Filling head enabling reliable replenishment without splashing

Abstract

A filling head (13) comprising a main body (15) including a main portion (17) closed by a cover portion so as to form a cavity in which a separating device (21) is received, wherein an upper end (21A) of the separating device (21) facing the cover portion of the main body (15) is provided with at least one notch (22), and when a dispensing nozzle is received in the separating device (21), a pressure balance within the filling head (13) is maintained, and the possibility of fluid flowing back from the nozzle during automatic stopping of the nozzle is restricted from the filling head (13).

Description

Technical Field

[0001] The present invention relates to a filling head for a liquid tank such as an automobile tank, which uses a nozzle (automatic or non-automatic) to enable reliable filling without liquid splashing, that is, without backflow of liquid from the filling head during the filling stage.

Background Art

[0002] Laws regarding automotive and truck exhaust gases particularly regulate the reduction of nitrogen oxide NOx emissions into the atmosphere. One known method to achieve this is to use the "SCR" (abbreviation for "Selective Catalytic Reduction") process. In this process, nitrogen oxides can be reduced by injecting a reducing agent such as ammonia into the exhaust line. Generally, an SCR system includes a tank for storing an aqueous additive such as urea solution, a pump for transporting the aqueous additive in a supply line, and a device for metering a desired amount of the aqueous additive and injecting it into the exhaust line. Therefore, the aqueous additive is accurately metered, injected into the exhaust gas stream, hydrolyzed there, and then nitrogen oxides (NO x ) are converted to nitrogen (N2) and water (H2O).

[0003] In trucks, the supply of aqueous urea, also called AdBlue (registered trademark), has been carried out for many years. Since tank capacity is important in trucks, a supply system with a filling rate of 40 liters per minute (ISO222-41-4 standard) has been developed separately from the fuel supply. Furthermore, the urea tank of a truck has a large inlet diameter that enables high ventilation capacity.

[0004] Regarding passenger cars, the initial market requirement was the design of a filling head that could accommodate manual filling with a screw-on bottle. The filling was done by gravity and was typically at a low speed of about 3 liters per minute (ISO222-41-5 standard). However, due to the stricter pollution removal standards, the consumption of urea water has increased, so it has become common to replenish the urea water tank regularly. Furthermore, consumers have noticed that dispensers for trucks are already available, and an independent supply rate different from what was expected has been imposed.

[0005] As a result, automobile manufacturers are demanding the design of an SCR system that can handle both automatic filling technology, initially designed for heavy-duty applications, and manual filling. Examples of filling heads are disclosed in International Publication No. 2019 / 149750 and International Publication No. 2021 / 152071.

[0006] Furthermore, currently, mainly three types of automatic filling technologies are being used according to the sensors included in the nozzle (ZVA nozzle sensor, horn nozzle sensor, or PIUSI nozzle sensor). Each sensor can be attached not at the tip of the nozzle (like the ZVA nozzle) but at a position up to 16 mm from the tip in the upstream direction of the nozzle (like the horn nozzle sensor and PIUSI nozzle sensor).

[0007] Therefore, regardless of the type of sensor used in the nozzle, it is necessary to meet many conflicting specifications, such as the small diameter of the existing screw-on bottle and high-speed filling of up to 40 liters per minute.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Summary of the Invention

[0009] The object of the present invention is to provide a filling head that avoids ejection from the filling head before and during interruption of the automatic stop nozzle and enables more rapid detection by the automatic stop sensor of the replenishment nozzle.

[0010] Accordingly, an object of the present invention is a filling head for a storage system comprising a body including a main part closed by a cover part so as to form a cavity in which a separating device is received, the filling head being configured to receive a fluid distribution nozzle provided with an automatic stop sensor for preventing overfilling of the filling head within a cylindrical wall of the separating device extending around the filling direction, the filling head being configured to be connected to a filling line and a ventilation line of a fluid tank, the separating device being configured to improve the splitting of the flow coming from the ventilation line and the flow towards the filling line, an upper end facing the cover part of the body of the separating device including at least one notch for improving the pressure balance within the filling head when the nozzle is received within the cylindrical wall of the separating device, and it being ensured that the possibility of the fluid flowing out of the nozzle flowing back from the filling head is limited while the automatic stop nozzle is blocked.

[0011] According to the present invention, with the help of each notch, the fluid circulation between the internal volume and the external volume of the cylindrical wall is improved, a suction effect of the fluid near the tip of the nozzle is locally generated, and it is possible to avoid a decrease in the pressure acting on the region between the upper end and the cover part, which can become high enough for the fluid to be discharged from the filling head.

[0012] The present invention may include one or more of any of the following features, alone or in combination.

[0013] The upper end of the separating device may be an annular wall, and at least one notch may form a through passage within the thickness of the annular wall, and by locally increasing the gap between the upper end and the cover part, the fluid communication between the internal volume and the external volume of the cylindrical wall can be improved.

[0014] The buffer volume part can be connected to the ventilation line and configured to reduce the flow rate from the ventilation line. The buffer volume part can be integrally formed with the main part in the lateral direction. The common wall of the main part and the buffer volume part can be provided with an opening through which the flow from the ventilation line into the cavity of the main body passes. This configuration enables further improvement with respect to the purpose of avoiding splashing from the filling head. Therefore, regardless of the volume and replenishment rate of the tank, the flow rate from the ventilation line is further reduced, and the bubbles along the wall of the buffer volume part are more likely to burst.

[0015] The cylindrical wall is provided with at least one hole at the upper end of the separation device, enabling the fluid flow coming from the ventilation line to pass through the cylindrical wall and be discharged outside the filling head. At least four flanges preferably project laterally from the outer surface of the cylindrical wall and are attached to surround the opening of the buffer volume part, forming channels towards at least one hole, which can improve the division between the flow from the ventilation line and the flow towards the filling line. Therefore, when coming out of the opening, the flow from the ventilation line can communicate substantially only with at least one hole 31 at the upstream level as seen from the filling flow direction.

[0016] The cover part can be provided with a protruding guide element for guiding the dispensing nozzle to the separation device. When the nozzle is not received in the separation device, the protruding guide element can be closed in a sealed state by a cap.

[0017] The inner surface of the protruding guide element has at least one groove, and when the nozzle is received in the protruding guide element, the flow from the ventilation line is discharged outside the filling head through at least one groove.

[0018] The lower end facing the main part of the main body of the separation device is provided with a fixing element attached to the outer surface of the cylindrical wall, and this fixing element cooperates with the inner wall of the main part protruding into the cavity to fix the separation device in the cavity as an extension of the inner wall.

[0019] The fixed element and the inner wall may have complementary shapes that limit the possibility of fluid flow between the lower end of the separation device and the inner wall of the main body. With this configuration, a labyrinth shape is formed between the bottom of the filling head and the separation device.

[0020] The inner wall is at least partially annular, and the fixed element has a hook shape for grasping the free end of the inner wall. Since the sensor can detect the fluid in the filling head faster, the automatic stop nozzle shut-off function has been greatly improved.

[0021] Another object of the present invention is a storage system including a fluid tank connected to a filling line configured to guide the gravitational flow of fluid from the filling head to the tank, and a ventilation line configured to compensate for pressure fluctuations in the tank, wherein the filling head is any one of the above-described embodiments.

Brief Description of the Drawings

[0022] Other features and advantages of the present invention will become more clearly apparent by reading the following detailed description provided as a non-limiting explanation with reference to the accompanying drawings.

[0023]

Figure 1

Figure 2

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Figure 8

DETAILED DESCRIPTION OF THE INVENTION

[0024] In the various figures, the same or similar elements are given the same reference numerals and are indexed where necessary. Accordingly, the description of their structure and function is not systematically repeated.

[0025] Hereinafter, the directions are the normal directions of the drawings. In particular, the terms “upper”, “lower”, “left” and “right” are arranged above, below, left and right with respect to the viewing point of the drawings. Further, the terms “upstream” and “downstream” generally relate to the relative position of one element to another element with respect to the filling flow direction F.

[0026] It should be understood that the terms used herein are interchangeable in appropriate situations and that the embodiments of the invention described herein are operable in directions other than those described or illustrated herein.

[0027] It should be noted that the term “comprising” used in the claims should not be construed as being limited to the means listed thereafter and does not exclude other elements or steps. Accordingly, this is construed as identifying the presence of the recited features, integers, steps, or components, but does not exclude the presence or addition of one or more other features, integers, steps, or components, or groups thereof. Accordingly, the scope of the expression “a device including means A and B” should not be limited to a device consisting only of components A and B. This means, with respect to the present invention, that the relevant components of the device are only A and B.

[0028] The term "tank" is understood to mean an impermeable tank capable of storing fluids such as fuel, aqueous urea solution, and water under a variety of environmental and usage conditions. Examples include a fuel tank for supplying fuel (such as gasoline, diesel, hydrogen, etc.) to a vehicle, an aqueous urea solution tank for injection into an exhaust device, or a water tank for supplying water to a vehicle.

[0029] The expression "SCR system" is understood to mean a system for catalytically reducing NO from the exhaust gas of an internal combustion engine of a vehicle 41, preferably using an aqueous urea solution as a liquid additive. x The present invention is advantageously applicable to diesel engines, particularly diesel engines of passenger cars or large trucks.

[0030] Furthermore, in the present invention, the urea dispensing nozzle 10 can be introduced into the filling head 13. Therefore, a valve for the dispensing nozzle 10 actuated by a magnetic field has been developed. Therefore, when applied to a urea tank, the filling head 13 must have a magnetic element for actuating the valve to enable the supply of the aqueous urea solution.

[0031] Numerous specific details are set forth in this specification. However, it is understood that embodiments of the present invention may be practiced without these specific details. In other instances, well-known methods, structures, and technologies have not been shown in detail so as not to obscure the understanding of this description.

[0032] As shown in FIG. 1, the present invention relates to a vehicle 41 having a powertrain 43 connected to a pollution removal system 45. More precisely, the pollution removal system 45 includes an exhaust device 47 and an additive injection device 49, such as an aqueous urea solution, within the exhaust device 47.

[0033] The injection device 49 comprises a storage system 1 including a tank 3 for storing an aqueous additive. The injection device 49 may or may not include a plurality of sensors immersed in the aqueous additive, such as level sensors, temperature sensors, and / or high-quality sensors that can be of the capacitive effect type, ultrasonic type, or mechanical type.

[0034] The injection device 49 also comprises a pump 5 associated with an injection element 7, and these are managed by a processing device connected to the central computer of the vehicle 41. The processing device includes a memory in which coded instructions are stored. When the coded instructions encoded by the processing device are executed, for example, steps of the SCR process are executed.

[0035] The tank 3 needs to be periodically replenished with an aqueous additive such as aqueous urea or aqueous ammonia. Therefore, the storage system 1 comprises a filling line 9, a vent line 11 (also called a return line), and a filling head 13. The filling line 9 is configured to direct the gravitational flow of fluid from the filling head 13 to the tank 3. The vent line 11 is configured to compensate for pressure fluctuations in the tank 3 during replenishment by discharging the fluid (mainly air and ultimately the vapor of the liquid contained in the tank 3) in the tank 3 compressed by the fluid flowing into the tank 3 from the filling line 9 from the filling head 13.

[0036] Finally, the filling head 13 is configured to receive the nozzle 10 (shown in FIG. 5) of the fluid distribution system and is connected to the filling line 9 and the vent line 11 in a sealed state with respect to any type of fluid (such as air and aqueous additive) intended to be present in the tank 3. Thus, during the replenishment period, the filling head 13 enables the fluid discharged from the nozzle 10 to flow into the tank 3 via the filling line 9, and at the same time, enables the fluid present above the liquid in the tank 3 to be discharged from the tank 3 through the filling head 13 via the vent line 11 and escape to the atmosphere (external atmosphere) around the vehicle 41.

[0037] The object of the present invention is to provide a new filling system for a fluid tank 3 that can withstand a wide range of filling speeds regardless of the volume of the tank 3. More specifically, the present invention relates to the optimization of the filling head 13 that prevents the aqueous additive from splashing from the filling head 13 before and during the shut-off of the automatic stop nozzle 10 and enables faster detection of the automatic stop sensor of the replenishment nozzle 10.

[0038] Accordingly, the object of the present invention is a filling head 13 provided with a main body 15 that is inclined and attached at a predetermined angle with respect to the direction of gravity within the vehicle 41. According to the present invention, the predetermined angle can be in the range of 0° to 60° considering the direction of gravity. This angle range enables a good flow with the help of gravity and allows the dispensing nozzle 10 to be easily introduced into the filling head 13.

[0039] The filling head 13 includes a main portion 17 closed by a cover portion 19 so as to form a cavity 20. According to a first example, the cover portion 19 can be fixed to the main portion 17 in a sealed state by welding. In this way, unique welding is used during the manufacturing process, enabling improvement of the cycle time and related costs.

[0040] According to a second example, the cover portion 19 can be fixed to the main portion 17 in a sealed state by snap-fitting a seal ring 24 between the cover portion 19 and the main portion 17. Thereby, the welding process can be omitted in the manufacturing process, the process becomes simple, and the cover portion 19 can be easily removed for the aftermarket.

[0041] The cover portion 19 may include a protruding guide element 18 for guiding the dispensing nozzle 10 to a separating device 21 (described below), thereby improving the mechanical protection of the cylindrical wall 23 of the dispensing nozzle 10. Preferably, the protruding guide element 18 is closed in a sealed state by screwing in a cap (not shown) when the nozzle 10 is not received in the separating device 21.

[0042] As shown in FIGS. 5 and 7, when the tank 3 is of the urea type capable of supplying urea solution, the cover part 19 includes a magnet 16 around the protruding guide element 18, and the valve of the nozzle 10 can be actuated by a magnetic field.

[0043] Furthermore, when the nozzle 10 is received by the protruding guide element 18, the inner surface of the protruding guide element 18 has at least one groove 18A so that the flow V coming from the ventilation line 11 is discharged to the outside of the filling head 13 through at least one groove 18A.

[0044] The main part 17 may include a plurality of ribs 17B (four ribs 17B can be seen in FIG. 6) so as to receive the separating device 21 at the upper ends of the respective ribs 17B (which abut against the lower surface of the lower flange 29). Thereby, the separating device 21 can be easily removed from the cavity 20 for replacement. The separating device 21 can be replaced with a different shape so as to fit another type or dimension of the nozzle 10 and / or the tank 3.

[0045] The filling head 13 may further include a buffer volume part 12 integrated with the main part 17 in order to reduce the speed of the flow V coming from the ventilation line 11. With this configuration, further improvement is possible with respect to the purpose of avoiding splashing from the filling head 13. Depending on the type of sensor, the buffer volume part 12 is between 80 ml and 140 ml, preferably between 90 ml and 130 ml, and more preferably between 94 ml and 129 ml. More precisely, the buffer volume part 12 becomes larger as the sensor of the nozzle is more upstream when considering the filling direction F.

[0046] Specifically, the buffer volume portion 12 is connected to the ventilation line 11 and is configured to reduce the velocity of the flow V coming from the ventilation line 11. Thus, in the exemplary embodiments of FIGS. 2 to 8, the buffer volume portion 12 is integrally formed with the main portion 17 in the lateral direction. The common wall of the main portion 17 and the buffer volume portion 12 is provided with an opening 26 that allows the flow V flowing from the ventilation line 11 into the cavity 20 of the main body 15 to pass through. In particular, as can be seen from FIGS. 5, 7, and 8, the opening 26 is as high as possible within the buffer volume portion, promoting a smooth flow V to the upper part of the filling head 13.

[0047] Therefore, the buffer volume portion 12 can be arranged as far as possible from the tank 3. Advantageously, regardless of the volume and / or replenishment rate of the tank 3, the velocity of the flow V coming from the ventilation line 11 is better reduced, and the bubbles along the wall of the buffer volume portion 12 burst better. Further, with the help of the separation device 21, the flows F and V are more appropriately divided within the cavity 20 between the flow F of the fluid flowing out of the nozzle 10 and the flow V of the fluid flowing into the ventilation line 11 within the main body 15, avoiding the operation of the automatic stop function of the dispensing nozzle until the tank 3 is substantially full.

[0048] According to the present invention, the separation device 21 is preferably suspended within the cavity 20 of the main body 15 and is configured to receive the dispensing nozzle 10 within a cylindrical wall 21C extending around the filling direction F as shown in the embodiment of FIG. 5. The separation device 21 is arranged to improve the division between the flow V coming from the ventilation line 11 and the flow F towards the filling line 9. Thus, as shown in FIG. 5, the sensor attached to the tip of the nozzle 10 is within the plane I (ZVA nozzle sensor) when the nozzle 10 is in contact with the inner rib 21D of the cylindrical wall 21C. All the technical effects and results of the present invention can be advantageously applied even when the sensors (horn nozzle sensor and PIUSI nozzle sensor) are arranged upstream of the nozzle 10 (even when they are 16 mm away from the tip of the nozzle 10) when considering the filling direction F.

[0049] According to a first aspect of the present invention, the separation device 21 includes an upper end 21A facing the cover portion 19 of the main body 15. When the nozzle 10 is received in the cylindrical wall 21C of the separation device 21, this upper end 21A improves the pressure balance in the filling head 13 and ensures that the fluid flowing out from the nozzle 10 is restricted from flowing backward from the filling head 13 while the automatic stop nozzle 10 is blocked. In fact, it has been observed that the internal pressure of the cylindrical wall 21C rises rapidly at the moment when the automatic stop nozzle 10 stops. With the help of the notch 22, the circulation of the fluid between the internal volume and the external volume of the cylindrical wall 21C is improved, avoiding the application of a low pressure in the region between the upper end 21A and the cover portion 19, and locally generating a suction effect of the additive solution near the tip of the nozzle 10, preventing the additive solution from being discharged from the filling head 13.

[0050] In the embodiments of FIGS. 3 to 4, the upper end 21A of the separation device 21 is an annular wall 28, and each notch 22 (three in FIGS. 3 to 4) forms a through passage with respect to the thickness T of the annular wall, and by locally increasing the gap between the upper end 21A and the cover portion 19, the fluid communication between the internal volume and the external volume of the cylindrical wall 21C can be made better. In the embodiment of FIG. 3, it can be seen that the three notches 22 are present along the entire height H of the annular wall 28 up to the upper flange 23A. Further, the notches 22 are regularly distributed at an angle of about 120 degrees around the direction of the filling flow F, and by leaving the annular wall 28 at an angle α of about 60 degrees around the direction of the filling flow F, the pressure balance between the internal volume and the external volume of the cylindrical wall 21C is improved.

[0051] According to a second aspect of the present invention, the cylindrical wall 21C includes at least one hole 31 at the upper end 21A of the separation device 21 downstream of the upper flange 23A, enabling the fluid flow V coming from the ventilation line 11 to pass through the cylindrical wall 21C as close as possible to the cover portion 19. As can be seen from the embodiments of FIGS. 5 and 7, the fluid flow V coming from the ventilation line 11 (via the buffer volume portion 12) passes through the cylindrical wall 21C as far as possible from the tip of the nozzle 10 (plane I) and is discharged outside the filling head 13.

[0052] Furthermore, at least four flanges 23A, 23B, 23C, 23D (two horizontal flanges 23A, 23B and two vertical flanges 23C, 23D) project laterally from the outer surface of the cylindrical wall 21C and are attached so as to surround the opening 26 of the buffer volume portion 12, forming a channel 27 leading to at least one hole 31, which enables improving the division between the flow V coming from the ventilation line 11 and the flow F going towards the filling line 9. Thus, when coming out of the opening 26, the flow V coming from the ventilation line 11 via the buffer volume portion 12 can be substantially in communication only with at least one hole 31 at an upstream level as seen from the direction of the filling flow F. As better shown in FIG. 8, the channel 27 communicates with the level of the hole 31 whose bottom is formed by the shield flange 25. Also, it can be seen that the length L of the opening 26 is substantially equal to the lengths of the buffer volume portion 12 and the channel 27. This configuration ensures a laminar flow F of the fluid flowing out from the nozzle 10 towards the filling line 9 within the body 15 and a direct ventilation V of the fluid coming from the ventilation line 11 through the cylindrical wall 21C via the buffer volume portion 12. Thus, this configuration can also limit the interruption / failure of the fluid distribution during the replenishment stage.

[0053] According to a third aspect of the present invention, the shield flange 25 projecting laterally from the outer surface of the cylindrical wall 21C is attached within the cavity 20 on the upstream side of the sensor of the nozzle 10 (when received within the cylindrical wall 21C) when considering the direction of the filling flow F. This configuration of the shield flange 25 limits the possibility of the fluid flowing out from the nozzle 10 at the filling head 13 flowing back from the filling head 13 without affecting the operation of the sensor.

[0054] Therefore, when considering the direction of the filling flow F, a dead volume is formed within the cavity 20 between the shield flange 25 and the lower flange 29 downstream of the level of the holes 31 to receive the fluid that finally passes through before reaching the upper end 21A of the separation device 21. In other words, the dead volume forms an additional volume for finally storing the fluid decelerated by contact with the lower flange 29 in order to avoid ejection from the filling head 13 before and during the stoppage of the automatic stop nozzle 10.

[0055] The shield flange 25 of the separation device 21 covers substantially the entire horizontal portion at the bottom of the holes 31, and the lower flange 29 covers substantially the entire horizontal portion of the cavity 20 (downstream of the lower horizontal flange 23B when considering the direction of the filling flow F). With this configuration, a shield can be formed over substantially the entire upper surface of the fluid present within the filling head 13. In other words, it becomes difficult for the fluid to reach the dead volume above the lower flange 29 and further above the shield flange 25. It can also be seen that the lower portion of the lower flange 29 is substantially within the plane I at the tip of the nozzle 10.

[0056] According to a fourth aspect of the present invention, the lower end 21B of the separation device 21 facing the main part 17 of the main body 15 is provided with a fixing element 21E attached to the outer surface of the cylindrical wall 21C. The fixing element is configured to cooperate with the inner wall 17A of the main part 17 protruding into the cavity 20 to fix the separation device 21 within the cavity 20 as an extension of the inner wall 17A. This fixing function is complementary to the fixing function obtained by bringing the lower surface of the lower flange 29 into contact with the upper ends of the respective ribs 17B.

[0057] In the embodiments of FIGS. 5 to 7, the fixing element 21E and the inner wall 17A have complementary shapes, restricting the possibility of fluid flow between the lower end 21B of the separating device 21 and the inner wall 17A of the main part 17. Specifically, the inner wall 17A is at least partially annular, and the fixing element 21E has a hook shape that grasps the free end of the inner wall 17A. Thus, the sensor can more rapidly detect the fluid within the filling head 13, significantly improving the shut-off of the automatic stop nozzle 10. With this configuration, a labyrinth shape is formed between the bottom of the filling head 13 and the separating device 21.

[0058] Of course, the present invention is not limited to the embodiments and variations presented herein, and as will be apparent to those skilled in the art, various other embodiments and / or variations may also be applicable. Thus, in some of the embodiments described herein, some features included in other embodiments are included, while other features are not included, and also, combinations of features from different embodiments are within the scope of the present invention and are intended to form different embodiments, as will be understood by those skilled in the art.

[0059] In particular, due to the function of the type of tank 3, it is possible to change the shape and / or dimensions according to specific applications.

Explanation of Reference Numerals

[0060] 1 Storage system 3 Tank 5 Pump 7 Injection element 9 Filling line 10 Distribution nozzle 11 Exhaust line 12 Buffer volume section 13 Filling head 15 Body 16 Magnet 17 Main part 17A Inner wall 17B Rib 18 Protruding guide element 18A Groove 19 Cover part 20 cavity 21 Separation device 21A Upper end 21B Lower end 21C Cylindrical wall 21D Inner rib 21E Fixing element 22 Notch 23A, 23B, 23C, 23D Flange 24 Seal ring 25 Shield flange 26 Opening 27 Channel 28 Annular wall 29 Lower flange 31 Hole 41 Vehicle 43 Power train 45 Pollution removal system 47 Exhaust device 49 Injection device

Claims

1. A filling head (13) for a storage system (1), comprising a body (15) including a main part (17) closed by a cover part (19) to form a cavity (20) in which a separation device (21) is received, the filling head (13) is configured to receive a fluid distribution nozzle (10) provided with an automatic stop sensor for preventing overfilling of the filling head (13) within a cylindrical wall (21C) of the separation device (21) extending around a filling direction (F), the filling head (13) is configured to be connected to a filling line (9) and a ventilation line (11) of a fluid tank (3), and the separation device (21) is configured to improve the division of a flow (V) coming from the ventilation line (11) and a flow (F) towards the filling line (9), an upper end (21A) of the body (15) of the separation device (21) facing the cover part (19) includes at least one notch (22) for improving the pressure balance within the filling head (13), and it is guaranteed that the possibility of the fluid flowing out from the nozzle (10) flowing back from the filling head (13) is limited while the automatic stop nozzle (10) is blocked. The filling head (13).

2. The upper end (21A) of the separation device (21) is an annular wall (28), and the at least one notch (22) forms a through passage in a thickness (T) of the annular wall (28). The filling head (13) according to Claim 1.

3. Comprising a buffer volume part (12) connected to the ventilation line (11) and configured to reduce the flow rate (V) from the ventilation line (11), the buffer volume part (12) is integrally formed with the main part (17) in a lateral direction, and a common wall of the main part (17) and the buffer volume part (12) is provided with an opening (26) allowing the flow (V) flowing from the ventilation line (11) into the cavity (20) of the body (15) to pass through. The filling head (13) according to Claim 1 or 2.

4. The cylindrical wall (21C) is at least one hole (31) provided at the upper end (21A) of the separation device (21), and the flow (V) of the fluid coming from the ventilation line (11) passes through the cylindrical wall (23) and is discharged outside the filling head (13); and at least four flanges (23A, 23B, 23C, 23D) protruding laterally from the outer surface of the cylindrical wall (21C) and attached so as to surround the opening (26) of the buffer volume portion (12). A channel (27) is formed toward the at least one hole (31) to enable improvement in the distribution between the flow (V) coming from the ventilation line (11) and the flow (F) toward the filling line (9). The filling head (13) according to claim 3.

5. The cover portion (19) includes a protruding guide element (18) for guiding the dispensing nozzle to the separation device (21). The filling head (13) according to any one of claims 1 to 4.

6. When the nozzle (10) is not received in the separation device (21), the protruding guide element (18) is closed in a sealed state by a cap. The filling head (13) according to claim 5.

7. The inner surface of the protruding guide element (18) has at least one groove (18A), and when the nozzle (10) is received in the protruding guide element (18), the flow (V) from the ventilation line (11) passes through the at least one groove (18A) and is discharged outside the filling head (13). The filling head (13) according to claim 5 or 6.

8. The lower end (21B) of the separation device (21) facing the main part (17) of the main body (15) includes a fixing element (21E) attached to the outer surface of the cylindrical wall (21C), and cooperates with the inner wall (17A) of the main part (17) protruding into the cavity (20) to fix the separation device (21) in the cavity (20) as an extension of the inner wall (17A). The filling head (13) according to any one of claims 1 to 7.

9. The fixing element (21E) and the inner wall (17A) have complementary shapes that limit the possibility of fluid flowing between the lower end (21B) of the separation device (21) and the inner wall (17A) of the main part (17). The filling head (13) according to any one of claims 1 to 8.

10. The filling head (13) according to claim 8 or 9, wherein the inner wall (17A) is at least partially annular, and the fixing element (21E) has a hook shape for gripping the free end of the inner wall (17A).

11. A storage system (1) including a fluid tank (3) connected to a filling line (9) configured to direct a gravity flow of fluid from a filling head (13) to the fluid tank (3), and a ventilation line (11) configured to compensate for pressure fluctuations in the fluid tank (3), wherein the filling head (13) is the filling head (13) according to any one of claims 1 to 10.

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