eVTOL aircraft anti-icing fluid refilling system

Abstract

The utility model relates to the field of liquid delivery device, concretely relates to an eVTOL aircraft anti -icing fluid filling system, including liquid level detection device and the filling device, filling pipe and connecting device that connect gradually, liquid level detection device is used for detecting the liquid level in the anti -icing fluid tank of eVTOL aircraft, the connecting device connects the filling nozzle of anti -icing fluid tank, the filling pipe passes through the connecting device and communicates the filling nozzle, the filling device can introduce the external anti -icing fluid to the filling pipe and flow to the anti -icing fluid tank through the connecting device, and the filling device controls the filling or stop filling of anti -icing fluid according to the liquid level information that liquid level detection device detects, the utility model discloses an eVTOL aircraft anti -icing fluid filling system can realize the automatic filling of anti -icing fluid, greatly reduces the operation load of worker, realizes accurate filling simultaneously, prevents anti -icing fluid and fills too much or fills insufficiently.

Description

Technical Field

[0001] This utility model relates to the field of liquid delivery devices, specifically to an antifreeze filling system for eVTOL aircraft. Background Technology

[0002] eVTOL (Electric Vertical Takeoff and Landing) aircraft use a liquid-cooled thermal management system for their power batteries, requiring antifreeze as the heat transfer medium. An antifreeze tank is needed in the system to handle the liquid filling and degassing of the thermal management loop.

[0003] To maximize the performance of the antifreeze tank, it needs to be positioned at the highest point of the thermal management circuit. Since the thermal management circuit runs through the entire fuselage, its highest point is also the highest point of the eVTOL aircraft's fuselage—the highest and most central location. Therefore, the antifreeze tank's filling port is far from the elevated ladder erected on the eVTOL aircraft's fuselage during filling. This makes it difficult for operators to insert the antifreeze filling hose into the port. Even if they could, they wouldn't be able to see it, forcing them to operate blindly. Furthermore, the inability to see the antifreeze level inside the tank can lead to overfilling or underfilling. Utility Model Content

[0004] In view of this, the present invention provides an antifreeze filling system for eVTOL aircraft, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] To achieve the aforementioned objectives, this utility model provides an antifreeze filling system for an eVTOL aircraft, comprising a liquid level detection device and a filling device, a filling pipe, and a connecting device connected in sequence. The liquid level detection device is used to detect the liquid level in the antifreeze tank of the eVTOL aircraft. The connecting device is connected to the filling nozzle of the antifreeze tank. The filling pipe is connected to the filling nozzle through the connecting device. The filling device can introduce external antifreeze into the filling pipe and flow to the antifreeze tank through the connecting device. Furthermore, the filling device controls the filling or stopping of antifreeze based on the liquid level information detected by the liquid level detection device.

[0006] In the eVTOL aircraft antifreeze filling system described above, optionally, the filling device includes a housing, a hydraulic pump, and a controller. The hydraulic pump and the controller are located inside the housing. The hydraulic pump is connected to the filling pipe. The controller can receive the liquid level information and control the hydraulic pump to turn on or off according to the liquid level information.

[0007] In the eVTOL aircraft antifreeze filling system described above, optionally, the filling device also includes a control panel and / or an emergency stop button, wherein the control panel can display the antifreeze filling status and the emergency stop button can stop the operation of the hydraulic pump.

[0008] In the eVTOL aircraft antifreeze filling system described above, optionally, the connecting device includes a connected cover plate and a connecting part, the cover plate being able to block the filling nozzle, and the connecting part being used to detachably fix the cover plate to the filling nozzle.

[0009] In the eVTOL aircraft antifreeze filling system described above, optionally, the connecting part is annular and arranged around the edge of the cover plate. The connecting part is provided with an internal thread, which matches the external thread at the filling nozzle and can be screwed and fixed to the filling nozzle.

[0010] In the eVTOL aircraft antifreeze filling system described above, optionally, the connecting part is annular and arranged around the edge of the cover plate. The bottom edge of the connecting part has an inwardly extending elastic protrusion, which matches the snap-fit ​​protrusion at the filling nozzle and can snap into the snap-fit ​​protrusion.

[0011] In the eVTOL aircraft antifreeze filling system described above, optionally, the connecting part is annular, with an outer diameter smaller than the diameter of the cover plate, and is located on the bottom surface of the cover plate. The bottom edge of the connecting part has an outwardly extending elastic buckle. The connecting part can extend into the filling nozzle, and the elastic buckle can be engaged at the connection between the filling nozzle and the antifreeze tank.

[0012] In the eVTOL aircraft antifreeze filling system described above, the connecting device may optionally include a handle located on the top surface of the cover plate.

[0013] In the eVTOL aircraft antifreeze filling system described above, optionally, the connecting device further includes a guide, which is a conduit that passes through the cover plate. The portion of the conduit extending beyond the top surface of the cover plate is a connecting section, and the portion of the conduit extending beyond the bottom surface of the cover plate is a guiding section. The connecting section communicates with the filling pipe, and the axial length of the guiding section extends beyond the connecting portion.

[0014] In the eVTOL aircraft antifreeze filling system described above, optionally, the axial length of the guide section is greater than the length of the probe of the liquid level detection device extending into the filling nozzle.

[0015] This utility model's eVTOL aircraft antifreeze filling system includes a liquid level detection device and a filling device, a filling pipe, and a connecting device connected in sequence. Through the cooperation of the filling device and the liquid level detection device, the liquid level detection device detects the liquid level in the antifreeze tank of the eVTOL aircraft and sends the liquid level information to the filling device. The filling device controls the filling or stopping of antifreeze filling according to the liquid level information detected by the liquid level detection device, thereby realizing automatic antifreeze filling, greatly reducing the operator's workload, and achieving precise filling to prevent overfilling or underfilling of antifreeze. Attached Figure Description

[0016] The disclosure of this utility model will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the eVTOL aircraft antifreeze filling system of this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of an embodiment of the eVTOL aircraft antifreeze filling system and the connection of the eVTOL antifreeze tank.

[0019] Figure 3 for Figure 1 A schematic diagram of the internal structure of the antifreeze filling device of the eVTOL aircraft's antifreeze filling system.

[0020] Figure 4 for Figure 1 A schematic diagram of the overall structure from another perspective of an embodiment of the antifreeze filling system for eVTOL aircraft.

[0021] Figure 5 This is a partial cross-sectional view of an embodiment of the eVTOL aircraft antifreeze filling system of this utility model, showing the connection between the antifreeze tank and the tank.

[0022] Figure 6 for Figure 5 A schematic diagram of the connection device in the embodiment.

[0023] Figure 7 for Figure 6 A schematic cross-sectional view of an example of the connecting device in the embodiment.

[0024] Figure 8 for Figure 6 Another example cross-sectional schematic diagram of the connecting device in the embodiment.

[0025] Figure 9 for Figure 6Another example cross-sectional schematic diagram of the connecting device in the embodiment.

[0026] Figure 10 for Figure 6 Another example cross-sectional schematic diagram of the connecting device in the embodiment.

[0027] In the diagram: 1-filling system; 10-filling device; 11-housing; 12-through hole; 13-power interface; 14-switch; 15-control panel; 16-emergency stop button; 17-side wall; 18-top wall; 2-hydraulic pump; 21-inlet pipe; 22-outlet pipe; 3-liquid level detection device; 4-filling pipe; 5-connecting device; 50-guide; 51-cover plate; 52-connecting part; 53-internal thread; 54-elastic protrusion; 55-elastic buckle; 56-handle; 57-connecting section; 58-guide section; 59-slanted opening; 6-antifreeze tank; 60-filling nozzle; 61-sealing ring; 7-controller. Detailed Implementation

[0028] Referring to the accompanying drawings and specific embodiments, the structure, composition, features, and advantages of the eVTOL aircraft antifreeze filling system of this utility model will be described below by way of example. However, all descriptions should not be construed as limiting the present utility model in any way.

[0029] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various drawings, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle. Therefore, these further embodiments according to the present invention should also be considered within the scope of the description herein.

[0030] It should also be noted that the terms “inner,” “outer,” “top,” “bottom,” “upper,” “lower,” “high,” and “lower” indicate the orientation or positional relationship based on the orientation or positional relationship of the antifreeze filling system of the eVTOL aircraft shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0031] from Figure 1 As can be seen, the eVTOL aircraft antifreeze filling system of this utility model includes a liquid level detection device 3 and a filling device 10, a filling pipe 4, and a connecting device 5 connected in sequence. Combined with... Figure 2 As shown, the liquid level detection device 3 extends into the antifreeze tank 6 of the eVTOL aircraft to detect the liquid level of the antifreeze in the antifreeze tank 6. The connecting device 5 is used to fix the filling nozzle 60 (such as...) connected to the antifreeze tank 6. Figure 5As shown, the filling pipe 4 is connected to the filling nozzle 60 via the connecting device 5. The filling device 10 can introduce external antifreeze into the filling pipe 4 and flow into the antifreeze tank 6 through the connecting device 5 to add antifreeze. The filling device 10 can also receive the liquid level information detected by the liquid level detection device 3 and control the addition or stopping of antifreeze, thereby realizing automatic antifreeze addition to avoid overfilling or underfilling.

[0032] During refueling, the refueling device 10 is placed below the antifreeze tank 6 of the eVTOL aircraft, and the refueling pipe 4 extends along the EVTOL fuselage to the top. The length of the refueling pipe 4 can be set according to the distance between the refueling device 10 and the antifreeze tank 6, and is connected to the refueling nozzle 60 of the antifreeze tank 6 located on the top of the eVTOL aircraft through the connecting device 5.

[0033] exist Figure 1 and Figure 2 In the example, the liquid level detection device 3 is connected to the filling device 10, and extends from the filling device 10 along the outer wall of the filling pipe 4, and through the connecting device 5 into the antifreeze tank 6 (e.g. Figure 5 (As shown). In other examples, the liquid level detection device 3 can also be located inside the antifreeze tank 6 and transmit information to the filling device 10 via wireless communication.

[0034] Specifically, in one example, the probe of the level detection device 3 consists of two disconnected wires. The ends of the two wires are located at the target level in the antifreeze tank 6. The two wires are electrically conductive. That is, when the antifreeze level in the antifreeze tank 6 reaches the target level, the two wires are submerged in the antifreeze. Due to the conductivity of the antifreeze, the two wires are connected and send level information to the filling device 10, indicating that the antifreeze has been filled to the target level. When the antifreeze level in the antifreeze tank 6 is lower than the target level, that is, the antifreeze level is far from the two wires, the two wires are disconnected and send level information to the filling device 10, indicating that the antifreeze level has not reached the target level. The level detection device 3 sends different level information to the controller 7 through the two different states of being connected and disconnected. The controller 7 determines whether to continue filling based on the received information and executes the decision to continue filling or stop filling based on the result.

[0035] In other examples, the form of the liquid level detection device 3 is not limited. It can be a light detection device or other detection devices, as long as it can detect the liquid level of antifreeze in the antifreeze tank 6 and send the corresponding liquid level information to the controller 7.

[0036] Furthermore, such as Figure 3As shown, the filling device 10 includes a housing 11, a hydraulic pump 2, and a controller 7. The hydraulic pump 2 and the controller 7 are housed within the housing 11. The housing 11 encapsulates the other components of the filling device 10, providing waterproofing and dustproofing, and making the overall structure of the filling device 10 more compact and easy to move. The hydraulic pump 2 is connected to both the external antifreeze equipment and the filling pipe 4. The controller 7 is connected to the liquid level detection device 3 to receive liquid level information sent by the liquid level detection device 3. Based on the received liquid level information, the controller controls the opening or closing of the hydraulic pump 2, thereby controlling the filling or stopping of the filling process to achieve automatic antifreeze filling.

[0037] Specifically, in combination Figure 3 and Figure 4 The hydraulic pump 2 has an inlet pipe 21 and an outlet pipe 22. The inlet pipe 21 passes through the side wall 17 of the housing 11 and is connected to an external antifreeze device to introduce external antifreeze into the pump body of the hydraulic pump 2. The outlet pipe 22 passes through the top wall 18 of the housing 11 and is connected to a filling pipe 4 to draw antifreeze from the pump body to the filling pipe 4.

[0038] from Figure 4 It can be clearly seen that the outlet pipe 22 is inclined upwards, forming an angle with the top wall 18 of the housing 11 to connect to the filling pipe 4. This allows the filling pipe 4 to be closer to the fuselage of the eVTOL aircraft and extend upwards along the fuselage. Understandably, when the hydraulic pump 2 draws in antifreeze from the outside, air bubbles will be drawn in. These bubbles accumulate within the pump body of the hydraulic pump 2, affecting its pumping and dispensing. Since the bubbles float above the antifreeze, the upward orientation of the outlet pipe 22 allows them to be expelled upwards with the antifreeze. To facilitate the upward extension of the outlet pipe 22 from the top wall 18, the top wall 18 of the housing 11 is provided with a trapezoidal through-hole 12. Figure 3 It can be seen that the through hole 12 is narrower at the edge away from the filling pipe 4 and wider at the edge closer to the filling pipe 4, in order to accommodate the inclined liquid outlet pipe 22.

[0039] Furthermore, such as Figure 1 As shown, for ease of operation, the filling device 10 may also be equipped with a power interface 13, a switch 14, a control panel 15, and / or an emergency stop button 16. Figure 1 In the example, the power interface 13, switch 14, control panel 15 and / or emergency stop button 16 are located on the outer surface of the housing 11 for easy viewing and operation by the operator.

[0040] Specifically, the power interface 13 is used to connect to an external power source to supply power to the hydraulic pump 2 and the controller 7. Optionally, a battery may also be provided inside the housing 11 to supply power to the hydraulic pump 2 and the controller 7. The switch 14 is used to turn on the filling device 10. The control panel 15 is used to display the antifreeze filling status, such as, but not limited to, filling time, antifreeze filling amount, and liquid level in the antifreeze tank 6. The emergency stop button 16 is used to stop the operation of the hydraulic pump 2 in an emergency. When an abnormal situation occurs during filling, the operator can press this emergency stop button 16 to stop the hydraulic pump 2 from running.

[0041] exist Figure 3 In the example, the power interface 13, switch 14, control panel 15, and emergency stop button 16 are all located on one side panel of the housing 11, allowing the operator to operate the filling device 10 from one side, which is convenient for the operator. In an optional example, the power interface 13, switch 14, control panel 15, and emergency stop button 16 can be located on each side panel of the housing 11 as needed.

[0042] Furthermore, such as Figure 5 As shown, the eVTOL aircraft antifreeze filling system of this invention uses a connecting device 5 to fix the filling pipe 4 to the antifreeze tank 6. Specifically, the connecting device 5 is fixed to the filling nozzle 60 of the antifreeze tank 6, thereby preventing antifreeze from spilling onto the outside of the antifreeze tank 6 during the filling process. The filling nozzle 60 protrudes upwards from the upper surface of the antifreeze tank 6. Figure 5 The diagram shows the connection between the filling nozzle 60 and the housing. The connecting device 5 is fixedly connected to the filling nozzle 60, that is, the filling pipe 4 is fixedly connected to the filling nozzle 60, so that the outlet of the filling pipe 4 is aligned with the filling nozzle 60, thereby fixing the position of the filling pipe 4 and preventing the antifreeze from being pressurized by the hydraulic pump 2 and forming an impact force at the outlet of the filling pipe 4, causing the entire filling pipe 4 to shake. In addition, the connecting device 5 can seal the filling nozzle 60 to prevent antifreeze from splashing to the outside at the outlet of the filling pipe 4 during filling.

[0043] Specifically, in combination Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the connecting device 5 includes a cover plate 51 and a connecting part 52. The cover plate 51 can seal the filling nozzle 60 to prevent antifreeze from splashing out of the filling nozzle 60 during filling. The connecting part 52 is used to detachably fix the cover plate 51 to the filling nozzle 60. When filling, the cover plate 51 can be fixed to the filling nozzle 60. After filling, the cover plate 51 can be removed from the filling nozzle 60. The outlet end of the filling pipe 4 passes through the cover plate 51, and the pipe wall of the outlet end is fixedly connected to the cover plate 51.

[0044] exist Figure 6 In the example, the connecting device 5 is a threaded cap; specifically, the connecting part 52 is annular, arranged around the edge of the cap plate 51, and combined with... Figure 7 As shown, the inner wall of the connecting part 52 is provided with an internal thread 53, which matches the external thread (not shown in the figure) on the outer circumference of the filling nozzle 60. The threaded cap can be fixed to the filling nozzle 60 by screwing, so that the cover plate 51 is kept in the position of sealing the filling nozzle 60. After filling, the threaded cap can be removed by screwing.

[0045] exist Figure 8 In the example, the connecting part 52 of the connecting device 5 is annular and arranged around the edge of the cover plate 51. The bottom edge of the connecting part 52 has an inwardly extending elastic protrusion 54, which matches the snap-fit ​​protrusion (not shown in the figure) protruding outward from the outer periphery of the filling nozzle 60 and can snap into the snap-fit ​​protrusion. Specifically, by pressing down, the elastic protrusion 54 is squeezed and deformed by the snap-fit ​​protrusion, the inward protrusion distance of the elastic protrusion 54 decreases, and the elastic protrusion 54 returns to its original shape and is fixedly snapped into the lower part of the snap-fit ​​protrusion by the downward snap-fit ​​protrusion, thereby keeping the cover plate 51 in the position of sealing the filling nozzle 60; during disassembly, by bending the connecting device 5, the elastic protrusion 54 is squeezed and deformed by the snap-fit ​​protrusion, the inward protrusion distance decreases, and the snap-fit ​​protrusion moves upward, thereby completing the disassembly of the connecting device 5.

[0046] exist Figure 9 In the example, the connecting part 52 of the connecting device 5 is annular, and the bottom end of the annulus is provided with an outwardly extending elastic buckle 55. The connecting part 52 is located on the bottom surface of the cover plate 51. The outer diameter of the connecting part 52 is smaller than the diameter of the cover plate 51 and matches the inner diameter of the filling nozzle 60, allowing it to extend into the filling nozzle 60. When fixing the connection, the connecting device 5 is pressed down into the filling nozzle 60. The elastic buckle 55 is deformed by the compression of the inner wall of the filling nozzle 60, passing downward through the filling nozzle 60 with a diameter smaller than the inner diameter of the filling nozzle 60, and then returns to its original state, locking onto the connection between the filling nozzle 60 and the antifreeze tank 6. When disassembling, the connecting device 5 is pulled upward, and the elastic buckle 55 can easily compress and deform the connecting part 52 by the downward compression of the inner wall of the filling nozzle 60, making it smaller than the inner diameter of the filling nozzle 60, so that the connecting part 52 can pass upward through the inner wall of the filling nozzle 60, thereby completing the disassembly of the connecting device 5.

[0047] exist Figure 8 and Figure 9 In the example, due to the structure of the connecting device 5, it can be fixed to the filling nozzle 60 by pressing and can be disassembled by applying an upward force. In other examples, the connecting device 5 can also have other structures, as long as it can be detachably fixed to the filling nozzle 60 and is detachable.

[0048] Furthermore, in Figure 8 and Figure 9In the example, the connecting device 5 may also be provided with a handle 56, which is located on the top surface of the cover plate 51. The operator can hold the handle 56 to fix the connecting device 5 to the filling nozzle 60, and disassemble the connecting device 5 through the handle 56, so that there is a better point of force when disassembling, which is convenient for the operator to operate manually.

[0049] Furthermore, to facilitate the operator in fixing the connecting device 5 to the filling nozzle 60, such as... Figure 6 As shown, the connecting device 5 also includes a guide 50, which can guide the cover plate 51 to the port of the filling nozzle 60 to block the filling nozzle 60. Even if the operator cannot see the filling nozzle 60 because it is located at a high position on the eVTOL aircraft, the operator can still find the filling nozzle 60 through the guide 50.

[0050] exist Figure 5 and Figure 6 In the example, the guide 50 of the connecting device 5 is a conduit that passes through the cover plate 51. A portion of the conduit extends beyond the top surface of the cover plate 51 as a connecting section 57, and another portion extends beyond the bottom surface of the cover plate 51 as a guide section 58. The connecting section 57 connects to the filling pipe 4, allowing antifreeze to be introduced from the filling pipe 4. The guide section 58 is axially longer, extending beyond the connecting portion 52, and its diameter is smaller than that of the filling nozzle 60, allowing it to extend into the antifreeze tank 6. Its axial length allows for quick location of the filling nozzle 60. When the end of the guide section 58 touches the edge of the filling nozzle 60, the guide section 58 moves downwards into the filling nozzle 60. Guided by the guide section 58, the cover plate 51 seals the filling nozzle 60 downwards, and the connecting portion 52 is fixedly connected to the filling nozzle 60. The guide 50 can be integrally formed with the connecting device 5.

[0051] Furthermore, such as Figure 10 As shown, the port of the guide section 58 can be a bevel 59 to avoid the liquid level detection device 3, preventing antifreeze from splashing onto the detection head of the liquid level detection device 3 during filling and affecting the detection structure. Moreover, the tip of the bevel 59 is relatively thin, making it easier to touch the edge of the filling nozzle 60 when searching for it, thus playing a guiding role.

[0052] Furthermore, such as Figure 10 As shown, a sealing ring 61 may also be provided on the outer periphery of the guide section 58 to form a seal with the inner wall of the filling nozzle 60, further sealing the filling nozzle 60 and preventing antifreeze from splashing during filling.

[0053] In other examples, the connecting part 52 can also be a component of other shapes, as long as it is axially long and can extend into the filling nozzle 60.

[0054] Furthermore, the axial length of the guide section 58 is greater than the length of the probe head of the liquid level detection device 3 extending into the probe head. That is, when the connecting device 5 is fixedly connected to the filling nozzle 60, the end of the guide section 58 is lower than the liquid level detection device 3 to prevent antifreeze from splashing at the port of the guide section 58 during filling, which would affect the liquid level detection of the liquid level detection device 3.

[0055] To better monitor the antifreeze filling status of each eVTOL aircraft, the eVTOL aircraft antifreeze filling system may also include a recording device (not shown in the figure). The recording device can record information such as the model of each eVTOL aircraft, the amount of antifreeze added, and the filling time, so as to facilitate subsequent querying of each eVTOL aircraft and the formulation of antifreeze filling strategies.

[0056] In the eVTOL aircraft antifreeze filling system of this utility model, during filling, the operator touches the edge of the filling nozzle 60 of the antifreeze tank 6 through the guide 50, and moves the guide 50 down along the inner wall of the filling nozzle 60 until the connecting part 52 of the connecting device 5 is fixed to the filling nozzle 60, and the cover plate 51 seals the filling nozzle 60. The filling device 10 is started by switch 14. The controller 7 of the filling device 10 controls the hydraulic pump 2 to start running. The liquid level detection device 3 detects the liquid level of the antifreeze in the antifreeze tank 6. When the liquid level reaches the target level, the liquid level detection device 3 sends a message to the controller 7, and the controller 7 shuts down the hydraulic pump 2 to stop filling. As the liquid level in the antifreeze tank 6 decreases, the liquid level detection device 3 sends a message to the controller 7 again, and the controller 7 starts the hydraulic pump 2 to continue filling. This process is repeated, starting and stopping filling, until the filling time reaches the specified filling time or the filling amount reaches the specified filling amount. Then the controller 7 stops the hydraulic pump 2, and the filling is completed.

[0057] During the refueling process, the controller 7 can compare the specified refueling amount with the actual refueling amount. If the difference exceeds a certain error range, an alarm will be triggered to remind the operator. The control panel 15 displays refueling-related parameters, such as refueling time, specified refueling time, refueling amount, specified refueling amount, and reminder information. The operator can monitor the refueling situation through the control panel 15. In case of any abnormality, the operator can stop the operation of the hydraulic pump 2 using the emergency stop button 16 and can set refueling parameters through the control panel 15, including specified refueling time or specified refueling amount.

[0058] This utility model's eVTOL aircraft antifreeze filling system, through the cooperation of controller 7 and liquid level detection device 3, achieves automatic filling of antifreeze, significantly reducing the operator's workload while ensuring precise filling and preventing overfilling or underfilling. Furthermore, the eVTOL aircraft antifreeze filling system also includes a connecting device 5, which detachably fixes the filling pipe 4 to the filling nozzle 60 of the antifreeze tank 6, facilitating the fixed installation of the filling pipe 4 at the highest point of the eVTOL aircraft, achieving convenient, quick, and safe filling.

[0059] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. An antifreeze filling system (1) for an eVTOL aircraft, characterized in that, The device includes a liquid level detection device (3) and a filling device (10), a filling pipe (4), and a connecting device (5) connected in sequence. The liquid level detection device (3) is used to detect the liquid level in the antifreeze tank (6) of the eVTOL aircraft. The connecting device (5) is connected to the filling nozzle (60) of the antifreeze tank (6). The filling pipe (4) is connected to the filling nozzle (60) through the connecting device (5). The filling device (10) can introduce external antifreeze into the filling pipe (4) and flow to the antifreeze tank (6) through the connecting device (5). The filling device (10) controls the filling or stopping of antifreeze according to the liquid level information detected by the liquid level detection device (3).

2. The eVTOL aircraft antifreeze filling system (1) as described in claim 1, characterized in that, The filling device (10) includes a housing (11), a hydraulic pump (2) and a controller (7). The hydraulic pump (2) and the controller (7) are located inside the housing (11). The hydraulic pump (2) is connected to the filling pipe (4). The controller (7) can receive the liquid level information and control the opening or closing of the hydraulic pump (2) according to the liquid level information.

3. The eVTOL aircraft antifreeze filling system (1) as described in claim 2, characterized in that, The filling device (10) also includes a control panel (15) and / or an emergency stop button (16). The control panel (15) can display the antifreeze filling status, and the emergency stop button (16) can stop the operation of the hydraulic pump (2).

4. The eVTOL aircraft antifreeze filling system (1) as described in claim 1, characterized in that, The connecting device (5) includes a connected cover plate (51) and a connecting part (52). The cover plate (51) can block the filling nozzle (60), and the connecting part (52) is used to detachably fix the cover plate (51) to the filling nozzle (60).

5. The eVTOL aircraft antifreeze filling system (1) as described in claim 4, characterized in that, The connecting part (52) is annular and is arranged around the edge of the cover plate (51). The connecting part (52) is provided with an internal thread (53). The internal thread (53) matches the external thread at the filling nozzle (60) and can be screwed and fixed to the filling nozzle (60).

6. The eVTOL aircraft antifreeze filling system (1) as described in claim 4, characterized in that, The connecting part (52) is annular and is arranged around the edge of the cover plate (51). The bottom edge of the connecting part (52) has an inwardly extending elastic protrusion (54). The elastic protrusion (54) matches the snap-fit ​​protrusion at the filling nozzle (60) and can snap into the snap-fit ​​protrusion.

7. The eVTOL aircraft antifreeze filling system (1) as described in claim 4, characterized in that, The connecting part (52) is annular, with an outer diameter smaller than that of the cover plate (51), and is located on the bottom surface of the cover plate (51). The bottom edge of the connecting part (52) has an outwardly extending elastic buckle (55). The connecting part (52) can extend into the filling nozzle (60), and the elastic buckle (55) can be engaged at the connection between the filling nozzle (60) and the body of the antifreeze tank (6).

8. The eVTOL aircraft antifreeze filling system (1) as described in any one of claims 6 or 7, characterized in that, The connecting device (5) further includes a handle (56) which is located on the top surface of the cover plate (51).

9. The eVTOL aircraft antifreeze filling system (1) as described in claim 4, characterized in that, The connecting device (5) further includes a guide (50), which is a conduit that passes through the cover plate (51). The portion of the conduit extending out of the top surface of the cover plate (51) is a connecting section (57), and the portion of the conduit extending out of the bottom surface of the cover plate (51) is a guiding section (58). The connecting section (57) is connected to the filling tube (4), and the axial length of the guiding section (58) extends beyond the connecting portion (52).

10. The eVTOL aircraft antifreeze filling system (1) as described in claim 9, characterized in that, The axial length of the guide section (58) is greater than the length of the probe of the liquid level detection device (3) extending into the filling nozzle (60).

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