Motor and duct blade integrated magnetic suspension fan and heat energy recovery method

Abstract

This invention relates to the field of fan technology for electric aircraft, and more particularly to a magnetic levitation fan integrating a motor and ducted blades, and a method for heat recovery. The magnetic levitation fan includes a drive system and a levitation control system. The drive system includes an electromagnetic coil for the fan blades and an electromagnetic drive coil, while the levitation control system includes a figure-eight coil. When current flows through, the impedance inside the coil generates heat, and eddy currents are formed on the metal surface of the electromagnetic coil, further generating heat. When the fan blades rotate, airflow enters the rotating duct from the middle of the fan blades and between adjacent fan bodies. The airflow is heated, and the pressure and temperature of the heated airflow increase. The airflow, accumulating heat, continues to expand and accelerates before being ejected from the outlet of the rotating duct. This invention eliminates the motor drive at the fan blade axis, effectively eliminating axial wind resistance. Furthermore, the heat generated during operation heats the airflow, allowing the airflow to expand and eject with internal energy, thus improving the fan's efficiency in working with the airflow.

Description

Technical Field

[0001] This invention relates to the field of fan technology for electric aircraft, and in particular to a magnetic levitation fan that integrates a motor and ducted blades and a method for heat recovery. Background Technology

[0002] Electrification of the propulsion system for electric aircraft is the best way to achieve energy conservation, emission reduction, and noise reduction in the aviation industry. Distributed electric propulsion systems are highly efficient propulsion systems for electric aircraft. As the most critical component of a distributed electric propulsion system, the efficient and iterative development of the electric fan is a significant constraint. Traditional fans require a motor to drive the fan blades, which becomes the "dead weight" during flight. Electric aircraft need to be equipped with more additional power to drive the motor, significantly reducing the effective payload and carrying capacity of the electric aircraft. At the same time, the noise and efficiency of traditional fans are also important factors restricting the development of electric aircraft. How to reduce fan dead weight while improving fan efficiency and reducing noise is a major challenge that needs to be overcome to promote the development of electric aircraft. Summary of the Invention

[0003] To reduce the "dead weight" of electric aircraft while improving fan efficiency and reducing noise, this invention provides a magnetic levitation fan that integrates the motor and ducted blades, as well as a heat recovery method.

[0004] The present invention is achieved through the following technical solution: a magnetic levitation fan that integrates the motor and the duct blades, including a drive system and a suspension control system;

[0005] The drive system includes a ring-shaped fan blade and a rotating duct. The fan body of the fan blade is twisted in the shape of a four-leaf clover. The upper part of one side of each fan body is tilted towards the direction of rotation. The other side of each fan body has an inclined part that matches the opposite side. The inclination of both sides of each fan body makes the fan body gradually taller from the center to the outermost side. The outermost vertical center line of all fan bodies is located in the same vertical ring plane. Four fan blade electromagnetic coils are arranged side by side in the horizontal direction inside the outer side of each fan body. The adjacent fan blade electromagnetic coils are equidistant from each other and the magnetic poles of the adjacent fan blade electromagnetic coils are different. The curvature of all fan blade electromagnetic coils matches the outer part of the fan body. There is a ring-shaped transition part at the junction of adjacent fan bodies that matches the side of the fan body.

[0006] The rotating duct has a cylindrical body that accommodates the fan blades. The two ends of the cylindrical body are respectively provided with an upper ring and a lower ring that are matched with the limiting parts of the fan blades. Multiple electromagnetic drive coils are arranged circumferentially inside the cylindrical body. The magnetic poles of adjacent electromagnetic drive coils are different. Adjacent electromagnetic drive coils are equidistant from each other. The width and height of each electromagnetic drive coil are adapted to the electromagnetic coil of the fan blade. The center line of the ring formed by all the electromagnetic drive coils is located on the axis of the cylindrical body.

[0007] The levitation control system includes multiple figure-eight coils. The magnetic rings of the figure-eight coils are spaced apart at their midpoints. Adjacent figure-eight coils are equidistant from each other. The centerline of the ring formed by all the figure-eight coils is located on the axis of the cylinder. The ring formed by all the figure-eight coils is located inside the ring formed by all the electromagnetic drive coils. There is a gap between the ring formed by all the figure-eight coils and the ring formed by all the electromagnetic drive coils.

[0008] As a further improvement to the technical solution of the present invention, the rotating duct also includes an air outlet section that is connected to the air outlet of the cylinder. The air outlet section is an expansion section, and the inner diameter of the air outlet section gradually increases from the air outlet of the cylinder to the air outlet of the air outlet section. The center line of the air outlet section is located on the axis of the cylinder.

[0009] As a further improvement to the technical solution of the present invention, the inner diameter of the air outlet section is not greater than the inner diameter of the lower ring.

[0010] As a further improvement to the technical solution of the present invention, the height of the figure-eight coil is adapted to the electromagnetic drive coil.

[0011] As a further improvement to the technical solution of the present invention, at least three fan connection lugs with mounting holes are provided outside the rotating duct.

[0012] The present invention further provides a method for heat recovery of a magnetic levitation fan that integrates the motor and the duct blades. When current passes through the electromagnetic coil, electromagnetic drive coil and figure-eight coil of the fan blade, the impedance inside the coil generates heat and eddy currents are formed on the surface of the coil, which in turn also generate heat. When the fan blades rotate, the airflow enters the rotating duct from the middle of the fan blades and between adjacent fan bodies. The airflow is heated and the pressure and temperature of the heated airflow increase. The airflow that has accumulated heat continues to expand and accelerates and is ejected towards the air outlet of the rotating duct.

[0013] The magnetic levitation fan and heat recovery method integrating the motor and duct blades described in this invention have the following advantages compared with the prior art:

[0014] 1. Simplified structure. The integration of the motor and duct eliminates the traditional method of using a motor to drive the fan blades, simplifying the assembly process, eliminating mechanical wear, and extending service life;

[0015] 2. Significantly reduces noise impact. The special fan blade duct structure enables the magnetic levitation fan, which integrates the motor and duct blades into one unit, to rotate quietly, reducing noise impact;

[0016] 3. Axis-based wind resistance elimination. The fan blade shaft is not driven by a motor; the hollow structure that replaces the motor effectively eliminates axial wind resistance.

[0017] 4. Recovering heat loss. The heat generated during operation can heat the airflow, allowing the airflow to expand and be ejected with a large amount of internal energy, thus improving the fan's efficiency in working with the airflow;

[0018] 5. High efficiency. The efficiency of the fan of this invention in one revolution is higher than that of a fan driven by a traditional motor. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of the magnetic levitation fan that integrates the motor and duct blades as described in this invention.

[0022] Figure 2 This is an isometric side view of the magnetic levitation fan that integrates the motor and duct blades as described in this invention.

[0023] Figure 3 This is a side view of the magnetic levitation fan that integrates the motor and duct blades as described in this invention.

[0024] Figure 4 This is a front view of the fan blade described in this invention.

[0025] Figure 5 This is a side view of the fan blade described in this invention.

[0026] Figure 6 This is an isometric side view of the fan blade described in this invention.

[0027] Figure 7 This is a schematic diagram of the installation of the fan blade metal coil described in this invention.

[0028] Figure 8 This is a schematic diagram of the structure of the electromagnetic drive coil described in this invention.

[0029] Figure 9 This is a schematic diagram showing the arrangement of the fan blades and the electromagnetic drive coil of the present invention.

[0030] Figure 10 for Figure 9 Side view.

[0031] Figure 11 This is a schematic diagram of the figure-eight coil described in this invention.

[0032] Figure 12 This is a schematic diagram of the cooperation between the figure-eight coil and the electromagnetic drive coil described in this invention.

[0033] Figure 13 This is a schematic diagram showing the interaction between the fan blades, the electromagnetic drive coil, and the figure-eight coil of the present invention.

[0034] Figure 14 This is a schematic diagram of the electromagnetic drive principle of the present invention.

[0035] Figure 15 This is a schematic diagram showing the magnetic flux of the upper and lower magnetic rings of the figure-eight coil of the present invention.

[0036] Figure 16 This is a schematic diagram illustrating the principle of current direction formation by the figure-eight coil of the present invention.

[0037] Figure 17 This is a schematic diagram of the airflow of the magnetic levitation fan that integrates the motor and duct blades as described in this invention.

[0038] In the diagram: 1. Fan blade; 101. Fan body; 102. Fan blade electromagnetic coil; 102-1. First fan blade electromagnetic coil; 102-2. Second fan blade electromagnetic coil; 102-3. Third fan blade electromagnetic coil; 102-4. Fourth fan blade electromagnetic coil; 2. Rotating duct; 201. Cylinder body; 202. Upper ring; 203. Lower ring; 204. Electromagnetic drive coil; 204-1. First electromagnetic drive coil; 204-2. Second electromagnetic drive coil; 204-3. Electromagnetic drive coil; 204-4. Electromagnetic drive coil; 205. Air outlet section; 206. Fan connecting lug; 301. Figure-8 coil. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0041] The specific embodiments of the present invention will be described in detail below.

[0042] like Figures 1 to 17 As shown, the present invention provides a specific embodiment of a magnetic levitation fan that integrates a motor and duct blades, including a drive system and a levitation control system.

[0043] The drive system includes a ring-shaped fan blade 1 and a rotating duct 2; the fan body 101 of the fan blade 1 is twisted in a four-leaf clover shape, with the upper left side of each part of the fan body 101 tilted towards the direction of rotation (towards...). Figure 5 Taking the direction as an example), each fan body 101 has an inclined portion on the right side that matches the opposite side, and the inclination of both sides of each fan body 101 makes the fan body 101 gradually taller from the center to the outermost side. The outermost vertical center lines of all fan bodies 101 are located in the same vertical annular plane. Four fan blade electromagnetic coils 102 are arranged side by side in the horizontal direction inside the outer side of each fan body 101. Adjacent fan blade electromagnetic coils 102 are equidistant from each other, and the magnetic poles of adjacent fan blade electromagnetic coils 102 are different. The curvature of all fan blade electromagnetic coils 102 matches the outer part of the fan body 101. At the junction of adjacent fan bodies 101, there is a ribbon-like transition portion that matches the side of the fan body 101 (in the shape of a ribbon arc, such as...). Figure 4 (As shown).

[0044] The rotating duct 2 has a cylindrical body 201 that accommodates and cooperates with the fan blade 1. The cylindrical body 201 has an upper ring portion 202 and a lower ring portion 203 arranged circumferentially at both ends to limit and cooperate with the fan blade 1. In this embodiment, the upper ring portion 202 and the lower ring portion 203 are to prevent the fan blade 1 from flying out of the cylindrical body 201. Preferably, to avoid excessive deflection of the fan blade 1 within the cylindrical body 201, when the fan blade 1 is located in the middle of the cylindrical body 201, the distance between the outer side of the fan body 101 and the cylindrical body 201 is no greater than three times the thickness of the fan body 101.

[0045] Multiple electromagnetic drive coils 204 are arranged circumferentially inside the cylinder 201. The magnetic poles of adjacent electromagnetic drive coils 204 are different. Adjacent electromagnetic drive coils 204 are equidistant from each other. The width and height of each electromagnetic drive coil 204 are adapted to the fan blade electromagnetic coil 102. The center line of the ring formed by all electromagnetic drive coils 204 is located on the axis of the cylinder 201.

[0046] The suspension control system includes multiple figure-eight coils 301. The magnetic rings of the figure-eight coils 301 are spaced apart at their midpoints. Adjacent figure-eight coils 301 are equidistant from each other. The center line of the ring formed by all the figure-eight coils 301 is located on the axis of the cylinder 201. The ring formed by all the figure-eight coils 301 is located inside the ring formed by all the electromagnetic drive coils 204. There is a gap between the ring formed by all the figure-eight coils 301 and the ring formed by all the electromagnetic drive coils 204.

[0047] In one embodiment of the present invention, the fan blade electromagnetic coil 102 is located inside the fan body 101, and the electromagnetic drive coil 204 and the figure-eight coil 301 are both located inside the cylindrical body 201. Furthermore, in this embodiment, both the fan body 101 and the cylindrical body 201 are made of insulating material.

[0048] In this embodiment, the fan blade 1 is equipped with multiple power supplies for powering the fan blade electromagnetic coil 102. These power supplies are evenly distributed on the fan blade 1. In this embodiment, the polarity of the fan blade electromagnetic coil 102 remains fixed, and the figure-eight coil 301 is not connected to a power source. In practical use, the polarity of the electromagnetic drive coil 204 is continuously switched by changing the current direction. Utilizing the polarity change of the electromagnetic drive coil 204 opposite to the fan blade electromagnetic coil 102, the... Figure 14 Taking the right-side fan body 101 as an example, when the fan blade 1 rotates clockwise, the first fan blade electromagnetic coil 102-1 is at the S pole, the second fan blade electromagnetic coil 102-2 is at the N pole, the third fan blade electromagnetic coil 102-3 is at the S pole, and the fourth fan blade electromagnetic coil 102-4 is at the N pole. The first electromagnetic drive coil 204-1 is at the N pole, the second electromagnetic drive coil 204-2 is at the S pole, the third electromagnetic drive coil 204-3 is at the N pole, and the fourth electromagnetic drive coil 204-4 is at the S pole. According to the principle that like poles repel and unlike poles attract, the force is applied to the second fan blade electromagnetic coil 102-2. For example, the fan body 101 is subjected to the repulsive force from the first electromagnetic drive coil 204-1 and the attractive force from the second electromagnetic drive coil 204-2. The direction of the resultant force at the second electromagnetic drive coil 102-2 is the direction of rotation of the fan blade 1. Therefore, the total resultant force on the fan body 101 is tangent to the rotation trajectory circle of the fan blade 1 and is consistent with the direction of rotation. At this time, the fan blade 1 rotates clockwise. When the fan body 101 rotates to the position where the magnetic poles cancel each other out, the current direction of the adjacent electromagnetic drive coil 204 changes, and the magnetic poles of the electromagnetic drive coil 204 also change accordingly, forming a resultant force that makes the fan blade 1 rotate again. This process is repeated continuously, and the fan blade 1 achieves continuous rotation.

[0049] like Figure 15 and 16As shown, after the fan blade 1 rotates within the cylinder 201, when the fan body 101 is located at the center of the figure-eight coil 301, the fan blade electromagnetic coil 102 on the fan body 101 generates magnetic flux. The changing magnetic flux generates an electric field on the coil. Due to the special structure of the figure-eight coil 301, the directions of the induced electromotive forces of the two connected upper and lower magnetic rings are the same. Simultaneously, since the fan blade is in the middle position, the induced electromotive forces of the upper and lower parts of the figure-eight coil 301 are also the same, so no current flows at this time. In this embodiment, the center lines of the rings formed by the electromagnetic drive coil 204 and the figure-eight coil 301 are both located on the axis of the cylinder 201. When the fan blade 1 rotates, its center of mass coincides with the axis of rotation, and its mass is uniformly distributed, achieving dynamic balance during normal rotation. The upper and lower magnetic rings of the figure-eight coil 301 are symmetrically arranged, as shown... Figure 11 As shown, in this embodiment, the upper and lower magnetic rings of the figure-eight coil 301 have a right-angle rounded corner structure at their bends. The upper and lower magnetic rings of the figure-eight coil 301 can also be set into other structures such as square, rhombus or triangle.

[0050] When fan blade 1 rotates below the figure-eight coil 301, the magnetic flux of the magnetic ring below the figure-eight coil 301 is higher than that of the magnetic ring above the figure-eight coil 301. The induced electromotive force is higher than that of the magnetic ring above the figure-eight coil 301. The potential difference causes current to flow, and the figure-eight coil 301 becomes an electromagnetic ring. The magnetic ring above the figure-eight coil 301 and the magnetic ring below the figure-eight coil 301 form two poles. The magnetic poles interact to generate an electromagnetic force that pushes fan blade 1 upward. When fan blade 1 moves upward, the induced current in the figure-eight coil 301 decreases due to the decrease in potential difference, and the electromagnetic force pushing fan blade 1 decreases accordingly. Finally, fan blade 1 will be stably located in the middle position of the figure-eight coil 301.

[0051] When fan blade 1 rotates above figure-eight coil 301, the magnetic flux of the magnetic ring above figure-eight coil 301 is higher than that of the magnetic ring below figure-eight coil 301, and the induced electromotive force is higher than that of the magnetic ring below figure-eight coil 301. The potential difference causes current to flow, and figure-eight coil 301 becomes an electromagnetic ring. The magnetic ring above figure-eight coil 301 and the magnetic ring below figure-eight coil 301 form two poles. The magnetic poles interact and generate an electromagnetic force that pushes fan blade 1 downward. When fan blade 1 moves downward, the induced current of figure-eight coil 301 decreases due to the decrease in potential difference, and the electromagnetic force pushing fan blade 1 decreases accordingly. Finally, fan blade 1 will be stably located in the middle position of figure-eight coil 301.

[0052] This embodiment also provides a heat recovery method for the magnetic levitation fan that integrates the motor and duct blades. Specifically, when current flows through the fan blade electromagnetic coil 102, electromagnetic drive coil 204, and figure-eight coil 301, the impedance inside the coil generates heat, and eddy currents are formed on the metal surface of the coil, thereby generating heat. When the fan blade 1 rotates, due to the adaptation of the fan body 101's tilt to the rotation direction in this embodiment, airflow enters from above the cylinder 201 (e.g., Figure 17 As shown), the intake process is completed. The airflow enters the rotating duct 2 from the middle of the fan blade 1 and between the adjacent fan body 101. The airflow is heated, and the pressure and temperature of the heated airflow increase. The airflow that has accumulated heat continues to expand and accelerates and is ejected towards the air outlet of the rotating duct 2.

[0053] In this embodiment, to facilitate airflow organization by the fan and to ensure the airflow is ejected from top to bottom, the rotating duct 2 further includes an air outlet section 205 that mates with the air outlet of the cylinder 201. The air outlet section 205 is an expansion section, and its inner diameter gradually increases from the air outlet of the cylinder 201 to the air outlet of the air outlet section 205. The centerline of the air outlet section 205 is located on the axis of the cylinder 201. In this embodiment, the air outlet section 205 promotes the continuous expansion of the energy-accumulated airflow, achieving accelerated ejection of the airflow.

[0054] like Figure 17 As shown, in order to facilitate the smoothness of the airflow acceleration and ejection, the inner diameter of the air outlet section 205 is not greater than the inner diameter of the lower ring 203.

[0055] Preferred, such as Figure 16 As shown, the height of the figure-eight coil 301 is adapted to the electromagnetic drive coil 204.

[0056] To facilitate the installation of the magnetic levitation fan in this embodiment, which integrates the motor and the duct blades, at least three fan connecting lugs 206 with mounting holes are provided on the outside of the rotating duct 2.

[0057] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A magnetic levitation fan that integrates the motor and ducted blades into one unit, characterized in that, Including the drive system and the suspension control system; The drive system includes a ring-shaped fan blade (1) and a rotating duct (2); the fan body (101) of the fan blade (1) is twisted in a four-leaf clover shape, with the upper part of one side of each fan body (101) tilted towards the direction of rotation, and the other side of each fan body (101) having an inclined part adapted to the opposite side, and the tilting of both sides of each fan body (101) makes the fan body (101) gradually become taller from the center to the outermost part, and the outermost vertical center line of all fan bodies (101) Located within the same vertical annular plane, each fan body (101) has four fan blade electromagnetic coils (102) arranged side by side in the horizontal direction on the outer side of its body. The adjacent fan blade electromagnetic coils (102) are equidistant from each other, and the magnetic poles of the adjacent fan blade electromagnetic coils (102) are different. The curvature of all fan blade electromagnetic coils (102) is adapted to the outer side of the fan body (101). The junction of adjacent fan bodies (101) has a ribbon-like transition part adapted to the side of the fan body (101). The rotating duct (2) has a cylindrical body (201) that accommodates and cooperates with the fan blade (1). The two ends of the cylindrical body (201) are respectively provided with an upper ring (202) and a lower ring (203) that cooperate with the fan blade (1) in a limiting manner. Multiple electromagnetic drive coils (204) are arranged in a circumferential manner inside the cylindrical body (201). The magnetic poles of adjacent electromagnetic drive coils (204) are different. Adjacent electromagnetic drive coils (204) are equidistant from each other. The width and height of each electromagnetic drive coil (204) are adapted to the electromagnetic coil (102) of the fan blade. The center line of the ring formed by all electromagnetic drive coils (204) is located on the axis of the cylindrical body (201). The suspension control system includes multiple figure-eight coils (301). The magnetic rings of the figure-eight coils (301) are spaced apart at their midpoints. Adjacent figure-eight coils (301) are equidistant from each other. The center line of the ring formed by all the figure-eight coils (301) is located on the axis of the cylinder (201). The ring formed by all the figure-eight coils (301) is located inside the ring formed by all the electromagnetic drive coils (204). There is a gap between the ring formed by all the figure-eight coils (301) and the ring formed by all the electromagnetic drive coils (204).

2. The magnetic levitation fan with the motor and duct blades integrated as described in claim 1, characterized in that, The rotating duct (2) also includes an air outlet section (205) that is connected to the air outlet of the cylinder (201). The air outlet section (205) is an expansion section, and the inner diameter of the air outlet section (205) gradually increases from the air outlet of the cylinder (201) to the air outlet of the air outlet section (205). The center line of the air outlet section (205) is located on the axis of the cylinder (201).

3. The magnetic levitation fan integrating the motor and duct blades as described in claim 2, characterized in that, The inner diameter of the air outlet section (205) is not greater than the inner diameter of the lower ring (203).

4. The magnetic levitation fan with the motor and duct blades integrated as described in claim 1, characterized in that, The height of the figure-eight coil (301) is adapted to the height of the electromagnetic drive coil (204).

5. The magnetic levitation fan with the motor and duct blades integrated as described in claim 1, characterized in that, The rotating duct (2) is provided with at least three fan connecting lugs (206) with mounting holes.

6. The heat recovery method of the magnetic levitation fan integrating the motor and duct blades as described in any one of claims 1 to 5, characterized in that, When current passes through the fan blade electromagnetic coil (102), electromagnetic drive coil (204) and figure-eight coil (301), the impedance inside the coil generates heat, and eddy currents are formed on the surface of the coil, which in turn also generate heat. When the fan blade (1) rotates, the airflow enters the rotating duct (2) from the middle of the fan blade (1) and between the adjacent fan body (101). The airflow is heated, and the pressure and temperature of the heated airflow increase. The airflow that has accumulated heat continues to expand and accelerates to be ejected from the outlet of the rotating duct (2).

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