032] Still with reference to [Fig.2], the conduit 2 defines at least two distinct gas flow circuits 25, 26 between the inlet orifice(s) 23 and the outlet orifice(s) 24: a first circuit 25 intended for the flow of a first gas stream, and a second circuit 26 intended for the flow of a second gas stream.

[0033] In particular, the circuits 25, 26 are defined on either side of a plane parallel to the main longitudinal axis X2 of the injector 1. In the illustrated example, the circuits 25, 26 are defined on either side of a median plane containing the main longitudinal axis X2 of the injector 1.

[0034] In addition, circuits 25 and 26 each comprise an inlet section 25a and 26a, respectively the first inlet section 25a and the second inlet section 26a. Circuits 25 and 26 also each comprise an outlet section 25b and 26b, respectively the first outlet section 25b and the second outlet section 26b.

[0035] In the illustrated example, the circuits 25, 26 are defined on a distal portion 2A of the conduit 2, that is to say, a portion far from the inlet port 23. Thus, when a mass of gas is introduced at the inlet port 23, it travels through a proximal portion 2B of the conduit 2, that is to say, a portion located near the inlet port 23, before decomposing into a first flow and a second flow.

[0036] In an alternative not shown, the circuits 25, 26 can be defined along the entire length of the conduit 2. Thus, the inlet sections 25a, 26a of the circuits 25, 26 can coincide with the inlet port(s) 23 of the conduit 2.

[0037] It should be noted that the mass of gas admitted to the inlet port 23 has a first velocity, called the inlet velocity. The mass of gas exiting the outlet port 24 has a second velocity, called the outlet velocity (or injection velocity). Furthermore, the flow entering a circuit 25, 26 has a first velocity at the inlet section 25a, 26a, called the inlet velocity. The flow exiting a circuit 25, 26 has a second velocity at the outlet section 25b, 26b, called the outlet velocity.

[0038] It should also be noted that the pressure loss through a given circuit 25, 26 of the conduit 2 is directly related to the structure and / or geometry of the circuit 25, 26 under consideration. Furthermore, the pressure loss through a given circuit 25, 26 is proportional to the square of the inlet velocity defined at the inlet port 23 of the pipe 2.

[0039] Depending on the inlet velocity defined at the inlet port 23, and depending on the pressure loss through a circuit 25, 26, the mass of gas admitted at the inlet port 23 will be distributed differently in the circuits 25 and 26 considered.

[0040] A different distribution of the mass of gas admitted to the orifice 23 will result in differences in inlet velocities 25a and 26a between the circuits 25 and 26. The difference in inlet velocities 25a and 26a will in turn result in a difference in outlet velocities 25b, 26b.

[0041] According to the invention, the first circuit 25 and the second circuit 26 converge at the outlet port 24. Furthermore, the first circuit 25 and the second circuit 26 are configured to impart to the first and second flows, respectively, a first and a second evacuation velocity. The first evacuation velocity differs from the second evacuation velocity.

[0042] In the illustrated example, the first circuit 25 is configured to give the first flow through it a lower evacuation velocity than that of the second flow through the second circuit 26.

[0043] The convergence of the circuits 25, 26 towards the outlet orifice 24 means here that at least one of the circuits 25, 26 has a first path 25d, 26d which is inclined with respect to the main axis X2 of the injector 1. This first path 25d, 26d has an axis Yl, Y2 of inclination which defines with the main axis X2 of the injector 1 an angle al, a2, called the angle of inclination.

[0044] Furthermore, the convergence of the circuits 25, 26 towards the outlet orifice 24 means here that the first and second flows form a single jet at the outlet orifice 24. This single jet has an injection velocity that is a resultant of the evacuation velocities of the flows at the discharge sections 25b, 26b.

[0045] In the illustrated example, the two circuits 25, 26 each have a first path 25d, 26d inclined with respect to the principal axis X2 of the injector 1. Thus, the respective inclination angles a1 and a2 of these paths 25d, 26d are not negative. Furthermore, the circuits 25, 26, and in particular the inclined paths 25d, 26d, are symmetrical with respect to the principal axis X2 of the injector 1. Thus, the inclination angles a1 and a2 of these paths 25d, 26d are equal in absolute value.

[0046] In an alternative not shown, the circuits 25, 26, and in particular the inclined paths 25d, 26d, may be asymmetric with respect to the main axis X2 of the injector 1. The angles al, a2 of inclination of these paths 25d, 26d will therefore be different.

[0047] It should be noted that each circuit 25, 26 may advantageously include a second path 25c, 26c which extends parallel to the main axis X2 of injector 1. This second path 25c, 26c is located upstream of the first inclined path 25d, 26d.

[0048] In the illustrated example, the respective second paths 25c, 26c of the circuits 25, 26 are parallel to each other and symmetrical with respect to the main axis X2 of the injector 1.

[0049] As previously stated, the first discharge velocity of the first flow at the first discharge section 25b differs from the second discharge velocity of the second flow at the second discharge section 26b. This difference in discharge velocities arises from the difference in pressure drop between the first circuit 25 and the second circuit 26.

[0050] Since the pressure loss through a circuit 25, 26 is directly related to its structure and / or geometry, a difference in pressure loss between the first circuit 25 and the second circuit 26 implies a structural and / or geometric difference between these two circuits 25, 26.

[0051] Thus, in order to give the flows which pass through them respectively different pressure losses and different evacuation velocities, the circuits 25, 26 have one or more different geometric and / or structural characteristics in relation to each other.

[0052] In particular, one of the circuits 25, 26, here the first circuit 25, may be provided with a flow diverter 3; while the other of the circuits 25, 26, here the second circuit 26, is devoid of such a diverter 3.

[0053] In the illustrated example, the diverter 3 comprises one or more chicanes arranged in the first circuit 25.

[0054] In an alternative not shown, one of the circuits 25, 26 may have a larger passage cross-section than the other of the circuits 25, 26. A relatively large passage cross-section for a circuit 25, 26 induces a greater pressure loss on the flow passing through it and therefore a lower evacuation velocity.

[0055] It should be noted that the entry velocity of the flows into the circuits 25, 26 of the injector 1 varies during the filling of the tank 10, going from a relatively low level at the beginning of filling to a relatively high level at the end of filling.

[0056] Due to this variation in the inlet velocity of the flows, the invention makes it possible to also vary, during filling, the difference between the respective discharge velocities of these flows at discharge sections 25b and 26b. Consequently, the invention makes it possible to vary the injection angle of the jet resulting from the mixing of the first and second flows.

[0057] In the illustrated example, the first circuit 25 is positioned above the second circuit 26. In addition, the inclined path 25d of the first circuit 25 is directed towards the lower wall of the tank 10, while the inclined path 26d of the second circuit 26 is directed towards the upper wall of the tank 10. The first flow (directed towards the lower wall of the tank 10) cooperates with the second flow (directed towards the upper wall of the tank 10) to define the angle of inclination of the jet resulting from these flows.

[0058] At the beginning of filling, due to a relatively low inlet velocity of the flows, and due to the limited pressure losses across circuits 25, 26, the respective discharge velocities of the flows are close. The radial components of these discharge velocities are then opposite and balance each other.

[0059] The resulting jet of the flows therefore exhibits a velocity having essentially an axial component. In other words, the resulting jet of the flows has an injection direction that is substantially coincident with the principal axis X2 of the injector 1. The injection angle is then close to zero.

[0060] At the end of filling, due to a relatively high inlet velocity at the inlet sections of circuits 25, 26, and due to the specific structure and / or geometry of the first circuit 25 compared to the second circuit 26, the flow of the first flux through the first circuit 25 is greatly affected.

[0061] The pressure loss through this circuit 25 is then greater, resulting in a lower evacuation velocity at the first evacuation section 25b.

[0062] The first flow (directed towards the lower wall of the tank 10) cooperates with the second flow (directed towards the upper wall of the tank 10) to give the resulting jet an injection direction that deviates from the main axis X2 of the injector 1.

[0063] The injection angle of the jet resulting from the flows is therefore non-zero. Advantageously, this injection angle is such that the jet does not reach the upper wall of the reservoir 10, thus limiting the risk of the appearance of a horizontal thermal gradient.

[0064] A filling simulation was carried out on a tank 10 equipped with the injector 1 according to the invention. For an inlet velocity of the flows varying from 0.5 m / s to 2 m / s at the respective inlet sections 25a, 26a of the circuits 25, 26, a variation in the injection angle of 8°C to 15°C was observed on the jet resulting from these flows.

[0065] It should be noted that when the evacuation velocity of the first flow which passes through the first circuit 25 becomes negligible compared to that of the second flow which passes through the second circuit 26, the injection direction of the jet resulting from these two flows coincides with the Y2 axis of inclination of the second circuit 26. The injection angle of the resulting jet then becomes substantially equal to the angle a2 of inclination of the second circuit 26.

[0066] Advantageously, the conduit 2 is provided with a separator 4 disposed in the volume 22 delimited by the internal wall 21 of the conduit 2. The conduit 2 and the separator 4 delimit the first circuit 25 and the second circuit 26.

[0067] In more detail, the separator 4 is formed near the outlet orifice 24 at the distal portion 2A of the conduit 2. Furthermore, as illustrated in [Fig.3], the separator 4 extends between two opposite sides of the inner wall 21 of the conduit 2. Thus, the separator 4 divides the inner wall 21 of the conduit 2 into a first portion 21a and a second portion 21b.

[0068] In the illustrated example, the first portion 21a and the second portion 21b of the internal wall 21 of the conduit 2 are equal and symmetrical.

[0069] Furthermore, the separator 4 is an elongated flat body that extends longitudinally in the conduit 2 parallel to the main axis X2 of the injector 1. Thus, the separator 4 has a first characteristic dimension that is larger than its second characteristic dimension. The separator 4 also has a third characteristic dimension that is smaller than its first characteristic dimension and larger than its second characteristic dimension.

[0070] The first characteristic dimension is the length defined along a direction parallel to the main axis X2 of the injector 1. The second characteristic dimension is the thickness defined along a first direction perpendicular to the main axis X2 of the injector 1, in a plane perpendicular to the main axis X2 of the injector 1. The third characteristic dimension is the width defined along a second direction perpendicular to the main axis X2 of the injector 1, in a plane parallel to the main axis X2 of the injector 1.

[0071] As better illustrated in [Fig. 3], the separator 4 has a first face 41 opposite the first portion 21a of the inner wall 21 of the pipe 2. The separator 4 also has a second face 42 opposite the second portion 21b of the inner wall 21 of the pipe 2. The first face 41 of the separator 4 and the first portion 21a of the inner wall 21 of the pipe 2 delimit the first circuit 25. The second face 42 of the separator 4 and the second portion 21b of the inner wall 21 of the pipe 2 delimit the second circuit 26.

[0072] With reference to [Fig. 3], the inner wall 21 of the conduit 2 has a frustoconical portion 21c located near the outlet orifice 24. Similarly, the separator 4 includes a beveled distal end 43 located near the outlet orifice 24. Here, the distal end 43 of the separator 4 is beveled on both faces 41, 42 of the separator 4. Thus, the frustoconical inner portion 21c of the conduit 2 and the beveled distal end 43 of the separator 4 delimit the inclined paths 25d, 26d of the circuits 25, 26.

[0073] Advantageously, the separator 4 has a proximal end 44 which is beveled, and this on both faces 41, 42 of the separator 4. The proximal end 44 of the separator 4 is located far from the outlet orifice 24.

[0074] In particular, the proximal end 44 of the separator 4 and the conduit 2 delimit the inlet sections 25a, 26a of the circuits 25, 26. The inlet section 25a, 26a of each circuit 25, 26 is wider than the outlet section 25b, 26d of the circuit 25, 26 under consideration.

[0075] When one of the circuits 25, 26 is provided with baffles, these can be arranged on the separator 4 and / or on the conduit 2. In the illustrated example, a first baffle is arranged on the first face 41 of the separator 4. A second baffle is arranged on the inner wall 21 of the conduit 2. The two baffles are longitudinally spaced so that after passing through the inlet section 25a, the first flow is diverted once by the first baffle and then a second time by the second baffle.

[0076] These successive deviations of the first flow contribute to limiting its evacuation speed to the first 25b evacuation section.

Claims

Demands

1. An injector (1) for a gas reservoir (10), the injector (1) comprising a conduit (2) extending along a longitudinal principal axis (X2) and intended to fluidly connect a pressurized gas source and a reservoir (10), the conduit (2) comprising an inlet port (23) for receiving the pressurized gas and an outlet port (24) opening into the reservoir (10), the conduit (2) defining two distinct gas flow circuits (25, 26) between the inlet port (23) and the outlet port (24): a first circuit (25) for the flow of a first gas stream and a second circuit (26) for the flow of a second gas stream, characterized in that the first circuit (25) and the second circuit (26) converge at the outlet port (24) and are configured to impart, respectively, to the first and second streams a first evacuation speed and a second evacuation speed,the first evacuation speed being different from the second evacuation speed.

2. Injector (1) according to the preceding claim, wherein the first circuit (25) has a geometry and / or structure different from those of the second circuit (26).

3. Injector (1) according to any one of claims 1 or 2, wherein the first circuit (25) is provided with a flow diverter (3), the second circuit (26) being devoid of a flow diverter (3).

4. Injector (1) according to the preceding claim, wherein the flow diverter (3) comprises one or more baffles.

5. Injector (1) according to any one of claims 1 or 2, wherein the first circuit (25) has a passage section greater than a passage section of the second circuit (26).

6. Injector (1) according to any one of the preceding claims, wherein the circuits (25, 26) are defined on either side of a plane passing through the longitudinal principal axis (X2).

7. Injector (1) according to any one of the preceding claims, wherein the circuits (25, 26) each comprise an inlet section (25a, 26a) located away from the outlet orifice (24) and an outlet section (25b, 26b) located near the outlet orifice (24).

8. Injector (1) according to claim 7, wherein the discharge sections (25b, 26b) of the circuits (25, 26) coincide with the outlet orifice (24) of the pipe (2).

9. Injector (1) according to any one of the preceding claims, wherein the circuits (25, 26) each comprise a path (25c, 26c) parallel to the longitudinal principal axis (X2) of the injector and a path (25d, 26d) inclined with respect to the longitudinal principal axis (X2).

10. Injector (1) according to the preceding claim, wherein the inclined paths (25d, 26d) of the circuits (25, 26) converge towards the outlet orifice (24) and each form with the longitudinal principal axis (X2) an angle (al, a2) of inclination.

11. Injector (1) according to any one of the preceding claims, wherein the conduit (2) comprises an internal frustoconical portion (21c) located near the outlet orifice (24).

12. Injector (1) according to any one of the preceding claims, in which the conduit (2) delimits a volume (22) which is provided with a separator (4), the separator being formed near the outlet orifice (24), the circuits (25, 26) being delimited by the conduit (2) and the separator (4).

13. Injector (1) according to the preceding claim in combination with claim 4, wherein the baffles of the first circuit (25) are formed on the separator (4) and / or on an internal wall (21) of the conduit (2).

14. Injector (1) according to any one of claims 12 or 13, wherein the separator (4) comprises a beveled distal end (43) situated near the outlet orifice (24).

15. Injector (1) according to the preceding claim in combination with claims 9 and 11, wherein the frustoconical portion (21c) of the conduit (2) and the beveled distal end 43 of the separator (4) delimit the inclined paths (25d, 26d) of the circuits (25, 26).

16. Tank (10) comprising an orifice for receiving gas for filling and an injector (1) according to any one of claims 1 to 14, the injector (1) being disposed at the orifice.

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