Aircraft air conditioning evaporative duct and airborne auxiliary cooling system

Abstract

The present application provides an airborne air conditioning evaporative duct and an airborne auxiliary cooling system. The airborne air conditioning evaporative duct comprises an air duct body (1), and a blade is arranged at an air inlet (2) of the air duct body (1). The blade can flip relative to the air duct body (1), and the blade opens the air inlet (2) when the air duct body (1) takes in air, and closes the air inlet (2) when the air duct body (1) stops taking in air. According to the airborne air conditioning evaporative duct of the present application, condensed water generated by the evaporator can be effectively discharged, and the condensed water can be prevented from flying out of the air duct due to the influence of the flight attitude of the aircraft, thereby improving the reliability of drainage.

Description

Technical Field

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

[0002] The airborne auxiliary cooling system is an aircraft auxiliary cooling system. Different from the aircraft environmental control system, the airborne auxiliary cooling system adopts conventional fluorine refrigeration solutions such as compressors and heat exchangers. The evaporator is one of the four essential components of the airborne evaporative cycle refrigeration system. It adopts evaporative refrigeration cycle technology to cool the air by evaporating the refrigerant in the evaporator.

[0003] During the working process, the temperature of the evaporator is low, and condensed water is continuously generated. Due to the low evaporation temperature, the condensed water will frost and affect the heat exchange, and the refrigeration effect will decrease. Therefore, the evaporator needs to be defrosted regularly, and then the water needs to be discharged centrally and cannot enter the cabin. For the refrigeration system, common condensed water discharge methods include: gravity self-flow method, water seal method, and mechanical lifting method. However, due to space limitations on the aircraft, tight electricity consumption, the size of the evaporator cannot be too large, and the aircraft's flight attitude is uncontrollable. Traditional methods cannot effectively remove the condensed water generated by the evaporator. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide an airborne air conditioning evaporative duct and an airborne auxiliary cooling system, which can effectively discharge the condensed water generated by the evaporator, prevent the condensed water from flying out of the duct due to the flight attitude of the aircraft, and improve the drainage reliability.

[0005] In order to solve the above problems, the present application provides an air-borne air-conditioning evaporative duct, including a duct body, wherein blades are arranged at the air inlet of the duct body, and the blades can be flipped relative to the duct body. The blades open the air inlet when the duct body takes in air, and close the air inlet when the duct body stops taking in air.

[0006] Preferably, a pivot is provided at the air inlet, and the blades include a first blade and a second blade, the first blade and the second blade are pivotally connected to the pivot, and can open the air inlet when the air duct body takes in air, and close the air inlet when the air duct body stops taking in air.

[0007] Preferably, the air inlet of the air duct body is provided with a magnet, the first blade and the second blade are made of magnetic material, and the first blade and the second blade can be attracted to the magnet when closing the air inlet.

[0008] Preferably, a magnet or a magnetic part is provided on the first blade, and a magnetic part or a magnet is correspondingly provided at the air inlet. When the first blade closes the air inlet, the magnet and the magnetic part are attracted to each other, or the magnetic part and the magnet are attracted to each other; and / or, a magnet or a magnetic part is provided on the second blade, and a magnetic part or a magnet is correspondingly provided at the air inlet. When the second blade closes the air inlet, the magnet and the magnetic part are attracted to each other, or the magnetic part and the magnet are attracted to each other.

[0009] Preferably, an annular rib is provided at the air inlet, and a flexible sealing ring is provided on the side of the annular rib facing the first blade and the second blade. When the first blade and the second blade close the air inlet, the first blade and the second blade are sealed with the flexible sealing ring.

[0010] Preferably, the first blade and the second blade include movable ends, and limiting columns are arranged on the inner wall of the air duct body. The movable ends of the first blade and the second blade are retracted when the air duct body takes in air, and are stopped on both sides of the limiting columns, thereby guiding the air intake of the air duct body.

[0011] Preferably, when the movable ends of the first blade and the second blade are folded on both sides of the limiting column, the distance between the first blade and the second blade increases gradually along the direction away from the pivot.

[0012] Preferably, the pivot end of the first blade is provided with a first step, and the pivot end of the second blade is provided with a second step. When the first blade and the second blade close the air inlet, the first step and the second step are spliced ​​together to form a Z-shaped splicing structure.

[0013] Preferably, an elastic return member is provided between the first blade and the second blade, and the elastic return member can apply an elastic force to the first blade and the second blade to close the air inlet.

[0014] Preferably, an evaporator mounting position is provided on the top of the air duct body, the evaporator mounting position is vertically arranged, and the mounting surface of the evaporator mounting position forms an angle of 25° to 35° relative to the plane.

[0015] Preferably, a drainage joint is provided at the bottom of the air duct body.

[0016] According to another aspect of the present application, an airborne auxiliary cooling system is provided, comprising an airborne air conditioning evaporative air duct, wherein the airborne air conditioning evaporative air duct is the airborne air conditioning evaporative air duct mentioned above.

[0017] The airborne air conditioning evaporative duct provided by the present application comprises an air duct body, and a blade is arranged at the air inlet of the air duct body, and the blade can be flipped relative to the air duct body, and the blade opens the air inlet when the air duct body is inletting air, and closes the air inlet when the air duct body stops inletting air. The airborne air conditioning evaporative duct is provided with a flippable blade at the air inlet, and can open the air inlet when the air is inletting air, and close the air inlet when the air is not inletting air. Therefore, when the airborne air conditioning evaporative duct is inletting air, the blade can be used to guide the air inlet, avoid blocking the air inlet, and improve the air inlet efficiency. When the air inlet stops, the air outlet is completely blocked, so that the aircraft can reliably drain water in various flight postures, and water will not flow out of the air inlet in any flight posture. At the same time, when the airborne equipment is shut down, the air inlet is closed, which can effectively prevent the airborne air conditioning evaporative duct from being dirty and blocked when the airborne equipment is shut down. In addition, the blade can replace the one-way valve in the airborne equipment, making the equipment structure more compact and lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional structural diagram of an air-conditioning evaporation duct of an aircraft according to an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the structure of an air-conditioning evaporation duct in an embodiment of the present application;

[0020] Figure 3 for Figure 2 BB-direction cross-sectional structural diagram;

[0021] Figure 4 This is a schematic diagram of the structure of an air-conditioning evaporation duct in an embodiment of the present application;

[0022] Figure 5 for Figure 4 Schematic diagram of the CC-section structure;

[0023] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at L.

[0024] The reference numerals are as follows:

[0025] 1. Air duct body; 2. Air inlet; 3. Pivot; 4. First blade; 5. Second blade; 6. Magnet; 7. Magnetic part; 8. Annular rib; 9. Flexible sealing ring; 10. Limiting column; 11. First step; 12. Second step; 13. Evaporator installation position; 14. Drain connector. DETAILED DESCRIPTION

[0026] See also Figures 1 to 6As shown, according to an embodiment of the present application, the onboard air-conditioning evaporative duct includes a duct body 1, and blades are provided at the air inlet 2 of the duct body 1. The blades can be flipped relative to the duct body 1. The blades open the air inlet 2 when the duct body 1 takes in air, and close the air inlet 2 when the duct body 1 stops taking in air.

[0027] The onboard air-conditioning evaporative air duct is provided with flippable blades at the air inlet 2, which can open the air inlet 2 when air is entering, and close the air inlet 2 when air is not entering. Therefore, when air is entering the onboard air-conditioning evaporative air duct, the blades can be used to guide the incoming air to avoid obstruction to the incoming air and improve the air intake efficiency. When the air intake is stopped, the air outlet is completely blocked, so that the aircraft can drain water reliably in various flight attitudes, and water will not flow out of the air inlet 2 in any flight attitude. At the same time, when the onboard equipment is shut down, the air inlet 2 can be closed, which can effectively prevent the onboard air-conditioning evaporative air duct from being dirty and blocked when the onboard equipment is shut down.

[0028] In the traditional auxiliary cooling system, there are two evaporative air ducts for the air conditioner onboard, one for backup and the other for simultaneous use. However, to ensure that one is in normal use when the other is not in use, a one-way valve needs to be installed above the fan to close the air duct when one is shut down to prevent cold air from going out of the air inlet 2 of the other. Because the present application designs rotatable blades in front of the air inlet 2, the air inlet 2 can be directly closed when the unit is shut down, so that the one-way valve can be eliminated, making the unit structure more compact and lighter.

[0029] In one embodiment, a pivot 3 is provided at the air inlet 2, and the blades include a first blade 4 and a second blade 5, which are pivotally connected to the pivot 3 and can open the air inlet 2 when the air duct body 1 is inletting air, and close the air inlet 2 when the air duct body 1 stops inletting air. In this embodiment, since the cross-section of the air inlet of the evaporative air duct of the onboard air conditioner is generally circular, the blade is divided into two semicircular blades, which can make it easier to design and install the structure of the blade, and can make the two blades form a good match with the air inlet when they are assembled, so as to ensure the sealing effect between the blade and the air inlet, and more effectively prevent condensed water from flowing out of the air inlet 2. In addition, the structure of the two blades matching can reduce the difficulty of setting the pivot 3, and it is easier to realize the rotation control of the blades, reducing the control difficulty.

[0030] In one embodiment, when the onboard air conditioning evaporative duct is working, the fan starts to rotate to form suction, and the first blade 4 and the second blade 5 open under the suction force generated by the fan, so that the air can smoothly enter the duct body 1 through the air inlet 2 to complete the air supply work; when the onboard air conditioning evaporative duct stops working, the first blade 4 and the second blade 5 can close the air inlet 2, so that the condensed water dripping on the evaporator cannot flow out from the air inlet 2, thereby ensuring that the onboard air conditioning evaporative duct can effectively discharge the condensed water generated by the evaporator, avoiding the condensed water from flying out of the duct due to the flight attitude of the aircraft, and improving the drainage reliability.

[0031] In one embodiment, an annular rib 8 is provided at the air inlet 2, and a magnet 6 is provided on the annular rib 8 at the air inlet 2 of the air duct body 1. The first blade 4 and the second blade 5 are made of magnetic material. When the first blade 4 and the second blade 5 close the air inlet 2, they can be attracted to the magnet 6.

[0032] In one embodiment, a magnet 6 or a magnetic part 7 is provided on the first blade 4, an annular rib 8 is provided at the air inlet 2, and a magnetic part 7 or a magnet 6 is correspondingly provided on the annular rib 8 at the air inlet 2 of the air duct body 1. When the first blade 4 closes the air inlet 2, the magnet 6 is attracted to the magnetic part 7, or the magnetic part 7 is attracted to the magnet 6.

[0033] In one embodiment, a magnet 6 or a magnetic part 7 is provided on the second blade 5, an annular rib 8 is provided at the air inlet 2, and a magnetic part 7 or a magnet 6 is correspondingly provided on the annular rib 8 at the air inlet 2 of the air duct body 1. When the second blade 5 closes the air inlet 2, the magnet 6 is attracted to the magnetic part 7, or the magnetic part 7 is attracted to the magnet 6.

[0034] By inlaying magnetic matching structures that can attract each other on the blades and the annular rib 8 at the air inlet 2, when the unit is shut down, the blades and the annular rib 8 can be reliably fitted together through the magnetic matching structure, which can ensure that the structure is stable when the blades close the air inlet 2, and the air inlet 2 will not open easily, thereby ensuring the reliability of the closure of the air inlet 2 and effectively preventing condensation water from flowing out of the air inlet 2.

[0035] In one embodiment, an annular rib 8 is provided at the air inlet 2, and a flexible sealing ring 9 is provided on one side of the annular rib 8 facing the first blade 4 and the second blade 5. When the first blade 4 and the second blade 5 close the air inlet 2, the first blade 4 and the second blade 5 are sealed and fitted with the flexible sealing ring 9. In this embodiment, by providing the flexible sealing ring 9, a better sealing effect can be achieved when the blades and the annular rib 8 fit together.

[0036] In one embodiment, the first blade 4 and the second blade 5 include movable ends, and a limiting column 10 is provided on the inner wall of the air duct body 1. The movable ends of the first blade 4 and the second blade 5 are folded when the air duct body 1 is inlet, and are stopped on both sides of the limiting column 10, thereby guiding the air inlet of the air duct body 1. In this embodiment, by providing the limiting column 10, when the air duct body 1 is inlet, the blades can only rotate to the position of the limiting column 10, thereby achieving the effect of guiding and equalizing the air flow.

[0037] In addition, the presence of the limit column 10 can also enable the first blade 4 and the second blade 5 to always remain in an open state after being folded. When the fan reverses, the first blade 4 and the second blade 5 can be more conveniently unfolded under the action of wind and quickly rotated to the annular retaining edge 8 to close the air inlet 2, thereby conveniently achieving the closure of the air inlet 2 without the need for an additional driving mechanism.

[0038] In one embodiment, when the movable ends of the first blade 4 and the second blade 5 are folded on both sides of the limiting column 10, the spacing between the first blade 4 and the second blade 5 increases in the direction away from the pivot 3. In this embodiment, by providing the limiting column 10, the first blade 4 and the second blade 5 can be further formed in a form of increasing spacing in the direction away from the pivot 3, which is more convenient for rotating and driving the first blade 4 and the second blade 5 when the fan is reversed, improving the reaction speed of the first blade 4 and the second blade 5, and ensuring the closing speed of the air inlet 2.

[0039] In one embodiment, the pivot end of the first blade 4 is provided with a first step 11, and the pivot end of the second blade 5 is provided with a second step 12. When the first blade 4 and the second blade 5 close the air inlet 2, the first step 11 and the second step 12 are spliced ​​together to form a Z-shaped splicing structure. In this embodiment, after the first blade 4 and the second blade 5 close the air inlet 2, there will be a gap between the two blades. There will be a first step 11 on the first blade 4, and there will be a second step 12 on the second blade 5. The two steps just fit together, and then the middle gap becomes a Z-shaped gap. At this time, even if water hits the blade, the water will not flow out from this middle gap, which further improves the sealing reliability of the blade to the air inlet 2.

[0040] In one embodiment, an elastic return member is provided between the first blade 4 and the second blade 5, and the elastic return member can apply an elastic force to the first blade 4 and the second blade 5 to close the air inlet 2. In this embodiment, when the fan stops, under the elastic force of the elastic return member, it can also effectively ensure that the first blade 4 and the second blade 5 can close the air inlet 2. In order to ensure the sealing performance of the first blade 4 and the second blade 5 to the air inlet 2, when the first blade 4 and the second blade 5 close the air inlet 2, the elastic return member can still apply an elastic pre-tightening force to the first blade 4 and the second blade 5, pressing the first blade 4 and the second blade 5 against the annular retaining edge 8.

[0041] In one embodiment, an evaporator mounting position 13 is disposed on the top of the air duct body 1 . The evaporator mounting position 13 is disposed vertically, and a mounting surface of the evaporator mounting position 13 forms an angle of 25° to 35° relative to a plane.

[0042] In one embodiment, a drainage joint 14 is provided at the bottom of the air duct body 1 .

[0043] When the unit is running, the fan is turned on, the first blade 4 and the second blade 5 are sucked apart, and the blades are limited to a preset position by the limit column 10. This position can guide the wind, making the wind distribution on the evaporator more uniform, and improving the heat exchange effect of the evaporator. After the unit has been running for a period of time, because the evaporation temperature will reach about -10°C, the evaporator is more likely to frost. When the frost reaches a certain thickness, it affects the refrigeration effect of the unit. At this time, defrosting is required. During defrosting, the program sets the fan to reverse, and the wind blows onto the first blade 4 and the second blade 5. The first blade 4 and the second blade 5 rotate to close the air inlet 2. The fan reversal can make the defrosted water flow away faster.

[0044] A flexible sealing ring 9 is installed on the edge of the annular rib 8 of the air inlet 2 to ensure the sealing of the edges of the blades and the annular rib 8, ensuring that the water is completely sealed in the air duct body 1 during defrosting and can only be discharged through the drain port. Regardless of the flight state of leaning forward, backward, or left or right, water will not flow out of the air inlet 2, ensuring reliable drainage in various flight states.

[0045] When the unit is shut down, the program sets the fan to reverse and close the first blade 4 and the second blade 5. When the blades are closed, they are magnetically attracted to the annular rib 8 to ensure that the blades are always in a closed state after the unit fan is shut down, that is, the air inlet 2 is closed. In this way, when the unit is shut down and on standby, dust and other foreign matter in the environment cannot enter the air duct through the air inlet 2, which can ensure the cleanliness of the air duct, delay the dirt and blockage time of the evaporator, and make the maintenance interval longer.

[0046] According to an embodiment of the present application, the onboard auxiliary cooling system includes an onboard air-conditioning evaporative air duct, which is the onboard air-conditioning evaporative air duct mentioned above.

[0047] 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.

[0048] 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 air-conditioning evaporation duct for an aircraft, characterized in that: The air duct body (1) comprises a blade disposed at an air inlet (2) of the air duct body (1), the blade being capable of flipping relative to the air duct body (1), the blade opening the air inlet (2) when the air duct body (1) is letting in air, and closing the air inlet (2) when the air duct body (1) stops letting in air; A pivot (3) is provided at the air inlet (2), and the blades include a first blade (4) and a second blade (5), the first blade (4) and the second blade (5) are pivotally connected to the pivot (3), and are capable of opening the air inlet (2) when the air duct body (1) is letting in air, and closing the air inlet (2) when the air duct body (1) stops letting in air; The pivot end of the first blade (4) is provided with a first step (11), and the pivot end of the second blade (5) is provided with a second step (12); when the first blade (4) and the second blade (5) close the air inlet (2), the first step (11) and the second step (12) are spliced ​​together to form a Z-shaped splicing structure; A drainage joint (14) is provided at the bottom of the air duct body (1).

2. The air-conditioning evaporative air duct according to claim 1, characterized in that: The air inlet (2) of the air duct body (1) is provided with a magnet (6); the first blade (4) and the second blade (5) are made of magnetic material; and when the first blade (4) and the second blade (5) close the air inlet (2), they can be attracted to the magnet (6).

3. The air-conditioning evaporative air duct according to claim 1, characterized in that: The first blade (4) is provided with a magnet (6), and the air inlet (2) is provided with a corresponding magnetic part (7); or the first blade (4) is provided with a magnetic part (7), and the air inlet (2) is provided with a magnet (6); when the first blade (4) closes the air inlet (2), the magnet (6) and the magnetic part (7) are attracted, or the magnetic part (7) and the magnet (6) are attracted; and / or, the second blade (5) is provided with a magnet (6), and the air inlet (2) is provided with a corresponding magnetic part (7); or the second blade (5) is provided with a magnetic part (7), and the air inlet (2) is provided with a magnet (6); when the second blade (5) closes the air inlet (2), the magnet (6) and the magnetic part (7) are attracted, or the magnetic part (7) and the magnet (6) are attracted.

4. The air-conditioning evaporative air duct according to claim 1, characterized in that: An annular rib (8) is provided at the air inlet (2), and a flexible sealing ring (9) is provided on the side of the annular rib (8) facing the first blade (4) and the second blade (5); when the first blade (4) and the second blade (5) close the air inlet (2), the first blade (4) and the second blade (5) are in sealing contact with the flexible sealing ring (9).

5. The air-conditioning evaporative air duct according to claim 1, characterized in that: The first blade (4) and the second blade (5) comprise movable ends. A limiting column (10) is provided on the inner wall of the air duct body (1). When air enters the air duct body (1), the movable ends of the first blade (4) and the second blade (5) are retracted and stopped on both sides of the limiting column (10), thereby guiding the air entering the air duct body (1).

6. The onboard air conditioning evaporative air duct according to claim 5, characterized in that: When the movable ends of the first blade (4) and the second blade (5) are folded together on both sides of the limiting column (10), the distance between the first blade (4) and the second blade (5) increases gradually in a direction away from the pivot (3).

7. The air-conditioning evaporative air duct according to claim 1, characterized in that: An elastic return member is provided between the first blade (4) and the second blade (5), and the elastic return member is capable of exerting an elastic force on the first blade (4) and the second blade (5) to close the air inlet (2).

8. The air-conditioning evaporative air duct according to claim 1, characterized in that: An evaporator mounting position (13) is arranged at the top of the air duct body (1); the evaporator mounting position (13) is arranged vertically, and a mounting surface of the evaporator mounting position (13) forms an angle of 25° to 35° relative to a plane.

9. An airborne auxiliary cooling system, comprising an airborne air conditioning evaporative air duct, characterized in that: The onboard air conditioning evaporative air duct is the onboard air conditioning evaporative air duct according to any one of claims 1 to 8.

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