Hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control

Abstract

The invention relates to the field of unmanned aerial vehicles, in particular to a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control, which comprises a rack, and a thermal insulation cabin for accommodating a hydrogen fuel cell is arranged on the rack; a first window is arranged on the heat preservation cabin; a temperature control mechanism is arranged on the machine frame and controls the first window to be opened and closed according to the temperature in the heat preservation cabin. The temperature control mechanism comprises an induction cabin and a first push frame; the induction cabin is arranged on the heat preservation cabin, a first piston is arranged in an inner cavity of the induction cabin in a sliding mode, and the induction cabin is filled with gas. The two ends of the first push frame are hinged to the push block and the first connecting rod respectively, the push block is connected with the first piston through a rod piece, and a hinge base hinged to the first connecting rod is arranged on the first window. The function of automatically switching the heat preservation state is achieved, when the temperature of the hydrogen fuel cell is high, the first window is opened through the temperature control mechanism, external air is introduced, and redundant heat is taken away through airflow. The problem that the temperature adjusting capacity of the unmanned aerial vehicle cannot meet the temperature change intensity is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of unmanned aerial vehicles, in particular to a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control. BACKGROUND

[0002] The hydrogen fuel cell unmanned aerial vehicle utilizes the electrochemical reaction of hydrogen and oxygen to generate electric energy for driving flight, and has the advantages of zero carbon emission, long endurance and low temperature resistance. The hydrogen fuel cell is sensitive to temperature change during work. Under low temperature working condition, the electrochemical reaction rate in the battery is significantly reduced, the activation polarization loss is intensified, the output voltage and overall efficiency are greatly reduced, and the risk of electrolyte membrane damage may be caused. At the same time, the excessive temperature difference caused by uneven reaction or heat dissipation in the stack will cause the imbalance of current density distribution, reduce the output stability and accelerate the material aging, and shorten the service life.

[0003] Chinese Patent No. CN108428912B discloses a kind of unmanned aerial vehicle and its working method that can adjust the air temperature in the inner cavity of fuselage, which sets air inlet valve and air outlet valve in the inner cavity of unmanned aerial vehicle fuselage, and carries out temperature control according to the comparison between inner cavity temperature and threshold value: when the temperature of air in the cavity is lower than the lower threshold value, close the air inlet valve and air outlet valve to keep warm;When the temperature is higher than the upper threshold value, open the air inlet valve and air outlet valve at the same time to introduce fresh air for heat dissipation;At the same time, by adjusting the opening of the two valves in real time, the fresh air flow is controlled to maintain the temperature in the cavity near the best working point of the battery. However, the core temperature control means of the existing scheme is limited to the opening / closing state and the opening adjustment of the air inlet valve and the air outlet valve, and in essence, it is to realize temperature adjustment by using passive natural or limited forced convection. Therefore, the regulation mechanism is single, the thermal inertia is large, and when facing the working conditions of rapid temperature rise and fall caused by sudden environmental temperature fluctuation, fuel cell start-up or load mutation, its adjustment capacity is limited, and the response speed is insufficient. This hysteresis may cause the temperature in the cavity to deviate from the best working range of the battery for a long time, and cannot meet the requirements of accurate, timely and dynamic temperature management for maintaining the efficient, stable and reliable work of the hydrogen fuel cell. SUMMARY

[0004] In view of the above problems, a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control is provided, which solves the problem that the temperature adjustment capacity of the existing temperature control scheme cannot meet the temperature change intensity by means of a rack, a heat preservation cabin, a first window and a temperature control mechanism.

[0005] To solve the problems in the prior art, the application provides a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control, which comprises a rack, a heat preservation cabin for accommodating a hydrogen fuel cell is arranged on the rack;A first window is arranged on the heat preservation cabin;A temperature control mechanism is arranged on the rack, and the temperature control mechanism controls the opening and closing of the first window according to the temperature in the heat preservation cabin.

[0006] Preferably, the temperature control mechanism comprises a sensing cabin and a first push frame; the sensing cabin is arranged on the heat preservation cabin, a first piston is slidably arranged in the inner cavity of the sensing cabin, and the sensing cabin is filled with gas; the two ends of the first push frame are respectively hinged to a push block and a first connecting rod, the push block is connected to the first piston through a rod, and a hinge seat hinged to the first connecting rod is arranged on the first window.

[0007] Preferably, a fan is arranged in the heat preservation cabin, the fan is connected to the heat preservation cabin through a frame, and an electric heating pipe is integrated on the electric pile end plate of the hydrogen fuel cell; a second window capable of being opened and closed is arranged on the heat preservation cabin, and a control mechanism for controlling the opening and closing of the second window is arranged on the heat preservation cabin; when the control mechanism controls the second window to be opened, the fan inhales air from the outside through the second window and introduces it into the heat preservation cabin.

[0008] Preferably, a first support is arranged on the first push frame, the first support has a push plate for driving the control mechanism; during the movement of the first push frame away from the sensing cabin, the push plate moves to a specified position to push the control mechanism, and the control mechanism opens the second window.

[0009] Preferably, the control mechanism comprises a limiting component and a control component; the limiting component is used for limiting the opening of the second window; the control component is used for releasing the limitation of the limiting component on the second window; a guide rod slidably matched with the frame of the fan is arranged on the second window, a first elastic member is sleeved on the guide rod, and the two ends of the first elastic member are respectively connected to the second window and the frame of the fan.

[0010] Preferably, a second push frame for pushing the second window to be closed is arranged on the heat preservation cabin, and a linear drive for driving the movement of the second push frame is arranged in the heat preservation cabin.

[0011] Preferably, the limiting component comprises a support, a clamping block and a second elastic member; the support is arranged on the outer wall of the heat preservation cabin; the clamping block is slidably installed on the support, and the two ends of the second elastic member are respectively connected to the support and the clamping block; a clamping groove matched with the clamping block is arranged on the second window, and the clamping block is inserted and matched with the clamping groove to limit the movement of the second window.

[0012] Preferably, the control component comprises a connecting plate, a second connecting rod and a push strip; the connecting plate is connected to the clamping block through the second connecting rod, the second connecting rod is slidably matched with the support; the push strip is slidably matched with the support, a wedge for pushing the connecting plate is arranged on the push strip; a second support is arranged on the outer wall of the heat preservation cabin, and a third elastic member connected to the second support is arranged on the push strip.

[0013] Preferably, a sub-cabin is arranged on the heat preservation cabin, the inner cavity of the sub-cabin is communicated with the inner cavity of the sensing cabin; a second piston is slidably arranged in the inner cavity of the sub-cabin, the two sides of the second piston are respectively communicated with the inner cavity of the sub-cabin and the outer space; a limiting block for limiting the movement range of the second piston is arranged on the inner wall of the sub-cavity; and an elastic protruding strip for hindering the extension of the first piston is arranged on the inner wall of the sensing cabin.

[0014] Preferably, the first window and the second window are both provided with a filter plate.

[0015] The beneficial effects of the present application compared with the prior art are:

[0016] 1. The present application realizes the function of automatic switching of the heat preservation state through the rack, the heat preservation cabin, the first window and the temperature control mechanism. When the temperature of the hydrogen fuel cell is relatively high, the temperature control mechanism opens the first window to introduce external air, and the excess heat is taken away by the airflow. When the temperature of the hydrogen fuel cell is relatively low, the temperature control mechanism controls the first window to be closed to save heat, and the temperature inside the heat preservation cabin is increased by the heat generated by the hydrogen fuel cell. The problem that the temperature adjustment capability of the existing temperature control scheme cannot meet the temperature change intensity is solved.

[0017] 2. The present application realizes the function of actively adjusting the temperature inside the heat preservation cabin through the electric heating pipe, the fan, the second window and the control mechanism. When the ambient temperature is relatively low, the electric heating pipe on the end plate is used for preheating until the core area of the electric pile rises to 40-50℃. When the core of the electric pile reaches the target temperature, the fan intervenes at the lowest speed (about 800rpm) to take the core heat to the low temperature area to prevent local overheating from damaging the membrane electrode.

[0018] 3. The present application realizes the function of sensing the temperature change inside the heat preservation cabin and automatically controlling the opening and closing of the first window according to the temperature through the induction bin and the first push frame. The heat in the heat preservation cabin is transferred to the induction cabin, and then the expansion and contraction of the gas inside the induction cabin automatically control the sliding of the piston. During the working process, the temperature change in the heat preservation cabin causes the gas in the induction cabin to expand or contract, driving the piston to slide; the piston pushes the push block to move, the push block drives the first push frame to move, the first push frame drives the hinge seat through the connecting rod, so that the first window is automatically opened and closed. The above structure completely relies on physical reaction for autonomous operation, without the need for additional control circuit or external energy source, greatly improving the system reliability and response speed, effectively avoiding the risk of electronic component failure, and simplifying the maintenance requirement. At the same time, there is no need to set a temperature sensor, which reduces the total weight of the unmanned aerial vehicle, and further ensures the endurance of the unmanned aerial vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application.

[0020] Figure 2 is a perspective view of a heat preservation cabin of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application, in which the first window and the second window are in a closed state.

[0021] Figure 3 is a perspective view of a heat preservation cabin of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application, in which the first window and the second window are in an open state.

[0022] Figure 4 is a stereoscopic exploded schematic view of a temperature maintaining cabin of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application.

[0023] Figure 5 is a schematic view of a temperature control mechanism and control mechanism of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application. Figure 4 is a partial enlarged view at A in the temperature maintaining cabin.

[0024] Figure 6 is a schematic view of a temperature control mechanism and control mechanism of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application.

[0025] Figure 7 is a schematic view of a temperature control mechanism and control mechanism of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application. Figure 6 is a partial enlarged view at B in the temperature maintaining cabin.

[0026] Figure 8 is a schematic view of a temperature control mechanism and control mechanism of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application.

[0027] Figure 9 is a schematic view of a temperature control mechanism and control mechanism of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application. Figure 8 is a partial enlarged view at C in the temperature maintaining cabin.

[0028] Figure 10 is a schematic view of a temperature control mechanism and control mechanism of a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control according to the present application.

[0029] The reference signs in the drawing are: 1, frame; 11, hydrogen fuel cell; 2, temperature maintaining cabin; 21, first window; 22, fan; 23, second window; 231, guide rod; 232, first elastic member; 233, clamping groove; 24, auxiliary cabin; 241, second piston; 242, limiting block; 25, filter plate; 3, temperature control mechanism; 31, sensing cabin; 311, first piston; 32, first push frame; 321, push block; 322, first connecting rod; 323, first support; 3231, push plate; 4, control mechanism; 41, limiting assembly; 411, support; 412, clamping block; 413, second elastic member; 42, control assembly; 421, connecting plate; 422, second connecting rod; 423, push strip; 4231, wedge block; 4232, third elastic member; 424, second support; 43, second push frame. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application is described in further detail below with reference to the drawings and specific embodiments.

[0031] Reference is made to Figures 1-3The application discloses a hydrogen fuel cell unmanned aerial vehicle based on airflow temperature control, which comprises a rack 1, wherein a heat preservation cabin 2 for accommodating a hydrogen fuel cell is arranged on the rack 1; a first window 21 is arranged on the heat preservation cabin 2; and a temperature control mechanism 3 is arranged on the rack 1, and the temperature control mechanism 3 controls opening and closing of the first window 21 according to the temperature in the heat preservation cabin 2.

[0032] The application realizes the function of automatically switching the heat preservation state through the rack 1, the heat preservation cabin 2, the first window 21 and the temperature control mechanism 3; when the temperature of the hydrogen fuel cell is relatively high, the temperature control mechanism 3 opens the first window 21 to introduce external air, and the airflow carries away the excessive heat; when the temperature of the hydrogen fuel cell is relatively low, the temperature control mechanism 3 controls the first window 21 to be closed to save the heat, and the heat generated by the hydrogen fuel cell increases the temperature in the heat preservation cabin 2. The application solves the problem that the temperature adjustment capacity of the existing temperature control scheme cannot meet the temperature change intensity. During the working process, the temperature control mechanism 3 continuously monitors the temperature in the heat preservation cabin 2; when the temperature is too high, the temperature control mechanism 3 promotes the first window 21 to be opened to dissipate the excessive heat; and when the temperature is too low, the temperature control mechanism 3 controls the first window 21 to be closed to retain the internal heat, so that the hydrogen fuel cell always works in a stable temperature environment. The application achieves the effect of automatically adjusting the temperature of the heat preservation cabin 2, maintains the ideal working condition of the hydrogen fuel cell through timely opening and closing of the first window 21, avoids the influence of temperature fluctuation on the performance, efficiently manages the temperature without manual intervention, prolongs the service life of the hydrogen fuel cell and improves the overall reliability of the hydrogen fuel cell, and reduces the operation complexity.

[0033] Referring to Figure 4 , Figure 6 and Figure 7 The temperature control mechanism 3 comprises a sensing cabin 31 and a first push frame 32; the sensing cabin 31 is arranged on the heat preservation cabin 2, a first piston 311 is slidably arranged in an inner cavity of the sensing cabin 31, and the sensing cabin 31 is filled with gas; two ends of the first push frame 32 are respectively hinged to a push block 321 and a first connecting rod 322, the push block 321 is connected with the first piston 311 through a rod, and the first window 21 is provided with a hinged seat hinged to the first connecting rod 322.

[0034] The application realizes the function of automatically controlling the opening and closing of the first window 21 according to the temperature change in the induction cabin 31 and the first push frame 32, the heat in the heat preservation cabin 2 is transferred to the induction cabin 31, and then the first piston 311 is automatically controlled to slide through the expansion and contraction of the gas in the induction cabin 31. And the optimal working temperature range of the hydrogen fuel cell is usually between 70-80℃, at the initial stage of work, the gas in the induction cabin 31 is in a state of contraction, at this time the first push frame 32 pulls the first connecting rod 322, the first window 21 is in a closed state, until the temperature in the heat preservation cabin 2 reaches above 70℃. During the working process, the temperature change in the heat preservation cabin 2 causes the gas in the induction cabin 31 to expand or contract, driving the first piston 311 to slide; the first piston 311 pushes the push block 321 to move, the push block 321 drives the first push frame 32 to move, the first push frame 32 drives the hinged seat through the first connecting rod 322, so that the first window 21 is automatically opened and closed. Realize the direct conversion of temperature and mechanical movement: use the volume change of gas to accurately drive the first connecting rod 322 mechanism, and convert the temperature signal into the opening and closing action of the window. The advantage is that the structure completely relies on physical reaction to operate independently, without additional control circuit or external energy source, greatly improving the system reliability and response speed, effectively avoiding the risk of electronic component failure, and simplifying the maintenance requirement. At the same time, there is no need to set temperature sensor, reducing the total weight of unmanned aerial vehicle, and then ensuring the endurance of unmanned aerial vehicle.

[0035] With reference to Figure 4 The heat preservation cabin 2 is provided with a fan 22, the fan 22 is connected with the heat preservation cabin 2 through a frame body, and an electric heating pipe is integrated on the hydrogen fuel cell stack end plate; The heat preservation cabin 2 is provided with an openable and closable second window 23, and the heat preservation cabin 2 is provided with a control mechanism 4 for controlling the opening and closing of the second window 23; When the control mechanism 4 controls the second window 23 to open, the fan 22 inhales air flow from the outside through the second window 23 and introduces it into the heat preservation cabin 2.

[0036] The application realizes the function of actively adjusting the temperature inside the heat preservation cabin 2 through the electric heating pipe, the fan 22, the second window 23 and the control mechanism 4. When the ambient temperature is low, the electric heating pipe on the end plate is used for preheating first until the core area of the electric pile rises to 40-50 DEG C. When the core of the electric pile reaches the target temperature, the fan 22 intervenes at a low speed, and the core heat is brought to the low temperature area to prevent local overheating damage to the membrane electrode. During the working process, when the temperature in the heat preservation cabin 2 is too high, the temperature control mechanism 3 opens the first window 21 for heat dissipation first. If the temperature cannot be reduced to the target value, the control mechanism 4 releases the restriction to automatically open the second window 23, and starts the fan 22. The fan 22 actively inhales the external airflow through the opened second window 23 into the heat preservation cabin 2, accelerates the heat air in the cabin to be discharged to realize rapid cooling. When the temperature is too low, the first window 21 and the second window 23 are closed, the electric heating pipe is started to heat and raise the temperature of the electric pile, and the closed first window 21 and the second window 23 prevent cold air from invading. The fan 22 cooperates with the second window 23 to realize efficient heat dissipation, and the electric heating pipe provides auxiliary heating, which can maintain the best working temperature of the hydrogen fuel cell. It can significantly improve the regulation efficiency under extreme temperature, prevent high temperature damage and avoid low temperature performance decay, reduce additional energy consumption, and ensure the continuous and stable operation of the hydrogen fuel cell.

[0037] Referring to Figure 8 and Figure 9 : The first pusher 32 is provided with a first support 323, and the first support 323 is provided with a push plate 3231 for driving the control mechanism 4; during the movement of the first pusher 32 away from the induction cabin 31, the push plate 3231 moves to the specified position to push the control mechanism 4, and the control mechanism 4 opens the second window 23.

[0038] The application realizes the function of automatically controlling the opening and closing of the second window 23 through the first support 323 and the push plate 3231, and the movement of the first push frame 32 is used to trigger the control mechanism 4, so that the second window 23 can be automatically opened after the opening degree of the first window 21 reaches a specified range. During the working process, when the temperature of the heat preservation cabin 2 continues to rise, the gas in the sensing cabin 31 expands to push the first piston 311, so that the first push frame 32 moves away from the sensing cabin 31; at this time, the first support 323 moves synchronously with the first push frame 32. With the continuous rise of the temperature in the heat preservation cabin 2 to above the threshold value, the push plate 3231 moves to the specified position, at this time, the opening degree of the first window 21 also reaches the specified range, the push plate 3231 pushes the push bar 423 of the control mechanism 4, and the control mechanism 4 immediately opens the second window 23, and at the same time, the fan 22 is started to perform efficient heat dissipation. The linkage relationship between the movement of the first push frame 32 and the second window 23 is established, the temperature rise triggers the displacement of the first push frame 32, the push plate 3231 accurately activates the control mechanism 4 through the position change, and the automatic opening of the second window 23 is realized. Only through the linkage of the mechanical structure can the staged opening actions of the first window 21 and the second window 23 be coordinated, the complexity of the coordinated control of multiple components is greatly simplified, the synchronous opening and heat dissipation of the double windows at high temperature are ensured, and the accuracy and consistency of the temperature response of the system are improved.

[0039] With reference to Figure 2 , Figures 4-6 : The control mechanism 4 includes a limiting component 41 and a control component 42; the limiting component 41 is used to limit the opening of the second window 23; the control component 42 is used to remove the limitation of the limiting component 41 on the second window 23; the second window 23 is provided with a guide rod 231 in sliding cooperation with the frame body of the fan 22, the guide rod 231 is sleeved with a first elastic element 232, and the two ends of the first elastic element 232 are connected with the second window 23 and the frame body of the fan 22 respectively.

[0040] The application realizes the function of controlling the lifting of the second window 23 through the guide rod 231, the first elastic member 232, the limiting assembly 41 and the control assembly 42. In the initial state, the second window 23 is limited from moving upward by the limiting assembly 41, and at this time, the first elastic member 232 is in the compressed state. In the working process, when the first push frame 32 moves to the push plate 3231 in the direction away from the induction cabin 31 and the push plate 3231 contacts the control assembly 42, the control assembly 42 triggers and releases the constraint of the limiting assembly 41 on the second window 23. At this time, the first elastic member 232 releases the accumulated force and pushes the guide rod 231 to slide along the fan 22 frame body, so that the second window 23 is automatically opened. The function is realized through a pure mechanical structure to achieve two-stage control: after the control assembly 42 accurately releases the limit, the elastic force immediately drives the window to open, and the sliding guide rod 231 ensures the stable opening and closing track. Compared with the prior art, the elastic energy storage is used to realize instantaneous response, which greatly reduces the failure rate; the mechanical limiting and elastic resetting cooperate to ensure the action reliability, ensure that the second window 23 quickly opens to cooperate with heat dissipation at high temperature, and simplify the overall structure complexity.

[0041] Reference Figure 3 The heat preservation cabin 2 is provided with a second push frame 43 for pushing the second window 23 to close, and the heat preservation cabin 2 is built-in with a linear driver for driving the second push frame 43 to move.

[0042] The application realizes the function of controlling the closing of the second window 23 through the second push frame 43 and the linear driver. The first elastic member 232, the limiting assembly 41 and the control assembly 42 can achieve the effect of automatically controlling the opening of the second window 23. The outer wall of the heat preservation cabin 2 is provided with a contact sensor for detecting the position of the first push frame 32, which has the characteristics of light weight and strong anti-interference compared with the thermocouple temperature sensor which needs a metal probe or a protective sleeve. The linear driver is preferably an electric push rod, and the rack 1 is provided with a controller for human-computer interaction. The contact sensor and the linear driver are electrically connected with the controller. In the working process, when the temperature in the heat preservation cabin 2 decreases to the set range, the first window 21 is closed in linkage with the temperature control mechanism 3. When the first push frame 32 is reset, it contacts the contact sensor, and the contact sensor feeds back a signal to the controller. The controller sends a signal to the linear driver, and the linear driver starts and drives the second push frame 43 to move, and the second push frame 43 directly acts on the second window 23 to make it overcome the elastic force of the first elastic member 232 and close. The function is to provide active closing force to realize accurate temperature control: the linear driver cooperates with the second push frame 43 to forcibly close the second window 23, ensuring that the heat preservation cabin 2 is quickly sealed in a low-temperature environment. Compared with the traditional technology, the bidirectional control is realized through the reverse action of the mechanical thrust and the elastic member, so that the second window 23 has reliable and rapid closing ability, which is complementary to the opening function of the first elastic member 232, significantly improves the response efficiency when the temperature decreases, ensures that the hydrogen fuel cell maintains the best working temperature in the low-temperature condition, and at the same time, strengthens the environmental adaptability of the overall system.

[0043] Referring to Figure 6 , Figure 8 and Figure 10 : The limiting assembly 41 comprises a support 411, a clamping block 412 and a second elastic member 413; the support 411 is arranged on the outer wall of the heat preservation cabin 2; the clamping block 412 is slidingly installed on the support 411, and the two ends of the second elastic member 413 are connected with the support 411 and the clamping block 412 respectively; the second window 23 is provided with a clamping groove 233 matched with the clamping block 412, and when the clamping block 412 is inserted and matched with the clamping groove 233, the movement of the second window 23 is limited.

[0044] The present application realizes the function of limiting the movement of the second window 23 through the support 411, the clamping block 412 and the second elastic member 413. The two sides of the second window 23 are provided with clamping grooves 233, the second push frame 43 and the support 411 are respectively located on the two sides close to the clamping grooves 233, and the second push frame 43 is provided with protrusions matched with the clamping grooves 233. During work, when the second window 23 is closed, the clamping block 412 is inserted into the clamping groove 233 under the action of the second elastic member 413 to realize locking and limit the accidental opening of the second window 23; when the control assembly 42 is pushed by the push plate 3231, the control assembly 42 controls the clamping block 412 to make the clamping block 412 exit the clamping groove 233 by overcoming the elastic force of the second elastic member 413, thereby releasing the limitation on the second window 23. The second window 23 moves upward under the elastic force of the first elastic member 232, and the second window 23 is opened. The above functions are realized through mechanical interlocking and elastic reset to ensure the stability of the window state: the insertion and locking of the clamping block 412 and the clamping groove 233 ensure the sealing property of the second window 23, and the sliding cooperation realizes accurate release of the constraint. The advantages are that the self-locking and releasing are realized by a pure mechanical structure, the clamping action is reliable and has no delay, the second elastic member 413 automatically resets the clamping block 412 to improve the safety of the system, and the accidental opening caused by external vibration is avoided, thereby strengthening the overall sealing performance of the heat preservation cabin 2.

[0045] Referring to Figure 6 , Figures 8-10 : The control assembly 42 comprises a connecting plate 421, a second connecting rod 422 and a push strip 423; the connecting plate 421 is connected with the clamping block 412 through the second connecting rod 422, and the second connecting rod 422 is slidingly matched with the support 411; the push strip 423 is slidingly matched with the support 411, and the push strip 423 is provided with a wedge block 4231 for pushing the connecting plate 421; the outer wall of the heat preservation cabin 2 is provided with a second bracket 424, and the push strip 423 is provided with a third elastic member 4232 connected with the second bracket 424.

[0046] The application realizes the function of controlling the movement of the clamping block 412 through the connecting plate 421, the second connecting rod 422 and the push bar 423. In the working state, when the temperature in the heat preservation cabin 2 rises and exceeds the threshold value, the gas in the sensing cabin 31 expands under the heat, and then pushes the first piston 311 to move. The first piston 311 drives the first push frame 32 to move through the push block 321. The first push frame 32 drives the first support 323 to move, and when the push plate 3231 on the first support 323 contacts the push bar 423, the push bar 423 is pushed to move, and the third elastic member 4232 is compressed under pressure. At the same time, the wedge block 4231 on the push bar 423 extrudes the connecting plate 421, the connecting plate 421 pulls the clamping block 412 through the second connecting rod 422, and the clamping block 412 moves away from the clamping groove 233. After the clamping block 412 is separated from the clamping groove 233, the upward movement of the second window 23 is released.

[0047] Referring to Figure 6 and Figure 8 : The heat preservation cabin 2 is provided with a sub-cabin 24, and the inner cavity of the sub-cabin 24 is communicated with the inner cavity of the sensing cabin 31. The second piston 241 is slidably arranged on the inner cavity of the sub-cabin 24, and the two sides of the second piston 241 are respectively communicated with the inner cavity of the sub-cabin 24 and the external space. The inner wall of the sub-cabin 24 is provided with a limiting block 242 for limiting the movement range of the second piston 241. The inner wall of the sensing cabin 31 is provided with an elastic protruding strip for blocking the first piston 311 from extending.

[0048] The application realizes the function of balancing the gas pressure in the sensing cabin 31 through the setting of the sub-cavity and the second piston 241. In the working process, when the external gas pressure changes, the second piston 241 moves under the action of the gas pressure difference: when the gas pressure rises, the second piston 241 moves into the inner cavity of the sub-cabin 24 to compress the air, and when the gas pressure decreases, the second piston 241 moves outward to expand the air, and the pressure in the sensing cabin 31 is balanced through the change of the volume of the gas; the limiting block 242 prevents the second piston 241 from moving out of the stroke range. The function is to dynamically adjust the total amount of gas in the sensing cabin 31 to offset the fluctuation of the external gas pressure: the sub-cabin 24 expands to increase the air reserve, and the displacement of the second piston 241 buffers the pressure difference, avoiding the false triggering of the piston action caused by the gas pressure disturbance to cause the first window 21 to open and close. Further, it can autonomously offset the influence of the environmental gas pressure, completely eliminate the temperature control misoperation caused by the change of the external gas pressure such as high altitude and weather, and ensure that the first window 21 is only opened and closed when the temperature changes, thereby significantly improving the anti-interference and working stability of the system. And through the setting of the elastic protruding strip, when the gas in the sensing cabin 31 expands under the heat, the second piston 241 is first pushed, until the second piston 241 abuts against the limiting block 242, and then the first piston 311 is pushed to extend by overcoming the damping of the elastic protruding strip. Through the damping provided by the elastic protruding strip, the temperature in the heat preservation cabin 2 needs to rise above the threshold value to push the first piston 311 to extend, and then the first window 21 is opened. Avoiding the situation that the first window 21 is frequently opened and closed when the temperature in the heat preservation cabin 2 fluctuates near the threshold value.

[0049] With reference to Figures 3-5 : The first window 21 and the second window 23 are both provided with filter plates 25.

[0050] The filter plates 25 realize the function of filtering external air, avoiding the situation that impurities in the external environment enter the heat preservation cabin 2 through the first window 21 or the second window 23. During the working process, when the temperature control mechanism 3 drives the first window 21 or the second window 23 to open, the external airflow needs to pass through the filter plates 25 before entering the heat preservation cabin 2. The filter plates 25 directly block the impurities such as dust and particles mixed in the airflow, preventing the impurities from causing component wear, corrosion or performance degradation due to accumulation, strengthening the cleanliness inside the heat preservation cabin 2, and significantly improving the stability and service life of the system during long-term operation.

[0051] The above examples only express one or several embodiments of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A hydrogen fuel cell drone based on airflow temperature control, characterized in that: The invention comprises a frame (1), wherein a heat preservation chamber (2) for accommodating a hydrogen fuel cell is provided on the frame (1); The thermal insulation chamber (2) is provided with a first window (21); A temperature control mechanism (3) is provided on the frame (1), and the temperature control mechanism (3) controls the opening and closing of the first window (21) according to the temperature in the heat preservation chamber (2).

2. The hydrogen fuel cell drone based on airflow temperature control according to claim 1, characterized in that: The temperature control mechanism (3) includes a sensing chamber (31) and a first push frame (32); The sensing cabin (31) is arranged on the heat-insulating cabin (2), a first piston (311) is slidably arranged in the inner cavity of the sensing cabin (31), and the sensing cabin (31) is filled with gas; The two ends of the first push frame (32) are respectively hinged to the push block (321) and the first connecting rod (322); the push block (321) is connected to the first piston (311) via a rod; and a hinge seat hinged to the first connecting rod (322) is provided on the first window (21).

3. The hydrogen fuel cell drone based on airflow temperature control according to claim 2, characterized in that: A fan (22) is provided in the heat preservation chamber (2), and the fan (22) is connected to the heat preservation chamber (2) through a frame. An electric heating pipe is integrated on the end plate of the hydrogen fuel cell stack; The heat preservation chamber (2) is provided with a second window (23) that can be opened and closed, and the heat preservation chamber (2) is provided with a control mechanism (4) for controlling the opening and closing of the second window (23); When the control mechanism (4) controls the second window (23) to open, the fan (22) draws air from the outside through the second window (23) and introduces the air into the heat preservation chamber (2).

4. The hydrogen fuel cell drone based on airflow temperature control according to claim 3, characterized in that: A first bracket (323) is provided on the first push frame (32), and a push plate (3231) for driving the control mechanism (4) is provided on the first bracket (323); When the first push frame (32) moves in a direction away from the sensing cabin (31), the push plate (3231) moves to a specified position to push the control mechanism (4), and the control mechanism (4) opens the second window (23).

5. The hydrogen fuel cell drone based on airflow temperature control according to claim 3, characterized in that: The control mechanism (4) includes a limiting component (41) and a control component (42); The restriction component (41) is used to restrict the opening of the second window (23); The control component (42) is used to release the restriction of the second window (23) by the restriction component (41); The second window (23) is provided with a guide rod (231) that is slidably matched with the frame of the fan (22). The guide rod (231) is sleeved with a first elastic member (232). The two ends of the first elastic member (232) are respectively connected to the second window (23) and the frame of the fan (22).

6. The hydrogen fuel cell drone based on airflow temperature control according to claim 5, characterized in that: A second push frame (43) for pushing the second window (23) to close is provided on the heat preservation chamber (2), and a linear drive for driving the second push frame (43) to move is built into the heat preservation chamber (2).

7. The hydrogen fuel cell drone based on airflow temperature control according to claim 5, characterized in that: The limiting assembly (41) includes a support (411), a clamping block (412), and a second elastic member (413); The support (411) is arranged on the outer wall of the thermal insulation cabin (2); The clamping block (412) is slidably mounted on the support (411), and two ends of the second elastic member (413) are respectively connected to the support (411) and the clamping block (412); The second window (23) is provided with a card slot (233) that cooperates with the card block (412). When the card block (412) and the card slot (233) are plugged in and matched, the movement of the second window (23) is restricted.

8. The hydrogen fuel cell drone based on airflow temperature control according to claim 7, characterized in that: The control assembly (42) includes a connecting plate (421), a second connecting rod (422) and a push bar (423); The connecting plate (421) is connected to the clamping block (412) via a second connecting rod (422), and the second connecting rod (422) is slidably engaged with the support (411); The push strip (423) is slidably matched with the support (411), and a wedge block (4231) for pushing the connecting plate (421) is provided on the push strip (423); A second bracket (424) is provided on the outer wall of the heat-insulating chamber (2), and a third elastic member (4232) connected to the second bracket (424) is provided on the push bar (423).

9. The hydrogen fuel cell drone based on airflow temperature control according to claim 1, characterized in that: The insulation cabin (2) is provided with a sub-cabin (24), and the inner cavity of the sub-cabin (24) is communicated with the inner cavity of the sensing cabin (31); A second piston (241) is slidably provided on the inner cavity of the auxiliary compartment (24), and two sides of the second piston (241) are respectively in communication with the inner cavity of the auxiliary compartment (24) and the external space; The inner wall of the auxiliary compartment (24) is provided with a limit block (242) for limiting the movement range of the second piston (241); The inner wall of the sensing chamber (31) is provided with an elastic convex strip for preventing the first piston (311) from extending.

10. The hydrogen fuel cell drone based on airflow temperature control according to claim 3, characterized in that: Filter plates (25) are provided at both the first window (21) and the second window (23).

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