A filling head that enables reliable filling without splashing.

Abstract

The present invention relates to a filling head (13) comprising a body (15) including a main body portion (17) closed by a cover to form a cavity for receiving a separation device (21), wherein the top end (21A) of the cover portion of the separation device (21) facing the body (15) includes at least one notch (22) which improves the pressure balance in the filling head (13) when a dispensing nozzle is received in the separation device (21) to ensure that the possibility of fluid flowing from the nozzle back from the filling head (13) during automatic stop nozzle closure is limited.

Description

Technical Field

[0001] The present invention relates to a filling head that can reliably refill fluid tanks, such as vehicle tanks, using nozzles (automatically or non-automatically) without splashing, i.e., no fluid is sprayed back from the filling head during the refilling phase. Background Technology

[0002] Legislation concerning emissions from automobiles (passenger cars) and trucks, among other things, stipulates measures to reduce emissions of nitrogen oxides (NOx) into the atmosphere. x One known method to achieve this is the use of "SCR" (an abbreviation for "Selective Catalytic Reduction"), which reduces nitrogen oxides by injecting a reducing agent (e.g., ammonia) into the exhaust gas line. Typically, an SCR system includes a tank for storing an aqueous additive (e.g., urea solution), a pump for delivering the aqueous additive in a supply line, and a device for metering the required amount of the aqueous additive and injecting it into the exhaust gas line. Thus, by accurately metering the aqueous additive and injecting it into the exhaust gas stream (emission gas stream), it reduces nitrogen oxides (NOx) in the exhaust gas stream. x Hydrolysis is performed before the nitrogen (N2) and water (H2O) are converted.

[0003] Urea solution (sometimes also called) The application of fuel dispensers on trucks has been known for many years. Tank volume is very important in truck series, and in addition to fuel delivery, dispenser systems have been developed with a fill rate of 40 l / min. -1 (ISO222-41-4 standard). In addition, the truck urea storage tank has a large inlet diameter, which enables high ventilation capacity.

[0004] For passenger vehicles, the initial market demand was for filling heads compatible with manual filling, featuring screw-on bottles. Filling (filling) is done by gravity and is typically slow, taking about 3 liters per minute. -1 (ISO 222-41-5 standard). However, due to increased urea solution consumption caused by stricter decontamination levels, regular refilling of urea solution tanks has become more common. Furthermore, consumers have noticed the availability of dispensing devices for trucks, enabling the application of unique delivery rates that differ from expectations.

[0005] Therefore, automakers are now demanding SCR systems that are compatible with both automated filling technology originally designed for heavy-duty applications and manual filling. Examples of filling heads are disclosed in documents WO 2019 / 149750 and WO2021152071.

[0006] Furthermore, currently, three main automated filling technologies are employed, depending on the type of sensor contained in the nozzle (ZVA nozzle sensor, horn nozzle sensor, or PIUSI nozzle sensor). Each sensor is not installed at the tip of the nozzle (as in the ZVA nozzle), but can also be installed upstream of the nozzle (as in the horn and PIUSI nozzle sensors), up to 16 mm from the tip.

[0007] Therefore, regardless of the type of sensor used in the nozzle, many conflicting specifications must be met, such as the need for small diameter screw-top bottles but a filling rate of up to 40 liters per minute. Summary of the Invention

[0008] The present invention aims to provide a filling head that avoids splashing (ejection) from the filling head before and during the closing of the automatic stop nozzle, while allowing the automatic stop sensor of the (re)fill nozzle to detect more quickly.

[0009] Therefore, the object of the present invention is a filling head for a storage system, the filling head comprising a body including a main body portion closed by a cover to form a cavity for receiving (accommodating) a separation device, the filling head being configured to receive a dispensing nozzle for fluid in a cylindrical wall of the separation device extending about the filling direction, the dispensing nozzle having an automatic stop sensor to prevent overfilling of the filling head, the filling head being configured to connect to a filling line and a ventilation line of a fluid reservoir, and the separation device being arranged to improve the separation of flow from the ventilation line from flow to the filling line, characterized in that the top end of the cover portion of the separation device facing the body includes at least one notch, which improves the pressure balance in the filling head when the nozzle is received in the cylindrical wall of the separation device to ensure that the possibility of fluid flowing from the nozzle back from the filling head is limited during automatic stop nozzle closure.

[0010] According to the invention, by means of each notch, better fluid circulation is achieved between the inner and outer volumes of the cylindrical wall, thereby avoiding the application of low pressure in the area between the top and the cap, which could locally cause a suction effect (suction) on the fluid near the nozzle tip, which, if high enough, would cause the fluid to be discharged (ejected) from the filling head.

[0011] The present invention may also include one or more of the following optional features, used alone or in combination.

[0012] The top of the separating device is an annular wall, and the at least one notch forms a through channel in the thickness of the annular wall, thereby achieving better fluid communication between the internal and external volumes of the cylindrical wall by locally increasing the gap between the top and the cover.

[0013] The buffer volume can be configured to connect to the ventilation duct and reduce the velocity of the flow from the ventilation duct. The buffer volume can be integrally formed laterally with the main body. The common wall of the main body and the buffer volume may include a hole that allows the flow from the ventilation duct to pass through and enter the cavity of the body. This configuration allows for further improvements to prevent any splashing from the filling head. Therefore, regardless of the tank volume and / or (re)fill rate, it is possible to better reduce the velocity of the flow from the ventilation duct and to better break up air bubbles along the walls of the buffer volume.

[0014] The cylindrical wall may include at least one orifice located at the top of the separation device, which allows flow of fluid from the vent line to pass through the cylindrical wall and be discharged to the outside of the filling head. At least four flanges, preferably laterally extending (projecting) from the outer surface of the cylindrical wall, may be mounted around the orifice of the buffer volume to form a passage to the at least one orifice, thereby improving the separation of flow from the vent line and flow to the filling line. Thus, when exiting from the orifice, flow from the vent line is essentially only able to communicate with at least one orifice 31 at an upstream level relative to the filling flow direction.

[0015] The cover includes a protruding guide element to direct the dispensing nozzle into the separation device. When the nozzle is not received in the separation device, the protruding guide element can be closed in a sealing manner by the cover.

[0016] The inner surface of the protruding guide element may have at least one groove, such that when the nozzle is received in the protruding guide element, flow from the vent line is allowed to be discharged through at least one groove to the outside of the filling head.

[0017] The bottom end of the main body portion of the separating device facing the body includes a fixing element that is mounted on the outer surface of the cylindrical wall to engage (match) with the inner wall of the main body portion protruding in the cavity to fix the separating device in the cavity and serve as an extension of the inner wall.

[0018] The fixing element and the inner wall can have complementary shapes to limit the possibility of fluid flow between the bottom of the separator and the inner wall of the main body. This configuration forms a labyrinth shape between the bottom of the filling head and the separator.

[0019] The inner wall can be at least partially annular in shape, and the retaining element has a hook shape to grip (hook) the free end of the inner wall. Automatic nozzle closure is significantly improved because the sensor is able to detect fluid in the filling head more quickly.

[0020] Another object of the present invention is a storage system comprising a fluid tank connected to a filling line and a ventilation line, the filling line being configured to guide gravity flow of fluid from a filling head to the tank, and the ventilation line being configured to compensate for pressure changes in the tank, characterized in that the filling head is a filling head according to any of the above embodiments. Attached Figure Description

[0021] Other features and advantages of the invention will become more apparent from the following detailed description of embodiments, which are provided with reference to the accompanying drawings and are not intended to be limiting, wherein:

[0022] - Figure 1 This is a top view schematic diagram of an example vehicle to which the present invention can be applied;

[0023] - Figure 2 This is a perspective view of an example of a filling head according to the present invention;

[0024] - Figure 3 This is a partial perspective view of an example of a filling head according to the present invention;

[0025] - Figure 4 This is a partial top view of an example of a filling head according to the present invention;

[0026] - Figure 5 This is a vertical cross-sectional view of an example filling head according to the invention when receiving a nozzle;

[0027] - Figure 6 It is along Figure 2 A cross-sectional view taken from plane VI-VI;

[0028] - Figure 7 It is along Figure 2 A cross-sectional view taken from plane VII-VII;

[0029] - Figure 8 It is along Figure 2 A cross-sectional view taken from plane VIII-VIII. Detailed Implementation

[0030] In the various figures, the same or similar elements have the same reference numerals, and indexes are optionally added. Therefore, descriptions of their structure and function are not systematically restated.

[0031] Throughout this text, orientation refers to the general orientation of the accompanying drawings. In particular, the terms "upper," "lower," "left," and "right" are placed above, below, left, and right relative to the view in the drawing. Furthermore, the terms "upstream" and "downstream" generally refer to the position of one element relative to another element relative to the direction of the fill flow F.

[0032] It should be understood that the terms used so far may be interchanged where appropriate, and the embodiments of the invention described herein may be operated in directions other than those described or illustrated herein.

[0033] It should be noted that the term "comprising" as used in the claims should not be construed as limited to the devices listed thereafter; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying the presence of the stated feature, integer, step, or component, but not excluding the presence or addition of one or more other features, integers, steps, or components, or groups thereof. Thus, the scope of the expression "device comprising devices A and B" should not be limited to devices consisting solely of components A and B. This means that, with respect to the invention, the only relevant components of the device are A and B.

[0034] The term "tank" should be understood to mean an impermeable tank that can store fluids such as fuel, urea solution, or water under general and various environmental and usage conditions. Examples are fuel tanks used to supply fuel (gasoline, diesel, hydrogen, etc.) to motor vehicles, tanks used to inject urea solution into emission devices, or tanks used to supply water to motor vehicles.

[0035] The term "SCR system" should be understood to refer to a system that uses, for example, a urea solution as a liquid additive to catalytically reduce NOx in exhaust gases from an internal combustion engine (preferably vehicle 41). This invention is advantageously applicable to diesel engines, particularly diesel engines for passenger cars or heavy-duty trucks.

[0036] Furthermore, the urea dispensing nozzle 10 can be introduced into the filling head 13 according to the invention. Therefore, a valve for the dispensing nozzle 10, activated by a magnetic field, has been developed. Thus, when applied to a urea storage tank, the filling head 13 must have a magnetic element for activating the valve and allowing the delivery of the urea solution.

[0037] Numerous specific details are set forth in the specification provided herein. However, it should be understood that embodiments of the invention may be practiced without these specific details. In other instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0038] like Figure 1 As shown, the present invention relates to a vehicle 41 equipped with a power system 43 connected to a purification system 45. More specifically, the purification system 45 includes an emission device 47 and an additive injection device 49 in the emission device 47, the additive being, for example, a urea solution.

[0039] The injection device 49 includes a storage system 1, which includes a tank 3 for storing the aqueous additive. The injection device 49 may also include or exclude multiple sensors immersed in the aqueous additive, such as level sensors, temperature sensors, and / or quality sensors, which may be of capacitive, ultrasonic, or mechanical type.

[0040] The injection device 49 also includes a pump 5 associated with the injection element 7, which is managed by a processing unit of a central computer connected to the vehicle 41. The processing unit includes a memory storing encoded instructions. When the encoded instructions are executed by the processing unit, steps such as those of the SCR method are performed.

[0041] Tank 3 must be periodically (re)filled with aqueous additives, such as urea solution or ammonia solution. Therefore, storage system 1 includes 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 guide the gravity flow of fluid from the filling head 13 to tank 3. The vent line 11 is configured to compensate for pressure changes in tank 3 during refilling by discharging fluid contained in tank 3 from the filling head 13 (fluid that has been compressed due to the fluid arriving in tank 3 from the filling line 9, and which mainly consists of air and gaseous liquid vapor ultimately contained in tank 3).

[0042] Finally, the filling head 13 is configured to receive the nozzle 10 of the fluid distribution system (in Figure 5 (as shown in the diagram), and is connected to the filling line 9 and the ventilation line 11 in a sealed manner for all kinds of fluids (such as air and water-based additives) intended to be stored in the tank 3. Thus, the filling head 13 allows fluid flowing from the nozzle 10 during refilling to flow into the tank 3 via the filling line 9, and at the same time allows fluid present above the liquid in the tank 3 to be discharged from the tank 3 via the ventilation line 11 through the filling head 13 to escape into the ambient air (outside atmosphere) around the vehicle 41.

[0043] The present invention aims to provide a novel filling system for a fluid reservoir 3, which can withstand a wide range of filling rates regardless of the volume of the reservoir 3. More specifically, the present invention relates to the optimization of the filling head 13 to prevent aqueous additives from being ejected from the filling head 13 before and during the closing of the automatic stop nozzle 10, and to allow the automatic stop sensor of the refill nozzle 10 to detect more quickly.

[0044] Therefore, the object of the present invention is a filling head 13 comprising a body 15 which is mounted at an angle relative to the direction of gravity in the vehicle 41. According to the invention, the predetermined angle, when taking the direction of gravity into account, can include a range of 0° to 60°. This angle range allows for good flow of gravity and easy introduction of the dispensing nozzle 10 into the filling head 13.

[0045] The filling head 13 includes a body portion 17 enclosed by a cap 19 to form a cavity 20. According to the first example, the cap 19 can be welded to the body portion 17 in a sealing manner. Therefore, the use of unique welding in the manufacturing process enables shorter cycle times and lower associated costs.

[0046] According to the second example, the cover 19 can be securely attached to the body 17 in a sealing manner by snapping a sealing ring 24 between the cover 19 and the body 17. Therefore, the manufacturing process can avoid welding steps, allowing for a simpler method and enabling the cover 19 to be easily removed for after-sales purposes.

[0047] The cover 19 may include a protruding guide element 18 to guide the dispensing nozzle 10 into the separating device 21 (described below) to allow for better mechanical protection of its cylindrical wall 23. Preferably, when the nozzle 10 is not received in the separating device 21, the protruding guide element 18 is closed in a sealing manner by a screw cap (not shown).

[0048] like Figure 5 and Figure 7 As shown, the cover 19 may include a circumferential magnet 16 in the protruding guide element 18 so as to activate the valve of the nozzle 10 by a magnetic field when the tank 3 is a urea type that allows the delivery of urea solution.

[0049] Furthermore, the inner surface of the protruding guide element 18 has at least one groove 18A so that when the nozzle 10 is received in the protruding guide element 18, the flow V from the vent line 11 is allowed to be discharged to the outside of the filling head 13 via at least one groove 18A.

[0050] The main body 17 may include multiple ribs 17B (four ribs 17B in Figure 6 (As can be seen in the image), so as to receive the separating device 21 abutting against the upper end of each rib 17B (by abutting against the lower surface of the lower flange 29). Therefore, the separating device 21 can be easily removed from the cavity 20 for replacement. Thus, the separating device 21 can be replaced with different geometries to accommodate another type or size of nozzle 10 and / or tank 3.

[0051] The filling head 13 may also include a buffer volume 12 integrated with the body portion 17 to reduce the velocity of the flow V from the ventilation line 11. This configuration allows for further improvements in preventing any splashing from the filling head 13. Depending on the sensor type, the buffer volume 12 includes between 80 ml and 140 ml, preferably between 90 ml and 130 ml, and more preferably between 94 ml and 129 ml. More specifically, the more upstream the sensor of the nozzle is, the larger the buffer volume 12 becomes, taking into account the filling direction F.

[0052] Specifically, the buffer volume 12 is configured to connect to the ventilation duct 11 and reduce the velocity of the flow V from the ventilation duct 11. Therefore, in Figure 2-8 In an exemplary embodiment, the buffer volume 12 is laterally integral with the main body portion 17. The common wall of the main body portion 17 and the buffer volume 12 includes a hole 26, which allows flow V from the ventilation duct 11 to pass through and enter the cavity 20 of the body 15. As particularly in Figure 5 , Figure 7 and Figure 8 As can be seen, the orifice 26 is as high as possible in the buffer volume to facilitate the smooth flow of the flow V to the top of the filling head 13.

[0053] Therefore, the buffer volume 12 can be located as far away from the tank 3 as possible. Advantageously, regardless of the volume and / or filling rate of the tank 3, a better reduction in the velocity of the flow V from the ventilation line 11 and better breakage of bubbles along the wall of the buffer volume 12 are achieved. Furthermore, by means of the separating device 21, the flow F and the flow V are advantageously better separated in the cavity 20 into: the fluid flow F from the nozzle 10 and the fluid flow V from the ventilation line 11 in the body 15, so as to avoid activating the automatic stop function of the dispensing nozzle until the tank 3 is effectively filled.

[0054] According to the invention, the separation device 21, preferably suspended in the cavity 20 of the body 15, is configured to receive the dispensing nozzle 10 in its cylindrical wall 21C extending about the filling direction F, such as Figure 5 As shown in the exemplary embodiment, the separation device 21 is arranged to improve the separation of the flow V from the ventilation duct 11 and the flow F to the filling duct 9. Therefore, as... Figure 5 As shown, when the nozzle 10 abuts against the inner rib 21D of the cylindrical wall 21C, the sensor (ZVA nozzle sensor) mounted at the tip of the nozzle 10 is located in plane I. Even if the sensors (Horn and PIUSI nozzle sensors) are located upstream of the nozzle 10 when considering the filling direction F (possibly as far as 16 mm from the tip of the nozzle 10), all the technical effects and results of the present invention remain advantageously applicable.

[0055] According to a first aspect of the invention, the separating device 21 includes a tip 21A of a cover 19 facing the body 15, the tip 21A including at least one notch 22. When the nozzle 10 is received in the cylindrical wall 21C of the separating device 21, the notch 22 improves the pressure balance in the filling head 13, thereby ensuring that the possibility of fluid flowing from the nozzle 10 back from the filling head 13 is limited during the automatic stop nozzle 10 closure. In fact, at the moment the automatic stop nozzle 10 closes, it has been observed that the internal pressure in the cylindrical wall 21C may suddenly increase. With the help of the notch 22, better fluid circulation between the internal and external volumes of the cylindrical wall 21C is achieved, avoiding the application of lower pressure in the region between the tip 21A and the cover 19, which could locally cause a suction effect on the additive solution near the tip of the nozzle 10, a suction effect high enough to expel it from the filling head 13.

[0056] exist Figure 3-4 In an exemplary embodiment, the top end 21A of the separating device 21 is an annular wall 28, wherein each notch 22 (in Figure 3-4 The three sections form through channels relative to the thickness T of the annular wall, thereby allowing better fluid communication between the internal and external volumes of the cylindrical wall 21C by locally increasing the gap between the top end 21A and the cover 19. Figure 3 In an exemplary embodiment, it can be seen that three notches 22 are provided along the entire height H of the annular wall 28 up to the upper flange 23A. Furthermore, each of the notches 22 is regularly distributed at an angle of approximately 120 degrees around the direction of the filling flow F, and each of the notches 22 empties the annular wall 28 at an angle α of approximately 60 degrees around the direction of the filling flow F, thereby allowing for improved pressure balance between the internal and external volumes of the cylindrical wall 21C.

[0057] According to a second aspect of the invention, the cylindrical wall 21C includes at least one orifice 31 located in the top end 21A of the separating device 21, downstream of the upper flange 23A, thereby allowing fluid flow V from the ventilation line 11 to pass through the cylindrical wall 21C as close as possible to the cover 19. (As in...) Figure 5 and Figure 7 As can be seen in the exemplary embodiment, the fluid flow V from the ventilation duct 11 (via the buffer volume 12) passes through the cylindrical wall 21C as far away from the tip (plane I) of the nozzle 10 as possible so as to be discharged to the outside of the filling head 13.

[0058] Furthermore, at least four flanges 23A, 23B, 23C, and 23D (two horizontal flanges 23A and 23B and two vertical flanges 23C and 23D) project laterally from the outer surface of the cylindrical wall 21C and are mounted around the hole 26 of the buffer volume 12 to form a channel 27 leading to at least one orifice 31, thereby allowing improved separation between the flow V from the ventilation line 11 and the flow F heading to the filling line 9. Therefore, when flowing out from the hole 26, the flow V from the ventilation line 11 via the buffer volume 12 is essentially only able to communicate with at least one orifice 31 that is horizontally upstream relative to the direction of the filling flow F. Figure 8 As better shown, channel 27 leads to orifice 31, its bottom formed by shielding flange 25. It can also be seen that the length L of orifice 26 is substantially equal to the length of buffer volume 12 and channel 27. This configuration ensures that the fluid flowing from nozzle 10 into the body 15 and into filling line 9 forms a laminar flow F, and ensures that the fluid from vent line 11 passing through buffer volume 12 and cylindrical wall 21C forms a direct discharge V. Therefore, this configuration also limits any fluid distribution shutdown / failure during filling.

[0059] According to a third aspect of the invention, when considering the direction of the filling flow F, a shielding flange 25, projecting laterally from the outer surface of the cylindrical wall 21C, is mounted in the cavity 20 upstream of the sensor of the nozzle 10 (when received in the cylindrical wall 21C). This configuration of the shielding flange 25 ensures that the possibility of fluid flowing out of the nozzle 10 present in the filling head 13 flowing back into the filling head 13 is limited without affecting the operation of the sensor.

[0060] Therefore, when considering the direction of the filling flow F, a dead volume is formed downstream of the orifice 31 in the cavity 20 between the shielding flange 25 and the lower flange 29 to receive the fluid that has finally passed through before reaching the top 21A of the separating device 21. In other words, the dead volume forms an additional volume to ultimately store the fluid that has been slowed down due to contact with the lower flange 29, thus preventing splashing from the filling head 13 before and during the automatic stop nozzle 10 is closed.

[0061] The shielding flange 25 of the separating device 21 substantially covers the entire horizontal bottom at the level of the orifice 31, and the lower flange 29 substantially covers the entire horizontal portion of the cavity 20 (downstream of the lower horizontal flange 23B when considering the direction of the filling flow F). This configuration enables the formation of a shield above virtually all the upper surfaces of the fluid present in the filling head 13. In other words, this increases the difficulty for the fluid to reach the dead volume above the lower flange 29 and even more above the shielding flange 25. It can also be seen that the lower portion of the lower flange 29 is substantially located in the plane I of the nozzle tip 10.

[0062] According to a fourth aspect of the invention, the bottom end 21B of the main body portion 17 of the separating device 21 facing the body 15 includes a fixing element 21E mounted to the outer surface of the cylindrical wall 21C. This fixing element is configured to engage (match) with an inner wall 17A protruding into the cavity 20 of the main body portion 17 to secure the separating device 21 as an extension of the inner wall 17A within the cavity 20. This securing function is complementary to the securing function obtained by abutting the lower surface of the lower flange 29 against the upper end of each rib 17B.

[0063] exist Figure 5-7 In an exemplary embodiment, the retaining element 21E and the inner wall 17A have complementary shapes to limit the possibility of fluid flow between the bottom end 21B of the separating device 21 and the inner wall 17A of the body 17. Specifically, the inner wall 17A is at least partially annular, and the retaining element 21E has a hook shape to grip (hook) the free end of the inner wall 17A. Therefore, the automatic stopping of the nozzle 10's closure is significantly improved because the sensor can sense the fluid in the filling head 13 more quickly. This configuration forms a labyrinth shape between the bottom of the filling head 13 and the separating device 21.

[0064] Of course, the present invention is not limited to the embodiments and variations presented, but various other embodiments and / or variations may be adopted, which will be apparent to those skilled in the art. Therefore, while some embodiments described herein include some but not all other features included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and to form different embodiments, as will be understood by those skilled in the art.

[0065] In particular, the shape and / or size can be modified according to a specific application, especially according to the type of storage tank 3.

Claims

1. A filling head (13) for a storage system (1), comprising a body (15) including a main body portion (17) closed by a cover portion (19) to form a cavity (20) in which a separation device (21) is received, the filling head (13) being configured to receive a dispensing nozzle (10) of fluid in a cylindrical wall (21C) of the separation device (21) extending about a filling direction (F), the dispensing nozzle (10) having an automatic stop sensor to prevent overfilling of the filling head (13), the filling head (13) being configured to connect to a filling line (9) and a ventilation line (11) of a fluid reservoir (3), and the separation device (21) being arranged to improve the separation of the flow (V) from the ventilation line (11) and the flow (F) to the filling line (9), characterized in that, The top end (21A) of the cover (19) facing the body (15) of the separation device (21) is an annular wall (28) including at least one notch (22) that forms a through channel relative to the thickness (T) of the annular wall, thereby allowing better fluid communication between the internal and external volumes of the cylindrical wall (21C) by locally increasing the gap between the top end (21A) and the cover (19). When the dispensing nozzle (10) is received in the cylindrical wall (21C) of the separation device (21), the at least one notch (22) improves the pressure balance in the filling head (13) to ensure that the possibility of fluid flowing from the dispensing nozzle (10) flowing back from the filling head (13) is limited during the automatic stop dispensing nozzle (10) closure.

2. The filling head (13) according to claim 1, comprising a buffer volume (12) configured to connect to the ventilation duct (11) and reduce the velocity of the flow (V) from the ventilation duct (11), the buffer volume (12) being laterally integral with the body portion (17), the common wall of the body portion (17) and the buffer volume (12) including a hole (26) allowing the flow (V) from the ventilation duct (11) to pass through and enter the cavity (20) of the body (15).

3. The filling head (13) according to claim 2, wherein, The cylindrical wall (21C) includes at least one orifice (31) and at least four flanges (23A, 23B, 23C, 23D) located at the top end (21A) of the separation device (21). The at least one orifice (31) allows a flow (V) of fluid from the ventilation line (11) to pass through the cylindrical wall (21C) and be discharged to the outside of the filling head (13). The at least four flanges (23A, 23B, 23C, 23D) extend laterally from the outer surface of the cylindrical wall (21C) and are mounted around the hole (26) of the buffer volume (12) to form a channel (27) leading to the at least one orifice (31), thereby improving the separation of the flow (V) from the ventilation line (11) and the flow (F) to the filling line (9).

4. The filling head (13) according to claim 1, wherein, The cover (19) includes a protruding guide element (18) to guide the dispensing nozzle into the separation device (21).

5. The filling head (13) according to claim 4, wherein, When the dispensing nozzle (10) is not received in the separation device (21), the protruding guide element (18) is closed in a sealing manner by the cover.

6. The filling head (13) according to claim 4, wherein, The inner surface of the protruding guide element (18) has at least one groove (18A) such that when the dispensing nozzle (10) is received in the protruding guide element (18), the flow (V) from the ventilation line (11) is allowed to be discharged to the outside of the filling head (13) via the at least one groove (18A).

7. The filling head (13) according to claim 1, wherein, The bottom end (21B) of the main body portion (17) of the separating device (21) facing the body (15) includes a fixing element (21E) which is mounted on the outer surface of the cylindrical wall (21C) to engage with the inner wall (17A) of the main body portion (17) protruding in the cavity (20) to fix the separating device (21) in the cavity (20) and serve as an extension of the inner wall (17A).

8. The filling head (13) according to claim 7, wherein, The fixing element (21E) and the inner wall (17A) have complementary shapes to limit the possibility of fluid flow between the bottom end (21B) of the separation device (21) and the inner wall (17A) of the main body (17).

9. The filling head (13) according to claim 7, wherein, The inner wall (17A) is at least partially annular in shape, and the fixing element (21E) has a hook shape to grip the free end of the inner wall (17A).

10. A storage system (1) comprising a fluid tank (3) and a ventilation line (11), the fluid tank (3) being connected to a filling line (9) configured to guide gravity flow of fluid from a filling head (13) to the tank (3), the ventilation line (11) being configured to compensate for pressure changes in the tank (3), characterized in that, The filling head (13) is the filling head according to any one of claims 1-9.

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