Long-endurance hydrogen fuel cell unmanned aerial vehicle

Abstract

The application relates to the technical field of unmanned aerial vehicle accessories, and discloses a long-haul hydrogen fuel cell unmanned aerial vehicle, which comprises a hydrogen fuel unmanned aerial vehicle body, a connecting plate is fixedly connected to the bottom of the hydrogen fuel unmanned aerial vehicle body, a reaction bin is fixedly connected to the inner wall of the connecting plate, a convection mechanism is arranged on the outer wall of the hydrogen fuel unmanned aerial vehicle body, and the long-haul hydrogen fuel cell unmanned aerial vehicle further comprises a preheating mechanism arranged on the inner wall of the connecting plate, the preheating mechanism comprises an isolation bin, a heat conduction block is fixedly connected to the inner wall of the isolation bin, heat dissipation holes are formed in the outer wall of the heat conduction block, heat conduction holes are formed in the inner wall of the heat conduction block, and a heating block is fixedly connected to the inner wall of the heat conduction block. The isolation bin and the gas storage bin in the preheating mechanism are extracted into a vacuum environment and are isolated from the external environment, so that the hydrogen fuel reaction speed is prevented from being reduced due to temperature influence when the unmanned aerial vehicle flies in a high-altitude environment, and the unmanned aerial vehicle is ensured to stably react and output and to be stable in performance in the high-altitude environment.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) accessories technology, specifically a long-endurance hydrogen fuel cell UAV. Background Technology

[0002] With the growing awareness of environmental protection and the increasing demand for efficient and long-lasting flight, long-endurance hydrogen fuel cell drones have emerged. Traditional fuel-powered drones suffer from problems such as short flight time and high pollution, while lithium battery-powered drones are limited by energy density and cannot meet the requirements for long-term operation. Hydrogen fuel cells, due to their high energy density and clean, pollution-free operation, have become the key to the innovation of drone power. With the continuous exploration of researchers, hydrogen fuel cell technology has gradually matured and been applied to the field of drones.

[0003] Patent application CN202211288275.0 discloses a long-endurance hydrogen fuel cell drone, belonging to the field of drone technology. It includes a frame, a helical assembly, and a control assembly. The frame includes an upper support plate, a lower support plate, and support columns. Both the upper and lower support plates have several mounting holes. The support columns are positioned between the upper and lower support plates to fix them in place. The helical assembly is connected to the frame and positioned between the upper and lower support plates. Several sets of helical assemblies are arranged at equal angles around the frame to drive it upwards. The control assembly is connected to the frame and electrically connected to several helical assemblies. The control assembly includes a hydrogen storage cylinder detachably connected to the upper support plate.

[0004] However, when hydrogen fuel cell drones fly at high altitudes, the lower temperatures reduce the rate of hydrogen fuel reaction, affecting the drone's flight performance, resulting in decreased flight stability, insufficient power output, and shortened flight time. Summary of the Invention

[0005] The purpose of this invention is to provide a long-endurance hydrogen fuel cell unmanned aerial vehicle (UAV) to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a long-endurance hydrogen fuel cell unmanned aerial vehicle (UAV), comprising a hydrogen fuel cell UAV fuselage, a connecting plate fixedly connected to the bottom of the fuselage, a reaction chamber fixedly connected to the inner wall of the connecting plate, and a convection mechanism provided on the outer wall of the fuselage, and further comprising:

[0007] The preheating mechanism is located on the inner wall of the connecting plate. It includes an isolation chamber, with a heat-conducting block fixedly connected to its inner wall. The heat-conducting block has heat dissipation holes on its outer wall and heat-conducting holes on its inner wall. A heating block is fixedly connected to the inner wall of the heat-conducting block. A gas storage chamber is fixedly connected to its outer wall, with connecting holes on its outer wall. A second connecting pipe and a first connecting pipe are fixedly connected to the outer wall of the gas storage chamber. A return flow hole is located on the inner wall of the first connecting pipe, guiding the gas produced by the hydrogen fuel cell reaction. The heating block preheats the hydrogen fuel, and the heat-conducting holes guide the heat generated by the heating block into the gas storage chamber. The isolation chamber and gas storage chamber in the preheating mechanism are evacuated to a vacuum environment, isolating the external environment and preventing... To prevent the hydrogen fuel reaction rate from slowing down due to temperature fluctuations during high-altitude flight, this system ensures stable reaction output and flight performance for the drone. Simultaneously, a preheating mechanism preheats the hydrogen fuel stored in the gas storage chamber, ensuring a stable reaction at a consistent temperature. This guarantees stable drone performance during flight and maintains good heat dissipation to prevent overheating and potential hazards. The preheating mechanism also collects the hot gas from the hydrogen fuel reaction and recovers it via a spiral path. This low-flow-rate recovery process insulates the hydrogen fuel transport environment, preventing rapid heat loss. Furthermore, the recovered hot gas, circulating through the gas storage chamber in a spiral path, provides additional preheating to the hydrogen fuel, reducing energy consumption and increasing the drone's endurance.

[0008] According to the above technical solution, an exhaust pipe is fixedly connected to the outer wall of the gas storage chamber, and a replenishment port is fixedly connected to the inner wall of the gas storage chamber. An output hole is opened on the inner wall of the connecting pipe. The output hole is used to output hydrogen fuel into the reaction chamber, and the replenishment port is used to replenish hydrogen fuel into the gas storage chamber.

[0009] According to the above technical solution, the convection mechanism includes a support plate 1, the outer wall of which is provided with a guide groove, and the inner wall of the support plate 1 is hinged to a guide plate 2 via a rotating shaft. A guide rod is fixedly connected to the inner wall of the support plate 1, and a spring is fixedly connected to the inner wall of the support plate 1. The other end of the spring is fixedly connected to the inner wall of the guide plate 2. The guide groove is used to guide the airflow of the UAV, and the guide plate 2 is used to adjust the direction of the airflow of the UAV. By guiding the airflow of the UAV through the convection mechanism, convection heat dissipation is achieved with the heat exchange pipeline, and the airflow is adjusted according to the output performance of the UAV, increasing the heat dissipation area for heat exchange and switching. At the same time, the mirror layout cancels out the reverse torque, improving the dynamic balance of the UAV during flight.

[0010] According to the above technical solution, the convection mechanism further includes a second support plate, and a first guide plate is fixedly connected to the outer wall of the second support plate. The second support plate is used to guide the gas of the UAV.

[0011] According to the above technical solution, the outer wall of the heat-conducting block penetrates the outer wall of the gas storage chamber and is fixedly connected to the inner wall of the gas storage chamber. The end of the second connecting pipe away from the gas storage chamber penetrates the outer wall of the first connecting pipe and is fixedly connected to the inside of the reflux hole. The outer wall of the isolation chamber is fixedly connected to the inner wall of the connecting plate. The end of the first connecting pipe away from the gas storage chamber is fixedly connected to the inside of the reaction chamber. The outer wall of the first connecting pipe is fixedly connected to the inside of the connecting hole. The reflux hole is spirally formed on the inner wall of the first connecting pipe with the output hole axis as the rotation axis. The connecting hole is spirally formed on the outer wall of the gas storage chamber. The outer wall of the heat-conducting block protrudes from the outer wall of the isolation chamber. The inner wall of the heat-conducting block protrudes from the inner wall of the gas storage chamber. The heat-conducting block is spirally arranged inside the isolation chamber and the gas storage chamber. The heat-conducting block is used to conduct the heat of the gas inside the gas storage chamber to the outside of the isolation chamber. The space between the isolation chamber and the gas storage chamber is a vacuum environment to isolate the ambient temperature. The connection hole is used to guide the recovered gas after the reaction. A spiral-shaped heat-conducting block runs through the isolation chamber and the gas storage chamber, working in conjunction with the convection mechanism to quickly exchange heat between the gas storage chamber and the outside. This rapidly controls the temperature of the hydrogen fuel in the gas storage chamber, ensuring that the hydrogen fuel is stably maintained at the preheated temperature for output. This allows the hydrogen fuel-powered drone to maintain stable flight performance in low-temperature environments. The vacuum environment between the isolation chamber and the gas storage chamber effectively isolates the hydrogen fuel from the external temperature, preventing excessive heat loss after preheating, which could affect the drone's flight performance. This ensures that the hydrogen fuel is output at a stable preheated temperature, guaranteeing the drone's flight performance in low-temperature environments.

[0012] According to the above technical solution, the output hole penetrates the outer wall of the connecting pipe and communicates with the inside of the gas storage chamber. The outer wall of the exhaust pipe is fixedly connected to the inside of the connecting hole. The exhaust pipe is used for the emission of gas after hydrogen fuel reaction.

[0013] According to the above technical solution, the outer wall of the support plate is fixedly connected to the outer wall of the hydrogen fuel cell drone fuselage, the spring is set on the outer wall of the guide rod, the outer wall of the guide rod is slidably connected to the inner wall of the guide plate, the guide plate rotates inside the guide groove, and the guide rod is used to limit the position of the guide plate.

[0014] According to the above technical solution, there are two sets of convection mechanisms. The two sets of convection mechanisms are symmetrically arranged on both sides of the hydrogen fuel cell drone body with the drone body as the axis of symmetry. The second support plate is located at the bottom of the first support plate. The outer wall of the second support plate is fixedly connected to the outer wall of the hydrogen fuel cell drone body. The first guide plate is bent and inclined, and is used to adjust the gas flow direction of the drone.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This long-endurance hydrogen fuel cell drone isolates the external environment by creating a vacuum between the isolation chamber and the gas storage chamber in the preheating mechanism. This prevents the hydrogen fuel reaction rate from decreasing due to temperature fluctuations when the drone is flying at high altitudes, ensuring stable reaction output and flight performance stability.

[0017] 2. This long-endurance hydrogen fuel cell UAV uses a preheating mechanism to preheat the hydrogen fuel stored in the gas storage tank, ensuring that the hydrogen fuel reacts stably at a stable temperature. This guarantees stable performance of the UAV during flight, while maintaining good heat dissipation to prevent the hydrogen fuel from overheating and causing danger, thus improving the stability of the UAV's flight performance.

[0018] 3. This long-endurance hydrogen fuel cell drone collects the heat from the hydrogen fuel reaction through a preheating mechanism and recovers it in a spiral manner. The low recovery flow rate keeps the hydrogen fuel transport environment warm and prevents rapid heat loss. At the same time, the recovered heat passes through the gas storage chamber in a spiral manner to assist in preheating the hydrogen fuel, reducing the drone's energy consumption and increasing its endurance.

[0019] 4. This long-endurance hydrogen fuel cell UAV guides the airflow of the UAV through a convection mechanism, implements convection cooling with the heat exchange pipeline, and adjusts the airflow according to the output performance of the UAV to increase the heat dissipation area of ​​the heat exchange pipeline. At the same time, the mirror layout cancels out the reverse torque, improving the dynamic balance of the UAV during flight.

[0020] 5. This long-endurance hydrogen fuel cell drone uses a spiral-shaped heat-conducting block that runs through the isolation chamber and the gas storage chamber. In conjunction with the convection mechanism, the heat-conducting block quickly exchanges heat between the gas storage chamber and the outside, rapidly controlling the temperature of the hydrogen fuel in the gas storage chamber. This ensures that the hydrogen fuel is stably maintained at the preheated temperature for output, allowing the hydrogen fuel cell drone to maintain stable flight performance in low-temperature environments.

[0021] 6. This long-endurance hydrogen fuel cell drone effectively isolates the hydrogen fuel from the external temperature through the vacuum environment between the isolation chamber and the gas storage chamber. This prevents the hydrogen fuel from losing heat too quickly after preheating, which could affect the drone's flight performance. It also ensures that the hydrogen fuel can maintain a stable preheating temperature for output, guaranteeing the drone's flight performance in low-temperature environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0023] Figure 2This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the preheating mechanism of the present invention;

[0025] Figure 4 A cross-sectional view of the preheating mechanism of the present invention. Figure 1 ;

[0026] Figure 5 A cross-sectional view of the preheating mechanism of the present invention. Figure 2 ;

[0027] Figure 6 A cross-sectional view of the preheating mechanism of the present invention. Figure 3 ;

[0028] Figure 7 This is a schematic diagram of the structure of the heat-conducting block of the present invention;

[0029] Figure 8 This is a cross-sectional view of the heat-conducting block of the present invention;

[0030] Figure 9 This is a cross-sectional view of the connecting pipe of the present invention;

[0031] Figure 10 This is a cross-sectional view of the convection mechanism of the present invention;

[0032] Figure 11 This is a schematic diagram of the convection mechanism of the present invention.

[0033] In the diagram: 1. Fuselage of the hydrogen fuel cell drone; 101. Connecting plate; 102. Reaction chamber; 2. Preheating mechanism; 201. Isolation chamber; 202. Replenishment port; 203. Heat-conducting block; 204. Heat dissipation hole; 205. Connecting pipe one; 206. Output hole; 207. Return hole; 208. Connecting pipe two; 209. Gas storage chamber; 210. Heat-conducting hole; 211. Connecting hole; 212. Exhaust pipe; 213. Heating block; 3. Convection mechanism; 301. Support plate one; 302. Guide channel; 303. Support plate two; 304. Guide plate one; 305. Guide plate two; 306. Guide rod; 307. Spring. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1, please refer to Figures 1-9The present invention provides a technical solution: a long-endurance hydrogen fuel cell unmanned aerial vehicle (UAV), comprising a hydrogen fuel cell UAV fuselage 1, a connecting plate 101 fixedly connected to the bottom of the hydrogen fuel cell UAV fuselage 1, and a reaction chamber 102 fixedly connected to the inner wall of the connecting plate 101, characterized in that a convection mechanism 3 is provided on the outer wall of the hydrogen fuel cell UAV fuselage 1, and further comprising:

[0036] Preheating mechanism 2 is located on the inner wall of connecting plate 101. Preheating mechanism 2 includes an isolation chamber 201. A heat-conducting block 203 is fixedly connected to the inner wall of the isolation chamber 201. Heat dissipation holes 204 are formed on the outer wall of the heat-conducting block 203. Heat-conducting holes 210 are formed on the inner wall of the heat-conducting block 203. A heating block 213 is fixedly connected to the inner wall of the heat-conducting block 203. A gas storage chamber 209 is fixedly connected to the outer wall of the gas storage chamber 209. A connecting hole 211 is formed on the outer wall of the gas storage chamber 209. A second connecting pipe 208 and a first connecting pipe 205 are fixedly connected to the outer wall of the gas storage chamber 209. A return flow hole 207 is formed on the inner wall of the first connecting pipe 205. The return flow hole 207 is used to guide the gas generated by the hydrogen fuel cell reaction. The heating block 213 is used to heat the hydrogen fuel... Preheating is performed by using heat conduction holes 210 to guide the heat generated by heating block 213 to the gas storage chamber 209. When the long-endurance hydrogen fuel cell drone is put into use, hydrogen fuel is added to the gas storage chamber 209 through the replenishment port 202. The hydrogen fuel is then introduced into the reaction chamber 102 through the output pipe opened by the connecting pipe 205 for reaction. When the hydrogen fuel cell drone body 1 detects that the internal temperature of the gas storage chamber 209 is low, the heating block 213 is activated to preheat the hydrogen fuel inside the gas storage chamber 209. The heat is conducted to the inside of the gas storage chamber 209 through the heat conduction holes 210 to ensure the output temperature of the hydrogen fuel. At the same time, the gap between the gas storage chamber 209 and the isolation chamber 201 is a vacuum environment to reduce the impact of ambient temperature on the preheating temperature. The gas after the hydrogen fuel reaction is released. The gas is recovered through the return port 207 into the connection port 211. During the recovery process, the residual heat carried by the gas is recovered through the return port 207 in a spiral manner through the connecting pipe 205, increasing the residence time inside the connecting pipe 205 and insulating it to prevent the loss of heat from the hydrogen fuel inside the output port 206. The recovered gas enters the connection port 211 through the connecting pipe 208 and is guided through the spirally opened connection port 211 on the outer wall of the gas storage chamber 209, increasing the residence time of the recovered gas inside the connection port 211. The hydrogen fuel inside the recovered gas storage chamber 209 provides auxiliary preheating, reducing the energy consumption of the UAV. After passing through the connection port 211, the recovered gas is discharged into the air through the exhaust pipe 212. During flight, the airflow generated by the hydrogen fuel cell drone fuselage 1 is guided by the convection mechanism 3 to the outer wall of the isolation chamber 201. The heat is then dissipated through the heat-conducting block 203, which runs through the gas storage chamber 209 and the isolation chamber 201, controlling the temperature of the hydrogen fuel inside. This ensures the hydrogen fuel is maintained at a stable preheated temperature for output, maintaining stable flight performance of the drone in high-altitude, low-temperature environments. When the hydrogen fuel cell drone fuselage 1 detects a high temperature in the gas storage chamber 209, the heating block 213 is shut off to stop heating. The airflow generated by the flight of the hydrogen fuel cell drone fuselage 1, guided by the convection mechanism 3, enters the heat-conducting block 203 through the heat dissipation holes 204, rapidly cooling the heat-conducting block 203.And the heat is quickly transferred to the interior of the gas storage chamber 209;

[0037] An exhaust pipe 212 is fixedly connected to the outer wall of the gas storage chamber 209, and a replenishment port 202 is fixedly connected to the inner wall of the gas storage chamber 209. An output hole 206 is opened on the inner wall of the connecting pipe 205. The output hole 206 is used to output hydrogen fuel into the reaction chamber 102, and the replenishment port 202 is used to replenish hydrogen fuel into the gas storage chamber 209. The gas after the hydrogen fuel reaction is recovered into the connecting hole 211 through the return hole 207. During the recovery process, the residual heat carried by the gas is recovered through the return hole 207 in a spiral manner through the connecting pipe 205, increasing... During the residence time inside the first connecting pipe 205, the first connecting pipe 205 is insulated to prevent the heat of hydrogen fuel inside the output hole 206 from being lost. The recovered gas enters the connecting hole 211 through the second connecting pipe 208 and is guided by the connecting hole 211 spirally opened on the outer wall of the gas storage chamber 209, which increases the residence time of the recovered gas inside the connecting hole 211. The recovered gas is also preheated by the hydrogen fuel inside the gas storage chamber 209 to reduce the energy consumption of the UAV. After passing through the connecting hole 211, the recovered gas is discharged into the air through the exhaust pipe 212.

[0038] The outer wall of the heat-conducting block 203 penetrates the outer wall of the gas storage chamber 209 and is fixedly connected to the inner wall of the gas storage chamber 209. The end of the connecting pipe 208 away from the gas storage chamber 209 penetrates the outer wall of the connecting pipe 205 and is fixedly connected to the inside of the return hole 207. The outer wall of the isolation chamber 201 is fixedly connected to the inner wall of the connecting plate 101. The end of the connecting pipe 205 away from the gas storage chamber 209 is fixedly connected to the inside of the reaction chamber 102. The outer wall of the connecting pipe 205 is fixedly connected to the inside of the connecting hole 211. The return hole 207 is spirally opened on the inner wall of the connecting pipe 205 with the axis of the output hole 206 as the axis of rotation. The connecting hole 211 is spirally opened on the outer wall of the gas storage chamber 209. The outer wall of the heat-conducting block 203 protrudes from the isolation chamber 201. 1. The outer wall of the heat-conducting block 203 protrudes from the inner wall of the gas storage chamber 209. The heat-conducting block 203 is spirally arranged inside the isolation chamber 201 and the gas storage chamber 209. The heat-conducting block 203 is used to conduct the heat of the gas inside the gas storage chamber 209 to the outside of the isolation chamber 201. The gap between the isolation chamber 201 and the gas storage chamber 209 is a vacuum environment to isolate the ambient temperature. The connecting hole 211 is used to guide the recovered gas after the reaction. The airflow generated by the hydrogen fuel cell drone fuselage 1 during flight is guided by the convection mechanism 3 to the outer wall of the isolation chamber 201. The heat-conducting block 203 penetrates through the gas storage chamber 209 and the isolation chamber 201, conducting the heat inside the gas storage chamber 209 to the outer wall of the isolation chamber 201. The hydrogen fuel inside the gas storage chamber 209 is temperature-controlled to maintain a stable preheated temperature for output, ensuring stable performance of the drone in high-altitude, low-temperature environments. When the drone body 1 detects a low internal temperature in the gas storage chamber 209, the heating block 213 is activated to preheat the hydrogen fuel inside. Heat is conducted to the inside of the gas storage chamber 209 through the heat conduction hole 210, ensuring the output temperature of the hydrogen fuel. Simultaneously, a vacuum environment is maintained between the gas storage chamber 209 and the isolation chamber 201 to reduce the impact of ambient temperature on the preheating temperature. The gas produced after the hydrogen fuel reaction is recovered to the connection hole 211 through the return hole 207. The residual heat carried in the gas is recovered through the return hole 207 in a spiral manner through the connecting pipe 205, which increases the residence time inside the connecting pipe 205 and insulates the connecting pipe 205 to prevent the loss of heat from the hydrogen fuel inside the output hole 206. The recovered gas enters the connecting hole 211 through the connecting pipe 208 and is guided through the spirally opened connecting hole 211 on the outer wall of the gas storage chamber 209, which increases the residence time of the recovered gas inside the connecting hole 211. The recovered gas is also preheated by the hydrogen fuel inside the gas storage chamber 209 to reduce the energy consumption of the UAV. After passing through the connecting hole 211, the recovered gas is discharged into the air through the exhaust pipe 212.

[0039] The output port 206 penetrates the outer wall of the connecting pipe 205 and communicates with the interior of the gas storage chamber 209. The outer wall of the exhaust pipe 212 is fixedly connected to the interior of the connecting port 211. The exhaust pipe 212 is used for the emission of gas after the hydrogen fuel reaction. Hydrogen fuel is supplied to the gas storage chamber 209 from the replenishment port 202. The hydrogen fuel is introduced into the reaction chamber 102 through the output pipe of the connecting pipe 205 for reaction. The gas after the hydrogen fuel reaction is recovered into the connecting port 211 through the return port 207. The residual heat carried by the gas during the recovery process is discharged through the return port 207. The flow rate is reduced by the spiral of the hole 207, which insulates the first connecting pipe 205 and prevents the heat of the hydrogen fuel inside the output hole 206 from being lost. The recovered gas enters the connecting hole 211 through the second connecting pipe 208 and is guided by the spirally opened connecting hole 211 on the outer wall of the gas storage chamber 209, which increases the residence time of the recovered gas inside the connecting hole 211. The recovered gas is also preheated by the hydrogen fuel inside the gas storage chamber 209 to reduce the energy consumption of the UAV. After passing through the connecting hole 211, the recovered gas is discharged into the air through the exhaust pipe 212.

[0040] Example 2, based on Example 1, please refer to... Figures 10-11The present invention provides a technical solution: the convection mechanism 3 includes a support plate 301, a guide groove 302 is formed on the outer wall of the support plate 301, a guide plate 305 is hinged to the inner wall of the support plate 301 via a rotating shaft, a guide rod 306 is fixedly connected to the inner wall of the support plate 301, and a spring 307 is fixedly connected to the inner wall of the support plate 301. The other end of the spring 307 is fixedly connected to the inner wall of the guide plate 305. The guide groove 302 is used to guide the airflow of the UAV, and the guide plate 305 is used to adjust the direction of the airflow of the UAV. When hydrogen... When the fuel-powered drone fuselage 1 flies at a high speed, the hydrogen fuel is consumed rapidly. The temperature of the recovered gas from the hydrogen fuel cell reaction, which assists in preheating the gas storage chamber through connection hole 211, also rises, causing the gas storage chamber 209 to heat up. When the temperature of the gas storage chamber 209 is detected to be high, the heating block 213 is shut off to heat the hydrogen fuel gas inside the gas storage chamber 209. Simultaneously, the airflow generated during the flight of the fuel-powered drone fuselage 1 presses down on the guide plate 305, causing the guide plate 305 to compress the spring 307 and slide against the outer wall of the guide rod 306. The airflow is guided through the guide channel 302 and then guided by the second guide plate 305 to the outer wall of the second support plate 303. The airflow is further guided by the first guide plate 304, dispersing it towards the isolation chamber 201. The heat exchange block 203 heats the hydrogen fuel inside the gas storage chamber 209, rapidly controlling its temperature. Simultaneously, the airflow guided by the second support plate 303 to the outside of the isolation chamber 201 converges with the airflow isolated outside the first support plate 301 at the outside of the isolation chamber 201, generating… Convection is used to dissipate heat through the heat-conducting block 203. The airflow enters the interior of the heat-conducting block 203 through the heat dissipation holes 204 on the outer wall of the heat-conducting block 203 and flows inside the heat dissipation holes 204, which quickly cools down the heat-conducting block 203. At the same time, the spiral heat-conducting block 203 can increase the heat exchange area and heat exchange efficiency, so that the heat-conducting block 203 can quickly conduct heat to the interior of the gas storage chamber 209 to exchange heat with hydrogen fuel, so that the hydrogen fuel can maintain a stable preheating temperature for output, and the UAV can maintain stable performance to fly in high-altitude and low-temperature environments.

[0041] The convection mechanism 3 also includes a second support plate 303, on the outer wall of which a first guide plate 304 is fixedly connected. The second support plate 303 is used to guide the airflow from the UAV. The airflow generated by the UAV during flight blows onto the second guide plate 305, causing the second guide plate to compress the spring 307, which slides on the outer wall of the guide rod 306. At the same time, the force of the second guide plate compressing the spring 307 is controlled by the flight speed of the UAV, thereby controlling the opening area between the second guide plate 305 and the guide groove 302, and ensuring airflow. When passing through the guide channel 302, the airflow is guided by the second guide plate 305 to the outer wall of the second support plate 303, and then guided by the first guide plate 304 to disperse the airflow towards the isolation chamber 201. The heat exchange block 203 heats the hydrogen fuel inside the gas storage chamber 209, quickly controlling the temperature of the hydrogen fuel. At the same time, the airflow guided by the second support plate 303 to the outside of the isolation chamber 201 converges with the airflow isolated outside the first support plate 301 outside the isolation chamber 201 to generate convection.

[0042] The outer wall of support plate 301 is fixedly connected to the outer wall of the hydrogen fuel cell drone fuselage 1. Spring 307 is installed on the outer wall of guide rod 306. The outer wall of guide rod 306 is slidably connected to the inner wall of guide plate 305. Guide plate 305 rotates inside guide channel 302. Guide rod 306 is used to limit the movement of guide plate 305. The airflow generated by the drone during flight blows onto guide plate 305, causing guide plate 305 to compress spring 307 and slide on the outer wall of guide rod 306. At the same time, the force of guide plate 305 compressing spring 307 is controlled by the flight speed of the drone, thus controlling the flow of the guide plate. The opening area of ​​the second guide plate 305 and the guide channel 302 is controlled. When the airflow passes through the guide channel 302, the airflow is guided by the second guide plate 305 to the outer wall of the second support plate 303. The airflow is also guided by the first guide plate 304 to disperse the airflow towards the isolation chamber 201. The heat exchange block 203 heats the hydrogen fuel inside the gas storage chamber 209, quickly controlling the temperature of the hydrogen fuel. At the same time, the airflow guided by the second support plate 303 to the outside of the isolation chamber 201 converges with the airflow isolated outside the first support plate 301 outside the isolation chamber 201 to generate convection.

[0043] There are two sets of convection mechanisms 3, symmetrically arranged on both sides of the hydrogen fuel cell drone fuselage 1 with the fuselage 1 as the axis of symmetry. Support plate 2 303 is located at the bottom of support plate 1 301, and its outer wall is fixedly connected to the outer wall of the hydrogen fuel cell drone fuselage 1. Guide plate 1 304 is bent and inclined, used to adjust the direction of gas flow from the drone. The symmetrically arranged convection mechanisms 3 adjust the airflow based on the drone's flight speed. The airflow generated during the flight of the hydrogen fuel cell drone fuselage 1... The second guide plate 305 is pressed, causing the spring 307 to slide against the outer wall of the guide rod 306, thus guiding the airflow. The airflow generated by the drone during flight blows onto the second guide plate 305, causing the spring 307 to slide against the outer wall of the guide rod 306. Simultaneously, the force of the spring 307 being pressed by the second guide plate 305 is controlled by the drone's flight speed, thereby controlling the opening area between the second guide plate 305 and the guide channel 302. When the airflow passes through the guide channel 302, the second guide plate 305 guides the airflow... The airflow is guided to the outer wall of the second support plate 303. The airflow direction is adjusted by the bent and inclined guide plate 304, increasing the airflow area to the heat-conducting block 203. The airflow enters the heat-conducting block 203 through the heat dissipation holes 204 on its outer wall and flows within the holes. Simultaneously, the airflow guided by the second support plate 303 to the outside of the isolation chamber 201 merges with the airflow isolated outside the first support plate 301 at the outside of the isolation chamber 201. The convection generates heat transfer to quickly cool the heat transfer block 203. At the same time, the spiral heat transfer block 203 increases the heat exchange area and heat exchange efficiency, enabling the heat transfer block 203 to quickly transfer heat to the interior of the gas storage chamber 209 to exchange heat with the hydrogen fuel. This allows the hydrogen fuel to maintain a stable preheated temperature for output, enabling the UAV to maintain stable performance in high-altitude, low-temperature environments. Meanwhile, the symmetrically arranged convection mechanism 3 guides the airflow and counteracts the reverse torque of the UAV, improving the dynamic balance of the UAV during flight.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long-endurance hydrogen fuel cell unmanned aerial vehicle (UAV), comprising a hydrogen fuel cell UAV fuselage (1), wherein a connecting plate (101) is fixedly connected to the bottom of the hydrogen fuel cell UAV fuselage (1), and a reaction chamber (102) is fixedly connected to the inner wall of the connecting plate (101), characterized in that, The outer wall of the fuselage (1) of the hydrogen fuel cell drone is provided with a convection mechanism (3), and also includes: A preheating mechanism (2) is provided on the inner wall of a connecting plate (101). The preheating mechanism (2) includes an isolation chamber (201). A heat-conducting block (203) is fixedly connected to the inner wall of the isolation chamber (201). A heat dissipation hole (204) is provided on the outer wall of the heat-conducting block (203). A heat-conducting hole (210) is provided on the inner wall of the heat-conducting block (203). A heating block (213) is fixedly connected to the inner wall of the heat-conducting block (203). A gas storage chamber (209) is fixedly connected to the outer wall of the heat-conducting block (203). 9) A connecting hole (211) is provided on the outer wall. A connecting pipe two (208) is fixedly connected to the outer wall of the gas storage chamber (209). A connecting pipe one (205) is fixedly connected to the outer wall of the gas storage chamber (209). A return hole (207) is provided on the inner wall of the connecting pipe one (205). The return hole (207) is used to guide the gas generated by the hydrogen fuel cell reaction. The heating block (213) is used to preheat the hydrogen fuel. The heat conduction hole (210) is used to guide the heat generated by the heating block (213) to the inside of the gas storage chamber (209).

2. The long-endurance hydrogen fuel cell drone according to claim 1, characterized in that: An exhaust pipe (212) is fixedly connected to the outer wall of the gas storage chamber (209), and a replenishment port (202) is fixedly connected to the inner wall of the gas storage chamber (209). An output hole (206) is opened on the inner wall of the connecting pipe (205). The output hole (206) is used to output hydrogen fuel into the reaction chamber (102), and the replenishment port (202) is used to replenish hydrogen fuel into the gas storage chamber (209).

3. The long-endurance hydrogen fuel cell drone according to claim 1, characterized in that: The convection mechanism (3) includes a support plate (301), the outer wall of which is provided with a guide groove (302), the inner wall of which is connected to a guide plate (305) via a rotating shaft hinge, the inner wall of which is fixedly connected with a guide rod (306), and the inner wall of which is fixedly connected with a spring (307). The other end of the spring (307) is fixedly connected to the inner wall of the guide plate (305). The guide groove (302) is used to guide the airflow of the UAV, and the guide plate (305) is used to adjust the direction of the airflow of the UAV.

4. A long-endurance hydrogen fuel cell drone according to claim 3, characterized in that: The convection mechanism (3) also includes a second support plate (303), and a first guide plate (304) is fixedly connected to the outer wall of the second support plate (303). The second support plate (303) is used to guide the gas of the UAV.

5. A long-endurance hydrogen fuel cell drone according to claim 1, characterized in that: The outer wall of the heat-conducting block (203) penetrates the outer wall of the gas storage chamber (209) and is fixedly connected to the inner wall of the gas storage chamber (209). The end of the second connecting pipe (208) away from the gas storage chamber (209) penetrates the outer wall of the first connecting pipe (205) and is fixedly connected to the inside of the return hole (207). The outer wall of the isolation chamber (201) is fixedly connected to the inner wall of the connecting plate (101). The end of the first connecting pipe (205) away from the gas storage chamber (209) is fixedly connected to the inside of the reaction chamber (102). The outer wall of the first connecting pipe (205) is fixedly connected to the inside of the connecting hole (211). The return hole (207) is spirally opened on the first connecting pipe (201) with the axis of the output hole (206) as the axis of rotation. 05) Inner wall, the connecting hole (211) is spirally opened on the outer wall of the gas storage chamber (209), the outer wall of the heat-conducting block (203) protrudes from the outer wall of the isolation chamber (201), the inner wall of the heat-conducting block (203) protrudes from the inner wall of the gas storage chamber (209), the heat-conducting block (203) is spirally arranged inside the isolation chamber (201) and the gas storage chamber (209), the heat-conducting block (203) is used to conduct the heat of the gas inside the gas storage chamber (209) to the outside of the isolation chamber (201), the gap between the isolation chamber (201) and the gas storage chamber (209) is a vacuum environment, used to isolate the ambient temperature, the connecting hole (211) is used to guide the recovered gas after the reaction.

6. A long-endurance hydrogen fuel cell drone according to claim 2, characterized in that: The output hole (206) penetrates the outer wall of the connecting pipe (205) and communicates with the inside of the gas storage chamber (209). The outer wall of the exhaust pipe (212) is fixedly connected to the inside of the connecting hole (211). The exhaust pipe (212) is used for the emission of gas after hydrogen fuel reaction.

7. A long-endurance hydrogen fuel cell drone according to claim 3, characterized in that: The outer wall of the support plate (301) is fixedly connected to the outer wall of the hydrogen fuel cell drone body (1). The spring (307) is set on the outer wall of the guide rod (306). The outer wall of the guide rod (306) is slidably connected to the inner wall of the guide plate (305). The guide plate (305) rotates inside the guide groove (302). The guide rod (306) is used to limit the guide plate (305).

8. A long-endurance hydrogen fuel cell drone according to claim 4, characterized in that: The number of convection mechanisms (3) is two sets. The two sets of convection mechanisms (3) are symmetrically arranged on both sides of the hydrogen fuel cell drone body (1) with the hydrogen fuel cell drone body (1) as the axis of symmetry. The second support plate (303) is located at the bottom of the first support plate (301). The outer wall of the second support plate (303) is fixedly connected to the outer wall of the hydrogen fuel cell drone body (1). The first guide plate (304) is bent and inclined, and is used to adjust the gas flow direction of the drone.

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