Airflow organization system for passenger aircraft with in-cabin humidification and cabin wall moisture protection

Abstract

The application provides a passenger aircraft air flow organization system with cabin humidification and cabin wall moisture-proof functions, which is improved on the basis of the existing double-layer mixed ventilation system, increases humidification mechanism and moisture-proof air supply mechanism, and the new mechanism is different in narrow-body passenger aircraft and wide-body passenger aircraft. For the narrow-body passenger aircraft, the luggage rack humidification air supply is inclined to send humidified air to the passenger area, and the lower part of the side cabin wall air supply is used to send dry fresh air to flush the cabin wall for cabin wall moisture-proof. For the wide-body passenger aircraft, the dry pipe humidification device is added in the seat cabin dry pipe to centrally humidify the seat cabin air supply; the lower part of the side cabin wall air supply and the seat cabin upper space moisture-proof air supply are used to send dry fresh air to flush the side cabin wall, the seat cabin luggage rack and the seat cabin ceiling for cabin wall moisture-proof. The application can create a relatively low humidity air curtain area near the cabin wall while humidifying the passenger area, reduce the low humidity discomfort caused by the existing mixed ventilation design, and effectively reduce the water content in the air leakage at the cabin wall in the seat cabin.

Description

Technical Field

[0001] This invention belongs to the field of passenger aircraft ventilation technology, and relates to a passenger aircraft airflow organization system with cabin humidification and cabin wall moisture protection functions. Background Technology

[0002] With the development of technology and globalization, airplanes are gradually becoming the mainstream mode of transportation for people. Modern commercial aircraft typically cruise at altitudes of 8,000 to 12,000 meters, where the high-altitude environment is extremely complex, characterized by low temperatures and low pressure. Due to the special nature of the flight environment, aircraft rely on a unique cabin environmental control system (ECS) to create a healthy, comfortable, and safe enclosed environment in the cabin. The ECS has strict control over the humidity of the cabin environment. If the humidity is too high, because there are many hygroscopic materials on the aircraft, it will absorb a considerable amount of moisture during operation. The presence of moisture can corrode aircraft structural components and electrical wiring, and it can also increase the weight of the aircraft, thus increasing flight costs. If the humidity is too low, long-haul passengers often experience fatigue, eye irritation, nasal dryness, and other discomfort due to prolonged exposure to low humidity. Current designs generally control the relative humidity of the cabin to around 10-20%. While a low humidity environment can reduce the amount of moisture absorbed by the aircraft during operation, it can also reduce passenger comfort to some extent. Some scholars have suggested that the cabin environment could be appropriately humidified.

[0003] Currently, humidification solutions designed for aircraft cabins mainly fall into three categories: first, designing new environmental control systems or using centralized humidification devices to humidify the cabin environment as a whole; second, adding personalized humidification devices around passengers inside the cabin to humidify the cabin environment locally; and third, increasing the humidity of the cabin environment by changing the airflow organization. The first two solutions, while humidifying the cabin, also exacerbate the accumulation of moisture in the aircraft's insulation layer. For the third solution, a new displacement ventilation system was proposed in the literature (Zhang, et al. 2010. Building and Environment, 45(4):907-915.), in which the interlayer channel along the side bulkhead provides regulated fresh and dry air, and the air outlet under the floor provides humidified mixed air. Although this ventilation system effectively reduces the absorption of moisture from the cabin environment by the aircraft while humidifying it, the mainstream ventilation system used on commercial aircraft is still the mixed ventilation system, and the application of displacement ventilation on aircraft has not yet become widespread.

[0004] This invention aims to improve upon the above shortcomings by developing an airflow organization system for passenger aircraft that combines cabin humidification and bulkhead moisture protection based on mixed ventilation. Summary of the Invention

[0005] This invention provides an airflow organization system for passenger aircraft with cabin humidification and bulkhead moisture protection functions. This ventilation system humidifies the passenger area while simultaneously creating a relatively low-humidity air curtain zone near the cabin side bulkheads. This provides passengers with a comfortable thermal and humid environment, reduces the discomfort caused by low humidity in existing mixed ventilation designs, and effectively reduces the moisture content in the air seepage from the cabin bulkheads.

[0006] The technical solution of this invention is as follows:

[0007] An improved airflow organization system for passenger aircraft, featuring cabin humidification and bulkhead moisture protection, is proposed based on an existing dual-layer hybrid ventilation system. The existing dual-layer hybrid ventilation system includes a cabin ceiling air supply 1, a side bulkhead upper air supply 2, and an exhaust 5. The cabin ceiling air supply 1 includes a first cabin floor air supply main duct 1-1, a first air supply riser duct 1-2, and a cabin ceiling air outlet 1-3. The side bulkhead upper air supply 2 includes a side bulkhead upper air outlet 2-1 and a second air supply riser duct 2-2. The lower ends of both the first air supply riser duct 1-2 and the second air supply riser duct 2-2 are connected to the first cabin floor air supply main duct 1-1, and their upper ends are connected to the cabin ceiling air outlet 1-3 and the side bulkhead upper air outlet 2-1, respectively. The first cabin floor air supply main duct 1-1 receives mixed air from the aircraft's mixing manifold through the first air supply riser duct 1-2. The second air supply riser 2-2 delivers air to the cabin ceiling air outlet 1-3 and the upper side bulkhead air outlet 2-1, respectively. The cabin ceiling air outlet 1-3 and the upper side bulkhead air outlet 2-1 horizontally deliver mixed air into the cabin for thorough mixing with the cabin air. The cabin air is then exhausted through the exhaust vent 5 located at the lower part of the side bulkhead. The aircraft airflow organization system also includes a humidification mechanism and a moisture-proof air supply mechanism, used to deliver humidified air to humidify the cabin environment and to deliver dry fresh air to prevent moisture buildup in the bulkhead, respectively. The humidification mechanism and the moisture-proof air supply mechanism differ for narrow-body and wide-body aircraft. Specifically:

[0008] For narrow-body passenger aircraft, the humidification mechanism is the overhead luggage rack humidification and air supply 4, and the moisture-proof air supply mechanism is the air supply 3 at the bottom of the side bulkhead.

[0009] The luggage rack humidification and air supply 4 includes a humidification and air supply branch pipe 4-1, a humidification device 4-2, and luggage rack humidification vents 4-3. The humidification device 4-2 is connected to the first air supply riser pipe 1-2 through the humidification and air supply branch pipe 4-1. The luggage rack humidification vents 4-3 are symmetrically arranged along the cabin aisle on the luggage racks diagonally above the two passengers not near the window, with two on each side of each row. The two luggage rack humidification vents 4-3 on the same side of each row are connected to the same humidification device 4-2. The humidification device 4-2 humidifies the mixed air diverted from the first air supply riser pipe 1-2. The humidified air is then directed diagonally downwards from the luggage rack humidification vents 4-3 to the passenger area, creating a relatively comfortable humidity environment for the passengers.

[0010] The lower side bulkhead air supply 3 includes a second cabin bottom air supply main duct 3-1, a third air supply riser duct 3-2, and a lower side bulkhead air supply outlet 3-3. The second cabin floor air supply duct 3-1 is located adjacent to both side bulkheads and arranged under the cabin floor along the fuselage direction. The lower end of the third air supply riser duct 3-2 is connected to the second cabin floor air supply duct 3-1, and the upper end is connected to the lower side bulkhead air supply outlet 3-3. The lower side bulkhead air supply outlet 3-3 is elongated and embedded in the bulkhead adjacent to the seat area along the fuselage direction. It has embedded louvers and can adjust the airflow direction. The second cabin floor air supply duct 3-1 delivers dry fresh air, which is slightly warmer than the cabin temperature, to the lower side bulkhead air supply outlet 3-3 through the third air supply riser duct 3-2. The lower side bulkhead air supply outlet 3-3 sends dry fresh air upward along the bulkhead to wash over the cabin bulkhead, creating a relatively low humidity air curtain area near the bulkhead. This slows down the penetration of humid air in the cabin environment into the aircraft insulation layer through the gaps in the bulkhead after humidification.

[0011] For wide-body passenger aircraft, the humidification mechanism is a dry pipe humidification device, and the moisture-proof air supply mechanism includes air supply 3 in the lower part of the side bulkhead and moisture-proof air supply 6 in the upper space of the cabin.

[0012] The aforementioned dry duct humidification device is arranged inside the first cabin bottom air supply duct 1-1, and is used to humidify the mixed air transported in the entire first cabin bottom air supply duct 1-1. The humidified mixed air is transported to the cabin top air supply port 1-3 and the upper side air supply port 2-1 through the first air supply riser duct 1-2 and the second air supply riser duct 2-2, respectively. The cabin top air supply port 1-3 and the upper side air supply port 2-1 horizontally deliver the humidified mixed air into the cabin, fully mixing the airflow in the cabin and humidifying the cabin environment.

[0013] The structure, arrangement, and air supply method of the lower side bulkhead air supply 3 are the same as those of the lower side bulkhead air supply 3 in narrow-body passenger aircraft.

[0014] The aforementioned upper cabin space moisture-proof air supply 6 includes a third cabin floor air supply main duct 6-1, a fourth air supply riser duct 6-2, a cabin top plate moisture-proof air supply outlet 6-3, and a side bulkhead upper moisture-proof air supply outlet 6-4. The third cabin floor air supply main duct 6-1 is located adjacent to the two side bulkheads and arranged along the fuselage direction under the cabin floor. The lower end of the fourth air supply riser duct 6-2 is connected to the third cabin floor air supply main duct 6-1, and the upper end is connected to the cabin top plate moisture-proof air supply outlet 6-3 and the side bulkhead upper moisture-proof air supply outlet 6-4, respectively. The cabin top plate moisture-proof air supply outlet 6-3 and the side bulkhead upper moisture-proof air supply outlet 6-4 are respectively arranged close to the upper part of the cabin top plate air supply outlet 1-3 and the upper part of the side bulkhead upper air supply outlet 2-1. The third cabin floor air supply duct 6-1 delivers regulated dry fresh air through the fourth air supply riser duct 6-2 to the cabin ceiling moisture-proof air supply vent 6-3 and the upper side bulkhead moisture-proof air supply vent 6-4 respectively. The cabin ceiling moisture-proof air supply vent 6-3 and the upper side bulkhead moisture-proof air supply vent 6-4 tilt upwards to deliver dry fresh air to wash over the cabin ceiling and overhead luggage racks respectively, creating a low-humidity air curtain zone in the upper cabin space, reducing the penetration of humid air in the cabin environment after humidification into the aircraft insulation layer through the gaps in the cabin ceiling and overhead luggage racks.

[0015] The aforementioned passenger aircraft airflow organization system adopts a total air volume supply form of 50% fresh air + 50% return air. For narrow-body passenger aircraft, the air supplied by the overhead air supply 1, the upper side bulkhead air supply 2, and the overhead luggage rack humidification air supply 4 all come from the first cabin bottom air supply duct 1-1. The first cabin bottom air supply duct 1-1 supplies mixed air from the aircraft mixing manifold, including half of the fresh air volume and all of the return air. The air supplied by the lower side bulkhead air supply 3 comes from the second cabin bottom air supply duct 3-1. The second cabin bottom air supply duct 3-1 supplies dry fresh air, which accounts for half of the total fresh air volume. For wide-body passenger aircraft, the air supplied by the overhead air supply 1 and the upper side bulkhead air supply 2 both originate from the first under-cabin air supply duct 1-1. The first under-cabin air supply duct 1-1 supplies mixed air from the aircraft's mixing manifold after humidification by the duct humidification device, including one-quarter of the fresh air volume and all of the return air. The air supplied by the lower side bulkhead air supply 3 originates from the second under-cabin air supply duct 3-1, which supplies dry fresh air, accounting for half of the total fresh air volume. The air supplied by the upper cabin space moisture-proof air supply 6 originates from the third under-cabin air supply duct 6-1, which supplies dry fresh air, accounting for one-quarter of the total fresh air volume.

[0016] Furthermore, for narrow-body passenger aircraft, the upper side bulkhead air outlet 2-1 is located at the junction of the aircraft side bulkhead and the overhead bins, with a discontinuous strip grille embedded inside, forming intermittent air supply along the fuselage direction. The discontinuous air supply position is the horizontal projection of the side top plate where the overhead bin humidification air outlet 4-3 is located onto the bulkhead, so that the horizontal airflow of the upper side bulkhead air outlet 2 and the longitudinal airflow of the overhead bin humidification air outlet 4 do not interfere with each other.

[0017] Furthermore, for narrow-body aircraft, the overhead luggage rack humidification vent 4-3 is spherical, which makes it easy for engineers to adjust the direction of the vent according to the actual installation conditions. After adjustment, the overhead luggage rack humidification vent 4-3 is angled towards the heads of the two passengers not near the window, mainly delivering the humidified air to the area where the two passengers are not near the window, creating a high humidity zone in this area.

[0018] Furthermore, for narrow-body passenger aircraft, the air supply speed of the overhead luggage rack humidification vent 4-3 is 3m / s to 3.5m / s.

[0019] Furthermore, for both narrow-body and wide-body passenger aircraft, the air supply velocity of the lower side bulkhead air outlet 3-3 is 1.2m / s to 1.6m / s.

[0020] Furthermore, for wide-body passenger aircraft, the cabin top moisture-proof air supply vent 6-3 and the upper side bulkhead moisture-proof air supply vent 6-4 are respectively at an angle of 20-30° to the air supply direction of the cabin top air supply vent 1-3 and the upper side bulkhead air supply vent 2-1. This causes the dry fresh air delivered by the cabin top air supply vent 6-3 and the upper side bulkhead air supply vent 6-4 to be delivered in different directions from the humidified mixed air delivered by the cabin top air supply vent 1-3 and the upper side bulkhead air supply vent 2-1, preventing them from mixing at the source and affecting the humidification and moisture-proof effect.

[0021] This invention introduces two different humidification schemes, taking narrow-body and wide-body passenger aircraft as examples. In the narrow-body aircraft, the humidification device 4-2 is located on the overhead luggage rack, primarily humidifying a portion of the mixed air in the humidification air supply branch duct 4-1. The humidified mixed air is then delivered to the passenger area via the overhead luggage rack humidification vent 4-3, humidifying the cabin environment of the narrow-body aircraft. In contrast, in the wide-body aircraft, the humidification device is located in the first cabin floor air supply main duct 1-1, humidifying the mixed air throughout the main duct. This ensures that the overhead air supply vent 1-3 and the upper side air supply vent 2-1 can deliver humidified air into the cabin, humidifying the cabin environment of the wide-body aircraft.

[0022] Compared with the prior art, the advantages of this invention are:

[0023] First, this invention humidifies the cabin environment by delivering moist air through humidification and ventilation, improving passenger comfort. Second, since the fresh air introduced by the engines during high-altitude cruising contains almost no moisture, a new moisture-proof ventilation system is added to deliver dry fresh air to flush the cabin walls in order to maximize the use of this dry fresh air. This reduces the moisture content in the air seeping through the cabin walls and effectively mitigates the cold radiation effect of the low-temperature cabin walls on passengers near the walls. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the flow field of a dual-layer hybrid ventilation system for existing narrow-body passenger aircraft.

[0025] Figure 2 This is a schematic diagram of the flow field of the narrow-body passenger aircraft of the present invention.

[0026] Figure 3 This is a schematic diagram of the flow field of a dual-layer hybrid ventilation system for existing wide-body passenger aircraft.

[0027] Figure 4 This is a schematic diagram of the flow field of the wide-body passenger aircraft of the present invention.

[0028] Figure 5 This is a front view of the overall air supply system of the narrow-body passenger aircraft of the present invention.

[0029] Figure 6 This is a three-dimensional schematic diagram of the overall air supply system of the narrow-body passenger aircraft of the present invention.

[0030] Figure 7 This is a front view of the overall air supply system of the wide-body passenger aircraft of the present invention.

[0031] Figure 8 This is a three-dimensional schematic diagram of the overall air supply system of the wide-body passenger aircraft of the present invention.

[0032] Figure 9 This is a three-dimensional schematic diagram of the overall air supply duct of the narrow-body passenger aircraft of the present invention.

[0033] Figure 10 This is a three-dimensional schematic diagram of the air supply and humidification air supply ductwork for the cabin ceiling and overhead luggage racks of the narrow-body passenger aircraft according to the present invention.

[0034] Figure 11 This is a three-dimensional schematic diagram of the air supply duct on the upper part of the side bulkhead of the narrow-body passenger aircraft according to the present invention.

[0035] Figure 12 This is a three-dimensional schematic diagram of the air supply duct in the lower part of the side bulkhead of the narrow-body passenger aircraft according to the present invention.

[0036] Figure 13 This is a three-dimensional schematic diagram of the overall air supply duct of the wide-body passenger aircraft of the present invention.

[0037] Figure 14This is a three-dimensional schematic diagram of the air supply ducts on the top of the cockpit and the upper part of the side bulkhead of the wide-body passenger aircraft according to the present invention.

[0038] Figure 15 This is a three-dimensional schematic diagram of the moisture-proof air supply duct in the upper space of the wide-body passenger aircraft cabin according to the present invention.

[0039] Figure 16 This is a three-dimensional schematic diagram of the air supply duct in the lower part of the side bulkhead of the wide-body passenger aircraft according to the present invention.

[0040] Figure 17 This is a schematic diagram showing the relative positions of the air vents and the cabin lining of the narrow-body passenger aircraft of the present invention.

[0041] Figure 18 This is a three-dimensional schematic diagram of the air supply vent on the upper part of the side bulkhead of the narrow-body passenger aircraft according to the present invention.

[0042] Figure 19 This is a schematic diagram showing the relative positions of the humidification device for narrow-body passenger aircraft and the humidification vents in the overhead luggage rack according to the present invention.

[0043] Figure 20 This is a three-dimensional schematic diagram of the humidification air vent for the overhead luggage rack of a narrow-body passenger aircraft according to the present invention.

[0044] Figure 21 This is a three-dimensional schematic diagram of the air outlet at the lower part of the side bulkhead of the present invention.

[0045] Figure 22 This is a three-dimensional schematic diagram showing the relative positions of the air inlet on the upper side bulkhead and the moisture-proof air inlet on the upper side bulkhead of the wide-body passenger aircraft according to the present invention.

[0046] In the diagram: 1. Air supply to the cabin roof; 1-1 First cabin floor air supply main duct; 1-2 First air supply riser duct; 1-3 Cabin roof air supply outlet; 2. Upper side bulkhead air supply; 2-1 Upper side bulkhead air supply outlet; 2-2 Second air supply riser duct; 3. Lower side bulkhead air supply; 3-1 Second cabin floor air supply main duct; 3-2 Third air supply riser duct; 3-3 Lower side bulkhead air supply outlet; 4. Luggage rack humidification air supply; 4-1 Humidification air supply branch duct; 4-2 Humidification device; 4-3 Luggage rack humidification vent; 5. Exhaust air; 6. Moisture-proof air supply to the upper cabin space; 6-1 Third cabin floor air supply main duct; 6-2 Fourth air supply riser duct; 6-3 Cabin roof moisture-proof air supply outlet; 6-4 Upper side bulkhead moisture-proof air supply outlet. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings.

[0048] This invention is an improved version of the existing dual-layer hybrid ventilation system, providing an airflow organization system for passenger aircraft with cabin humidification and bulkhead moisture protection functions. Figure 1 , Figure 3 , Figure 11 and Figure 14As shown, the existing dual-layer hybrid ventilation system includes a cabin top panel air supply 1, a side wall upper air supply 2, and an exhaust 5. The cabin top panel air supply 1 includes a first cabin bottom air supply main duct 1-1, a first air supply riser duct 1-2, and a cabin top panel air outlet 1-3; the side wall upper air supply 2 includes a side wall upper air outlet 2-1 and a second air supply riser duct 2-2; the lower ends of both the first air supply riser duct 1-2 and the second air supply riser duct 2-2 are connected to the first cabin bottom air supply main duct 1-1, and their upper ends are connected to the cabin top panel air outlet 1-3 and the side wall upper air outlet 2-3, respectively. 1. The first cabin bottom air supply duct 1-1 delivers mixed air from the aircraft mixing manifold through the first air supply riser 1-2 and the second air supply riser 2-2 to the cabin top air supply outlet 1-3 and the upper side air supply outlet 2-1, respectively. The cabin top air supply outlet 1-3 and the upper side air supply outlet 2-1 horizontally deliver mixed air into the cabin to fully mix with the cabin air. After that, the cabin air is discharged through the exhaust vent 5 located at the lower part of the side air supply wall.

[0049] The air supply system for passenger aircraft in this invention takes different forms in narrow-body and wide-body passenger aircraft. The following is a detailed description of narrow-body and wide-body passenger aircraft respectively.

[0050] Example 1

[0051] like Figure 2 As shown, for narrow-body passenger aircraft, the airflow organization system includes the existing cabin ceiling air supply 1, side bulkhead upper air supply 2 and exhaust 5, and adds a humidification mechanism and a moisture-proof air supply mechanism. The moisture-proof air supply mechanism is the side bulkhead lower air supply 3, and the humidification mechanism is the overhead luggage rack humidification air supply 4. The overhead air supply 1 and the upper side bulkhead air supply 2 horizontally deliver mixed air into the cabin, thoroughly mixing the cabin airflow. The lower side bulkhead air supply 3, following the cabin circulation direction, delivers dry fresh air upwards along the bulkhead, forming a wall-attached flow that accelerates the cabin circulation, making the mixing more uniform. Simultaneously, the resulting dry air curtain slows the penetration of humidified cabin air into the aircraft's insulation layer. This wall-attached flow then merges with the horizontal airflow from the upper side bulkhead air supply 2, continuing to mix the cabin air and ensuring a sufficient supply of fresh air. Similarly, the overhead luggage rack humidifying air supply 4, following the cabin circulation direction, tilts and delivers humidified air towards the areas of the two passengers not near windows. This avoids condensation caused by the humidified airflow blowing onto the cold bulkhead and allows the humidified air to reach the passenger areas along the cabin circulation, humidifying the cabin environment. Finally, the cabin air is exhausted by the exhaust air supply 5 located at the lower side bulkhead. Specifically:

[0052] like Figure 9 , Figure 10 and Figure 19As shown, the luggage rack humidification and air supply 4 includes a humidification and air supply branch pipe 4-1, a humidification device 4-2, and a luggage rack humidification air outlet 4-3. The humidification device 4-2 is connected to the first air supply riser pipe 1-2 via the humidification and air supply branch pipe 4-1. The luggage rack humidification air outlet 4-3 is spherical, and its structure is as follows... Figure 20 As shown, to facilitate the adjustment of the air vent orientation by engineers according to the actual installation conditions, the air vents are symmetrically arranged along the cabin aisle on the side ceiling above the two passengers not near the window, with two on each side. The two luggage rack humidification vents 4-3 on the same side are connected to the same humidification device 4-2. The humidification device 4-2 humidifies the mixed air diverted from the first air supply riser 1-2. The humidified air is tilted downward from the luggage rack humidification vents 4-3 and delivered to the area where the two passengers not near the window are located. The humidification air supply speed is 3m / s to 3.5m / s.

[0053] This invention features a specific design for the placement and airflow direction of the luggage rack humidifier vents 4-3. Unlike the centralized arrangement of personalized air vents in existing cabin luggage racks, the luggage rack humidifier vents 4-3 of this invention are arranged at larger intervals (the interval distance is based on the seat width) on the luggage rack diagonally above and in front of the two passengers not near the window, with two on each side. To minimize the penetration of humid air into the cabin wall, the luggage rack humidifier vents 4-3 are angled towards the heads of the two passengers not near the window, primarily delivering humidified air to the area where these passengers are located, creating a high-humidity zone. Simultaneously, due to the diffusion of moisture in the air and the thorough mixing effect of the mixed air supply system, a secondary high-humidity zone is formed in the area of ​​the passengers near the window. Furthermore, there are certain limitations on the airflow speed of the luggage rack humidifier vents 4-3. If the vent speed is too low, the humidified air cannot effectively reach the passengers' breathing area; if the speed is too high, it will cause passengers an uncomfortable draft. Based on computational fluid dynamics (CFD) simulation experience, the air velocity of the humidification vent 4-3 on the luggage rack is limited to the range of 3m / s to 3.5m / s.

[0054] like Figure 17 As shown, the upper air vent 2-1 of the side bulkhead is located at the junction of the aircraft side bulkhead and the overhead luggage rack, and its interior is embedded as follows: Figure 18 The discontinuous strip grilles shown form an intermittent air supply along the fuselage direction. The intermittent air supply position is the horizontal projection of the side top plate where the luggage rack humidification air outlet 4-3 is located onto the cabin wall, so that the horizontal airflow of the side cabin wall air supply 2 and the longitudinal airflow of the luggage rack humidification air supply 4 do not interfere with each other.

[0055] like Figure 5 , Figure 6 , Figure 9 and Figure 12As shown, the lower side bulkhead air supply 3 includes a second cabin floor air supply main duct 3-1, a third air supply riser duct 3-2, and a lower side bulkhead air supply outlet 3-3. The second cabin floor air supply main duct 3-1 is located adjacent to both side bulkheads and arranged along the fuselage direction under the cabin floor. The lower end of the third air supply riser duct 3-2 connects to the second cabin floor air supply main duct 3-1, and the upper end connects to the lower side bulkhead air supply outlet 3-3. The lower side bulkhead air supply outlet 3-3 is elongated and embedded in the bulkhead adjacent to the seat area along the fuselage direction. It has embedded louvers and adjustable airflow direction. The structure of the lower side bulkhead air supply outlet 3-3 is as follows: Figure 21 As shown; the second cabin bottom air supply duct 3-1 delivers treated dry fresh air, which is slightly warmer than the cabin temperature, through the third air supply riser duct 3-2 to the lower side bulkhead air supply vent 3-3. The lower side bulkhead air supply vent 3-3 sends dry fresh air upward along the bulkhead to wash over the cabin bulkhead (air supply velocity is 1.2m / s~1.6m / s), creating a relatively low humidity air curtain area near the bulkhead, which slows down the penetration of humid air in the cabin environment into the aircraft insulation layer through the gaps in the bulkhead.

[0056] This invention features a specific design for the airflow velocity of the lower side bulkhead air outlet 3-3. If the wind speed is too low, because the cabin side wall is a cold surface during aircraft cruise, the dry airflow rising along the wall will sag, preventing it from effectively merging with the horizontal airflow projected from the upper side bulkhead air outlet 2-1. If the wind speed is too high, it will cause an uncomfortable draft to the shoulders of passengers near the window. Based on CFD simulation experience, the wind speed of the lower side bulkhead air outlet 3-3 is limited to the range of 1.2 m / s to 1.6 m / s.

[0057] In this embodiment, the passenger aircraft airflow organization system adopts a total air volume supply form of 50% fresh air + 50% return air. The air supplied by the cabin ceiling air supply 1, the upper side bulkhead air supply 2, and the overhead luggage rack humidifying air supply 4 all come from the first cabin floor air supply duct 1-1. The first cabin floor air supply duct 1-1 supplies mixed air from the aircraft mixing manifold, including half of the fresh air volume and all of the return air. The air supplied by the lower side bulkhead air supply 3 comes from the second cabin floor air supply duct 3-1. The second cabin floor air supply duct 3-1 supplies dry fresh air, which accounts for half of the total fresh air volume.

[0058] Example 2

[0059] like Figure 4As shown, for wide-body passenger aircraft, the airflow organization system includes the existing cabin top panel air supply 1, side bulkhead upper air supply 2 and exhaust 5, and adds a humidification mechanism and a moisture-proof air supply mechanism. The humidification mechanism is a dry pipe humidification device, and the moisture-proof air supply mechanism includes side bulkhead lower air supply 3 and cabin upper space moisture-proof air supply 6. The overhead air supply 1 and the upper side wall air supply 2 horizontally deliver mixed air humidified by the dry pipe humidification device into the cabin, fully mixing the cabin airflow while humidifying the cabin environment; the lower side wall air supply 3 delivers dry fresh air upward along the cabin wall in accordance with the cabin circulation direction, forming a wall-attached flow, accelerating the movement of the cabin circulation, making the mixing more uniform, and at the same time the dry air curtain formed can slow down the penetration of the humidified cabin air into the aircraft insulation layer. Then, this wall-attached flow merges with the horizontal airflow delivered by the upper side wall air supply 2, continuing to mix the cabin air and ensuring the supply of fresh air in the cabin; the upper cabin space moisture-proof air supply 6 tilts upward in accordance with the cabin circulation direction to deliver dry fresh air to wash the cabin overhead luggage rack and cabin ceiling, and the dry air curtain formed can slow down the penetration of the humidified cabin air into the aircraft insulation layer.

[0060] The aforementioned dry pipe humidification device adopts the existing dry pipe cold evaporative humidifier (CTT Systems' Humidifier Onboard), which is arranged inside the first cabin bottom air supply main duct 1-1. It is used to humidify the mixed air transported in the entire first cabin bottom air supply main duct 1-1. The humidified mixed air is transported to the cabin top air supply outlet 1-3 and the upper side air supply outlet 2-1 through the first air supply riser duct 1-2 and the second air supply riser duct 2-2, respectively. The cabin top air supply outlet 1-3 and the upper side air supply outlet 2-1 horizontally deliver the humidified mixed air into the cabin, fully mixing the airflow in the cabin and humidifying the cabin environment.

[0061] like Figure 7 , Figure 8 , Figure 13 and Figure 16 As shown, the side bulkhead lower air supply 3 is the same as the side bulkhead lower air supply 3 in the narrow-body passenger aircraft in Embodiment 1 in terms of structure, arrangement and air supply method.

[0062] like Figure 7 , Figure 8 , Figure 13 and Figure 15As shown, the moisture-proof air supply 6 in the upper cockpit space includes a third cockpit floor air supply main duct 6-1, a fourth air supply riser duct 6-2, a moisture-proof air supply outlet 6-3 on the cockpit roof, and a moisture-proof air supply outlet 6-4 on the upper side bulkhead; the third cockpit floor air supply main duct 6-1 is located adjacent to the two side bulkheads and arranged along the fuselage direction under the cockpit floor; the lower end of the fourth air supply riser duct 6-2 is connected to the third cockpit floor air supply main duct 6-1, and the upper end is connected to the moisture-proof air supply outlet 6-3 on the cockpit roof and the moisture-proof air supply outlet 6-4 on the upper side bulkhead, respectively; as Figure 8 and Figure 21 As shown, the cabin ceiling moisture-proof air supply vent 6-3 is located above the cabin ceiling air supply vent 1-3 at the junction of the aisle ceiling and the side luggage rack. The cabin ceiling moisture-proof air supply vent 6-3 supplies air diagonally upwards, with its air supply direction forming an angle of 20° to 30° with the air supply direction of the cabin ceiling air supply vent 1-3. In this embodiment, it is 30° to prevent the dry fresh air and the humidified mixed air from mixing at the source, which would affect the humidification and moisture-proof effect. Figure 22 As shown, the moisture-proof air supply vent 6-4 on the upper part of the side bulkhead is closely attached to the upper part of the air supply vent 2-1 on the upper part of the side bulkhead and is arranged at the junction of the side bulkhead and the side luggage rack. The moisture-proof air supply vent 6-4 on the upper part of the side bulkhead supplies air obliquely upward, and its air supply direction is also at an angle of 20° to 30° with the air supply direction of the air supply vent 2-1 on the upper part of the side bulkhead. In this embodiment, it is 30°.

[0063] In this embodiment, the passenger aircraft airflow organization system adopts a total air volume supply form of 50% fresh air + 50% return air. The air supplied by the cabin ceiling air supply 1 and the upper side bulkhead air supply 2 both come from the first cabin bottom air supply main duct 1-1. The first cabin bottom air supply main duct 1-1 supplies mixed air from the aircraft mixing manifold after being humidified by the main duct humidifier, including one-quarter of the fresh air volume and all of the return air. The air supplied by the lower side bulkhead air supply 3 comes from the second cabin bottom air supply main duct 3-1. The second cabin bottom air supply main duct 3-1 supplies dry fresh air, which accounts for half of the total fresh air volume. The air supplied by the cabin upper space moisture-proof air supply 6 comes from the third cabin bottom air supply main duct 6-1. The third cabin bottom air supply main duct 6-1 supplies dry fresh air, which accounts for one-quarter of the total fresh air volume.

[0064] This invention designs different dehumidification schemes based on different humidification strategies. Scheme 1: Uses overhead luggage rack humidifying air supply 4 to humidify the cabin environment, and adds lower side bulkhead air supply 3 to dehumidify the cabin side bulkheads; Scheme 2: Uses a centralized humidification device with dry pipes to humidify the cabin ceiling air supply 1 and upper side bulkhead air supply 2 as a whole. In addition to adding lower side bulkhead air supply 3 to dehumidify the cabin side bulkheads, it also adds upper cabin space dehumidification air supply 6 to dehumidify the overhead luggage racks and ceiling. For ease of distinction, the above text describes the invention using narrow-body and wide-body passenger aircraft as examples of the application of the two schemes. However, it should be noted that narrow-body passenger aircraft are not limited to using Scheme 1, and wide-body passenger aircraft are not limited to using Scheme 2. Both narrow-body and wide-body passenger aircraft can choose between the two schemes according to actual flight needs and airline requirements, and both schemes are applicable to existing aircraft models.

[0065] Although the present invention has been described above in conjunction with the accompanying diagrams, the present invention is not limited to the specific embodiments described above, nor is it limited to only those described above. Figure 1 and Figure 3 Any improvements made to the dual-layer hybrid ventilation system shown, or similar improvements made to any hybrid ventilation system used in existing commercial aircraft, are within the scope of protection of this invention.

Claims

1. A passenger aircraft air flow organization system with in-cabin humidification and cabin wall moisture-proof functions, which is improved on the basis of an existing double-layer mixed ventilation system, the existing double-layer mixed ventilation system comprising a cabin roof air supply (1), a side cabin wall upper air supply (2) and an air exhaust (5); wherein, The cabin roof air supply (1) comprises a first cabin bottom air supply trunk (1-1), a first air supply riser (1-2) and a cabin roof air supply port (1-3); the upper side cabin wall air supply (2) comprises an upper side cabin wall air supply port (2-1) and a second air supply riser (2-2); the lower ends of the first air supply riser (1-2) and the second air supply riser (2-2) are communicated with the first cabin bottom air supply trunk (1-1), and the upper ends thereof are communicated with the cabin roof air supply port (1-3) and the upper side cabin wall air supply port (2-1) respectively; the first cabin bottom air supply trunk (1-1) delivers mixed air from the aircraft mixing manifold to the cabin roof air supply port (1-3) and the upper side cabin wall air supply port (2-1) through the first air supply riser (1-2) and the second air supply riser (2-2) respectively, the cabin roof air supply port (1-3) and the upper side cabin wall air supply port (2-1) horizontally deliver the mixed air into the cabin, and then the air in the cabin is discharged by the air exhaust (5) located at the lower part of the side cabin wall; characterized in that the passenger aircraft air flow organization system further comprises a humidifying mechanism and a dry air supply mechanism; for a narrow-body passenger aircraft, the humidifying mechanism is a luggage rack humidifying air supply (4), and the dry air supply mechanism is a lower side cabin wall air supply (3); The luggage rack humidifying air supply (4) comprises a humidifying air supply branch pipe (4-1), a humidifying device (4-2) and a luggage rack humidifying air port (4-3); the humidifying device (4-2) is communicated with the first air supply riser (1-2) through the humidifying air supply branch pipe (4-1), the luggage rack humidifying air port (4-3) is symmetrically arranged on the luggage rack along the cabin aisle and is connected with the humidifying device (4-2), and delivers humidified mixed air to the obliquely downward direction. The lower side cabin wall air supply (3) comprises a second cabin bottom air supply trunk (3-1), a third air supply riser (3-2) and a lower side cabin wall air supply port (3-3); the second cabin bottom air supply trunk (3-1) is arranged at the lower part of the cabin floor along the direction of the fuselage body and close to the two side cabin walls, the lower end of the third air supply riser (3-2) is communicated with the second cabin bottom air supply trunk (3-1), and the upper end thereof is communicated with the lower side cabin wall air supply port (3-3); the lower side cabin wall air supply port (3-3) is inlaid in the cabin wall close to the seat area along the direction of the fuselage body, and delivers dry fresh air to the cabin wall in the upward direction to flush the cabin wall.

2. The passenger aircraft air distribution system having in-cabin humidification and cabin wall dehumidification functionality of claim 1, wherein, The air delivered by the cabin roof air supply (1), the upper side cabin wall air supply (2) and the luggage rack humidifying air supply (4) all comes from the first cabin bottom air supply trunk (1-1), the first cabin bottom air supply trunk (1-1) delivers mixed air from the aircraft mixing manifold, which includes half of the fresh air and all of the return air; the air delivered by the lower side cabin wall air supply (3) comes from the second cabin bottom air supply trunk (3-1), and the second cabin bottom air supply trunk (3-1) delivers dry fresh air accounting for half of the total fresh air.

3. The passenger aircraft air distribution system having in-cabin humidification and cabin wall moisture barrier functionality of claim 1, wherein, The upper side bulkhead air outlet (2-1) is arranged at the junction of the aircraft side bulkhead and the luggage rack, and the discontinuous strip-shaped grid is embedded in the upper side bulkhead air outlet (2-1), so that the dry air is sent in the direction of the fuselage, and the projection of the dry air outlet (4-3) on the horizontal bulkhead is at the position of the luggage rack humidification air outlet (4-3), so that the horizontal air flow of the upper side bulkhead air outlet (2) and the longitudinal air flow of the luggage rack humidification air outlet (4) do not interfere with each other.

4. The passenger aircraft air distribution system having in-cabin humidification and cabin wall moisture barrier functionality of claim 1, wherein, The luggage rack humidification air outlet (4-3) is spherical, which is used for adjusting the direction of the air outlet.

5. The passenger aircraft air distribution system having in-cabin humidification and cabin wall moisture barrier functionality of claim 1 or 4, wherein, The air supply speed of the luggage rack humidification air outlet (4-3) is 3-3.5 m / s.

6. The passenger aircraft air distribution system having in-cabin humidification and cabin wall moisture barrier functionality of claim 1, wherein, For wide-body aircraft, the humidification mechanism is a dry pipe humidification device, and the dry air supply mechanism includes a lower side bulkhead air outlet (3) and a cabin upper space dry air supply (6). The dry pipe humidification device is arranged inside the first cabin bottom air supply dry pipe (1-1), and the mixed air in the dry pipe is concentratedly humidified. The humidified mixed air is transported to the cabin ceiling air outlet (1-3) and the upper side bulkhead air outlet (2-1) through the first air supply rising pipe (1-2) and the second air supply rising pipe (2-2) respectively, and is horizontally delivered into the cabin. The lower side bulkhead air outlet (3) includes a second cabin bottom air supply dry pipe (3-1), a third air supply rising pipe (3-2) and a lower side bulkhead air outlet (3-3). The second cabin bottom air supply dry pipe (3-1) is arranged below the cabin floor along the direction of the fuselage and close to the two side bulkheads. The lower end of the third air supply rising pipe (3-2) is communicated with the second cabin bottom air supply dry pipe (3-1), and the upper end is communicated with the lower side bulkhead air outlet (3-3). The lower side bulkhead air outlet (3-3) is embedded in the bulkhead close to the seat area along the direction of the fuselage, and the dry fresh air is delivered upward along the bulkhead to flush the cabin bulkhead. The cabin upper space dry air supply (6) includes a third cabin bottom air supply dry pipe (6-1), a fourth air supply rising pipe (6-2), a cabin ceiling dry air outlet (6-3) and a upper side bulkhead dry air outlet (6-4). The third cabin bottom air supply dry pipe (6-1) is arranged below the cabin floor along the direction of the fuselage and close to the two side bulkheads. The lower end of the fourth air supply rising pipe (6-2) is communicated with the third cabin bottom air supply dry pipe (6-1), and the upper end is communicated with the cabin ceiling dry air outlet (6-3) and the upper side bulkhead dry air outlet (6-4) respectively. The cabin ceiling dry air outlet (6-3) and the upper side bulkhead dry air outlet (6-4) are arranged close to the upper part of the cabin ceiling air outlet (1-3) and the upper part of the upper side bulkhead air outlet (2-1) respectively, and the dry fresh air is delivered obliquely upward to flush the cabin ceiling and the luggage rack.

7. The passenger aircraft air distribution system having in-cabin humidification and cabin wall dehumidification functionality of claim 6, wherein, The air sent by the cabin roof air supply (1) and the side cabin wall upper air supply (2) is from the first cabin bottom air supply dry pipe (1-1), which transports mixed air humidified by the dry pipe humidification device from the aircraft mixing manifold, including one fourth of the fresh air volume and all the return air; the air sent by the side cabin wall lower air supply (3) is from the second cabin bottom air supply dry pipe (3-1), which transports dry fresh air accounting for half of the total fresh air volume; the air sent by the cabin upper space moisture-proof air supply (6) is from the third cabin bottom air supply dry pipe (6-1), which transports dry fresh air accounting for one fourth of the total fresh air volume.

8. The passenger aircraft air distribution system having in-cabin humidification and cabin wall moisture barrier functionality of claim 6, wherein, The cabin roof moisture-proof air supply port (6-3) and the side cabin wall upper moisture-proof air supply port (6-4) are respectively at an angle of 20-30° with the air supply direction of the cabin roof air supply port (1-3) and the side cabin wall upper air supply port (2-1).

9. The passenger aircraft air distribution system having in-cabin humidification and cabin wall moisture barrier functionality of claim 1 or 6, wherein, The side cabin wall lower air supply port (3-3) is in a long strip shape, embedded with adjustable louvered air direction.

10. The passenger aircraft air distribution system having in-cabin humidification and cabin wall moisture barrier functionality of claim 9, wherein, The air supply speed of the side cabin wall lower air supply port (3-3) is 1.2-1.6 m / s.

Images