Twin-charger high-speed fan

Abstract

To provide a twin charger high-wind speed fan, including a driving motor, a fan housing and a fan blade.SOLUTION: A housing duct is formed inside the fan housing. The fan blade is provided with a shaft mounting portion and a blade assembly. The shaft mounting portion is tightly mounted on a power output shaft of a driving motor through a shaft mounting hole. The fan housing includes a cylindrical wall of the housing, a spherical portion and a motor fixing portion. The outer side of the spherical portion is a spherical surface. A portion of the housing duct located between the spherical portion and the cylindrical wall of the housing is in a necking shape decreasing gradually from front to back. The fan blade further comprises a middle ring portion. The blade assembly comprises a first blade assembly and a second blade assembly.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to the technical field of high speed fans, and in particular to a twin-charger high speed fan. [Background technology]

[0002] Hair dryers are widely used in people's daily lives as household items for hair care, drying clothes, etc. When a hair dryer is in operation, the internal fan operates to cause air to flow from back to front, and a heater in the hair dryer heats the air flow to generate hot air.

[0003] The small high-speed fan of Chinese Patent Application No. 202023037935.7 includes an outer casing, a blade, a motor, and a bearing, wherein the outer casing has a front end and a rear end respectively along its central axis from front to rear, the motor is fixed to the rear end of the outer casing, and the motor is connected to the blades via its output shaft, the blades and the outer casing are arranged coaxially, the blades are arranged at the front end of the outer casing, and the output shaft of the motor is connected to the outer casing via a bearing, and as can be seen from the description and drawings of the above Chinese patent application, the blades only have one blade group, and the blade group is composed of a plurality of blades distributed in a ring-shaped array.

[0004] The above small high-speed fan has the following defects during use, specifically as follows:

[0005] 1. The fan has only one blade group, so it is difficult to improve the wind pressure and speed of a high-speed fan.

[0006] 2. Turbulence is easily generated in the middle of the duct, and the turbulence action increases the vibration of the blades, causing vibration noise, i.e., the noise is loud and the sound deadening effect is poor.

[0007] 3. The air intake of the outer casing duct is only in the ring-shaped part of the corresponding blade area, resulting in a large loss of air intake area and a small amount of air intake. Summary of the Invention [Problem to be solved by the invention]

[0008] The objective of the present invention is to provide a twin-charger high wind speed fan in response to the shortcomings of the prior art, which has the advantages of novel structural design, high working wind speed, small turbulence, low noise and good sound absorbing effect. [Means for solving the problem]

[0009] To achieve the above objectives, the present invention uses the following technical solutions:

[0010] The high air speed fan of the twin charger includes a drive motor, a fan housing, and fan blades, an outer housing duct is formed inside the fan housing, the fan blades are located in a front end air intake port of the outer housing duct, and the drive motor is provided on the fan housing;

[0011] The fan blade is provided with a shaft mounting portion and a group of blades, and a shaft mounting hole is formed at the middle position of the shaft mounting portion, and the shaft mounting portion is fastened to the power output shaft of the drive motor through the shaft mounting hole,

[0012] the fan outer housing includes a cylindrical wall of the cylindrical housing, a spherical portion is provided inside the cylindrical wall of the outer housing and is arranged coaxially with the cylindrical wall of the outer housing, a motor fixing portion is provided at an edge of a rear end of the spherical portion and arranged at a distance from the cylindrical wall of the outer housing, a drive motor is fastened to the motor fixing portion, a power output shaft of the drive motor is attached to the spherical portion via a bearing, and fan blades are located on the front end side of the spherical portion,

[0013] an outer wall of the spherical portion is spherical, and a portion of the outer casing duct located between the spherical portion and the cylindrical wall of the outer casing is neck-shaped so as to become gradually smaller from the front to the rear;

[0014] the fan blades are ring-shaped and further include an intermediate ring section located on the outer periphery of the shaft mounting section, the intermediate ring section and the shaft mounting section being coaxially arranged at a distance from each other, the blade group includes a first blade group and a second blade group, the first blade group includes a plurality of first drive blades distributed in a ring-shaped array between the shaft mounting section and an inner wall of the intermediate ring section, the first blade group includes a plurality of second drive blades distributed in a ring-shaped array on an outer wall of the intermediate ring section, the shaft mounting section, the intermediate ring section, the first blade group, and the second blade group are of an integral structure;

[0015] the shaft mounting part is frustum-shaped with a small diameter at the front end and a large diameter at the rear end, the side wall of the shaft mounting part is a conical air guide surface having a conical surface shape, the inner wall of the intermediate ring part is flared so as to gradually increase in diameter from the front to the rear, the passage between the conical air guide surface of the shaft mounting part and the inner wall of the intermediate ring part is an internal duct of the blade, and the internal duct of the blade is flared so as to gradually increase in diameter from the rear to the front,

[0016] The passage between the outer wall of the intermediate ring portion and the cylindrical wall of the outer casing is the outer duct of the vane, which is flared to become gradually larger from rear to front.

[0017] Here, the thickness value of the central portion of the intermediate ring portion is greater than the thickness values ​​of both ends, and the front end of the outer wall and the front end of the inner wall directly transition to each other via a circular arc-shaped curved surface.

[0018] Here, the front end of the shaft mounting portion extends to the front end side of the intermediate ring portion, and the front end of the conical air guide surface and the front end face of the shaft mounting portion transition to each other via a round corner.

[0019] wherein the motor fixing part includes a plurality of motor fixing plates, each of which is distributed in a ring-like array and has an arc shape, a front end of each motor fixing plate is connected to the spherical part, and a housing of the driving motor is fastened and fixed via the motor fixing plate;

[0020] Between two adjacent motor fixing plates, a positioning heat dissipation gap communicating with the outer casing duct is formed, and in the outer casing of the driving motor, outer casing protrusions are provided corresponding to each positioning heat dissipation gap, and each outer casing protrusion is mounted in its corresponding positioning heat dissipation gap.

[0021] Here, an outer housing rib plate is provided between each of the motor fixing plates and the cylindrical wall of the outer housing, and all the outer housing rib plates are distributed in a ring-shaped array, and the spherical portion, the motor fixing plate, the outer housing rib plate and the cylindrical wall of the outer housing are an integrated structure.

[0022] Here, the fan blade is a solid metal member or a solid plastic member.

[0023] Here, each of the first driving blades is a centrifugal blade, and each of the second driving blades is an axial blade. Effect of the Invention

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. The fan blade of the present invention drives the air flow in the middle of the duct by each first driving blade of the first blade group, thereby reducing the turbulence of the air in the middle of the duct, achieving the purpose of reducing turbulence, effectively reducing the vibration noise caused by turbulence, and improving the sound deadening effect of the fan;

[0026] 2. The fan blades of the present invention cooperate with the first blade group and the second blade group to drive the air flow, and the above two-blade group structure can effectively improve the wind pressure and further improve the wind speed.

[0027] 3. In the process of the driving motor driving the fan blades to rotate by its power output shaft, each first driving blade of the first blade group guides the air flow through the internal duct of the fan blade to enter between the spherical portion and the cylindrical wall of the outer casing, and each second driving blade of the second blade group guides the air flow through the external duct of the fan blade to enter between the spherical portion and the cylindrical wall of the outer casing, and the internal duct of the blade and the external duct of the blade are respectively flared so as to gradually become larger from the rear to the front, and the above-mentioned flared internal duct of the blade and the external duct of the blade can effectively increase the area of ​​the air intake port, and further improve the amount of air intake and wind speed.

[0028] 4. The shaft mounting portion is in the shape of a truncated cone with a small diameter at the front end and a large diameter at the rear end, so that the internal duct of the blade located between the conical air guide surface and the inner wall of the intermediate ring portion can guide the air flow driven by the first blade group to blow at an incline toward the spherical surface of the spherical portion, thus effectively reducing the resistance of the internal duct of the blade, and further improving the wind speed and air supply volume.

[0029] 5. The spherical portion of the present invention can effectively increase the intake area of ​​the front intake port of the fan housing, and reduce the loss of the intake area, thereby improving the amount of intake air.

[0030] 6. The present invention has the advantages of novel structural design, high working wind speed, small turbulence, low noise and good sound absorbing effect. [Brief description of the drawings]

[0031] The present invention will now be further described with reference to the drawings, to which, however, the invention is not limited.

[0032] [Figure 1] FIG. 2 is a structural schematic diagram of the present invention. [Diagram 2] FIG. 2 is an exploded view of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view of the present invention. [Figure 4] FIG. 4 is a locally enlarged view of FIG. [Diagram 5] FIG. 2 is a cross-sectional view of another position of the present invention. [Figure 6] FIG. 2 is a structural schematic diagram of a fan blade according to the present invention; [Figure 7] FIG. 4 is a structural schematic diagram of a fan blade according to another aspect of the present invention. [Figure 8] FIG. 2 is a schematic diagram showing the structure of the outer casing of the fan of the present invention; [Figure 9] FIG. 2 is a comparison diagram of a fan blade according to the present invention and a simulation diagram of a duct of a conventional blade; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] The invention will now be described with reference to specific embodiments. EXAMPLES

[0034] As shown in Figures 1 to 4, the twin-charger high speed fan includes a drive motor 1, a fan housing 2, and fan blades 3, with an outer housing duct 21 formed inside the fan housing 2, the fan blades 3 being located within the front end air intake port of the outer housing duct 21, and the drive motor 1 being provided in the fan housing 2.

[0035] Here, as shown in Figures 1, 2, 3, 4, 6 and 7, the fan blade 3 is provided with a shaft mounting portion 31 and a group of blades, and a shaft mounting hole 311 is opened at the midpoint of the shaft mounting portion 31, and the shaft mounting portion 31 is fastened to the power output shaft of the drive motor 1 via the shaft mounting hole 311.

[0036] Furthermore, as shown in Figures 1, 2, 3, 4, 5 and 8, the outer housing 2 of the fan includes a cylindrical wall 22 of the cylindrical outer housing, and in the outer housing 2 of the fan, a spherical portion 23 is provided inside the cylindrical wall 22 of the outer housing, and a motor fixing portion 24 is provided at the edge of the rear end of the spherical portion 23 and arranged at a distance from the cylindrical wall 22 of the outer housing. The drive motor 1 is fastened and attached to the motor fixing portion 24, the power output shaft of the drive motor 1 is attached to the spherical portion 23 via a bearing, and the fan blades 3 are located on the front end side of the spherical portion 23.

[0037] Furthermore, as shown in Figures 2 to 4, the outer wall of the spherical portion 23 is spherical, and a portion of the outer housing duct 21 located between the spherical portion 23 and the cylindrical wall 22 of the outer housing is neck-shaped so as to gradually become smaller from the front to the rear.

[0038] As shown in Figures 3, 4, 6 and 7, the fan blade 3 is ring-shaped and further includes an intermediate ring portion 32 located on the outer periphery of the shaft mounting portion 31, the intermediate ring portion 32 and the shaft mounting portion 31 are arranged coaxially and spaced apart, the blade group includes a first blade group and a second blade group, the first blade group includes a plurality of first driving blades 33 distributed in a ring-shaped array between the shaft mounting portion 31 and the inner wall of the intermediate ring portion 32, the first blade group includes a plurality of second driving blades 34 distributed in a ring-shaped array on the outer wall of the intermediate ring portion 32, and the shaft mounting portion 31, the intermediate ring portion 32, the first blade group and the second blade group are of an integrated structure. The fan blade 3 is an integral metal member or an integral plastic member.

[0039] As shown in Figures 3 and 4, the shaft mounting part 31 is frustum-shaped with a small diameter at the front end and a large diameter at the rear end, the side wall of the shaft mounting part 31 is a conical air guide surface 312 having a conical surface shape, the inner wall of the intermediate ring part 32 is flared so that it gradually becomes larger from the front to the rear, and the passage between the conical air guide surface 312 of the shaft mounting part 31 and the inner wall of the intermediate ring part 32 is an internal duct 35 of the blade, which is flared so that it gradually becomes larger from the rear to the front.

[0040] As shown in Figures 3 and 4, the passage between the outer wall of the intermediate ring portion 32 and the cylindrical wall 22 of the outer casing is the external duct 36 of the blade, and the external duct 36 of the blade has a flared shape that gradually becomes larger from the rear to the front.

[0041] In the operating process of this embodiment 1, the drive motor 1 rotates the fan blades 3 by its power output shaft, and the fan blades 3 are driven by each first drive blade 33 of the first blade group and each second drive blade 34 of the second blade group to cause air to flow, forming an air flow that passes through the outer casing duct 21 of the fan outer casing 2 from front to rear.

[0042] In addition, the fan blade 3 of the first embodiment drives the air flow in the middle of the duct by each first driving blade 33 of the first blade group, so that the air disturbance in the middle of the duct is reduced, the purpose of reducing the turbulence is achieved, the noise of the vibration caused by the turbulence is effectively reduced, and the sound deadening effect of the fan is improved. Furthermore, the fan blade 3 of the first embodiment drives the air flow in cooperation with the first blade group and the second blade group, and the above two blade group structure can effectively improve the wind pressure and further improve the wind speed. As shown in Figure 9, compared with the conventional blade structure, the fan blade 3 of the first embodiment can effectively reduce the turbulence.

[0043] In addition, in the process of driving the drive motor 1 to rotate the fan blade 3 by its power output shaft, each first drive blade 33 of the first blade group encourages the air flow to enter between the spherical portion 23 and the cylindrical wall 22 of the outer casing through the internal duct 35 of the fan blade 3, and each second drive blade 34 of the second blade group encourages the air flow to enter between the spherical portion 23 and the cylindrical wall 22 of the outer casing through the external duct 36 of the fan blade 3, and the internal duct 35 of the blade and the external duct 36 of the blade are each flared so as to gradually become larger from the rear to the front, and the above-mentioned flared internal duct 35 of the blade and the external duct 36 of the blade can effectively increase the area of ​​the air intake port, and further improve the amount of air intake and wind speed.

[0044] Furthermore, since the shaft mounting portion 31 is frustum-shaped with a small diameter at the front end and a large diameter at the rear end, the internal duct 35 of the blade located between the conical air guide surface 312 and the inner wall of the intermediate ring portion 32 can guide the air flow driven by the first blade group so that it blows at an angle toward the spherical surface of the spherical portion 23.In this way, the resistance force of the internal duct 35 of the blade can be effectively reduced, and further the wind speed and air supply volume can be improved.

[0045] In addition, the spherical portion 23 of the first embodiment effectively increases the air intake area of ​​the front end air intake port of the outer casing 2 of the fan, and reduces the loss of the air intake area, thereby improving the amount of air intake.

[0046] The test data of the high wind speed fan of the twin charger of the present embodiment 1 is shown in the table below. [Table 1]

[0047] Therefore, in summary, the twin-charger high wind speed fan of this embodiment 1 has the advantages of novel structural design, high working wind speed, small turbulence, low noise, and good sound absorbing effect. EXAMPLES

[0048] 3 and 4, the differences between the present embodiment 2 and the embodiment 1 are as follows: the thickness value of the center part of the intermediate ring part 32 is greater than the thickness values ​​of both ends, and the front end of the outer wall and the front end of the inner wall directly transition to each other via a circular arc-shaped curved surface 321.

[0049] In the intermediate ring part 32 of the second embodiment, the thickness value of the middle part is greater than the thickness value of both ends, so that the thickened middle part can effectively ensure the overall strength of the intermediate ring part 32 and the connection strength of each second driving blade 34. In addition, because the thickness values ​​of both ends of the intermediate ring part 32 are small, this structural design of the intermediate ring part 32 can effectively reduce the obstruction of the air flow at both ends, increase the area of ​​the air passage at both ends, and improve the amount of air supply. EXAMPLES

[0050] As shown in Fig. 4, the difference between the present embodiment 3 and the embodiment 1 is as follows: The front end of the shaft mounting part 31 extends to the front end side of the intermediate ring part 32, and the front end of the conical air guide surface 312 and the front end face of the shaft mounting part 31 transition to each other via a round corner 313.

[0051] The shaft mounting part 31 of this structural design can effectively enhance the guiding action of the conical air guide surface 312, improve the amount of air supply to the inner duct 35 of the blade, and due to the transition by the round corner 313, the front end surface of the shaft mounting part 31 in this embodiment 3 can effectively reduce the obstruction effect on the air flow. EXAMPLES

[0052] As shown in Figures 5 and 8, the motor fixing part 24 includes a plurality of motor fixing plates 241 distributed in a ring-like array and each having an arc shape, and the front end of each motor fixing plate 241 is connected to a spherical part, and the housing of the driving motor 1 is tightened and fixed via the motor fixing plates 241.

[0053] Here, between two adjacent motor fixing plates 241, a positioning heat dissipation gap 242 communicating with the outer casing duct 21 is formed, and in the outer casing of the driving motor 1, the outer casing protrusions 11 are each provided corresponding to each positioning heat dissipation gap 242, and each outer casing protrusion 11 is mounted within the corresponding positioning heat dissipation gap 242.

[0054] In addition, an outer housing rib plate 25 is provided between each motor fixing plate 241 and the cylindrical wall 22 of the outer housing, and all of the outer housing rib plates 25 are distributed in a ring-shaped array, and the spherical portion 23, motor fixing plate 241, outer housing rib plate 25 and cylindrical wall 22 of the outer housing have an integrated structure.

[0055] In the process of fixing the driving motor 1 to the motor fixing part 24, with the cooperation of the outer casing protrusion part 11 and the positioning heat dissipation gap 242, the present embodiment 4 realizes quick installation and positioning of the driving motor 1, thereby improving the assembly efficiency and accuracy of the driving motor 1.

[0056] Furthermore, in the case of the positioning heat dissipation gap 242 of this embodiment 4, when the driving motor 1 is attached to the motor fixing part 24, the motor fixing part 24 tightens and fixes the housing of the driving motor 1 with multiple motor fixing plates 241, and the outer housing protrusion 11 of the driving motor 1 is exposed from the outer housing duct 21, and in the process of the driving motor 1 driving the fan blades to cause air to flow through the outer housing duct 21, the air flow directly drives the housing of the driving motor 1, reducing the rotational speed of the driving motor 1 to dissipate heat, and extending the service life of the driving motor 1. EXAMPLES

[0057] The differences between this embodiment 5 and embodiment 1 are as follows: Each of the first driving blades 33 is a centrifugal blade, and each of the second driving blades 34 is an axial blade.

[0058] The above content is merely a preferred embodiment of the present invention, and a person skilled in the art may modify the specific embodiment and scope of application according to the concept of the present invention, and the content of this specification should not be construed as limiting the present invention. [Explanation of symbols]

[0059] 1. Driving motor, 11. Outer casing protrusion, 2. Outer casing of fan, 21. Outer casing duct, 22. Cylindrical wall of outer casing, 23. Spherical portion, 24. Motor fixing portion, 241. Motor fixing plate, 242. Positioning heat dissipation gap, 25. Outer casing rib plate, 3. Fan blade, 31. Shaft mounting portion, 311, Shaft mounting hole, 312. Conical air guide surface, 313. Round corner, 32. Intermediate ring portion, 321. Arc-shaped curved surface, 33. First driving blade, 34. Second driving blade, 35. Inner duct of blade, 36. Outer duct of blade

Claims

1. The fan includes a drive motor (1), a fan housing (2), and fan blades (3), an outer housing duct (21) is formed inside the fan housing (2), the fan blades (3) are located within a front end air intake port of the outer housing duct (21), and the drive motor (1) is provided in the fan housing (2); The fan blades (3) are provided with a shaft mounting portion (31) and a group of blades, a shaft mounting hole (311) is formed in the middle of the shaft mounting portion (31), and the shaft mounting portion (31) is fastened to a power output shaft of a drive motor (1) via the shaft mounting hole (311), in a twin-charger high-speed fan, The outer casing (2) of the fan includes a cylindrical wall (22) of the cylindrical outer casing, a spherical portion (23) arranged coaxially with the cylindrical wall (22) of the outer casing is provided inside the cylindrical wall (22) of the outer casing, a motor fixing portion (24) arranged at a distance from the cylindrical wall (22) of the outer casing is provided at the edge of the rear end of the spherical portion (23), a drive motor (1) is fastened and attached to the motor fixing portion (24), a power output shaft of the drive motor (1) is attached to the spherical portion (23) via a bearing, and fan blades (3) are located on the front end side of the spherical portion (23), the outer wall of the spherical portion (23) is spherical, and a portion of the outer casing duct (21) located between the spherical portion (23) and the cylindrical wall (22) of the outer casing is neck-shaped so as to become gradually smaller from the front to the rear; the fan blade (3) is ring-shaped and further includes an intermediate ring section (32) located on the outer periphery of the shaft mounting section (31), the intermediate ring section (32) and the shaft mounting section (31) being coaxially arranged at a distance from each other, the blade group includes a first blade group and a second blade group, the first blade group includes a plurality of first driving blades (33) distributed in a ring-shaped array between the shaft mounting section (31) and an inner wall of the intermediate ring section (32), the first blade group includes a plurality of second driving blades (34) distributed in a ring-shaped array on an outer wall of the intermediate ring section (32), the shaft mounting section (31), the intermediate ring section (32), the first blade group and the second blade group being of an integral structure; The shaft mounting portion (31) is in the shape of a truncated cone with a small diameter at the front end and a large diameter at the rear end, the side wall of the shaft mounting portion (31) is a conical air guide surface (312) having a conical surface shape, the inner wall of the intermediate ring portion (32) is in a flare shape that gradually becomes larger from the front to the rear, the passage between the conical air guide surface (312) of the shaft mounting portion (31) and the inner wall of the intermediate ring portion (32) is an internal duct (35) of the blade, and the internal duct (35) of the blade is in a flare shape that gradually becomes larger from the rear to the front, The passage between the outer wall of the intermediate ring portion (32) and the cylindrical wall (22) of the outer casing is an outer duct (36) of the blades, and the outer duct (36) of the blades is flared so as to gradually become larger from the rear to the front.

2. The high wind speed fan of the twin charger as described in claim 1, characterized in that the thickness value of the middle part of the intermediate ring part (32) is greater than the thickness values ​​of both ends, and the front end of the outer wall and the front end of the inner wall directly transition through a circular arc curved surface (321).

3. 2. The high air speed fan of claim 1, wherein a front end of the shaft mounting portion (31) extends to a front end side of the intermediate ring portion (32), and a front end of the conical air guide surface (312) and a front end face of the shaft mounting portion (31) transition to each other via a round corner (313).

4. The motor fixing portion (24) includes a plurality of motor fixing plates (241) each having an arc shape and distributed in a ring-like array, the front end of each motor fixing plate (241) is connected to the spherical portion (23), and the housing of the drive motor (1) is fastened and fixed via the motor fixing plates (241); The high air speed fan of the twin charger according to claim 1, characterized in that a positioning heat dissipation gap (242) communicating with the outer casing duct (21) is formed between two adjacent motor fixing plates (241), and in the outer casing of the driving motor (1), the outer casing protrusions (11) are provided corresponding to each positioning heat dissipation gap (242), and each outer casing protrusion (11) is attached within the corresponding positioning heat dissipation gap (242).

5. 5. The high wind speed fan of claim 4, characterized in that an outer housing rib plate (25) is provided between each of the motor fixing plates (241) and the cylindrical wall (22) of the outer housing, all the outer housing rib plates (25) are distributed like a ring-shaped array, and the spherical portion (23), the motor fixing plate (241), the outer housing rib plate (25) and the cylindrical wall (22) of the outer housing are an integrated structure.

6. The twin-charger high speed fan as claimed in claim 1, characterized in that the fan blade (3) is a solid metal part or a solid plastic part.

7. The high wind speed fan of the twin charger according to claim 1, characterized in that each of the first driving blades (33) is a centrifugal blade, and each of the second driving blades (34) is an axial blade.

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