Onboard evaporative air duct and onboard auxiliary cooling system

Abstract

The present application provides an airborne evaporative air duct and an airborne auxiliary cooling system. The airborne evaporative air duct comprises an air duct body (3) and an air guide and drainage structure (19) arranged in the air duct body (3). An air inlet (4) is arranged at the bottom of the air duct body (3), and an annular stop structure (7) is arranged at the air inlet (4). The annular stop structure (7) is used to stop condensed water flowing through the inner wall of the air duct body (3). A drainage port (8) is arranged at the bottom of the air duct body (3) near the annular stop structure (7). The air guide and drainage structure (19) extends along the flow direction of the air flow, and a water retaining structure (20) is arranged on the windward side of the air guide and drainage structure (19) to prevent condensed water from flowing out of the air inlet (4) along the air guide and drainage structure (19). According to the airborne evaporative air duct of the present application, it is possible to prevent condensed water from being directly discharged from the air inlet of the evaporative air duct, thereby improving the drainage effect of condensed water.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft air conditioning, and in particular to an airborne evaporative air duct and an airborne auxiliary cooling system. Background Art

[0002] The onboard auxiliary cooling system is the only cooling system before the aircraft takes off. Different from the aircraft environmental control system, the onboard auxiliary cooling system uses conventional fluorine refrigeration solutions such as compressors and heat exchangers. The evaporator is one of the four essential components of the onboard evaporative cycle refrigeration system. It uses evaporative refrigeration cycle technology to cool the air passing through the evaporator by evaporating the refrigerant in the evaporator core, and uses the evaporative fan to send the low-temperature air into the cabin to achieve the purpose of air conditioning.

[0003] During the operation, the evaporator temperature is low, condensation water is continuously formed, and then frost blocks the evaporator, so that the air cannot pass through the evaporator for cooling. For the refrigeration system, common condensation water discharge methods include: gravity self-flow method, water seal method, and mechanical lifting method. However, due to the change of the flight state of the aircraft, the tilt angle will change when it is in different flight states. When it is in a certain tilt angle range, the condensation water will drip from the middle of the evaporator and fly directly out of the air inlet of the evaporation air duct to other positions of the aircraft, resulting in poor drainage effect of the condensation water. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide an airborne evaporative air duct and an airborne auxiliary cooling system, which can prevent condensed water from being directly discharged from the air inlet of the evaporative air duct and improve the drainage effect of condensed water.

[0005] In order to solve the above-mentioned problems, the present application provides an airborne evaporative duct, including an air duct body and an air guide and drainage structure arranged in the air duct body, an air inlet is arranged at the bottom of the air duct body, an annular stop structure is arranged at the air inlet, the annular stop structure is used to stop condensed water flowing through the inner wall of the air duct body, a drain outlet is arranged at the bottom position of the air duct body near the annular stop structure, the air guide and drainage structure extends along the flow direction of the airflow, and a water retaining structure is arranged on the windward side of the air guide and drainage structure to prevent condensed water from flowing out of the air inlet along the air guide and drainage structure.

[0006] Preferably, there are at least two wind guide and drainage structures, and at least two wind guide and drainage structures are arranged at intervals along the flow direction of the airflow; and / or, the air duct body includes an upper guide wall and a lower guide wall, and there are at least two wind guide and drainage structures, and at least two wind guide and drainage structures are arranged at intervals along the direction from the upper guide wall to the lower guide wall.

[0007] Preferably, a preset angle is formed between the guide surface of the wind guide and drainage structure and the vertical plane, and the preset angle θ is ≥ 30°.

[0008] Preferably, the preset angle θ=90°.

[0009] Preferably, the wind guiding and drainage structure extends horizontally to both side walls of the air duct body.

[0010] Preferably, the water retaining structure and the wind guiding and drainage structure extend in the same direction, and there is a preset distance between the water retaining structure and the side wall of the air duct body; or, the water retaining structure and the wind guiding and drainage structure extend in the same direction, the water retaining structure extends to the side wall of the air duct body, and a drainage channel is formed between the water retaining structure and the side wall of the air duct body.

[0011] Preferably, the air duct body comprises an upper guide wall and a lower guide wall, and in a vertical cross section, the air guiding and drainage structure is an arc-shaped structure recessed toward the lower guide wall.

[0012] Preferably, the air duct body includes an upper guide wall and a lower guide wall, and the water retaining structure is a V-shaped baffle, one side wall of the V-shaped baffle is located on the side of the wind guide structure close to the upper guide wall, and a guide groove is formed between the guide surface of the wind guide structure, and the other side wall of the V-shaped baffle is located on the side of the wind guide structure close to the lower guide wall, and a guide groove is formed between the guide surface of the wind guide structure.

[0013] Preferably, both side walls of the V-shaped baffle are arc-shaped side walls.

[0014] Preferably, the annular stop structure comprises an annular baffle plate arranged at the air inlet, and a backwater bay is formed between the annular baffle plate and the air duct body.

[0015] Preferably, the inner ring of the annular baffle is provided with a guide ring, and the guide ring extends toward the inner side of the air duct body.

[0016] Preferably, the guide ring is an arc-shaped guide ring, and the end of the arc-shaped guide ring is bent toward the backwater bay.

[0017] Preferably, the guide ring and the annular baffle form an arc-shaped guide surface at the connection position, the end of the guide ring extends toward the side where the air outlet is located, and the extension length of the guide ring covers the length of the backwater bay in this direction.

[0018] Preferably, a sunken groove is formed on the air duct body at the position connected to the annular baffle, the guide ring extends toward the air outlet of the air duct body, the guide ring covers the sunken groove, and there is a preset gap between the wall of the guide ring facing the backwater bay and the wall of the air duct body.

[0019] Preferably, the preset interval is greater than or equal to 2 mm and less than or equal to 5 mm.

[0020] Preferably, when the aircraft is in a horizontal flight state, the annular baffle is in a vertical state.

[0021] Preferably, the air duct body comprises an upper guide wall and a lower guide wall, and the height of the annular baffle decreases along the direction from the lower guide wall to the upper guide wall.

[0022] Preferably, the angle between the air inlet surface and the air outlet surface of the air duct body is 10° to 90°.

[0023] Preferably, the angle between the air inlet surface and the air outlet surface of the air duct body is 60°.

[0024] Preferably, a mounting groove for mounting the evaporator is provided at the air outlet of the air duct body.

[0025] Preferably, the depth of the mounting groove is greater than or equal to the thickness of the evaporator.

[0026] Preferably, the groove wall of the installation groove is smoothly transitionally connected to the inner wall surface of the air duct body.

[0027] Preferably, when the aircraft is in a horizontal flight state, a preset angle is formed between the mounting surface of the mounting groove and the horizontal plane.

[0028] Preferably, an air pipe groove and a liquid pipe groove are provided on the top of the installation groove, and the air pipe groove and the liquid pipe groove are U-shaped.

[0029] Preferably, U-shaped convex ribs are provided in the air pipe groove and the liquid pipe groove.

[0030] Preferably, the cross-sectional shape of the air duct body transitions from a circle to a rectangle along the direction from the air inlet to the air outlet.

[0031] Preferably, the wind guiding and drainage structure is integrally formed with the air duct body.

[0032] Preferably, there are at least two drain outlets, and the at least two drain outlets are arranged side by side.

[0033] According to another aspect of the present application, an airborne auxiliary cooling system is provided, comprising an airborne evaporative air duct, wherein the airborne evaporative air duct is the airborne evaporative air duct mentioned above.

[0034] The airborne evaporative duct provided in the present application includes an air duct body and an air guiding and drainage structure arranged in the air duct body. An air inlet is arranged at the bottom of the air duct body, and an annular stop structure is arranged at the air inlet. The annular stop structure is used to stop condensed water flowing through the inner wall of the air duct body. A drain outlet is arranged at the bottom position of the air duct body near the annular stop structure. The air guiding and drainage structure extends along the flow direction of the airflow, and a water retaining structure is arranged on the windward side of the air guiding and drainage structure to prevent condensed water from flowing out of the air inlet along the air guiding and drainage structure. The airborne evaporative duct adds an air guiding and drainage structure inside the duct body and provides a water retaining structure on the windward side of the air guiding and drainage structure. The air guiding and drainage structure can be used to receive condensed water dripping from the evaporator into the duct body, and the water retaining structure can be used to prevent the condensed water from flowing out of the air inlet along the air guiding and drainage structure, thereby effectively guiding the condensed water so that the condensed water can always be located inside the duct body and converge from the inside of the duct body to the drain outlet at the bottom and then flow out from the drain outlet, thereby effectively preventing the condensed water from being directly discharged from the air inlet of the evaporative duct and improving the drainage effect of the condensed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of an airborne evaporation unit according to an embodiment of the present application;

[0036] Figure 2 This is a schematic side view of the structure of an airborne evaporation unit according to one embodiment of the present application;

[0037] Figure 3 This is a schematic cross-sectional structural diagram of an airborne evaporation unit according to one embodiment of the present application;

[0038] Figure 4 This is a schematic diagram of a three-dimensional cross-sectional structure of an airborne evaporation unit according to an embodiment of the present application;

[0039] Figure 5 This is a schematic diagram of the exploded structure of an airborne evaporation unit according to one embodiment of the present application;

[0040] Figure 6 This is a schematic structural diagram of an airborne evaporation duct of an airborne evaporation unit according to an embodiment of the present application when the nose of the aircraft is tilted downward by 30°;

[0041] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at L;

[0042] Figure 8 A schematic diagram of a three-dimensional cross-sectional structure of an airborne evaporation air duct of an airborne evaporation unit according to an embodiment of the present application;

[0043] Fig. 9 A schematic diagram of the structure of an airborne evaporation duct of an airborne evaporation unit according to an embodiment of the present application;

[0044] Fig.10 This is a schematic structural diagram of an airborne evaporation duct of an airborne evaporation unit according to an embodiment of the present application when the aircraft is in a horizontal flight state;

[0045] Fig.11 This is a schematic structural diagram of an airborne evaporation duct of an airborne evaporation unit according to an embodiment of the present application when the nose of the aircraft is tilted upward by 45°;

[0046] Fig.12 It is a schematic diagram of the three-dimensional structure of an airborne evaporation air duct of an airborne evaporation unit according to an embodiment of the present application.

[0047] The reference numerals are:

[0048] 1. Airborne evaporation duct; 2. Evaporator assembly; 3. Duct body; 4. Air inlet; 5. Air outlet; 6. Mounting groove; 7. Annular stop structure; 8. Drainage outlet; 9. Mounting plate; 10. Mounting surface; 11. Upper guide wall; 12. Lower guide wall; 13. Air outlet duct; 14. Evaporation fan; 15. One-way valve; 16. Air pipe groove; 17. Liquid pipe groove; 18. U-shaped convex rib; 19. Air guide and drainage structure; 20. Water retaining structure; 21. Drainage channel; 22. Annular baffle; 23. Guide ring; 24. Air collecting pipe; 25. Liquid inlet pipe; 26. Suspension structure. DETAILED DESCRIPTION

[0049] See also Figures 1 to 12 As shown, according to an embodiment of the present application, the airborne evaporation unit includes an airborne evaporation duct 1 and an evaporator assembly 2, the airborne evaporation duct 1 includes an air duct body 3, a mounting groove 6 is provided at the top air outlet 5 of the air duct body 3, the evaporator assembly 2 is installed in the mounting groove 6, an air inlet 4 is provided at the bottom of the air duct body 3, an annular stop structure 7 is provided at the air inlet 4, the annular stop structure 7 is used to stop condensed water flowing through the inner wall of the air duct body 3, and a drain outlet 8 is provided at the bottom position of the air duct body 3 near the annular stop structure 7.

[0050] The evaporator assembly 2 of the airborne evaporation unit is installed in the installation groove 6 of the duct body 3, so that the part where the evaporator assembly 2 generates condensed water is located inside the duct body 3. Therefore, the condensed water can be controlled in the duct body 3 without dead angles, and the condensed water will not flow out to cause the airborne evaporation unit to leak. The drainage is reliable. Since the airborne evaporation unit uses the annular stop structure 7 located at the bottom of the duct body 3 to block water and uses the drain port 8 at the bottom to drain water, it is equivalent to using the return water bay formed by the annular stop structure 7 and the duct body 3 to replace the water receiving pan in the existing structure. Therefore, the airborne evaporation duct 1 itself has the collection and drainage functions. Therefore, there is no need to design an additional water receiving and drainage structure at the bottom of the evaporator. Therefore, the heat exchange surface of the evaporator assembly 2 will no longer be blocked by the water receiving pan, the heat exchange area is larger, the evaporation efficiency is higher, the system wind resistance loss is smaller, the fan power consumption is reduced, and the overall machine efficiency is greatly improved.

[0051] By arranging a return water bay and a drain port 8 at the bottom of the air duct body 3, the condensed water generated by the evaporator assembly 2 can be conveniently guided along the inner wall of the air duct body 3 to the return water bay, and the condensed water collected in the return water bay can be promptly discharged through the drain port 8. Therefore, the structure of the airborne evaporative air duct 1 itself can be fully utilized to realize the drainage function without the need for additional drainage devices. The structure is simple and the weight is lighter.

[0052] In one embodiment, the groove wall of the mounting groove 6 is smoothly transitioned to the inner wall surface of the air duct body 3, so that the surface of the bottom of the evaporator assembly 2 can be smooth without any protruding structure, thereby not forming any obstruction on the heat exchange surface of the evaporator assembly 2, allowing the evaporator assembly 2 to form full heat exchange surface heat exchange, thereby improving the heat exchange efficiency of the evaporator assembly 2.

[0053] In one embodiment, a mounting surface 10 is provided at the top of the mounting groove 6, the depth of the mounting groove 6 is greater than or equal to the thickness of the evaporator assembly 2, the evaporator assembly 2 includes a mounting plate 9 provided at the top, and the evaporator assembly 2 is hung on the mounting surface 10 through the mounting plate 9 to form a hanging structure. This structure can ensure that the evaporator assembly 2 is located below the lower surface of the mounting plate 9 and is completely located in the mounting groove 6, so that the condensed water generated on the surface of the evaporator assembly 2 can be completely located in the air duct space formed by the mounting groove 6 and the air duct body 3, and no leakage will occur, thereby improving the drainage reliability. The condensed water generated during the operation of the evaporator assembly 2 flows downward under the action of gravity, and will not flow to the surface of the mounting plate 9 of the evaporator assembly 2, and therefore cannot leak to the outside of the evaporation unit through the gaps between the upper and lower air ducts and the mounting surface.

[0054] Since the evaporator assembly 2 adopts a suspended structure, there is no need to set a support at the bottom, and the mounting plate on the top of the evaporator assembly 2 is located on the peripheral side of the evaporator itself. Therefore, except for the evaporator itself, there is no structure in the airborne evaporation duct 1 that can hinder the air outlet, which can effectively increase the heat exchange area and heat exchange efficiency, reduce the system wind resistance, and reduce the power consumption of the fan.

[0055] In one embodiment, when the aircraft is in a horizontal flight state, a preset angle is formed between the heat exchange bottom surface of the evaporator assembly 2 and the horizontal plane, so that the heat exchange bottom surface of the evaporator assembly 2 can form an inclined surface, which can increase the heat exchange bottom surface area of ​​the evaporator assembly 2 and improve the heat exchange efficiency. At the same time, the inclined evaporator assembly 2 can form a diversion effect for the condensed water generated on the evaporator assembly 2, so that the condensed water can be discharged along the fins in time, and flow back to the inner wall surface of the air duct body 3 more concentratedly, and flow along the inner wall surface to the return bay, and be discharged from the drain port 8, thereby reducing the defrosting time and improving the heat exchange efficiency.

[0056] In one embodiment, the preset angle is 25° to 65°. The larger the preset angle is, the more conducive it is to drainage. Under the same heat exchange capacity, the evaporation unit structure will become thinner and taller. Horizontal placement, that is, tilted at 0°, is not conducive to drainage and completely relies on the structure of the air duct itself for drainage. More wind-guiding and drainage structures are required, which is costly and unreliable to implement. In addition, the evaporation unit will be relatively wide and cannot make good use of the available installation space of the aircraft. Therefore, it is more reasonable to set the preset angle range between the heat exchange bottom surface of the evaporator assembly 2 and the horizontal plane to 25° to 65°. As a preferred embodiment, the preset angle is, for example, 30°.

[0057] In one embodiment, the air duct body 3 includes an upper guide wall 11 and a lower guide wall 12. When the aircraft is in a horizontal flight state, the vertical projection of the upper guide wall 11 is located within the projection range of the lower guide wall 12, and the heat exchange bottom surface decreases in height along the direction from the upper guide wall 11 to the lower guide wall 12.

[0058] In one embodiment, the airborne evaporation unit further includes an air outlet duct 13, and the evaporator assembly 2 is located between the airborne evaporation duct 1 and the air outlet duct 13, and the airborne evaporation duct 1, the evaporator assembly 2 and the air outlet duct 13 are sealed at the connection position. In this embodiment, the air outlet duct 13 has a circumferential connection flange, and the top circumferential side of the mounting groove 6 of the airborne evaporation duct 1 is also provided with a circumferential connection flange, and the structure of the circumferential connection flange matches the structure of the mounting plate 9 of the evaporator assembly 2. All three are provided with mounting holes, and after the three are aligned, they can be fixedly connected by bolts. Intersecting seals can be provided at the mating surfaces of the three to enhance the seal. The three share fasteners for fastening and connection, so the operation is simpler and the number and weight of fasteners can be reduced.

[0059] In one embodiment, a hanging structure 26 is provided on the outer wall of the airborne evaporation duct 1 and / or the air outlet duct 13. The hanging structure 26 includes hanging ears, so that the airborne evaporation unit can be installed in a hanging manner, and the angle and linear error are flexible and controllable, which can improve the installation efficiency of the whole machine.

[0060] In one embodiment, the airborne evaporation unit further includes an evaporation fan 14 and a one-way valve 15, wherein the evaporation fan 14 is connected to the air outlet duct 13, and the one-way valve 15 is connected to an end of the evaporation fan 14 away from the air outlet duct 13. The one-way valve 15 can ensure that when the airborne auxiliary cooling system uses multiple airborne evaporation units in parallel, the airflow inside the duct will not flow in the reverse direction.

[0061] In one embodiment, the top of the installation groove 6 is provided with an air pipe groove 16 and a liquid pipe groove 17, and the air pipe groove 16 and the liquid pipe groove 17 are U-shaped. The evaporator assembly 2 includes an air collecting pipe 24 and a liquid inlet pipe 25. The air collecting pipe 24 of the evaporator assembly 2 is installed and fixed through the air pipe groove 16, and the liquid inlet pipe 25 is installed and fixed through the liquid pipe groove 17. The air collecting pipe 24 and the liquid inlet pipe 25 are sealed with rubber parts with good heat resistance and corrosion resistance such as hydrogenated nitrile rubber. The sealing is required to be reliable to prevent condensed water from seeping along the pipeline. The ends of the air collecting pipe 24 and the liquid inlet pipe 25 are connected with quick connectors such as ferrule-type pipe joints, and other quick connectors with spherical bell mouth sealing methods can also be used as needed to facilitate pipe connection with other units of the airborne auxiliary cooling system.

[0062] In one embodiment, U-shaped convex ribs 18 are provided in the air pipe groove 16 and the liquid pipe groove 17 , and the deformation of the U-shaped convex ribs 18 can be further utilized to improve the sealing effect.

[0063] In one embodiment, a wind guiding and drainage structure 19 is provided in the air duct body 3, and the wind guiding and drainage structure 19 extends along the flow direction of the airflow. A water retaining structure 20 is provided on the windward side of the wind guiding and drainage structure 19 to prevent condensed water from flowing out of the air inlet 4 along the wind guiding and drainage structure 19.

[0064] The airborne evaporation duct adds an air guiding and drainage structure 19 inside the duct body 3, and sets a water retaining structure 20 on the windward side of the air guiding and drainage structure 19. The air guiding and drainage structure 19 can be used to receive condensed water dripping from the evaporator into the duct body 3, and the water retaining structure 20 can be used to prevent the condensed water from flowing out of the air inlet 4 along the air guiding and drainage structure 19, thereby effectively guiding the condensed water so that the condensed water can always be located inside the duct body 3, and converge from the inside of the duct body 3 to the drain port 8 at the bottom, and then flow out from the drain port 8, effectively preventing the condensed water from being directly discharged from the air inlet 4 of the evaporation duct, thereby improving the drainage effect of the condensed water.

[0065] When the condensed water is separated from the surface of the evaporator assembly 2 under the action of gravity, the condensed water at the edge of the evaporator assembly 2 flows along the inner wall of the air duct body 3 to the bottom return bay and gathers. The condensed water in the middle of the evaporator assembly 2 directly drips onto the wind guide and drainage structure 19, flows to the inner walls on both sides of the air duct under the action of the wind guide and drainage structure 19, and then gathers in the bottom return bay for discharge. The wind guide and drainage structure 19 designed in the middle of the air duct also has the function of guiding the air, which can effectively reduce the vortex phenomenon of the air duct gas, reduce the wind resistance, make the airflow distribution on the heat exchange surface of the evaporator more uniform, and improve the heat exchange efficiency.

[0066] In one embodiment, there are at least two wind guiding and drainage structures 19, and at least two wind guiding and drainage structures 19 are arranged at intervals along the flow direction of the airflow, which can form a continuous guiding effect on the airflow, and can receive condensed water from a larger area to prevent the condensed water from flowing out.

[0067] In one embodiment, the air duct body 3 includes an upper guide wall 11 and a lower guide wall 12, and there are at least two air guide structures 19. At least two air guide structures 19 are arranged at intervals along the direction from the upper guide wall 11 to the lower guide wall 12, and a multi-layer guide structure can be formed in the air duct body 3, which has a better guide effect and a better water blocking effect. The condensed water dripping from the middle of the evaporator assembly 2 can be more effectively guided to the inner wall of the air duct body 3 under the guiding action of the air guide structure 19, and flow along the inner wall of the air duct body 3 to the backwater bay, and then discharged from the drain outlet 8.

[0068] In one embodiment, a preset angle θ is formed between the guide surface of the air guide structure 19 and the vertical plane, and the preset angle θ is ≥ 30°, so that the condensed water can gather to one side along the inclined guide surface and flow to the inner wall surface of the air duct body 3 more quickly.

[0069] In one embodiment, the preset angle θ=90° can enable the wind guiding and drainage structure 19 to be expanded in the horizontal direction, which can not only form a more effective guiding effect on the airflow, but also form a more effective guiding effect on the condensed water.

[0070] In one embodiment, the wind guiding and drainage structure 19 extends horizontally to the side walls of the air duct body 3, so that a single wind guiding and drainage structure 19 can ensure a comprehensive and effective blocking effect on the condensed water in the area where the wind guiding and drainage structure 19 is located, and more effectively avoid the leakage of condensed water.

[0071] In one embodiment, the water retaining structure 20 and the wind guiding and drainage structure 19 extend in the same direction, and there is a preset distance between the water retaining structure 20 and the side wall of the air duct body 3. In this embodiment, the wind guiding and drainage structure 19 extends to the side walls of the air duct body 3 on both sides and contacts the side walls of the air duct body 3. When the condensed water flows to both sides under the blocking effect of the water retaining structure 20, since there is a preset distance between the water retaining structure 20 and the side walls of the air duct body 3 on both sides, there is no water retaining structure 20 to block it here, and the condensed water can flow along here to the side wall of the air duct body 3, and flow down along the side wall of the air duct body 3 to the backwater bay.

[0072] In one embodiment, the water retaining structure 20 extends in the same direction as the wind guiding structure 19, and the water retaining structure 20 extends to the side wall of the air duct body 3. A drainage channel 21 is formed between the water retaining structure 20 and the side wall of the air duct body 3. When the condensed water flows to the side wall of the air duct body 3, it can flow to the side wall of the air duct body 3 through the drainage channel 21, and flow downward along the side wall of the air duct body 3 to the backwater bay.

[0073] In one embodiment, the air duct body 3 includes an upper guide wall 11 and a lower guide wall 12. In the vertical cross section, the air guide and drainage structure 19 is an arc-shaped structure that is recessed toward the lower guide wall 12. The arc-shaped structure can make the air guide and drainage structure 19 have a better drainage effect.

[0074] In one embodiment, the air duct body 3 includes an upper guide wall 11 and a lower guide wall 12, and the water retaining structure 20 is a V-shaped baffle, one side wall of the V-shaped baffle is located on the side of the wind guide and drainage structure 19 close to the upper guide wall 11, and a guide groove is formed between the guide surface of the wind guide and drainage structure 19, and the other side wall of the V-shaped baffle is located on the side of the wind guide and drainage structure 19 close to the lower guide wall 12, and a guide groove is formed between the guide surface of the wind guide and drainage structure 19. The tip of the V-shaped baffle faces the airflow, which can play a role in guiding and equalizing the airflow. The guide groove formed by the V-shaped baffle and the wind guide and drainage structure 19 is used to collect condensed water accumulated from the wind guide and drainage structure 19, and the drainage channel 21 is used to discharge the condensed water in the guide groove in time. Since the wind guiding and drainage structure 19 is arranged along the air flow direction of the air inlet and adopts a V-shaped windward surface, the wind resistance is small, which can play a good role in guiding and balancing the wind flow. It can also effectively avoid the formation of vortices in the air duct, reduce the overall wind resistance of the air duct, and make the air flow velocity on the evaporator surface more uniform.

[0075] In one embodiment, both side walls of the V-shaped baffle are arc-shaped side walls, which can achieve a better airflow guiding effect, reduce airflow resistance, and improve airflow efficiency.

[0076] In one embodiment, the air guide and drainage structure 19 is an air guide and drainage plate, which is arranged inside the air duct body 3, connected to the inner walls on both sides of the air duct body 3, arranged along the air flow direction, and integrally formed with the air duct body 3 by 3D printing. The air guide and drainage plate can also be integrally formed with the air duct body 3 by other methods, such as integral injection molding.

[0077] The wind guide plates can be in the form of an arc-shaped plate structure, and their arrangement needs to ensure that when the aircraft is in a normal flight posture, the projections of all the wind guide plates on the horizontal plane can cover the projection of the evaporator on the horizontal plane, so that the condensed water dripping from the evaporator will not drip directly from the air inlet 4. At the same time, the wind guide plates can block the space between the air inlet 4 and the evaporator in the vertical direction in any normal flight posture of the aircraft, avoiding the problem of condensed water leakage at the air duct body 3.

[0078] In one embodiment, the annular stop structure 7 includes an annular baffle 22 arranged at the air inlet 4, and a backwater bay is formed between the annular baffle 22 and the air duct body 3. The backwater bay can play a good role in blocking and collecting water, so that after the condensed water flows down along the side wall of the air duct body 3, it will not be directly discharged from the air inlet 4, but will accumulate in the backwater bay, and then flow from the backwater bay to the drain port 8 at the bottom, and then be discharged from the drain port 8.

[0079] In one embodiment, the inner ring of the annular baffle 22 is provided with a guide ring 23, and the guide ring 23 extends to the inner side of the air duct body 3. On the one hand, the guide ring 23 can play a water-blocking effect, so that when the condensed water collected in the backwater bay shakes during the flight of the aircraft, it will be blocked by the guide ring 23 and cannot fly out of the backwater bay. On the other hand, it can play a diversion effect and reduce the wind resistance generated by the annular baffle 22.

[0080] In one embodiment, the guide ring 23 is an arc-shaped guide ring, and the end of the arc-shaped guide ring is bent toward the backwater bay.

[0081] In one embodiment, the guide ring 23 and the annular baffle 22 form an arc-shaped guide surface at the connection position, the end of the guide ring 23 extends toward the side where the air outlet 5 is located, and the extension length of the guide ring 23 covers the length of the backwater bay in this direction. This structure can ensure that the guide ring 23 has a better guide effect, and at the same time has a larger flow resistance range, which can more effectively prevent condensed water from splashing out of the evaporation air duct during the flight of the aircraft.

[0082] In one embodiment, the air duct body 3 forms a sinking groove at the position connected to the annular baffle 22, the guide ring 23 extends toward the air outlet 5 of the air duct body 3, the guide ring 23 covers the sinking groove, and there is a preset interval between the wall surface of the guide ring 23 facing the backwater bay and the wall surface of the air duct body 3. In this embodiment, since the inner diameter of the guide ring 23 is substantially consistent with the flow area of ​​the air inlet 4 of the air duct body 3, a larger air intake volume can be ensured, and the air intake effect is improved. At the same time, the guide ring 23 covers the sinking groove, which can better keep the condensed water in the sinking groove without splashing.

[0083] In one embodiment, when the aircraft is in a horizontal flight state, the annular baffle 22 is in a vertical state.

[0084] In one embodiment, the air duct body 3 includes an upper guide wall 11 and a lower guide wall 12, and the height of the annular baffle 22 decreases along the direction from the lower guide wall 12 to the upper guide wall 11. Since the condensed water gathers toward the bottom under the action of gravity, the amount of condensed water at the bottom is greater than the amount of condensed water at other positions, and the amount of condensed water at the top is the smallest. According to this feature, the height of the annular baffle 22 at different positions is designed, which can make the structural design of the annular baffle 22 more reasonable, and can reduce the overall area of ​​the annular baffle 22, reduce wind resistance, and improve the air intake effect.

[0085] In one embodiment, the inner ring of the annular baffle 22 is an elliptical structure, with the major axis in the vertical direction and the minor axis in the horizontal direction, and the width of the bottom of the annular baffle 22 is greater than the width of the top of the annular baffle 22 .

[0086] In one embodiment, the angle between the air inlet surface and the air outlet surface of the air duct body 3 is 10° to 90°, so that there is a certain angle between the air inlet 4 and the air outlet 5. This angle makes the angle between the air outlet surface and the horizontal plane consistent with the angle between the heat exchange surface of the evaporator assembly 2 and the horizontal plane when the air inlet surface is in a vertical state, and the inner wall of the installation groove 6 for installing the evaporator assembly 2 is smoothly connected to the inner wall of the air duct body 3, which can ensure that the wind resistance of the inner wall of the air duct is small and the airflow distribution on the heat exchange surface of the evaporator assembly 2 is uniform.

[0087] Preferably, the angle between the air inlet surface and the air outlet surface of the air duct body 3 is 60°.

[0088] Figure 6 and Fig.11The angles of the evaporation duct under two different extreme motion conditions are shown, when the nose of the aircraft is facing down 30° and when the nose of the aircraft is facing up 45° during takeoff, respectively. This is used to describe the drainage scheme under different working conditions. The angles corresponding to the flight attitudes of other aircraft are between the two, and the duct is at a better drainage angle. When the system is dehumidifying and defrosting, the condensed water drips down from the lower surface of the evaporator under the action of gravity, and drips onto the wind guide and drainage structure 19 and the inner wall of the duct. Fig.11 As shown in FIG. 1 , when the aircraft takes off, all condensed water drops onto the inner wall of the air duct, gathers in the low-lying area between the inner wall and the backwater bay, and is discharged through the drain port 8. Figure 6 As shown, when the aircraft nose is facing downward at a flight attitude of 30°, the air duct is at the angle shown in the figure, and the condensed water is blocked by the wind guide and drainage structure 19 and will not drip out from the air inlet 4.

[0089] The condensed water dripping from the evaporator onto the surface of the air guide and drainage structure 19 gathers at the root of the V-shaped groove of the V-shaped baffle, and is discharged to the inner wall of the air duct through the drainage channel 21 at the connection between the V-shaped groove and the inner wall of the air duct under the action of gravity. Together with other condensed water dripping onto the inner wall of the air duct, it flows down along the inner wall of the air duct to the bottom return water bay and is discharged through the drain outlet 8.

[0090] In one embodiment, the wind guiding and drainage structure 19 is formed integrally with the air duct body 3, which can have better structural performance and smaller wind resistance.

[0091] In one embodiment, there are at least two drainage outlets 8, and at least two drainage outlets 8 are arranged side by side, which can improve the drainage efficiency and ensure the drainage effect when the aircraft shakes during flight.

[0092] In one embodiment, the air inlet 4 adopts a circular structure, and the air outlet 5 adopts a rectangular structure that matches the shape of the evaporator assembly 2, which can ensure the matching effect between the airborne evaporation duct 1 and the air inlet structure and the evaporator assembly 2, and facilitate connection.

[0093] In this embodiment, the lower interface shape of the air outlet duct 13 is adapted to the shape of the evaporator assembly 2, the top interface shape is adapted to the shape of the fan channel, and the vertical distance from the evaporator fan 14 to the surface of the evaporator assembly 2 is roughly the radius of the evaporator fan 14.

[0094] When the onboard auxiliary cooling system is working, the cabin air enters the onboard evaporation unit through the air inlet 4 of the air inlet duct, passes through the evaporator assembly 2 for cooling after passing through the air guide structure 19, and then flows through the evaporator fan 14 and the one-way valve 15 in turn after passing through the air outlet duct 13 to enter the cabin, forming a cycle to achieve the purpose of air conditioning.

[0095] According to an embodiment of the present application, an airborne auxiliary cooling system includes an airborne evaporation unit, and the airborne evaporation unit is the airborne evaporation unit described above.

[0096] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0097] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An airborne evaporation duct, characterized in that: The invention comprises an air duct body (3) and an air guiding and drainage structure (19) arranged in the air duct body (3); an air inlet (4) is arranged at the bottom of the air duct body (3); an annular stop structure (7) is arranged at the air inlet (4); the annular stop structure (7) is used to stop condensed water flowing through the inner wall of the air duct body (3); a drain outlet (8) is arranged at the bottom of the air duct body (3) close to the annular stop structure (7); the air guiding and drainage structure (19) extends along the flow direction of the air flow; and a water retaining structure (20) is arranged on the windward side of the air guiding and drainage structure (19) to prevent condensed water from flowing out of the air inlet (4) along the air guiding and drainage structure (19); The wind guiding and drainage structure (19) extends horizontally to the side walls of both sides of the air duct body (3); The air duct body (3) comprises an upper guide wall (11) and a lower guide wall (12); in a vertical cross section, the air guide and drainage structure (19) is an arc-shaped structure that is recessed toward the lower guide wall (12).

2. The airborne evaporation duct according to claim 1, characterized in that: There are at least two wind-guiding and drainage structures (19), and at least two of the wind-guiding and drainage structures (19) are arranged at intervals along the flow direction of the airflow; and / or, the air duct body (3) comprises an upper guide wall (11) and a lower guide wall (12), and there are at least two wind-guiding and drainage structures (19), and at least two of the wind-guiding and drainage structures (19) are arranged at intervals along the direction from the upper guide wall (11) to the lower guide wall (12).

3. The airborne evaporation duct according to claim 1, characterized in that: A preset angle is formed between the guide surface of the wind and flow guiding structure (19) and the vertical plane, and the preset angle θ is ≥ 30°.

4. The airborne evaporation duct according to claim 3, characterized in that: The preset angle θ=90°.

5. The airborne evaporation duct according to claim 1, characterized in that: The water retaining structure (20) and the wind guiding and drainage structure (19) extend in the same direction, and a preset spacing is provided between the water retaining structure (20) and the side wall of the air duct body (3); or, the water retaining structure (20) and the wind guiding and drainage structure (19) extend in the same direction, the water retaining structure (20) extends to the side wall of the air duct body (3), and a drainage channel (21) is formed between the water retaining structure (20) and the side wall of the air duct body (3).

6. The airborne evaporation duct according to claim 1, characterized in that: The air duct body (3) comprises an upper guide wall (11) and a lower guide wall (12); the water retaining structure (20) is a V-shaped baffle; one side wall of the V-shaped baffle is located on a side of the air guide and drainage structure (19) close to the upper guide wall (11), and forms a guide groove between the side wall and the guide surface of the air guide and drainage structure (19); the other side wall of the V-shaped baffle is located on a side of the air guide and drainage structure (19) close to the lower guide wall (12), and forms a guide groove between the side wall and the guide surface of the air guide and drainage structure (19).

7. The airborne evaporation duct according to claim 6, characterized in that: Both side walls of the V-shaped baffle are arc-shaped side walls.

8. The airborne evaporation duct according to claim 1, characterized in that: The annular stop structure (7) comprises an annular baffle (22) arranged at the air inlet (4), and a backwater bay is formed between the annular baffle (22) and the air duct body (3).

9. The airborne evaporation duct according to claim 8, characterized in that: The inner ring of the annular baffle (22) is provided with a guide ring (23), and the guide ring (23) extends toward the inside of the air duct body (3).

10. The airborne evaporation duct according to claim 9, characterized in that: The guide ring (23) is an arc-shaped guide ring (23), and the end of the arc-shaped guide ring (23) is bent toward the backwater bay.

11. The airborne evaporation duct according to claim 9, characterized in that: The guide ring (23) and the annular baffle (22) form an arc-shaped guide surface at the connection position, the end of the guide ring (23) extends toward the side where the air outlet (5) is located, and the extension length of the guide ring (23) covers the length of the backwater bay in this direction.

12. The airborne evaporation duct according to claim 9, characterized in that: The air duct body (3) forms a sunken groove at a position connected to the annular baffle (22); the guide ring (23) extends toward the air outlet (5) of the air duct body (3); the guide ring (23) covers the sunken groove; and there is a preset gap between the wall surface of the guide ring (23) facing the backwater bay and the wall surface of the air duct body (3).

13. The airborne evaporation duct according to claim 12, characterized in that: The preset interval is greater than or equal to 2 mm and less than or equal to 5 mm.

14. The airborne evaporation duct according to claim 8, characterized in that: When the aircraft is in a horizontal flight state, the annular baffle (22) is in a vertical state.

15. The airborne evaporation duct according to claim 8, characterized in that: The air duct body (3) comprises an upper guide wall (11) and a lower guide wall (12), and the height of the annular baffle (22) decreases along the direction from the lower guide wall (12) to the upper guide wall (11).

16. The airborne evaporation duct according to claim 1, characterized in that: The angle between the air inlet surface and the air outlet surface of the air duct body (3) is 10° to 90°.

17. The airborne evaporation duct according to claim 16, characterized in that: The angle between the air inlet surface and the air outlet surface of the air duct body (3) is 60°.

18. The airborne evaporation duct according to any one of claims 1 to 17, characterized in that: An installation groove (6) for installing an evaporator is provided at the air outlet (5) of the air duct body (3).

19. The airborne evaporation duct according to claim 18, characterized in that: The depth of the mounting groove (6) is greater than or equal to the thickness of the evaporator.

20. The airborne evaporation duct according to claim 18, characterized in that: The groove wall of the installation groove (6) is smoothly transitionally connected to the inner wall surface of the air duct body (3).

21. The airborne evaporation duct according to claim 18, characterized in that: When the aircraft is in a horizontal flight state, a preset angle is formed between the mounting surface (10) of the mounting groove (6) and the horizontal plane.

22. The airborne evaporation duct according to claim 18, characterized in that: An air pipe groove (16) and a liquid pipe groove (17) are provided at the top of the installation groove (6), and the air pipe groove (16) and the liquid pipe groove (17) are U-shaped.

23. The airborne evaporation duct according to claim 22, characterized in that: U-shaped convex ribs (18) are arranged in the air pipe groove (16) and the liquid pipe groove (17).

24. The airborne evaporation duct according to claim 1, characterized in that: The cross-sectional shape of the air duct body (3) transitions from a circle to a rectangle along the direction from the air inlet (4) to the air outlet (5).

25. The airborne evaporation duct according to any one of claims 1 to 17, characterized in that: The wind guiding and flow diversion structure (19) is integrally formed with the air duct body (3).

26. The airborne evaporation duct according to any one of claims 1 to 17, characterized in that: There are at least two drainage openings (8), and at least two drainage openings (8) are arranged side by side.

27. An airborne auxiliary cooling system, comprising an airborne evaporative air duct, characterized in that: The airborne evaporation duct is the airborne evaporation duct according to any one of claims 1 to 26.

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