Disc type cross-flow fan

Abstract

The utility model discloses a disc type cross-flow fan which comprises a first machine shell, a second machine shell, a first fan blade and a second fan blade, a first opening is formed in the side wall of one side of the first machine shell, a second opening is formed in the side wall of the other side of the first machine shell, a first flow channel space is formed in the middle of the first machine shell, and the first opening and the second opening are communicated with the first flow channel space; the second machine shell is connected to one side of the first machine shell, a third opening is formed in the side wall of one side of the second machine shell, a fourth opening is formed in the side wall of the other side of the second machine shell, a second flow channel space is formed in the middle of the second machine shell, the third opening, the fourth opening and the second flow channel space are communicated, and the fourth opening is close to and communicated with the second opening; the motor is connected to the first machine shell and the second machine shell, arranged at the second opening and the fourth opening and arranged between the first flow channel space and the second flow channel space. The first impeller is connected to the motor and arranged in the first flow channel space; the second impeller is connected to the motor and arranged in the second flow channel space; therefore, the technical problems that air outlet is not uniform, and the air outlet amount is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and more specifically, it is a disk cross-flow fan. Background Art

[0002] The cross-flow fan is also called a transverse-flow fan. The impeller is multi-bladed and long cylindrical, with forward multi-wing blades. When the impeller rotates, the air flow enters the blade grid from the open part of the impeller, passes through the inside of the impeller, and is discharged into the volute from the other blade grid, forming a working air flow. For example, the Chinese patent application number is 202021924666.3, and the patent theme name is a new type of metal cross-flow fan with an adjustable impeller. It has good shock absorption and elastic potential energy, avoids the collision between the two ends of the blade and the clamping disc during high-speed rotation, and improves the adjustability, protection and stability of the cross-flow fan.

[0003] However, in actual use, there are still some deficiencies: the motor 100 of the cross-flow fan is located on one side. When driving the impeller to rotate to form a working air flow, the air flow velocity is unstable inside the impeller, the air flow velocities at various points on the outer circumference of the impeller are inconsistent, and the air flow velocity and pressure at the air outlet are uneven, resulting in uneven air output and affecting the air volume and shaft power. Summary of the Utility Model

[0004] Aiming at the above deficiencies in the related art, the purpose is to provide a disk cross-flow fan to solve the technical problems of uneven air output and reduced air volume in the related art.

[0005] The technical solution to achieve the purpose is: a disk cross-flow fan, comprising:

[0006] A first housing, one side wall of the first housing has a first opening, the other side wall has a second opening, and there is a first flow channel space in the middle position. The first opening, the second opening and the first flow channel space are connected;

[0007] A second housing, connected to one side of the first housing. One side wall of the second housing has a third opening, the other side wall has a fourth opening, and there is a second flow channel space in the middle position. The third opening, the fourth opening and the second flow channel space are connected, and the fourth opening is close to and connected to the second opening;

[0008] A motor, connected to the first housing and the second housing, arranged at the second opening and the fourth opening, and arranged between the first flow channel space and the second flow channel space;

[0009] A first impeller, connected to the motor, arranged in the first flow channel space, one end aligned with the first opening, and spaced from the first housing;

[0010] and a second impeller, connected to the motor, disposed in the second flow channel space, with one end aligned with the third opening, spaced from the second housing, and symmetrically spaced from the first impeller.

[0011] Furthermore: The structures of the first housing and the second housing are the same, and both include: a first side wall plate having the first opening or the third opening;

[0012] a second side wall plate, spaced from the first side wall plate, having the second opening or the fourth opening;

[0013] a bending plate, connected between the first side wall plate and the second side wall plate, forming the first flow channel space or the second flow channel space between the first side wall plate and the second side wall plate;

[0014] and a flange port, connected to the first side wall plate, the second side wall plate and the bending plate, and away from the first opening or the third opening.

[0015] Furthermore: There is also an inner space between the two second side wall plates;

[0016] The inner space is disposed between the second opening and the fourth opening and is in communication with the second opening and the fourth opening;

[0017] The volume size of the inner space is larger than the volume size of the second opening or the fourth opening.

[0018] Furthermore: The motor includes: two disc motors, arranged back to back, connected at the inner space, with one end passing through the second opening and protruding into the first flow channel space, and the other end passing through the fourth opening and protruding into the second flow channel space;

[0019] a transmission shaft, passing through the middle position of the disc motor;

[0020] and several bearings, two in a group, symmetrically spaced between groups. The two bearings in one group are spaced and connected to the transmission shaft for connecting the first impeller or the second impeller.

[0021] Furthermore: The disc motor includes: a housing, connected at the inner space, with one end passing through the second opening or the fourth opening, and the middle position being penetrated by the transmission shaft; a stator, connected inside the housing and spaced from the transmission shaft; a winding, connected inside the housing and spaced from the transmission shaft; and a rotor, connected to the first impeller or the second impeller and spaced from the winding and the transmission shaft.

[0022] Furthermore, the length dimension of the transmission shaft is greater than the sum of the thickness dimensions of the two disc motors. One end of the transmission shaft is disposed in the first flow channel space, and the other end is disposed in the second flow channel space.

[0023] Furthermore, the number of the bearings is four, with two as a group. The groups are symmetrically spaced. One of the bearings in a group is connected to the transmission shaft, close to the disc motor, and the other bearing is connected to the transmission shaft, away from the disc motor, and is spaced from the first opening or the third opening.

[0024] Furthermore, the first impeller and the second impeller have the same structure, and both include: a first hub for connecting the rotor and the bearing; a second hub spaced from the first hub and spaced from the first opening or the third opening; and a plurality of blades evenly distributed between the first hub and the second hub.

[0025] Furthermore, the outer shape of the first hub is a stepped structure, with a groove and a stepped through hole on one side; the rotor is connected at the groove; and the stepped through hole is sleeved on the transmission shaft and connected to the bearing.

[0026] Furthermore, the second hub is a circular ring structure.

[0027] Furthermore, it further includes: two air guiding openings, one air guiding opening is connected at the first opening, and the other air guiding opening is connected at the third opening.

[0028] Adopting the above technical solution, the following beneficial effects are achieved: A disc cross-flow fan, compared with the related art, is provided with a first housing, a second housing, a motor, a first impeller and a second impeller; the first housing has a first opening, a second opening and a first flow channel space; the second housing has a third opening, a fourth opening and a second flow channel space; the motor is disposed at the second opening and the fourth opening, between the first flow channel space and the second flow channel space. When the motor operates, it drives the first impeller and the second impeller to rotate. The air flow enters from the first opening and the third opening, and then is discharged from the first flow channel space and the second flow channel space. Since the air flow enters from both sides and there is a motor blocking at the middle position, the range of air flow interference with each other is relatively small, realizing relatively uniform air outlet and improving the air output; thus overcoming the technical problems of uneven air outlet and reduced air output, achieving the technical effect of relatively uniform air outlet and increased air output, and having practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 One of the partial cross-sectional views of the general assembly;

[0030] Figure 2 Another partial cross-sectional view of the general assembly;

[0031] Figure 3 is a schematic diagram of the general assembly structure;

[0032] Figure 4 is a simulation vector diagram of the internal air flow velocity of a cross-flow fan in the prior art;

[0033] Figure 5 is a simulation effect diagram of the internal air flow of a cross-flow fan in the prior art;

[0034] Figure 6 is a simulation effect diagram of the internal air flow of a disk-type cross-flow fan;

[0035] Figure 7 is a schematic diagram of the structure of a cross-flow fan in the prior art;

[0036] In the figure: 10. First housing, 11. First opening, 12. Second opening, 13. First flow channel space, 20. Second housing, 21. Third opening, 22. Fourth opening, 23. Second flow channel space, 10-1. First side wall plate, 10-2. Second side wall plate, 10-3. Bending plate, 10-4. Flange opening, 10-21. Inner space, 30. Motor, 31. Disk motor, 31-1. Housing, 31-2. Stator, 31-3. Winding, 31-4. Rotor, 32. Transmission shaft, 33. Bearing, 40. First impeller, 41. First hub, 41-1. Groove, 41-2. Step through hole, 42. Second hub, 43. Blade, 50. Second impeller, 60. Air guide opening, 100. Electric motor, 200. Impeller, 300. Air outlet. Specific embodiments

[0037] In order to make the content easier to be clearly understood, the following further detailed description is made according to specific embodiments in conjunction with the accompanying drawings;

[0038] A disk-type cross-flow fan solves the technical problems of uneven air outlet and reduced air output in the related art, can be manufactured and used, and achieves the positive effects of relatively uniform air outlet and increased air output. The general idea is as follows:

[0039] One embodiment:

[0040] As Figure 1 、 Figure 2 、 Figure 3 shown; a disk-type cross-flow fan includes:

[0041] A first housing 10, one side wall of the first housing 10 has a first opening 11, the other side wall has a second opening 12, and a first flow channel space 13 is provided in the middle position. The first opening 11, the second opening 12 and the first flow channel space 13 are communicated;

[0042] A second housing 20 is connected to one side of the first housing 10. A third opening 21 is provided on one side wall of the second housing 20, a fourth opening 22 is provided on the other side wall, and a second flow channel space 23 is provided at the middle position. The third opening 21, the fourth opening 22 and the second flow channel space 23 are in communication, and the fourth opening 22 is in close communication with the second opening 12.

[0043] A motor 30 is connected to the first housing 10 and the second housing 20, is provided at the second opening 12 and the fourth opening 22, and is provided between the first flow channel space 13 and the second flow channel space 23.

[0044] A first impeller 40 is connected to the motor 30, is provided in the first flow channel space 13, has one end aligned with the first opening 11, and is spaced from the first housing 10.

[0045] And a second impeller 50 is connected to the motor 30, is provided in the second flow channel space 23, has one end aligned with the third opening 21, is spaced from the second housing 20, and is symmetrically spaced from the first impeller 40.

[0046] Specifically, in implementation, a first housing 10, a second housing 20, a motor 30, a first impeller 40 and a second impeller 50 are provided; the first housing 10 has a first opening 11, a second opening 12 and a first flow channel space 13; the second housing 20 has a third opening 21, a fourth opening 22 and a second flow channel space 23; the motor 30 is provided at the second opening 12 and the fourth opening 22, and is provided between the first flow channel space 13 and the second flow channel space 23. When the motor 30 operates, it drives the first impeller 40 and the second impeller 50 to rotate. Airflow enters from the first opening 11 and the third opening 21, and then is discharged from the first flow channel space 13 and the second flow channel space 23. Since the airflow enters from both sides and there is a blockage of the motor 30 at the middle position, the range of interference between the airflows is relatively small, achieving relatively uniform air output and increasing the air output volume.

[0047] Another implementation mode:

[0048] Such as Figure 1 、 Figure 2 、 Figure 3As shown; during implementation, the structures of the first housing 10 and the second housing 20 are the same, and both include: a first side wall plate 10-1, having the first opening 11 or the third opening 21; a second side wall plate 10-2, spaced apart from the first side wall plate 10-1, having the second opening 12 or the fourth opening 22; a bending plate 10-3, connected between the first side wall plate 10-1 and the second side wall plate 10-2, forming the first flow channel space 13 or the second flow channel space 23 between the first side wall plate 10-1 and the second side wall plate 10-2; and a flange port 10-4, connected to the first side wall plate 10-1, the second side wall plate 10-2 and the bending plate 10-3, away from the first opening 11 or the third opening 21.

[0049] The first side wall plate 10-1, the second side wall plate 10-2 or the bending plate 10-3 are formed by stamping metal thin plates, and then welded together, with relatively light self-weight; the flange port 10-4 is welded to the first side wall plate 10-1, the second side wall plate 10-2 and the bending plate 10-3, and the two flange ports 10-4 are combined into a rectangular flange;

[0050] Or the materials of the first side wall plate 10-1, the second side wall plate 10-2, the bending plate 10-3 and the flange port 10-4 are plastics and are integrally injection molded;

[0051] Or the materials of the first side wall plate 10-1, the second side wall plate 10-2, the bending plate 10-3 and the flange port 10-4 are aluminum alloy and are integrally cast;

[0052] The first opening 11 and the third opening 21 are provided, which are circular through holes, facilitating the entry of air flow and facilitating the connection of the air guide port 60;

[0053] The inner diameter size of the first opening 11 or the third opening 21 is larger than the outer diameter size of the first impeller 40 or the second impeller 50, which is beneficial to the installation of the first impeller 40 into the first flow channel space 13 and the installation of the second impeller 50 into the second flow channel space 23, and the assembly is relatively convenient;

[0054] The second opening 12 and the fourth opening 22 are provided, which are in a "U" shape structure, facilitating the installation of the motor 30;

[0055] The first flow channel space 13 and the second flow channel space 23 are provided, forming an air flow circulation space, effectively reducing the loss of air flow and improving the working efficiency;

[0056] There is also an inner space 10-21 between the two second side wall plates 10-2; the inner space 10-21 is arranged between the second opening 12 and the fourth opening 22 and is in communication with the second opening 12 and the fourth opening 22; the volume size of the inner space 10-21 is larger than the volume size of the second opening 12 or the fourth opening 22; the inner space 10-21 is provided with a "U" shape structure, which is beneficial to clamping and connecting the motor 30, and the motor 30 is reliably positioned. Since the motor 30 occupies the space at the second opening 12, the fourth opening 22 and the inner space 10-21, a blockage is formed, making the range of airflow interference relatively small, effectively reducing the loss of airflow and improving the working efficiency;

[0057] Another embodiment:

[0058] As Figure 1 、 Figure 2 、 Figure 3 shown; during implementation, the motor 30 includes: two disc motors 31, arranged back to back, connected at the inner space 10-21, one end passing through the second opening 12 and protruding into the first flow channel space 13, and the other end passing through the fourth opening 22 and protruding into the second flow channel space 23; a transmission shaft 32, passing through the middle position of the disc motor 31; and several bearings 33, two in a group, symmetrically spaced between groups. The two bearings 33 in one group are spaced and connected to the transmission shaft 32 for connecting the first impeller 40 or the second impeller 50;

[0059] The disc motor 31 includes: a housing 31-1, connected at the inner space 10-21, one end passing through the second opening 12 or the fourth opening 22, and the middle position being penetrated by the transmission shaft 32; a stator 31-2, connected inside the housing 31-1 and spaced from the transmission shaft 32; a winding 31-3, connected inside the housing 31-1 and spaced from the transmission shaft 32; and a rotor 31-4, connected to the first impeller 40 or the second impeller 50 and spaced from the winding 31-3 and the transmission shaft 32; the housing 31-1, the stator 31-2, the winding 31-3 and the rotor 31-4 are common structures in the prior art and are common knowledge. A person of ordinary skill in the art can directly and unambiguously know how to set them after seeing the disclosed content, without the need to pay creative labor or conduct excessive experiments;

[0060] The length dimension of the transmission shaft 32 is greater than the sum of the thickness dimensions of the two disc motors 31. One end of the transmission shaft 32 is arranged in the first flow channel space 13, and the other end is arranged in the second flow channel space 23; the transmission shaft 32 is fixedly connected with the disc motor 31. The control of the dimensions enables the transmission shaft 32 to extend into the first flow channel space 13 and the second flow channel space 23, which is beneficial to connecting with the first impeller 40 and the second impeller 50 through the bearing 33.

[0061] The number of the bearings 33 is four, with two as a group. The groups are symmetrically arranged at intervals. One of the bearings 33 in a group is connected to the transmission shaft 32, close to the disc motor 31, and the other bearing 33 is connected to the transmission shaft 32, far from the disc motor 31, and is arranged at an interval from the first opening 11 or the third opening 21; the bearing 33 is a common structure in the prior art, such as: a deep groove ball bearing, which is connected to the transmission shaft 32, is beneficial to connecting the first impeller 40 and the second impeller 50, and when the first impeller 40 and the second impeller 50 rotate, it is relatively smooth.

[0062] The motor 30 is provided, which occupies the space at the second opening 12, the fourth opening 22 and the inner space 10 - 21, forming an obstruction. The range of mutual interference of the airflows is relatively small, effectively reducing the loss of the airflows and improving the working efficiency.

[0063] Another embodiment:

[0064] Such as Figure 1 、 Figure 2 、 Figure 3 shown; during implementation, the structures of the first impeller 40 or the second impeller 50 are the same, and both include: a first hub 41, connecting the rotor 31 - 4 and the bearing 33; a second hub 42, arranged at an interval from the first hub 41 and at an interval from the first opening 11 or the third opening 21; and a plurality of blades 43, evenly distributed between the first hub 41 and the second hub 42.

[0065] The outer shape of the first hub 41 is a stepped structure, with a groove 41 - 1 and a stepped through - hole 41 - 2 on one side; the groove 41 - 1 is connected to the rotor 31 - 4; the stepped through - hole 41 - 2 is sleeved on the transmission shaft 32 and connected to the bearing 33; the second hub 42 is a circular ring structure; the blade 43 is a strip - shaped structure.

[0066] When the material of the first impeller 40 or the second impeller 50 is aluminum alloy, the first hub 41, the second hub 42 and the blade 43 are welded and combined.

[0067] When the material of the first impeller 40 or the second impeller 50 is engineering plastic, the first hub 41, the second hub 42 and the blades 43 are integrally injection molded;

[0068] A groove 41-1 is provided, which is beneficial for clamping and connecting to the rotor 31-4. When the motor 30 operates, the rotor 31-4 rotates, thereby driving the first impeller 40 and the second impeller 50 to rotate;

[0069] A stepped through-hole 41-2 is provided, which is beneficial for sleeving on the transmission shaft 32 and connecting to the bearing 33, and the assembly is relatively convenient;

[0070] Another embodiment:

[0071] Such as Figure 1 , Figure 2 , Figure 3 shown; during implementation, it further includes: two air guide openings 60, one air guide opening 60 is connected to the first opening 11, and the other air guide opening 60 is connected to the third opening 21;

[0072] The air guide opening 60 is connected to the first housing 10 or the second housing 20 through bolt parts, forming a guide, which is beneficial for the air flow to smoothly enter the first flow channel space 13 and the second flow channel space 23;

[0073] Simulation comparison between the cross-flow fan in the prior art and the disk cross-flow fan of the present invention:

[0074] The simulation conditions are as follows: for the cross-flow fan in the prior art, the rotational speed of the motor 100 is 3000 r / min, the diameter of the impeller 200 is 190 mm, and the length of the impeller 200 is 139 mm;

[0075] For the disk cross-flow fan of the present invention, the rotational speed of the motor 30 is 3000 r / min, the diameter of the first impeller 40 or the second impeller 50 is 190 mm, and the length of the first impeller 40 or the second impeller 50 is 139 mm;

[0076] Such as Figure 4 , Figure 5 , Figure 7 shown, in the prior art, the motor 100 of the cross-flow fan is located on one side (right side). When driving the impeller 200 to rotate to form a working air flow, due to the obstruction of the motor 100, the air flow on the right side can only enter from the upper and lower ends, resulting in uneven distribution of the internal air flow velocity. There is a blank area (such as the left side in Figure 4 ), resulting in uneven distribution of the air flow velocity at the air outlet 300. The air flow velocities at different positions of the same air outlet 300 vary greatly, and the air volume on the right side of the air outlet 300 is significantly smaller than the air volume on the left side of the air outlet 300, resulting in uneven air output and affecting the air volume and shaft power;

[0077] As Figure 6 shown, since the motor 30 is located between the first flow channel space 13 and the second flow channel space 23 and is in the middle position, the air flow velocity distributions on the left and right sides are basically the same, and the air outlet is more uniform;

[0078] The air volume of the cross-flow fan in the prior art is 2798 cubic meters, and the air volume of the disk type cross-flow fan of the present invention is 3441 cubic meters, with the air volume increased by 22.98%;

[0079] Moreover, with the increase in the air volume, the shaft power is increased from 1.53 kilowatts of the cross-flow fan in the prior art to 1.87 kilowatts of the disk type cross-flow fan of the present invention, with the shaft power increased by 22.22%;

[0080] The working principle is as follows: The motor 30 operates to drive the first impeller 40 and the second impeller 50 to rotate. The air flow enters from the first opening 11 and the third opening 21, and then is discharged from the first flow channel space 13 and the second flow channel space 23. Since the air flow enters from both sides and there is a blockage of the motor 30 at the middle position, the range of mutual interference of the air flow is relatively small, realizing relatively uniform air outlet and increasing the air volume;

[0081] In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship are based on the position relationship described in the drawings, and are only for the convenience of description or simplification of the description, rather than indicating a specific orientation that must be had; The operation process described in the embodiment is not an absolute use step, and corresponding adjustments can be made during actual use;

[0082] Unless otherwise defined individually, the technical terms or scientific terms used herein should be of the ordinary meaning understood by those with ordinary skills in the art; The "first", "second" and similar words used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not determine the quantity limit either, but indicate the existence of at least one, and it needs to be determined according to the content of the embodiment;

[0083] The above is only a preferred specific implementation manner, but the protection scope is not limited thereto. Any person skilled in the art within the disclosed technical scope, according to the technical solution and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope.

Claims

1. A disc-type crossflow fan, characterized in that: include: A first housing (10), wherein the first housing (10) has a first opening (11) on one side wall, a second opening (12) on the other side wall, and a first flow channel space (13) in the middle, and the first opening (11), the second opening (12) and the first flow channel space (13) are connected; A second housing (20) is connected to one side of the first housing (10); a third opening (21) is provided on one side wall of the second housing (20); a fourth opening (22) is provided on the other side wall of the second housing (20); a second flow channel space (23) is provided in the middle; the third opening (21), the fourth opening (22) and the second flow channel space (23) are connected to each other, and the fourth opening (22) is closely connected to the second opening (12); a motor (30) connected to the first housing (10) and the second housing (20), disposed at the second opening (12) and the fourth opening (22), and disposed between the first flow channel space (13) and the second flow channel space (23); A first impeller (40) connected to the motor (30), disposed in the first flow channel space (13), with one end aligned with the first opening (11), and spaced apart from the first casing (10); and a second impeller (50) connected to the motor (30), arranged in the second flow channel space (23), with one end aligned with the third opening (21), spaced apart from the second casing (20), and symmetrically spaced apart from the first impeller (40).

2. A disc-type crossflow fan according to claim 1, characterized in that: The first housing (10) and the second housing (20) have the same structure, and both comprise: a first side wall plate (10-1) having the first opening (11) or the third opening (21); A second side wall plate (10-2), spaced apart from the first side wall plate (10-1), having the second opening (12) or the fourth opening (22); a bending plate (10-3), connected between the first side wall plate (10-1) and the second side wall plate (10-2), and forming the first flow channel space (13) or the second flow channel space (23) between the first side wall plate (10-1) and the second side wall plate (10-2); and a flange opening (10-4), connected to the first side wall plate (10-1), the second side wall plate (10-2) and the bent plate (10-3), and away from the first opening (11) or the third opening (21).

3. A disc-type crossflow fan according to claim 2, characterized in that: An inner space (10-21) is also provided between the two second side wall plates (10-2); The inner space (10-21) is arranged between the second opening (12) and the fourth opening (22), and is in communication with the second opening (12) and the fourth opening (22); The volume size of the inner space (10-21) is greater than the volume size of the second opening (12) or the fourth opening (22).

4. A disc-type crossflow fan according to claim 3, characterized in that: The motor (30) comprises: two disc-type motors (31), which are arranged back to back and connected at the inner space (10-21), one end of which passes through the second opening (12) and protrudes into the first flow channel space (13), and the other end of which passes through the fourth opening (22) and protrudes into the second flow channel space (23); A transmission shaft (32) passes through the middle of the disc motor (31); and a plurality of bearings (33), two in a group, symmetrically spaced between the groups, the two bearings (33) in a group being spaced apart and connected to the transmission shaft (32) for connecting the first impeller (40) or the second impeller (50).

5. A disc-type crossflow fan according to claim 4, characterized in that: The disc motor (31) comprises: a housing (31-1) connected to the inner space (10-21), one end of which passes through the second opening (12) or the fourth opening (22), and the middle position of which is penetrated by the transmission shaft (32); a stator (31-2) connected to the housing (31-1) and spaced apart from the transmission shaft (32); a winding (31-3) connected to the housing (31-1) and spaced apart from the transmission shaft (32); and a rotor (31-4) connected to the first impeller (40) or the second impeller (50), and spaced apart from the winding (31-3) and the transmission shaft (32).

6. A disc-type crossflow fan according to claim 4, characterized in that: The length of the transmission shaft (32) is greater than the sum of the thicknesses of the two disc motors (31); one end of the transmission shaft (32) is arranged in the first flow channel space (13), and the other end is arranged in the second flow channel space (23).

7. A disc-type crossflow fan according to claim 6, characterized in that: The number of the bearings (33) is four, two in a group, and the groups are symmetrically spaced apart. One bearing (33) in a group is connected to the transmission shaft (32) and is close to the disc motor (31), and the other bearing (33) is connected to the transmission shaft (32) and is far away from the disc motor (31) and is spaced apart from the first opening (11) or the third opening (21).

8. The disc-type crossflow fan according to claim 5, characterized in that: The first impeller (40) or the second impeller (50) has the same structure, and both comprise: a first hub (41) connected to the rotor (31-4) and the bearing (33); a second hub (42) spaced apart from the first hub (41) and spaced apart from the first opening (11) or the third opening (21); and a plurality of blades (43) evenly distributed between the first hub (41) and the second hub (42).

9. A disc-type crossflow fan according to claim 8, characterized in that: The first hub (41) has a stepped structure and has a groove (41-1) and a stepped through hole (41-2) on one side; the groove (41-1) is connected to the rotor (31-4); the stepped through hole (41-2) is sleeved on the transmission shaft (32) and connected to the bearing (33).

10. A disc-type crossflow fan according to claim 9, characterized in that: The second hub (42) is a circular ring structure.

11. A disc-type crossflow fan according to claim 1 or 5 or 7 or 10, characterized in that: Also includes: Two air guide ports (60), one of the air guide ports (60) is connected to the first opening (11), and the other of the air guide ports (60) is connected to the third opening (21).

Images