Axial flow fan driven by permanent magnet synchronous motor

Abstract

According to the axial flow fan driven by the permanent magnet synchronous motor, a motor drives a supporting piece to rotate, a plurality of impeller pieces can be synchronously driven to rotate around the axis of the supporting piece when the supporting piece rotates, so that air on one side of a shell is driven to flow to the other side of the shell, and then a driving piece is started to drive an adjusting assembly to move; when the adjusting assembly moves, each impeller piece can be synchronously driven to rotate by a certain angle relative to the supporting piece, and then different air thrust is generated when the supporting piece drives the multiple impeller pieces to rotate; the length of the impeller parts can be adjusted in real time so that the area of a circular face formed by rotation of the multiple impeller parts can be close to the area of the cross section of the cylindrical hollow channel in the shell, and turbulent flow is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to an axial flow fan driven by a permanent magnet synchronous motor. Background Art

[0002] Axial flow fans, with their wide range of uses, are fans in which the airflow is directed in the same direction as the blade axis. Examples include electric fans and air conditioner outdoor fans. They are called "axial flow" because the air flows parallel to the fan's axis. Axial flow fans are typically used in applications requiring high flow rates but low pressure. Axial flow fans are fixed in position but move air.

[0003] At present, when a variable-blade axial flow fan is in use, there is a certain gap between the working surface where the fan blades are located and the inner wall of the fan casing, which will cause turbulence caused by the moving air hitting the inner wall, reducing the overall efficiency of the variable-blade axial flow fan in pushing air. Utility Model Content

[0004] Based on this, it is necessary to provide an axial flow fan driven by a permanent magnet synchronous motor to address the problem that when a traditional variable-blade axial flow fan is in use, there is a certain gap between the working surface where the fan blades are located and the inner wall of the fan casing, which will cause turbulence caused by the moving air hitting the inner wall, thereby reducing the overall efficiency of the variable-blade axial flow fan in pushing air.

[0005] The present application provides an axial flow fan driven by a permanent magnet synchronous motor, comprising:

[0006] The outer shell is configured to be cylindrical with a hollow interior;

[0007] A motor is disposed inside the housing and is fixedly connected to the inner wall of the housing via a plurality of connecting rods;

[0008] A support member, which is cylindrical and fixedly connected to the motor;

[0009] impeller members, provided in a plurality, each of the impeller members being disposed inside the housing, the plurality of impeller members being equidistantly arranged along the circumference of the support member, and each of the impeller members being rotatably connected to the support member;

[0010] an adjusting assembly slidably disposed on the support member, and each of the impeller members is rotatably connected to the adjusting assembly;

[0011] The driving member is arranged on the supporting member, the driving member is fixedly connected to the supporting member, and the driving member is also fixedly connected to the adjusting assembly.

[0012] The present application relates to an axial flow fan driven by a permanent magnet synchronous motor, in which a support member is driven to rotate by the motor, and when the support member rotates, multiple impeller members are synchronously driven to rotate around the axis of the support member, so that the air on one side of the outer shell is driven to flow to the other side of the outer shell, and then the driving member is started to drive the adjustment component to move. When the adjustment component moves, each impeller member is synchronously driven to rotate a certain angle relative to the support member, so that different air thrusts are generated when the support member drives the multiple impeller members to rotate; the length of the impeller member can be adjusted so that the circular surface area formed by the rotation of the multiple impeller members is close to the cross-sectional area of the cylindrical hollow channel inside the outer shell, thereby reducing the presence of turbulence. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of an axial flow fan driven by a permanent magnet synchronous motor provided in one embodiment of the present application.

[0014] Figure 2 A schematic diagram of the positional relationship between a driving member and a supporting member in an axial flow fan driven by a permanent magnet synchronous motor provided in one embodiment of the present application.

[0015] Figure 3 A schematic diagram of the positional relationship between the motor and the connecting rod in an axial flow fan driven by a permanent magnet synchronous motor provided in one embodiment of the present application.

[0016] Figure 4 A schematic diagram of the positional relationship between the first blade and the second blade in an axial flow fan driven by a permanent magnet synchronous motor provided in one embodiment of the present application.

[0017] Figure 5 This is a schematic diagram of the position relationship between the first limiting block and the first limiting groove in an axial flow fan driven by a permanent magnet synchronous motor provided in one embodiment of the present application.

[0018] Reference numerals:

[0019] 11. Housing; 12. Motor; 13. Support member; 131. First limiting groove; 132. Second limiting groove;

[0020] 14. Impeller; 141. Support shaft; 142. First blade; 143. Second blade;

[0021] 143a, positioning hole; 144, locking bolt; 15, adjustment assembly; 151, follower;

[0022] 151a, driven ring; 151b, first limit block; 151c, second limit block; 152, adapter plate;

[0023] 16. Driving member; 161. Cylinder; 162. Support rod; 17. Connecting rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0025] like Figures 1 to 3 As shown, in one embodiment of the present application, the axial flow fan driven by the permanent magnet synchronous motor 12 includes a housing 11 , a motor 12 , a support member 13 , an impeller member 14 , an adjustment assembly 15 and a driving member 16 .

[0026] The housing 11 is configured to be cylindrical with a hollow interior.

[0027] The motor 12 is disposed inside the housing 11 and is fixedly connected to the inner wall of the housing 11 via a plurality of connecting rods 17 .

[0028] The support member 13 is cylindrical and fixedly connected to the motor 12 .

[0029] The impeller members 14 are provided in a plurality. Each of the impeller members 14 is disposed inside the housing 11. The impeller members 14 are arranged equidistantly along the circumference of the support member 13. Each of the impeller members 14 is rotatably connected to the support member 13.

[0030] The adjusting assembly 15 is slidably disposed on the supporting member 13 . Each of the impeller members 14 is rotatably connected to the adjusting assembly 15 .

[0031] The driving member 16 is disposed on the supporting member 13. The driving member 16 is fixedly connected to the supporting member 13. The driving member 16 is also fixedly connected to the adjusting assembly 15.

[0032] Specifically, a cylindrical hollow channel is provided inside the shell 11, and the axis of the output shaft of the motor 12 is collinear with the axis of the cylindrical hollow channel; the adjustment component 15 can slide back and forth along the axial direction of the support member 13, and the adjustment component 15 is driven by the driving member 16 to slide along the support member 13; the motor 12 can be a permanent magnet synchronous motor.

[0033] In this embodiment, the support member 13 is driven to rotate by the motor 12. When the support member 13 rotates, the multiple impeller members 14 are also synchronously driven to rotate around the axis of the support member 13, so that the air on one side of the outer shell 11 is driven to flow to the other side of the outer shell 11. Then, the driving member 16 is started to drive the adjustment component 15 to move. When the adjustment component 15 moves, each impeller member 14 is also synchronously driven to rotate a certain angle relative to the support member 13, so that different air thrusts are generated when the support member 13 drives the multiple impeller members 14 to rotate; the length of the impeller member 14 can be adjusted so that the circular surface area formed by the rotation of the multiple impeller members 14 is close to the cross-sectional area of the cylindrical hollow channel inside the outer shell 11, thereby reducing the existence of turbulence.

[0034] like Figure 4 As shown, in one embodiment of the present application, the impeller member 14 includes a support shaft 141 , a first fan blade 142 , a second fan blade 143 and a locking bolt 144 .

[0035] The support shaft 141 is disposed on the support member 13. The support shaft 141 is rotatably connected to the support member 13.

[0036] The first fan blade 142 is disposed inside the housing 11 and is fixedly connected to the support shaft 141 .

[0037] The second blade 143 is disposed inside the housing 11. The second blade 143 is also disposed on a side of the first blade 142 away from the support shaft 141. The second blade 143 is inserted into the first blade 142.

[0038] The locking bolt 144 is threadedly connected to the first fan blade 142. One end of the locking bolt 144 passes through the first fan blade 142 and then is inserted into the second fan blade 143.

[0039] Specifically, a first positioning groove is provided on the side of the first fan blade 142 away from the support shaft 141, the second fan blade 143 is inserted into the first positioning groove, and the second fan blade 143 is slidingly connected to the first positioning groove; a first threaded hole is also provided on the side of the first fan blade 142 away from the support shaft 141, the first threaded hole is connected to the first positioning groove, and the locking bolt 144 is threadedly connected to the first threaded hole, and the locking bolt 144 passes through the first threaded hole.

[0040] In this embodiment, the locking bolt 144 is disengaged from the second fan blade 143 by rotating the locking bolt 144, and then the second fan blade 143 is moved to adjust the depth of the second fan blade 143 inserted into the first fan blade 142, and then the locking bolt 144 is rotated again to insert the locking bolt 144 into the second fan blade 143 again, thereby fixing the position of the second fan blade 143 relative to the first fan blade 142.

[0041] like Figure 4 As shown, in one embodiment of the present application, a plurality of positioning holes 143a are formed on the second blade 143. The plurality of positioning holes 143a are equidistantly arranged along the sliding direction of the first blade 142 relative to the second blade 143. The locking bolt 144 is inserted into one of the positioning holes 143a.

[0042] In this embodiment, each time the second blade 143 moves a certain distance relative to the first blade 142 , a positioning hole 143 a will correspond to the first threaded hole, so that the locking bolt 144 can be inserted into a positioning hole 143 a .

[0043] like Figure 4 As shown, in one embodiment of the present application, the adjustment assembly 15 includes a follower 151 and an adapter plate 152 .

[0044] The driven member 151 is configured to be arc-shaped and is slidably sleeved on the supporting member 13 .

[0045] The adapter plates 152 are provided in a plurality. The number of the adapter plates 152 is the same as the number of the first blades 142. One end of each adapter plate 152 is rotatably connected to one of the first blades 142. The other end of each adapter plate 152 is rotatably connected to the follower 151.

[0046] Specifically, the position where each adapter plate 152 is rotatably connected to a first blade 142 is the same, and the inclination angle of each adapter plate 152 is the same.

[0047] In this embodiment, the follower 151 moves along the support 13 to drive the multiple adapter plates 152 to rotate synchronously at the same angle, so that each adapter plate 152 synchronously drives a first fan blade 142 to rotate at the same angle.

[0048] like Figure 4 As shown, in one embodiment of the present application, the plurality of adapter plates 152 are arranged equidistantly along the circumferential direction of the follower 151 .

[0049] like Figure 5 As shown, in one embodiment of the present application, the follower 151 includes a follower ring 151a, a first limiting block 151b and a second limiting block 151c.

[0050] The driven ring 151 a is slidably mounted on the support member 13 .

[0051] The first limit block 151b is disposed on one side of the support member 13. The first limit block 151b is fixedly connected to the driven ring 151a. The first limit block 151b is inserted into the support member 13. The first limit block 151b is slidably connected to the support member 13.

[0052] The second limit block 151c is disposed on the other side of the support member 13. The second limit block 151c is fixedly connected to the driven ring 151a. The second limit block 151c is inserted into the support member 13. The second limit block 151c is slidably connected to the support member 13.

[0053] Specifically, the structure of the first limiting block 151b is the same as that of the second limiting block 151c. The first limiting block 151b is arranged on one side of the driven ring 151a, and the second limiting block 151c is arranged on the other side of the driven ring 151a.

[0054] In this embodiment, the first limit block 151b limits the moving direction of one side of the driven ring 151a, and the second limit block 151c limits the moving direction of the other side of the driven ring 151a, further making the sliding of the driven ring 151a on the support member 13 more stable.

[0055] like Figure 5 As shown, in one embodiment of the present application, the support member 13 is provided with a first limiting groove 131 and a second limiting groove 132. The first limiting groove 131 is provided on one side of the support member 13, and the second limiting groove 132 is provided on the other side of the support member 13.

[0056] like Figure 5 As shown, in one embodiment of the present application, the structure of the first limiting groove 131 is the same as that of the second limiting groove 132. The first limiting groove 131 and the second limiting groove 132 are arranged parallel to each other. The first limiting block 151b is parallel to the axis of the support member 13 along the sliding direction of the first limiting groove 131.

[0057] Specifically, the length of the first limiting groove 131 is the same as that of the second limiting groove 132 , and the cross-sectional shape of the first limiting groove 131 is the same as that of the first limiting block 151 b .

[0058] like Figure 5 As shown, in one embodiment of the present application, the first limiting block 151b is slidably connected to the first limiting groove 131 , and the second limiting block 151c is slidably connected to the second limiting groove 132 .

[0059] like Figure 5 As shown, in one embodiment of the present application, the driving member 16 includes a cylinder 161 and a support rod 162 .

[0060] The cylinder 161 is disposed on the support member 13 . The cylinder 161 is disposed near the first limiting groove 131 .

[0061] The support rod 162 is disposed in the first limiting groove 131. One end of the support rod 162 is inserted into the cylinder 161. The other end of the support rod 162 is fixedly connected to the first limiting block 151b.

[0062] Specifically, the cylinder 161 is disposed on a side of the first limiting slot 131 away from the motor 12 , and the support rod 162 is disposed on a side of the first limiting slot 131 away from the motor 12 .

[0063] In this embodiment, by starting the cylinder 161 to drive the support rod 162 to extend or retract, the further extension or retraction of the support rod 162 will synchronously drive the first limit block 151b to slide back and forth in the first limit groove 131, and further the first limit block 151b sliding back and forth in the first limit groove 131 will synchronously drive the driven ring 151a to slide back and forth along the support member 13.

[0064] The various technical features of the above-described embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. In order to make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An axial flow fan driven by a permanent magnet synchronous motor, characterized in that: The axial flow fan driven by the permanent magnet synchronous motor includes: The outer shell is configured to be cylindrical with a hollow interior; A motor is disposed inside the housing and is fixedly connected to the inner wall of the housing via a plurality of connecting rods; A support member, which is cylindrical and fixedly connected to the motor; impeller members, provided in a plurality, each of the impeller members being disposed inside the housing, the plurality of impeller members being equidistantly arranged along the circumference of the support member, and each of the impeller members being rotatably connected to the support member; an adjusting assembly slidably disposed on the support member, and each of the impeller members is rotatably connected to the adjusting assembly; The driving member is arranged on the supporting member, the driving member is fixedly connected to the supporting member, and the driving member is also fixedly connected to the adjusting assembly.

2. The axial flow fan driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The impeller member comprises: A support shaft is provided on the support member, and the support shaft is rotatably connected to the support member; a first fan blade, disposed inside the housing, the first fan blade being fixedly connected to the support shaft; a second fan blade, disposed inside the housing, the second fan blade also being disposed on a side of the first fan blade away from the support shaft, the second fan blade being inserted into the first fan blade; A locking bolt is threadedly connected to the first fan blade, and one end of the locking bolt passes through the first fan blade and is inserted into the second fan blade.

3. The axial flow fan driven by a permanent magnet synchronous motor according to claim 2, characterized in that: The second fan blade is provided with a plurality of positioning holes, which are equidistantly arranged along the sliding direction of the first fan blade relative to the second fan blade, and the locking bolt is inserted into one of the positioning holes.

4. The axial flow fan driven by a permanent magnet synchronous motor according to claim 3, characterized in that: The adjustment component includes: A follower, which is configured in an arc shape and is slidably sleeved on the support member; The adapter plates are provided in plurality, the number of the adapter plates being the same as the number of the first fan blades, one end of each of the adapter plates being rotationally connected to one of the first fan blades, and the other end of each of the adapter plates being rotationally connected to the follower.

5. The axial flow fan driven by a permanent magnet synchronous motor according to claim 4, characterized in that: The plurality of adapter plates are arranged at equal intervals along the circumferential direction of the driven member.

6. The axial flow fan driven by a permanent magnet synchronous motor according to claim 5, characterized in that: The driven member comprises: A driven ring is slidably sleeved on the support member; a first limiting block, disposed on one side of the support member, the first limiting block being fixedly connected to the driven ring, the first limiting block being inserted into the support member, and the first limiting block being slidably connected to the support member; The second limit block is arranged on the other side of the support member, the second limit block is fixedly connected to the driven ring, the second limit block is inserted into the support member, and the second limit block is slidably connected to the support member.

7. The axial flow fan driven by a permanent magnet synchronous motor according to claim 6, characterized in that: The support member is provided with a first limiting groove and a second limiting groove, wherein the first limiting groove is arranged on one side of the support member, and the second limiting groove is arranged on the other side of the support member.

8. The axial flow fan driven by a permanent magnet synchronous motor according to claim 7, characterized in that: The structure of the first limiting groove is the same as that of the second limiting groove. The first limiting groove and the second limiting groove are arranged parallel to each other. The first limiting block is parallel to the axis of the support member along the sliding direction of the first limiting groove.

9. The axial flow fan driven by a permanent magnet synchronous motor according to claim 8, characterized in that: The first limiting block is slidably connected to the first limiting groove, and the second limiting block is slidably connected to the second limiting groove.

10. The axial flow fan driven by a permanent magnet synchronous motor according to claim 9, characterized in that: The driving member includes: A cylinder is provided on the support member, and the cylinder is provided near the first limiting groove; A support rod is arranged in the first limiting groove, one end of the support rod is inserted into the cylinder, and the other end of the support rod is fixedly connected to the first limiting block.

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