An air distribution device with passive recirculation function

Abstract

The present invention relates to an air distribution device with a passive recirculation function, belonging to the technical field of aircraft environmental control air supply distribution devices. The air distribution device comprises a venturi, an inner cover shell and an outer cover shell arranged outside the inner cover shell, a return air passage is arranged between the outer cover shell and the inner cover shell, two ends of the venturi are respectively connected to and penetrate the cover bottom ends of the outer cover shell and the inner cover shell, and a side wall of the venturi is provided with a plurality of recirculation air suction holes connected with the return air passage. With this structure, the outer cover shell and the inner cover shell are connected by arranging the venturi, and the return air passage is arranged between the outer cover shell and the inner cover shell. When the aircraft environmental control air supply passes through the venturi, a local negative pressure can be formed, thereby sucking the cabin air into the venturi through the return air passage to mix with the environmental control air supply and re-participate in the distribution, so as to achieve the purpose of non-power source recirculation, increase the flow rate of the air supply into the cabin, improve the flow field in the cabin, reduce the temperature difference between the supply air temperature and the cabin temperature, and improve the temperature field of the air in the cabin.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft environmental control air supply distribution devices, and in particular relates to an air distribution device with a passive recirculation function. Background Art

[0002] At present, conventional air distribution outlets of aircraft in the domestic aviation field adopt direct air supply. When in the cooling state, the cabin temperature is high, and the air flow temperature at the air distribution outlet is low. Condensation is easily formed when encountering hot air in the cabin, causing water spraying and other adverse consequences such as water accumulation.

[0003] Therefore, an air distribution device with passive recirculation function that can increase air flow velocity, reduce the temperature difference between inside and outside, and improve the temperature field in the cabin is urgently needed. Summary of the invention

[0004] The invention provides an air distribution device with a passive recirculation function, which is used to solve the technical problem in the prior art that direct air supply from a conventional air distribution port of an aircraft is prone to condensation and water accumulation.

[0005] The present invention is achieved through the following technical scheme: an air distribution device with passive recirculation function, including a venturi, an inner cover shell and an outer cover shell arranged outside the inner cover shell, the inner cover shell and the outer cover shell are both U-shaped covers and the cover mouth ends are in the same direction, a return air channel is arranged between the outer cover shell and the inner cover shell, the two ends of the venturi are respectively connected to and penetrate the cover bottom ends of the outer cover shell and the inner cover shell, the side wall of the venturi is provided with a plurality of recirculation air intake holes, and the recirculation air intake holes are connected to the return air channel.

[0006] In order to better realize the present invention, further optimization is made in the above structure, which also includes an end cover, wherein the end cover is a U-shaped cover, the cover mouth end of the end cover is connected to the cover bottom end of the outer cover shell and connected to the Venturi tube, the cover bottom end of the end cover is provided with an air inlet, and the end cover and the cover bottom end of the outer cover shell are surrounded to form an air gathering chamber.

[0007] In order to better implement the present invention, the above structure is further optimized to further include an air inlet pipe, one end of which is connected to the air inlet and the other end of which is connected to the aircraft environmental control air supply system.

[0008] In order to better realize the present invention, the above structure is further optimized to further include an air outlet grille, which is arranged at the cover opening end of the inner cover shell, and the air outlet grille and the inner cover shell are surrounded to form a pressure stabilizing chamber.

[0009] In order to better realize the present invention, further optimization is made in the above structure, which also includes a diffuser grid, which is arranged in the inner cover shell, the diffuser grid is arranged parallel to the air outlet grid in the vertical direction, and the diffuser grid is arranged crosswise with the air outlet grid in the horizontal direction.

[0010] In order to better implement the present invention, further optimization is made in the above structure, and the number of the diffuser grids is one or more layers.

[0011] In order to better implement the present invention, further optimization is made in the above structure, the number of the Venturi tubes is multiple, and the multiple Venturi tubes are distributed in a rectangular array.

[0012] In order to better realize the present invention, further optimization is made in the above structure. The cross-sectional shape of the Venturi tube is rectangular, and the bottom ends of the inner cover shell and the outer cover shell are provided with rectangular holes. The two ends of the Venturi tube pass through the bottom ends of the inner cover shell and the outer cover shell through the rectangular holes.

[0013] In order to better implement the present invention, further optimization is made in the above structure, and the cover mouth ends of the inner cover shell and the outer cover shell expand outwards into a trumpet shape.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The air distribution device with passive recirculation function provided by the present invention comprises a venturi, an inner cover shell and an outer cover shell arranged outside the inner cover shell, the inner cover shell and the outer cover shell are both U-shaped covers and the cover mouth ends are in the same direction, a return air channel is arranged between the outer cover shell and the inner cover shell, two ends of the venturi are respectively connected and penetrate the cover bottom ends of the outer cover shell and the inner cover shell, a side wall of the venturi is provided with a plurality of recirculation air intake holes, and the recirculation air intake holes are connected with the return air channel. With this structure, the outer cover shell and the inner cover shell are connected by arranging the venturi, and the return air channel is arranged between the outer cover shell and the inner cover shell. When the environmental control air supply of the aircraft passes through the venturi, a local negative pressure can be formed, thereby sucking the cabin air into the venturi through the return air channel to mix with the environmental control air supply and re-participate in the distribution, so as to achieve the purpose of power-free recirculation, increase the flow rate of the air supply into the cabin, improve the flow field in the cabin, reduce the temperature difference between the supply air temperature and the cabin temperature, improve the temperature field of the air in the cabin, and avoid condensation at the air outlet to form water accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a longitudinal sectional view of an air distribution device with a passive recirculation function in the present invention;

[0018] Figure 2 is a perspective view of an air distribution device with a passive recirculation function in the present invention;

[0019] Figure 3 It is a cross-sectional view of the air distribution device with passive recirculation function in the present invention.

[0020] In the figure:

[0021] 1-Venturi tube; 11-recirculation air intake hole; 2-inner cover shell; 21-pressure stabilizing chamber; 3-outer cover shell; 4-return air channel; 5-end cover; 51-air inlet; 52-air gathering chamber; 6-air inlet pipe; 7-air outlet grid; 8-dispersion grid. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] In this embodiment, an air distribution device with passive recirculation function, such as Figures 1 to 3 As shown, it includes a venturi tube 1, an inner cover shell 2 and an outer cover shell 3 arranged outside the inner cover shell 2. Specifically, the inner cover shell 2 and the outer cover shell 3 are both U-shaped covers with the cover mouth ends in the same direction. A return air channel 4 is arranged between the outer cover shell 3 and the inner cover shell 2. The two ends of the venturi tube 1 are respectively connected to and penetrate the cover bottom ends of the outer cover shell 3 and the inner cover shell 2. The aircraft environmental control air supply can enter from the cover bottom end of the outer cover shell 3 and enter into the inner cover shell 2 through the venturi tube 1, and A local negative pressure is formed at the throat of the venturi 1. A plurality of recirculation air intake holes 11 are provided on the side wall of the venturi 1. The recirculation air intake holes 11 are connected to the return air duct 4. The local negative pressure formed at the throat of the venturi 1 serves as a power source to form a circulation effect, which can absorb the air in the cabin through the return air duct 4 and the recirculation air intake holes 11 to compensate into the venturi 1, and then mix it with the aircraft environmental control air supply and enter the inner cover shell 2, and be discharged from the cover mouth end of the inner cover shell 2.

[0027] With this structure, the venturi 1 is arranged to connect the outer cover shell 3 and the inner cover shell 2, and the return air duct 4 is arranged between the outer cover shell 3 and the inner cover shell 2. When the aircraft environmental control air supply passes through the venturi 1, a local negative pressure can be formed, thereby sucking the cabin air into the venturi 1 through the return air duct 4 to mix with the environmental control air supply and redistribute it, so as to achieve the purpose of power-free recirculation, avoid the use of conventional recirculation fans, increase the flow rate of the air supply into the cabin, improve the flow field in the cabin, reduce the temperature difference between the air supply temperature and the cabin temperature, improve the temperature field of the air in the cabin, and avoid condensation at the air outlet to form water accumulation.

[0028] In this embodiment, Figure 1 and Figure 2 As shown, it also includes an end cover 5, which is a U-shaped cover. The end cover 5 and the outer cover shell 3 are an integrated structure. The cover mouth end of the end cover 5 is connected to the cover bottom end of the outer cover shell 3 and connected to the venturi 1. The inner cover shell 2 and the end cover 5 are connected through the two ends of the venturi 1. The cover bottom end of the end cover 5 is provided with an air inlet 51. The end cover 5 and the cover bottom end of the outer cover shell 3 are surrounded to form an air gathering cavity 52. ​​The air inlet 51 is used to be connected with the air outlet end of the aircraft environmental control air supply system. The environmental control air supply is gathered into the air gathering cavity 52 through the air inlet 51, so that the environmental control air supply passes through the venturi 1 after being stabilized, thereby improving the flow field inside the shell.

[0029] As an optimization, an air inlet pipe 6 is also included, one end of which is connected to the air inlet 51 and the other end is connected to the aircraft environmental control air supply system. The position where the air inlet pipe 6 is connected to the outer cover shell 3 needs to be sealed.

[0030] Embodiment 2:

[0031] In this embodiment, an air distribution device with passive recirculation function, such as Figures 1 to 3 As shown, it includes a venturi tube 1, an inner cover shell 2 and an outer cover shell 3 arranged outside the inner cover shell 2. Specifically, the inner cover shell 2 and the outer cover shell 3 are both U-shaped covers with the cover mouth ends in the same direction. A return air channel 4 is arranged between the outer cover shell 3 and the inner cover shell 2. The two ends of the venturi tube 1 are respectively connected to and penetrate the cover bottom ends of the outer cover shell 3 and the inner cover shell 2. The aircraft environmental control air supply can enter from the cover bottom end of the outer cover shell 3 and enter into the inner cover shell 2 through the venturi tube 1, and A local negative pressure is formed at the throat of the venturi 1. A plurality of recirculation air intake holes 11 are provided on the side wall of the venturi 1. The recirculation air intake holes 11 are connected to the return air duct 4. The local negative pressure formed at the throat of the venturi 1 serves as a power source to form a circulation effect, which can absorb the air in the cabin through the return air duct 4 and the recirculation air intake holes 11 to compensate into the venturi 1, and then mix it with the aircraft environmental control air supply and enter the inner cover shell 2, and be discharged from the cover mouth end of the inner cover shell 2.

[0032] In this embodiment, Figure 1 and Figure 2 As shown, it also includes an end cover 5, which is a U-shaped cover. The end cover 5 and the outer cover shell 3 are an integrated structure. The cover mouth end of the end cover 5 is connected to the cover bottom end of the outer cover shell 3 and connected to the venturi 1. The inner cover shell 2 and the end cover 5 are connected through the two ends of the venturi 1. The cover bottom end of the end cover 5 is provided with an air inlet 51. The end cover 5 and the cover bottom end of the outer cover shell 3 are surrounded to form an air gathering cavity 52. ​​The air inlet 51 is used to be connected with the air outlet end of the aircraft environmental control air supply system. The environmental control air supply is gathered into the air gathering cavity 52 through the air inlet 51, so that the environmental control air supply passes through the venturi 1 after being stabilized, thereby improving the flow field inside the shell.

[0033] As an optimization, Figure 1 As shown, it also includes an air inlet pipe 6, one end of which is connected to the air inlet 51 and the other end is connected to the aircraft environmental control air supply system. The position where the air inlet pipe 6 is connected to the outer cover shell 3 needs to be sealed.

[0034] In the present embodiment, an air outlet grille 7 is further included. The air outlet grille 7 is arranged at the cover mouth end of the inner cover shell 2. The air outlet grille 7 and the inner cover shell 2 are arranged to form a pressure stabilizing chamber 21. The pressure stabilizing chamber 21 makes the environmentally controlled air supply through the venturi tube 1 more stable, reduces noise, and makes the environmentally controlled air supply pass through the air outlet grille 7 evenly, so that the air outlet speed is uniform and stable.

[0035] Further, such as Figure 1As shown, it also includes a diffuser grid 8, which is arranged parallel to the air outlet grid 7 in the vertical direction, and cross-arranged with the air outlet grid 7 in the horizontal direction. The diffuser grid 8 plays a diffuser role, so that the environmentally controlled air supply entering the pressure stabilizing chamber 21 is evenly dispersed, avoiding the occurrence of turbulent flow fields and stabilizing the air supply transportation.

[0036] In this embodiment, the air outlet grid 7 and the diffuser grid 8 are both composed of a plurality of parallel and spaced bars.

[0037] As an optimization, the number of the above-mentioned diffuser grids 8 is one layer or multiple layers. The diffuser grids 8 having multiple layers can provide stronger diffuser and voltage stabilizing effects.

[0038] As a better implementation of this embodiment, Figure 3 As shown, there are multiple venturi tubes 1, which are distributed in a rectangular array. The recirculation air intake holes 11 on each of the venturi tubes 1 are connected to the return air duct 4. Each of the venturi tubes 1 can form an independent local negative pressure, which enhances the source power of recirculation, so that more cabin air can circulate into the return air duct 4, further increasing the flow rate of the airflow supplied to the cabin, improving the flow field in the cabin, reducing the temperature difference between the supply air temperature and the cabin temperature, and improving the temperature field of the air in the cabin.

[0039] In this embodiment, Figure 3 As shown, the cross-sectional shape of the Venturi tube 1 is rectangular, and the bottom ends of the inner cover shell 2 and the outer cover shell 3 are provided with rectangular holes, and the two ends of the Venturi tube 1 pass through the bottom ends of the inner cover shell 2 and the outer cover shell 3 through the rectangular holes, wherein the four side walls of the Venturi tube 1 are provided with the recirculation air intake holes 11, wherein five recirculation air intake holes 11 are respectively provided on the wider opposite side walls, and one recirculation air intake hole 11 is respectively provided on the narrower opposite side walls, thereby ensuring smooth airflow circulation.

[0040] In this embodiment, Figure 1 As shown, the cover mouth ends of the inner cover shell 2 and the outer cover shell 3 expand outwards in a trumpet shape, thereby increasing the air outlet area and making the air outlet more uniform and smooth.

[0041] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air distribution device with passive recirculation function, characterized in that: It comprises a venturi tube, an inner cover shell and an outer cover shell arranged outside the inner cover shell, the inner cover shell and the outer cover shell are both U-shaped covers with the cover mouth ends in the same direction, a return air channel is arranged between the outer cover shell and the inner cover shell, the two ends of the venturi tube are respectively connected to and penetrate the cover bottom ends of the outer cover shell and the inner cover shell, the side wall of the venturi tube is provided with a plurality of recirculation air intake holes, and the recirculation air intake holes are connected with the return air channel; It also includes an end cover, the end cover is a U-shaped cover, the cover mouth end of the end cover is connected to the cover bottom end of the outer cover shell and communicates with the venturi tube, the cover bottom end of the end cover is provided with an air inlet, and the end cover and the cover bottom end of the outer cover shell are surrounded to form an air collection cavity; It also includes an air inlet pipe, one end of which is connected to the air inlet and the other end of which is connected to the aircraft environmental control air supply system; It also includes an air outlet grille, which is arranged at the cover opening end of the inner cover shell, and the air outlet grille and the inner cover shell are surrounded to form a pressure stabilizing chamber.

2. An air distribution device with passive recirculation function according to claim 1, characterized in that: It also includes a diffuser grid, which is arranged parallel to the air outlet grid in the vertical direction and cross-arranged with the air outlet grid in the horizontal direction.

3. An air distribution device with passive recirculation function according to claim 2, characterized in that: The number of the diffuser grids is one or more layers.

4. An air distribution device with passive recirculation function according to any one of claims 1 to 3, characterized in that: There are multiple Venturi tubes, and the multiple Venturi tubes are distributed in a rectangular array.

5. An air distribution device with passive recirculation function according to claim 4, characterized in that: The cross-sectional shape of the venturi tube is rectangular, the bottom ends of the inner and outer shells are both provided with rectangular holes, and the two ends of the venturi tube penetrate the bottom ends of the inner and outer shells through the rectangular holes.

6. An air distribution device with passive recirculation function according to claim 5, characterized in that: The cover mouth ends of the inner cover shell and the outer cover shell expand outwards to be in a trumpet shape.

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