Fan device and aircraft equipped with the fan device

Abstract

The fan device includes a fan (10) that generates an air flow, a rotor core (20) disposed on the outer side in the radial direction of the fan (10), a stator core (40) opposed to the rotor core (20), a housing (30) that forms an inner peripheral surface (31) surrounding the fan (10) and has a housing space (32) formed therein for housing the rotor core (20) and the stator core (40), and a compressor (70). The inner peripheral surface (31) has a cylindrical surface (31a) and a nozzle surface (31b). The housing (30) defines therein a cooling flow path (Pc) for guiding compressed air to the housing space (32), and a housing-side flow path (Ph) for guiding compressed air to a boundary air outlet (33) formed near the boundary between the cylindrical surface (31a) and the nozzle surface (31b). The boundary air outlet (33) faces the direction in which compressed air is blown out along the nozzle surface (31b) in the flow direction.

Description

Technical Field

[0001] The present disclosure relates to a fan device and an aircraft equipped with the fan device. Background Art

[0002] An electric fan used in an eVTOL aircraft (eVTOL: electric Vertical Take-Off and Landing) is, for example, a fan with a duct (so-called ducted fan). The ducted fan is roughly divided into two drive types. The first is an inner peripheral drive type in which a hub connected with a plurality of blades is rotated by a motor. The second is an outer peripheral drive type in which a motor is constituted by a rotor core provided at the front end of a blade and a stator core provided so as to face the rotor core, and the fan is rotated by the motor.

[0003] The motor used in such an electric fan requires a large motor capacity. Therefore, cooling of the motor is indispensable when the electric fan is operating. For example, in an outer peripheral drive type electric fan, it is necessary to cool the rotor core provided on the front end side of the blade and the stator core provided so as to face the rotor core (Patent Document 1).

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2020-93706 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] However, unlike an eVTOL aircraft, a normal helicopter sometimes has an autorotation function. The autorotation function refers to the following function: when the engine fails, by cutting off the link between the engine and the propeller and appropriately changing the angle of attack of the blade, the descending energy is converted into the rotation of the propeller to ensure lift.

[0009] However, in an eVTOL aircraft, the electric fan is smaller than the propeller of a helicopter, and in many cases, the angle of attack of the blade is not made variable in order to avoid complication and enlargement of the device. Therefore, in an eVTOL aircraft, the autorotation function such as that of a helicopter cannot be used.

[0010] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a fan device that can obtain a certain thrust even when the fan stops and can cool the motor during normal operation, and an aircraft equipped with the fan device.

[0011] Means for Solving the Problems

[0012] To solve the above problems, the fan device of the present disclosure and the aircraft equipped with the fan device adopt the following means.

[0013] That is, a fan device according to an aspect of the present disclosure includes: a fan having a plurality of blades extending in the radial direction with respect to a rotation axis and generating an air flow by rotating around the rotation axis; a rotor core provided outside the fan in the radial direction; a stator core provided at a position facing the rotor core in the radial direction; a housing forming an inner peripheral surface surrounding the fan around the rotation axis and having a housing space for accommodating the rotor core and the stator core formed therein; and a compressor for compressing air. The inner peripheral surface has: a cylindrical surface; and a nozzle surface that expands in diameter toward the outside in the radial direction along the rotation axis on the downstream side of the cylindrical surface in the flow direction of the air flow. The housing defines a cooling flow path and a housing-side flow path inside. The cooling flow path guides compressed air from the compressor to the housing space, and the housing-side flow path guides compressed air from the compressor to a boundary blowout port formed near the boundary between the cylindrical surface and the nozzle surface. The boundary blowout port faces a direction in which compressed air is blown out along the nozzle surface in the flow direction.

[0014] In addition, an aircraft according to an aspect of the present disclosure includes the above-described fan device.

[0015] Advantageous Effects of the Invention

[0016] According to the fan device of the present disclosure and the aircraft equipped with the fan device, a certain thrust can be obtained even when the fan stops, and in normal operation, the motor can be cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of an aircraft according to an embodiment of the present disclosure.

[0018] Figure 2 is a longitudinal sectional view of a fan device according to an embodiment of the present disclosure.

[0019] Figure 3 is a diagram showing an example of the shapes of the boundary blowout port, the trailing edge blowout port, and the boss blowout port.

[0020] Figure 4 is a diagram showing an example of the shapes of the boundary blowout port, the trailing edge blowout port, and the boss blowout port.

[0021] Figure 5 is a diagram showing an example of the shapes of the boundary blowout port, the trailing edge blowout port, and the boss blowout port.

[0022] Figure 6 This is a diagram showing an example of the shape of the boss air outlet.

[0023] Figure 7 This is a longitudinal sectional view of a modified example of a fan device according to an embodiment of the present disclosure.

[0024] Figure 8 This is a perspective view of a modified example of an aircraft according to an embodiment of the present disclosure.

[0025] Figure 9 This is a perspective view of a modified example of an aircraft according to an embodiment of the present disclosure.

[0026] Figure 10 This is Figure 9 a cross-sectional view taken along the cutting line X-X shown. Detailed Embodiment

[0027] Hereinafter, a fan device according to an embodiment of the present disclosure and an aircraft including the fan device will be described with reference to the accompanying drawings.

[0028] As Figure 1 shown, the fan device 1 is provided on the aircraft 100A.

[0029] The fan device 1 is a device that uses electricity as a power source to generate the thrust required for takeoff, landing, flight, etc. of the aircraft 100A.

[0030] The fan device 1 is configured to be tiltable relative to the airframe. That is, the aircraft 100A is a so-called eVTOL aircraft capable of vertical takeoff and landing.

[0031] As Figure 1 and Figure 2 shown, the fan device 1 includes a fan 10, a rotor core 20, a duct 30, a stator core 40, and a compressor 70.

[0032] As Figure 2 shown, the fan 10 is a device that generates an air flow by rotating around the rotation axis X. In this figure, the fan 10 generates an air flow in the direction from top to bottom. The fan 10 has a hub 11, a plurality of blades 12, and a rim 13.

[0033] The hub 11 is a member located at the center of the fan 10 on the rotation axis X and serving as the rotation center of the fan 10. The hub 11 is pivotally supported by a boss 50 so as to be rotatable.

[0034] The boss 50 is a columnar member extending along the rotation axis X. The boss 50 is connected to and supported by the inner peripheral surface 31 of the duct 30 described later via a plurality of support members 60.

[0035] The support member 60 is a member that is radially arranged with respect to the rotation axis X and rigidly connects the boss 50 to the inner peripheral surface 31 of the conduit 30.

[0036] It should be noted that the fan 10 can be of a type in which the hub 11 is rotatably supported by the boss 50, or can be a so-called shaftless type in which the boss 50 is omitted.

[0037] The base end of the blade 12 is connected and fixed to the hub 11. The blade 12 extends in the radial direction with respect to the rotation axis X. The blade 12 rotates around the rotation axis X together with the hub 11.

[0038] The front ends of the plurality of blades 12 are connected by a single rim 13. The rim 13 is a member formed in a ring shape around the rotation axis X. The rim 13 rotates around the rotation axis X together with the blade 12.

[0039] The rotor core 20 is a component that, together with the stator core 40 described later, constitutes an outer peripheral drive type motor. The rotor core 20 is fixed to the outer side in the radial direction of the rim 13. The rotor core 20 includes a magnetic member (such as a magnet). The rotor core 20 rotates around the rotation axis X together with the rim 13.

[0040] The conduit 30 is a member that rectifies the air flow generated by the fan 10. The conduit 30 is a cylindrical member that surrounds the fan 10 around the rotation axis X. The conduit 30 has an inner peripheral surface 31 and a housing space 32.

[0041] The inner peripheral surface 31 is a surface formed so as to surround the fan 10. The inner peripheral surface 31 includes a cylindrical surface 31a and a nozzle surface 31b.

[0042] The cylindrical surface 31a is a cylindrical surface having a substantially constant inner diameter along the rotation axis X. The cylindrical surface 31a surrounds the hub 11, the blade 12, the boss 50, the support member 60, etc. It should be noted that the cylindrical surface 31a does not necessarily have to have a substantially constant inner diameter, as long as it is a surface that can roughly distinguish the boundary from the nozzle surface 31b described later.

[0043] The nozzle surface 31b is a nozzle surface-shaped surface having an inner diameter that expands along the rotation axis X. The inner diameter of the nozzle surface 31b expands as it goes from the upstream to the downstream. The nozzle surface 31b is continuously and smoothly connected to the downstream end of the cylindrical surface 31a. In the case of this figure, the cross-sectional shape of the nozzle surface 31b is linear. However, it is not limited to this shape, and the cross-sectional shape can also be curved. That is, the nozzle surface 31b can also be a curved surface.

[0044] It should be noted that the above-mentioned "upstream" and "downstream" refer to the upstream and downstream in the flow direction of the air flow generated by the fan 10.

[0045] The accommodation space 32 is a space formed inside the conduit 30. The accommodation space 32 is formed in a ring shape around the rotation axis X. The accommodation space 32 accommodates the rotor core 20 and the stator core 40. The accommodation space 32 communicates with the space surrounded by the conduit 30, that is, the space where the fan 10 is disposed, via the opening 35.

[0046] The opening 35 is formed in a ring shape around the rotation axis X so as to face the rotation axis X. The rim 13 of the fan 10 is disposed in a state of blocking the opening 35. At this time, the rim 13 is substantially coplanar with the inner peripheral surface 31. Thereby, the air flow generated by the fan 10 can flow smoothly.

[0047] The stator core 40 is a component that constitutes an outer peripheral drive type motor together with the aforementioned rotor core 20. The stator core 40 has an iron core and a coil wound around the iron core. The stator core 40 is configured to generate a magnetic force by passing an electric current. The stator core 40 is disposed to face the rotor core 20 with a predetermined gap in the radial direction with respect to the rotation axis X.

[0048] In the conduit 30 configured as described above, a cooling flow path Pc, a housing side flow path Ph, a communication flow path Ps, a boundary air outlet 33, and a trailing edge air outlet 34 are provided.

[0049] The cooling flow path Pc is a flow path defined inside the conduit 30 and communicating the outside of the conduit 30 with the accommodation space 32. A compressor 70 is connected to the cooling flow path Pc. Thereby, the air (compressed air) compressed by the compressor 70 can be guided to the accommodation space 32. It should be noted that, in this figure, the flow direction of the compressed air is indicated by a solid arrow.

[0050] The compressor 70 is provided outside the conduit 30 (refer to Figure 1 ). It should be noted that Figure 1 the installation position is an example and is not limited to this installation position.

[0051] As Figure 2 shown, the compressed air guided to the accommodation space 32 flows in the gap between the rotor core 20 and the stator core 40 and flows out to the outside of the accommodation space 32. In the case of this figure, the compressed air flows out to the outside of the conduit 30. At this time, the compressed air cools the rotor core 20 and the stator core 40 while passing through the gap between the rotor core 20 and the stator core 40. Thereby, the outer peripheral drive type motor can be cooled.

[0052] The housing side flow path Ph is a flow path defined inside the conduit 30 and communicating with the outside of the conduit 30. The housing side flow path Ph is connected to the compressor 70 independently of the cooling flow path Pc. The housing side flow path Ph has a plurality of flow paths Ph0, Ph1, Ph2, Ph3.

[0053] The flow path Ph0 is a flow path defined inside the duct 30 and communicating with the outside of the duct 30. The flow path Ph0 is connected to the compressor 70 independently of the cooling flow path Pc. Thus, the air compressed by the compressor 70 can be guided to the housing-side flow path Ph.

[0054] The flow path Ph1 is a flow path defined inside the duct 30 and connecting the flow path Ph0 to the boundary blowout port 33. Thus, the air compressed by the compressor 70 can be guided to the boundary blowout port 33.

[0055] The boundary blowout port 33 is an opening provided near the boundary between the cylindrical surface 31a and the nozzle surface 31b. The boundary blowout port 33 faces the direction of blowing out compressed air along the nozzle surface 31b.

[0056] The compressed air blown out from the boundary blowout port 33 flows along the nozzle surface 31b in the flow direction of the air current. Thus, due to the ejector effect (the principle of an ejector), air flows into the inside of the inner peripheral surface 31 of the duct 30. As a result, an air current different from the air current generated by the fan 10 is generated (hereinafter referred to as the "air current of the ejector effect"). Through the air current of the ejector effect, for example, even when the fan 10 stops, a certain thrust can be obtained using the compressed air as a power source. It should be noted that the "thrust" mentioned here refers to the thrust that replaces the lift force exerted by the autorotation function of the helicopter, that is, the force that resists the descent of the aircraft 100A.

[0057] In addition, when the fan 10 is operating, the air current of the ejector effect becomes an additional thrust.

[0058] The flow path Ph2 is a flow path defined inside the duct 30 and connecting the flow path Ph0 to the trailing-edge blowout port 34. Thus, the air compressed by the compressor 70 can be guided to the trailing-edge blowout port 34.

[0059] The trailing-edge blowout port 34 is an opening provided at the trailing edge of the nozzle surface 31b (the trailing edge of the duct 30). The boundary blowout port 33 faces the direction of blowing out compressed air in the flow direction of the air current generated by the fan 10.

[0060] The compressed air blown out from the trailing-edge blowout port 34 is blown out in the flow direction of the air current generated by the fan 10. Thus, the air current flowing along the nozzle surface 31b can be attracted, and separation can be suppressed.

[0061] The flow path Ph3 is a flow path defined inside the duct 30 and connecting the flow path Ph0 to the communication flow path Ps. Thus, the air compressed by the compressor 70 can be guided to the communication flow path Ps.

[0062] The communication flow path Ps is a flow path defined inside the support member 60 of the support boss 50 and extending toward the boss 50.

[0063] The boss side flow path Pb and the boss blowout port 51 are provided in the boss 50. The boss side flow path Pb is a flow path that connects the communication flow path Ps and the boss blowout port 51. Thereby, the air compressed by the compressor 70 can be guided to the boss blowout port 51.

[0064] The boss blowout port 51 is an opening provided on the downstream end face of the boss 50. The boss blowout port 51 faces the direction in which the compressed air is blown out in the flow direction of the air flow generated by the fan 10.

[0065] The compressed air blown out from the boss blowout port 51 is blown out in the flow direction of the air flow generated by the fan 10. Thereby, it is possible to suppress the peeling of the air flow on the end face of the boss 50.

[0066] As Figure 3 shown, when viewed from the direction of the rotation axis X, the boundary blowout port 33, the trailing edge blowout port 34, and the boss blowout port 51 described above may also be annular openings centered on the rotation axis X. In addition, as Figure 4 shown, it may also be composed of a plurality of arc-shaped openings centered on the rotation axis X. In addition, as Figure 5 shown, it may also be composed of a plurality of circular openings arranged at equal intervals centered on the rotation axis X.

[0067] In addition, in addition to the Figures 3 to 5 shape shown, the boss blowout port 51 may also be a circular opening centered on the rotation axis X as Figure 6 shown.

[0068] As Figure 2 shown, a valve 81 may also be provided between the cooling flow path Pc and the compressor 70. Thereby, when the cooling of the motor is not required, all of the compressed air can be guided to the housing side flow path Ph.

[0069] A situation where the cooling of the motor is not required is, for example, a situation where the fan 10 stops driving due to a failure. This is because if the fan 10 does not drive, the motor does not generate heat.

[0070] In such a situation, in order to ensure the thrust to replace the automatic rotation function by the air flow using the ejector effect, it is beneficial to guide all of the compressed air to the housing side flow path Ph to maximize the thrust.

[0071] In addition, valves (not shown) may also be provided on the flow paths Ph1, Ph2, and Ph3 respectively. Thereby, the flow rate of the compressed air blown out from each blowout port can be appropriately adjusted.

[0072] Note that the boundary air outlet 33 is a necessary structure for the airflow that generates the ejector effect. However, the trailing-edge air outlet 34 and the boss air outlet 51 are not necessary structures for generating the airflow of the ejector effect. Therefore, the trailing-edge air outlet 34 and / or the boss air outlet 51 can also be omitted from the fan device 1.

[0073] Note that in the case of the shaftless type of fan device 1 without the support member 60, the boss air outlet 51 is not required.

[0074] According to the present embodiment, the following effects are achieved.

[0075] In a so-called outer peripheral drive type electric fan, the compressed air compressed by the compressor 70 can be guided to the accommodation space 32 that houses the rotor core 20 and the stator core 40 serving as a motor via the cooling flow path Pc. Thereby, it is possible to forcibly cool the motor (the rotor core 20 and the stator core 40), which is also a heat source.

[0076] In addition, the compressed air can be blown out from the boundary air outlet 33 formed near the boundary between the cylindrical surface 31a and the nozzle surface 31b. At this time, the compressed air from the boundary air outlet 33 is blown out along the nozzle surface 31b in the flow direction of the airflow generated by the fan 10. Thereby, due to the ejector effect (the principle of an ejector), air flows into the inside of the inner peripheral surface 31 of the duct 30. As a result, an airflow different from the airflow generated by the fan 10 (hereinafter referred to as "the airflow of the ejector effect") is generated. By this airflow of the ejector effect, for example, a certain thrust can be obtained even when the fan 10 stops. In addition, when the fan 10 is operating, the airflow of the ejector effect becomes an additional thrust.

[0077] In addition, the compressed air can be blown out from the trailing-edge air outlet 34 formed at the trailing edge in the flow direction of the nozzle surface 31b. At this time, the compressed air from the trailing-edge air outlet 34 is blown out in the flow direction of the airflow generated by the fan 10. Thereby, it is possible to attract the airflow flowing along the nozzle surface 31b and suppress separation, and thus it is possible to further increase the thrust.

[0078] In addition, the compressed air can be blown out from the boss air outlet 51 formed on the end surface of the boss 50 via the communication flow path Ps and the boss-side flow path Pb. At this time, the compressed air from the boss air outlet 51 is blown out in the flow direction of the airflow generated by the fan 10. Thereby, it is possible to suppress the separation of the airflow on the end surface of the boss 50. As a result, it is possible to reduce the air resistance of the end surface of the boss 50.

[0079] In addition, when the cooling flow path Pc and the housing-side flow path Ph are independent flow paths, it is possible to set the flow rate of the compressed air corresponding to their respective purposes.

[0080] In addition, when the housing side flow path Ph (flow path Ph0) communicates with the accommodation space 32, the compressed air guided to the accommodation space 32 can be blown out from each of the air outlets 33, 34, and 51. That is, the cooling of the motor and the blowing out of the compressed air can be carried out with a single path and a simple structure.

[0081] [Modification Example 1]

[0082] As Figure 7 shown, it is also possible to make the flow path Ph0 of the housing side flow path Ph communicate with the accommodation space 32. In this case, the flow path Ph0 is not directly connected to the compressor 70, but is indirectly connected to the compressor 70 via the cooling flow path Pc and the accommodation space 32.

[0083] Thereby, the compressed air introduced into the accommodation space 32 can be blown out from the boundary air outlet 33, the trailing edge air outlet 34, and the boss air outlet 51. That is, the cooling of the motor and the blowing out of the compressed air can be carried out with a single path and a simple structure.

[0084] [Modification Example 2]

[0085] In addition, as Figure 8 shown, a plurality of fan devices 1 can also form a multi-fan 101. In this case, the aircraft 100B is provided with a plurality of multi-fans 101. Compressed air can also be supplied from the common compressor 70 to the fan devices 1 included in each multi-fan 101.

[0086] [Modification Example 3]

[0087] In addition, as Figure 9 and Figure 10 shown, the fan device 1 can also be assembled to the wing 102 of the aircraft 100C. In this case, instead of the duct 30, the inner peripheral surface 31, each air outlet, and each flow path are formed on the wing 102.

[0088] The embodiments described above can be grasped as follows, for example.

[0089] That is, a fan device (1) according to one aspect of the present disclosure includes: a fan (10) having a plurality of blades (12) extending in the radial direction with respect to a rotation axis (X), and generating an air flow by rotating around the rotation axis (X); a rotor core (20) provided outside the fan (10) in the radial direction; a stator core (40) provided at a position facing the rotor core (20) in the radial direction; a housing (30, 102) forming an inner peripheral surface (31) surrounding the fan (10) around the rotation axis (X), and having a housing space (32) formed therein for housing the rotor core (20) and the stator core (40); and a compressor (70) for compressing air. The inner peripheral surface (31) has: a cylindrical surface (31a); and a nozzle surface (31b) that expands in diameter outward in the radial direction along the rotation axis (X) on the downstream side of the cylindrical surface (31a) in the flow direction of the air flow. The housing (30, 102) defines a cooling flow path (Pc) and a housing-side flow path (Ph) inside. The cooling flow path (Pc) guides compressed air from the compressor (70) to the housing space (32). The housing-side flow path (Ph) guides compressed air from the compressor (70) to a boundary blowout port (33) formed near the boundary between the cylindrical surface (31a) and the nozzle surface (31b). The boundary blowout port (33) faces a direction in which compressed air is blown out along the nozzle surface (31b) in the flow direction.

[0090] In the fan device (1) according to this aspect, in a so-called outer peripheral drive type electric fan, the compressed air compressed by the compressor (70) can be guided to the housing space (32) housing the rotor core (20) and the stator core (40) as a drive unit via the cooling flow path (Pc). Thereby, it is possible to forcibly cool the motor (the rotor core (20) and the stator core (40)), which is also a heat source.

[0091] In addition, compressed air can be blown out from the boundary blowout port (33) formed near the boundary between the cylindrical surface (31a) and the nozzle surface (31b). At this time, the compressed air from the boundary blowout port (33) is blown out along the nozzle surface (31b) in the flow direction of the air flow generated by the fan (10). Thereby, due to the ejector effect (the principle of an ejector), air flows into the inside of the inner peripheral surface (31) of the housing (30, 102). As a result, an air flow different from the air flow generated by the fan (10) (hereinafter referred to as "the air flow of the ejector effect") is generated. By this air flow of the ejector effect, for example, a certain thrust can be obtained even when the fan (10) stops. In addition, when the fan (10) is operating, the air flow of the ejector effect becomes an additional thrust.

[0092] Further, in the fan device (1) according to one aspect of the present disclosure, the housing side flow path (Ph) guides compressed air to a trailing edge blowout port (34) formed at the trailing edge in the flow direction of the nozzle surface (31b), and the trailing edge blowout port (34) faces the direction in which compressed air is blown out in the flow direction.

[0093] According to the fan device (1) of this aspect, compressed air can be blown out from the trailing edge blowout port (34) formed at the trailing edge in the flow direction of the nozzle surface (31b). At this time, the compressed air from the trailing edge blowout port (34) is blown out in the flow direction of the air flow generated by the fan (10). Thereby, the air flow flowing along the nozzle surface (31b) can be attracted and peeling can be suppressed, so that the thrust can be further increased.

[0094] In addition, the fan device (1) according to one aspect of the present disclosure includes: a boss (50) that rotatably supports the fan (10) around the rotation axis (X); and a support member (60) that supports the boss (50) with respect to the housing (30, 102). The support member (60) defines a communication flow path (Ps) inside that guides compressed air from the housing side flow path (Ph) to the boss (50) side. The boss (50) defines a boss side flow path (Pb) inside that guides compressed air from the communication flow path (Ps) to a boss blowout port (51) formed on the downstream side end surface in the flow direction. The boss blowout port (51) faces the direction in which compressed air is blown out in the flow direction.

[0095] According to the fan device (1) of this aspect, compressed air can be blown out from the boss blowout port (51) formed on the end surface of the boss (50) via the communication flow path (Ps) and the boss side flow path (Pb). At this time, the compressed air from the boss blowout port (51) is blown out in the flow direction of the air flow generated by the fan (10). Thereby, peeling of the air flow on the end surface of the boss (50) can be suppressed. As a result, the air resistance of the end surface of the boss (50) can be reduced.

[0096] In addition, in the fan device (1) according to one aspect of the present disclosure, it may be that the cooling flow path (Pc) and the housing side flow path (Ph) are independent flow paths.

[0097] According to the fan device (1) of this aspect, since the cooling flow path (Pc) and the housing side flow path (Ph) are independent flow paths, the flow rate of compressed air corresponding to each purpose can be set.

[0098] In addition, in the fan device (1) according to one aspect of the present disclosure, it may be that the housing side flow path (Ph) communicates with the accommodation space (32).

[0099] In the fan device (1) according to this solution, the housing side flow path (Ph) communicates with the accommodation space (32), so that the compressed air guided to the accommodation space (32) can be blown out from each air outlet (33, 34, 51). That is, the cooling of the motor and the blowing out of the compressed air can be carried out with a single path and a simple structure.

[0100] In addition, in the fan device (1) according to one solution of the present disclosure, the housing (30) is a duct (30).

[0101] In addition, in the fan device (1) according to one solution of the present disclosure, the housing (102) is a wing (102) of an aircraft (100C).

[0102] In addition, an aircraft (100A, 100B, 100C) according to one solution of the present disclosure includes the above-mentioned fan device (1).

[0103] Explanation of reference numerals:

[0104] 1... Fan device;

[0105] 10... Fan;

[0106] 11... Hub;

[0107] 12... Blade;

[0108] 13... Rim;

[0109] 20... Rotor core;

[0110] 30... Duct (housing);

[0111] 31... Inner peripheral surface;

[0112] 31a... Cylindrical surface;

[0113] 31b... Nozzle surface;

[0114] 32... Accommodation space;

[0115] 33... Boundary air outlet;

[0116] 34... Trailing edge air outlet;

[0117] 35... Opening;

[0118] 40... Stator core;

[0119] 50... Boss;

[0120] 51... Boss air outlet;

[0121] 60... Support member;

[0122] 70... Compressor;

[0123] 81... Valve;

[0124] 100A, 100B, 100C... Aircraft;

[0125] 101... Multi - fan;

[0126] 102... Wing;

[0127] Pb... Boss side flow path;

[0128] Pc... Cooling flow path;

[0129] Ph... Housing side flow path;

[0130] Ph0, Ph1, Ph2, Ph3... Flow path (housing side flow path);

[0131] Ps... Connecting flow path;

[0132] X... Axis of rotation.

Claims

1. A fan device, wherein, the fan device includes: a fan having a plurality of blades extending in a radial direction with respect to a rotation axis and generating an air flow by rotating around the rotation axis; a rotor core disposed outside the fan in the radial direction; a stator core disposed at a position facing the rotor core in the radial direction; a housing forming an inner peripheral surface surrounding the fan around the rotation axis and having an accommodation space formed therein for accommodating the rotor core and the stator core; and a compressor for compressing air, the inner peripheral surface having: a cylindrical surface; and a nozzle surface located downstream of the cylindrical surface in the flow direction of the air flow and having a diameter that expands outward in the radial direction along the rotation axis, the housing defining an internal cooling flow path and a housing-side flow path therein, the cooling flow path guiding compressed air from the compressor to the accommodation space, and the housing-side flow path guiding compressed air from the compressor to a boundary blowout port formed near the boundary between the cylindrical surface and the nozzle surface, the boundary blowout port facing a direction in which compressed air is blown out along the nozzle surface in the flow direction.

2. The fan device according to claim 1, wherein, the housing-side flow path guides compressed air to a trailing-edge blowout port formed at the trailing edge of the nozzle surface in the flow direction, the trailing-edge blowout port facing a direction in which compressed air is blown out in the flow direction.

3. The fan device according to claim 1 or 2, wherein, the fan device includes: a boss rotatably supporting the fan around the rotation axis; and a support member supporting the boss relative to the housing, the support member defining an internal communication flow path for guiding compressed air from the housing-side flow path to the boss side, the boss defining an internal boss-side flow path for guiding compressed air from the communication flow path to a boss blowout port formed at a downstream end surface in the flow direction, the boss blowout port facing a direction in which compressed air is blown out in the flow direction.

4. The fan device according to claim 1 or 2, wherein, the cooling flow path and the housing-side flow path are independent flow paths.

5. The fan device according to claim 1 or 2, wherein, the housing-side flow path communicates with the accommodation space.

6. The fan device according to claim 1 or 2, wherein, the housing is a duct.

7. The fan device according to claim 1 or 2, wherein, the housing is a wing of an aircraft.

8. An aircraft, wherein, the aircraft includes the fan device according to any one of claims 1 to 7.

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