A de-icing device for the air inlet of an auxiliary power unit

Abstract

A de-icing device for an auxiliary power unit air inlet includes: a partition plate that divides the auxiliary power unit air inlet, an air supply passage formed inside the partition plate, and the air supply passage opening near the upper edge of the partition plate; and a flexible member capable of flexible deformation that covers the upper edge of the partition plate, the flexible member expanding and deforming as air flows into the space between the partition plate and the flexible member through the air supply passage.

Description

Technical Field

[0001] This utility model relates to a de-icing device for the air inlet of an auxiliary power unit. Background Technology

[0002] The auxiliary power unit (hereinafter sometimes referred to as APU) is a power unit on an aircraft other than the main power unit. It is usually a small gas turbine engine, mainly used to independently supply electricity and compressed air when the main engine of an aircraft, such as an airplane, is not working or cannot provide sufficient power, so as to ensure the normal operation of the aircraft and the ventilation and air conditioning supply in the cabin.

[0003] Currently, APUs are widely used in the civil aviation field, and are installed on all large civil transport aircraft. An APU includes an air intake for introducing outside air into its combustion chamber. To facilitate the introduction of outside air, the air intake is usually located near the aircraft skin and can directly communicate with the outside without being obstructed by the air intake valve.

[0004] Therefore, in icy and snowy weather, ice, snow or cold water can easily fall near the air intake of the APU and accumulate further, blocking the air intake. This reduces the amount of air introduced from the APU's air intake, causing adverse conditions such as surge or shutdown of the APU, affecting the normal operation of the aircraft and the comfort of the cabin.

[0005] Therefore, timely de-icing of the APU air inlet is crucial for the safe flight of the aircraft and the comfort of passengers in the cabin, but current research on de-icing devices for APU air inlets is relatively insufficient. Utility Model Content

[0006] This utility model was made in view of the above-mentioned problems, and its purpose is to provide a de-icing device for removing ice and snow near the air intake of an APU.

[0007] To achieve the above objectives, this utility model provides a de-icing device for the air inlet of an auxiliary power unit, comprising: a partition plate that divides the air inlet of the auxiliary power unit, an air supply path formed inside the partition plate, and the air supply path opening near the upper edge of the partition plate; and a flexible member capable of flexible deformation, the flexible member covering the upper edge of the partition plate, the flexible member expanding and deforming as air flows into the space between the partition plate and the flexible member through the air supply path.

[0008] According to the present invention, a de-icing device for the air inlet of an auxiliary power unit utilizes a flexible component to cover the vicinity of the upper edge of a partition plate in the air inlet of the auxiliary power unit. Air is introduced between the flexible component and the partition plate, causing the flexible component to expand and deform. This allows ice and snow adhering to and accumulating near the upper edge of the partition plate to be shaken off. Furthermore, the ice layer condensed near the upper edge of the partition plate is broken off as the flexible component expands and deforms, thus improving the de-icing effect. In addition, since the airflow path between the flexible component and the partition plate is formed within the partition plate, there is no need for additional air inlet pipes, reducing the number of components and thus lowering the device cost.

[0009] Furthermore, in the de-icing device of the auxiliary power unit air inlet of this utility model, it is preferable that the air entering between the partition plate and the flexible member can be discharged to allow the flexible member to contract and deform.

[0010] According to the de-icing device of the auxiliary power unit's air inlet with the above structure, the flexible component can contract as air is discharged from between the flexible component and the partition plate. Thus, the flexible component can repeatedly expand and contract with the entry and exit of air, allowing for multiple de-icing operations to prevent ice and snow accumulation from clogging the air inlet, especially in situations where the auxiliary power unit needs to operate for extended periods in icy or snowy weather.

[0011] Furthermore, in the de-icing device of the auxiliary power unit air inlet of this utility model, it is preferred to include a connector, the flexible member being connected to the partition plate through the connector, and an exhaust flow path being formed in the connector, so that the air between the partition plate and the flexible member can be discharged from the exhaust flow path.

[0012] Furthermore, in the de-icing device of the auxiliary power unit air inlet of this utility model, it is preferable to further include a nozzle, which is disposed near the upper edge of the partition plate, and the air discharged from the exhaust flow path can be ejected from the nozzle.

[0013] According to the de-icing device at the air inlet of the auxiliary power unit with the above structure, air discharged from between the flexible member and the partition plate is discharged through an exhaust flow path formed in the connector connecting the two, and the discharged air can be sprayed in multiple directions through nozzles provided near the upper edge of the partition plate. This allows the nozzles to blow away ice and snow near the upper edge of the partition plate, thereby further removing ice and snow and improving the de-icing effect. Furthermore, during the air jetting process, falling ice, snow, or low-temperature water can be blown away, thereby preventing ice and snow from adhering to the area near the upper edge of the partition plate.

[0014] Furthermore, in the de-icing device of the auxiliary power unit air inlet of this utility model, it is preferable that the nozzle has multiple different spray directions.

[0015] Furthermore, in the de-icing device for the air inlet of the auxiliary power unit of this utility model, preferably, a plurality of nozzles are provided in the direction extending from the upper edge of the partition plate.

[0016] The de-icing device at the air inlet of the auxiliary power unit, according to the above structure, has nozzles capable of spraying air in multiple directions, and multiple nozzles are provided along the extending direction of the upper edge of the partition plate. This increases the blowing range of the nozzles, further improving the de-icing effect.

[0017] Furthermore, in the de-icing device of the auxiliary power unit air inlet of this utility model, it is preferable that the air entering between the partition plate and the flexible component is high-temperature and high-pressure air.

[0018] Furthermore, in the de-icing device of the auxiliary power unit air inlet of this utility model, preferably, the auxiliary power unit includes an airflow path for supplying the high-temperature, high-pressure airflow.

[0019] The de-icing device at the air inlet of the auxiliary power unit includes an air intake branch, which connects the air intake path and the air supply path.

[0020] Furthermore, in the de-icing device of the auxiliary power unit air inlet of this utility model, it is preferable that the induced air branch and the induced air flow path are connected via a valve.

[0021] The de-icing device at the air inlet of the auxiliary power unit, as described above, can extract a portion of the high-temperature, high-pressure air originally supplied by the auxiliary power unit and use it for de-icing as needed. This eliminates the need for additional equipment specifically designed to supply air to the de-icing unit, reducing equipment costs.

[0022] (Utility Model Effect)

[0023] According to this invention, by covering the upper edge of the partition plate in the air inlet of the auxiliary power unit with a flexible component and introducing air between the flexible component and the partition plate, the flexible component expands and deforms. This allows ice and snow adhering to and accumulating near the upper edge of the partition plate to be shaken off. Furthermore, the ice layer condensed near the upper edge of the partition plate is broken off as the flexible component expands and deforms, improving the de-icing effect. In addition, the air entering between the flexible component and the partition plate can be discharged through the exhaust path and nozzle, allowing the discharged air to sweep away the adhering ice and snow while the flexible component repeatedly expands and contracts, further improving the de-icing effect. Moreover, the air entering and exiting between the flexible component and the partition plate is high-temperature, high-pressure air branched from the air intake path of the auxiliary power unit. This high-temperature, high-pressure air further enhances the de-icing effect without requiring additional air supply equipment, reducing device costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the APU mounting structure.

[0025] Figure 2 This is a perspective view showing the damper frame structure of the de-icing device according to an embodiment.

[0026] Figure 3 It is Figure 2 The diagram shown in enlarged form is part A.

[0027] Figure 4 It is Figure 2 The diagram shown in section B is an enlarged view.

[0028] Figure 5 This is a schematic diagram showing the airflow guiding structure within the partition plate.

[0029] Figure 6 This is a partial sectional view of the partition.

[0030] Figure 7 This is a magnified schematic diagram showing the structure near the connecting plate.

[0031] (Symbol Explanation) 1. Damper frame; 2. Control valve; 3. Bleeding air branch; 4. Airway; 5. Air intake pipe; 6. Ventilation ducts; 7. Intake valves; 8. Intake valve actuator; 9 APUs; 10. Imports; 11. Nozzle; 12. Divider; 13. Flexible components; 14. First guide tube; 15. Second guide tube; 16a First connecting plate; 16b Second connecting plate; 17 First guide hole; 18 Second guide hole. Detailed Implementation

[0032] The following description, in conjunction with the accompanying drawings, describes one embodiment of the present invention. Furthermore, for ease of explanation, the following description will use... Figure 1 as well as Figure 2 Describe it using the top, bottom, left, and right directions on the paper.

[0033] Figure 1 The mounting structure of the APU 9, which is equipped with the auxiliary power unit air inlet of this embodiment, is shown. Figure 1 The dashed arrows in the diagram indicate the direction of airflow, and this is also true for the rest of the diagrams, so it will not be repeated below.

[0034] like Figure 1 As shown, the APU 9 is installed in the compartment at the tail of the aircraft fuselage. It includes a combustion chamber, an intake system, an exhaust system, an air compressor, a turbine, a generator, etc.

[0035] The APU 9's intake system includes an intake pipe 5, a ventilation pipe 6, and a damper frame 1 that communicates with the intake pipe 5 and the ventilation pipe 6. One end of the intake pipe 5 and the ventilation pipe 6 ( Figure 1 The upper end of the air intake duct 5 and the ventilation duct 6 are respectively connected to two openings formed on the damper frame 1, and are fixed relative to the aircraft outer skin and the circumferential firewall via the damper frame 1. Hereinafter, the portion including the upper opening of the air intake duct 5 and the ventilation duct 6 and the opening of the damper frame 1 connected to these upper openings will be collectively referred to as the air intake.

[0036] The other end of intake pipe 5 ( Figure 1 The lower end of the intake pipe 5 is connected to the air inlet of the combustion chamber of the APU 9, allowing external air to enter through the intake pipe 5 and then into the combustion chamber, where it mixes and burns with the fuel. The exhaust gas produced after combustion is discharged to the outside through the exhaust system on the right side, which includes an exhaust pipe. Furthermore, although not shown, a compressor is provided between the intake pipe 5 and the combustion chamber. This compressor compresses the air introduced through the intake pipe 5 into high-pressure compressed air and supplies it to the combustion chamber, thereby improving fuel combustion efficiency.

[0037] The opening at the other end of the ventilation duct 6 opens to the space around the combustion chamber, allowing relatively cool external air to enter through the air intake and flow to the vicinity of the combustion chamber via the ventilation duct 6. This increases airflow to dissipate heat from the APU 9, preventing it from malfunctioning due to overheating.

[0038] In addition, such as Figure 1 As shown, APU 9 is also connected to an air bleed pipe 4. Specifically, the air bleed pipe 4 is connected to the load compressor in APU 9. A portion of the air entering APU 9 from the air intake pipe 5 enters the compressor and is compressed into high-temperature and high-pressure air, which is then introduced into the cabin through the air bleed pipe 4 to regulate the temperature inside the cabin.

[0039] In addition, in this embodiment, the high-temperature and high-pressure air obtained by the compressor can be delivered to the air intake branch 3 via the air intake pipe 4 and the control valve 2. Details about the control valve 2 and the air intake branch 3 will be described later.

[0040] Figure 2 The structure of the damper frame 1 in the de-icing device of this embodiment is shown. For example... Figure 2 As shown, the damper frame 1 is formed as a square box with openings at the top and bottom, and flanges are formed at its top and bottom ends for connecting with the aircraft skin, air intake pipe 5, and ventilation pipe 6.

[0041] A partition plate 12 is formed in the center of the left and right sides of the damper frame 1. For example... Figure 2 As shown, the partition plate 12 in this embodiment is formed in a protruding shape at the center in the front-to-back direction. This partition plate 12 divides the internal space of the damper frame 1 into two parts. In this embodiment, the left part communicates with the ventilation duct 6, and the right part communicates with the air intake duct 5. In other words, the partition plate 12 divides the damper frame 1 into different flow paths for external air to flow to the air intake duct 5 and the ventilation duct 6, respectively.

[0042] Furthermore, in this embodiment, the partition plate 12 is configured to be perpendicular to the front and rear inner walls of the damper frame 1 and parallel to the left and right inner walls of the damper frame 1. However, the partition plate 12 can be configured appropriately according to the needs of the air inlet pipe 5 and the ventilation pipe 6. It can also be configured at an inclination relative to each inner wall of the damper frame 1.

[0043] Figure 5 The airflow structure within the partition plate 12 of this embodiment, not covered by the flexible member 13 described later, is shown. Figure 6 A cross-sectional view of the partition plate 12 of this embodiment is shown.

[0044] An airflow guiding structure is formed within the partition plate 12 in this embodiment. Specifically, as... Figure 5 , Figure 6 As shown, a first guide tube 14 extending in the front-to-back direction and a second guide tube 15 extending in the vertical direction are formed on the partition plate 12.

[0045] The first guide tube 14 is formed along the entire length of the partition plate 12 in the front-back direction and extends parallel to the upper edge of the partition plate 12. Furthermore, as... Figure 2 , Figure 3 , Figure 5 As shown, an inlet 10 is formed on the front wall of the damper frame 1. The inlet 10 is a through hole that penetrates the front wall of the damper frame 1 and communicates with the opening on the front side of the first guide pipe 14. Alternatively, the inlet 10 can also be formed on the rear wall of the damper frame 1 and communicate with the opening on the rear side of the first guide pipe 14.

[0046] like Figure 5 As shown, the second guide pipe 15 has multiple ( ) formed within the partition plate 12. Figure 5There are seven of them), and each of the second guide tubes 15 is arranged at equal intervals along the extension direction of the first guide tube 14, and the tube axis is arranged to be orthogonal to the tube axis of the first guide tube 14.

[0047] Each of the second guide pipes 15 has an opening at the upper edge of the partition plate 12 and a lower end connected to the first guide pipe 14. Thus, air can enter the first guide pipe 14 from the inlet 10 and flow upwards through the branching second guide pipes 15 connected to the first guide pipe 14.

[0048] In addition, the partition plate 12, which has the first guide tube 14 and the second guide tube 15, can be manufactured by molding or the like.

[0049] like Figure 2 and Figure 5 As shown, a flexible member 13 is wrapped around the upper edge of the partition plate 12. The flexible member 13 is, for example, a rubber-made film that can expand and deform under internal stress and contract and recover under no stress or insufficient stress.

[0050] like Figure 6 As shown, a first connecting plate 16a and a second connecting plate 16b are respectively provided on the left and right sides of the partition plate 12. Both connecting plates are located between the flexible member 13 and the partition plate 12. Figure 7 The structure of the second connecting plate 16b located on the right side of the partition plate 12 is shown.

[0051] like Figure 7 As shown, the second connecting plate 16b extends in the front-rear direction in a shape corresponding to the upper edge of the partition plate 12. A first guide hole 17 and a second guide hole 18 are formed on the second connecting plate 16b. The first guide hole 17 is a through hole that penetrates the second connecting plate 16b in the vertical direction, and the second guide hole 18 is a through hole that penetrates the second connecting plate 16b in the horizontal direction. The first guide hole 17 penetrates the inner peripheral surface of the second guide hole 18, thereby connecting the first guide hole 17 and the second guide hole 18.

[0052] Multiple first guide holes 17 and second guide holes 18 are formed on the second connecting plate 16b. In this embodiment, seven first guide holes 17, second guide holes 18 and second guide pipes 15 are provided correspondingly. The second guide pipes 15, first guide holes 17 and second guide holes 18 are formed at approximately the same position in the front-back direction. Preferably, the opening of the second guide pipe 15 at the upper edge of the partition plate 12 is formed at the same position as the first guide hole 17 in the front-back direction.

[0053] In addition, except that the first guide hole 17 and the second guide hole 18 are not formed, the structure of the first connecting plate 16a and the second connecting plate 16b is the same, and repeated descriptions are omitted here.

[0054] The flexible member 13 covers the upper edge of the partition plate 12 from above and covers the two connecting plates from the left and right sides respectively. Then, the flexible member 13 is fixedly connected to the two connecting plates by connectors (not shown). In this case, it is preferable that the part of the flexible member 13 in contact with each connecting plate is airtight, so that when air flows into the gap between the partition plate 12 and the flexible member 13 from the second guide pipe 15, air will not leak from the flexible member 13 to each connecting plate.

[0055] In this embodiment, a plurality of nozzles 11 are provided on one side (right side) of the partition plate 12. The nozzles 11 can be common nozzles on the market or nozzles designed according to actual de-icing needs.

[0056] like Figure 6 As shown, the interior of the nozzle 11 can communicate with the second guide hole 18, and multiple (six in this case) jet nozzles are formed on the nozzle 11 facing different directions. Thus, air can be discharged from the multiple jet nozzles of the nozzle 11 in six directions via the first guide hole 17 and the second guide hole 18 (see reference). Figure 4 ).

[0057] In addition, in this embodiment, there are three nozzles 11, one of which is located at the center in the front-to-back direction, and the other two nozzles 11 are arranged symmetrically with respect to the nozzle 11 located at the center in the front-to-back direction.

[0058] The operation of the de-icing device in this embodiment will be described below.

[0059] The de-icing device of this embodiment mainly includes: a damper frame 1 with an inlet 10; a partition plate 12 with a first guide pipe 14 and a second guide pipe 15 inside; a flexible member 13 covering the upper edge of the partition plate 12; a second connecting plate 16b located between the flexible member 13 and the partition plate 12 and having a first guide hole 17 and a second guide hole 18; a nozzle 11 communicating with the first guide hole 17 and the second guide hole 18; and an air duct 3 connected to the air duct 4 via a control valve 2.

[0060] Control valve 2 is, for example, an electric valve with adjustable flow rate, whose opening and closing status can be controlled by the aircraft's control system.

[0061] When the aircraft is in icy or snowy weather and the APU 9 is operating, the pilot or other personnel can open control valve 2. At this time, the high-pressure, high-temperature air in the bleed air pipe 4 can flow into the bleed air branch 3 through the control valve 2.

[0062] One end of the bleed air branch 3 is connected to the control valve 2, and the other end is connected to the inlet 10. Thus, air flowing through the bleed air branch 3 flows into the inlet 10. The air flowing into the inlet 10 further flows into the first guide pipe 14 in the partition plate 12, and then branches into the various second guide pipes 15.

[0063] Next, as Figure 6 As shown, when high-temperature and high-pressure air flows into the space between the flexible member 13 and the partition plate 12 through the opening at the upper edge of the second guide pipe 15, the portion of the flexible member 13 located between the parts connected to the two connecting plates (hereinafter sometimes referred to as the flexible deformation portion) will expand and deform away from the partition plate 12 under the action of the high-pressure air, and then contract as the air between the flexible member 13 and the partition plate 12 is discharged through the guide hole on the second connecting plate 16b and the nozzle 11.

[0064] When the APU is activated, the intake valve 7 is lifted upward by the intake valve actuator 8, exposing the vent frame 1 to the environment outside the fuselage. In this situation, when the aircraft is in icy or snowy weather, ice and snow will fall on the upper edge of the partition 12 and condense. The falling ice and snow will gradually accumulate with the ice and snow that have previously condensed on the partition 12 and expand towards the openings on both sides connected to the intake pipe 5 and the ventilation pipe 6, causing the air intake path of the intake pipe 5 and the ventilation pipe 6 to be blocked. This reduces the amount of air introduced from the intake of the APU 9, which may affect the normal operation of the APU 9.

[0065] In response, according to the de-icing device of this embodiment, the ice and snow that originally accumulated on the partition plate 12 (specifically on the flexible member 13 covering the upper edge of the partition plate 12) will be bounced off the flexible member 13 due to the expansion of the flexible member 13, and thus fall off the flexible member 13.

[0066] Furthermore, even if a relatively solid layer of ice condenses on the flexible member 13 due to low temperature, the ice layer can be broken by the expansion and contraction deformation of the flexible member 13, and the ice layer will no longer be firmly attached to the surface of the flexible member 13.

[0067] In addition, in the de-icing device of this embodiment, the air flowing into the second guide pipe 15 flows from the opening located at the upper edge of the partition plate 12 to the space between the flexible member 13 and the partition plate 12. Then the air flows into the interior of the nozzle 11 through the first guide hole 17 and the second guide hole 18 on the second connecting plate 16b, and is then sprayed out in six directions from the jet nozzles of different orientations.

[0068] According to the de-icing device of this embodiment, the high-temperature and high-pressure air supplied to the cabin is branched from the air intake pipe 4 into the air intake branch 3, and the high-temperature and high-pressure air is ejected from a plurality of nozzles 11 provided on the partition plate 12 in six different directions through the inlet 10, the first guide pipe 14, the second guide pipe 15, the first guide hole 17, and the second guide hole 18.

[0069] Therefore, the high-temperature, high-pressure air ejected from the nozzle 11 can blow away the ice and snow accumulated on the flexible member 13, and can also blow away ice layers that have been loosened by the deformation of the flexible member 13, making it easier to remove thicker ice layers. In addition, the nozzle 11 can also blow away falling ice and snow to prevent ice and snow from continuously falling on the flexible member 13.

[0070] (Main effects of this implementation method)

[0071] According to the de-icing device for the auxiliary power unit air inlet of this embodiment, by covering the vicinity of the upper edge of the partition plate 12 in the auxiliary power unit air inlet with a flexible member 13, and by introducing air through the first guide pipe 14 and the second guide pipe 15 formed in the partition plate 12 from the opening at the upper edge into the space between the flexible member 13 and the partition plate 12, the flexible member 13 expands and deforms, thereby shaking off the ice and snow attached to and accumulated near the upper edge of the partition plate 12, achieving a de-icing effect. Furthermore, the ice layer condensed near the upper edge of the partition plate 12 can be broken off along with the expansion and deformation of the flexible member 13, and shaken off as it expands and deforms, improving the de-icing effect.

[0072] Furthermore, the air entering between the flexible member 13 and the partition plate 12 can be ejected from the nozzle 11 through the first guide hole 17 and the second guide hole 18 formed in the second connecting plate 16b, thereby enabling the ejected air to blow away the attached ice and snow while the flexible member 13 repeatedly expands and contracts, further improving the de-icing effect.

[0073] In addition, the air entering and exiting between the flexible component 13 and the partition plate 12 is high-temperature and high-pressure air introduced from the air intake pipe 4 of the APU 9 via the control valve 2 and the air intake branch 3. This allows the high-temperature and high-pressure air to be used to further improve the de-icing effect without the need for additional air supply equipment, thus reducing the cost of the device.

[0074] (Variation example)

[0075] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above embodiments.

[0076] For example, in the above embodiment, the flexible member 13 is made of rubber, but it is not limited to this. For example, the flexible member 13 may also be made of polymers such as polyethylene and polyvinyl chloride, or other materials that can be flexibly deformed. In addition, the material constituting the flexible member 13 is preferably waterproof and airtight.

[0077] Furthermore, in the above embodiment, air is discharged through a guide hole and a nozzle 11 formed on the second connecting plate 16b connecting the flexible member 13 and the partition plate 12, but this is not a limitation. For example, the second connecting plate 16b may not have a guide hole and the partition plate 12 may not have a nozzle 11. In this case, a valve may be provided at the port of the first guide pipe 14 on the side opposite to the inlet 10. When de-icing is desired, the valve is closed to allow the flexible member 13 to expand, and after the flexible member 13 has expanded and deformed, the valve is opened to discharge air and allow the flexible member 13 to contract. In this case, the flexible member 13 may be directly connected to the partition plate 12.

[0078] Furthermore, in the above embodiment, the second guide pipe 15 opens at the upper edge (upper end face) of the partition plate 12, but is not limited to this. The opening position of the second guide pipe 15 on the partition plate 12 can be appropriately set according to the desired expansion direction of the flexible member 13. For example, when the flexible member 13 needs to expand obliquely upward, the second guide pipe 15 can open at the boundary between the upper end face and the left and right sides of the partition plate 12.

[0079] Furthermore, in the above embodiment, only the second connecting plate 16b has a guide hole, and only the nozzle 11 is provided on the side where the second connecting plate 16b is located, but this is not a limitation. For example, the first connecting plate 16a can be configured as a connecting plate with a guide hole, the same as the second connecting plate 16b, and the nozzle 11 can also be provided on the side of the first connecting plate 16a, thereby further preventing the ventilation pipe from being blocked.

[0080] Furthermore, in the above embodiment, the air used to deform the flexible member 13 is introduced from the load compressor in the APU 9 via the bleed pipe 4, control valve 2, and bleed branch 3, but is not limited to this. For example, it may be introduced from other air compressors such as the compressor near the intake pipe 5 in the APU 9, or it may be introduced from an air supply device other than the APU 9.

[0081] It should be understood that within the scope of this utility model, the various parts in the embodiments can be freely combined, or the various parts in the embodiments can be appropriately modified or omitted.

Claims

1. An ice-removal device for the air intake of an auxiliary power unit, characterized in that include: A partition plate that divides the air inlet of the auxiliary power unit, an air supply passage is formed inside the partition plate, and the air supply passage opens near the upper edge of the partition plate; as well as A flexible component capable of flexible deformation, the flexible component covering the upper edge of the partition plate. The flexible component expands and deforms as air flows between the partition plate and the flexible component through the air supply path.

2. The de-icing device for the air inlet of the auxiliary power unit as described in claim 1, characterized in that, Air entering between the partition plate and the flexible member can be expelled, allowing the flexible member to contract and deform.

3. The de-icing device for the air inlet of the auxiliary power unit as described in claim 2, characterized in that, It also includes a connector, through which the flexible member is connected to the partition plate, and an exhaust flow path is formed within the connector. Air between the partition plate and the flexible component can be discharged through the exhaust path.

4. The de-icing device for the air inlet of the auxiliary power unit as described in claim 3, characterized in that, It also includes a nozzle disposed near the upper edge of the partition plate. Air discharged from the exhaust path can be ejected from the nozzle.

5. The de-icing device for the air inlet of the auxiliary power unit as described in claim 4, characterized in that, The nozzle has multiple different ejection directions.

6. The de-icing device for the air inlet of the auxiliary power unit as described in claim 5, characterized in that, The nozzles are arranged in a plurality of manner extending from the upper edge of the partition plate.

7. The de-icing device for the air inlet of the auxiliary power unit as described in any one of claims 1 to 6, characterized in that, The air entering between the partition plate and the flexible component is high-temperature and high-pressure air.

8. The de-icing device for the air inlet of the auxiliary power unit as described in claim 7, characterized in that, The auxiliary power unit includes an airflow path for supplying the high-temperature, high-pressure airflow. The de-icing device at the air inlet of the auxiliary power unit includes an air intake branch, which connects the air intake path and the air supply path.

9. The de-icing device for the air inlet of the auxiliary power unit as described in claim 8, characterized in that, The induced air branch and the induced air flow path are connected via a valve.

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