JP3243655U - Twin charger high speed fan - Google Patents

Abstract

The present invention provides a twin-charger high wind speed fan with novel structural design, high working wind speed, small turbulence, low noise, and good silencing effect. A twin-charger high-speed fan includes a drive motor, a fan outer casing, and fan blades. The blade of the fan is provided with a shaft mounting part, two blade groups, and further includes an intermediate ring part, and the shaft mounting part is fastened to the power output shaft of the drive motor through the shaft mounting hole, and the shaft mounting part is fastened to the power output shaft of the drive motor through the shaft mounting hole. The outer casing includes a cylindrical wall of the outer casing, a spherical part, and a motor fixing part, and a part of the duct of the outer casing located between the spherical part and the cylindrical wall of the outer casing gradually extends from the front to the back. The shaft mounting part is shaped like a truncated cone, the side wall of the shaft mounting part is a conical air guide surface, and the inner wall of the intermediate ring part is flared and has a blade shape. The inner duct of the vane and the outer duct of the vane are each flared in shape, gradually increasing in size from the rear to the front. [Selection diagram] Figure 3

Description

The present invention relates to the technical field of high-speed fans, and more particularly to twin-charger high-speed fans.

Hair dryers are widely used in people's daily lives as daily necessities for hair care, drying clothes, etc. When the hair dryer operates, the fan inside it operates and the air flows from back to front, causing the inside of the hair dryer to flow from back to front. A heater heats the air stream to produce hot air.

The small high-speed fan of Chinese Patent Application No. 202023037935.7 includes an outer casing, a blade, a motor, and a bearing, and the outer casing has a front end and a rear end, respectively, from the front to the rear along the central axis. provided, the motor is fixed to the rear end of the outer casing, the motor is connected to the blade via its output shaft, the blade and the outer casing are provided coaxially, the blade is provided at the front end of the outer casing, The output shaft of the motor is connected to the outer housing through a bearing, and as can be seen from the specification and drawings of the above-mentioned Chinese patent application, its blades have only one blade group, and the blade group is ring-shaped. It consists of multiple blades distributed like an array.

Note that the above-mentioned small high-speed fan has the following defects during use, and the specific defects are as follows.

1. Since the blades have only one group of blades, it is difficult to increase the wind pressure and speed of high-speed fans.

2. Turbulent flow is more likely to occur in the middle position of the duct, and the turbulent flow effect improves the vibration of the blades, resulting in vibration noise, which has the disadvantage that the noise is louder and the silencing effect is worse;

3. Since the air supply port of the outer casing duct is only in the ring-shaped portion of the corresponding blade region, there are disadvantages in that the loss of air supply area is large and the amount of air supply is small.

The purpose of the present invention is to provide a twin-charger high-wind speed fan for the lack of conventional technology, and the twin-charger high-speed fan has a novel structure design, high working wind speed, small turbulence, low It has the advantages of low noise and good sound deadening effect.

To achieve the above objective, the present invention uses the following technical solutions.

The twin charger high speed fan includes a drive motor, a fan outer casing, and fan blades, and an outer casing duct is molded inside the fan outer casing, and the fan blades are connected to the front end of the outer casing duct. located within the air vent, and the drive motor is provided in the outer casing of the fan;

The fan blade is provided with a shaft mounting part and a blade group, and a shaft mounting hole is drilled in the middle of the shaft mounting part, and the shaft mounting part is tightened to the power output shaft of the drive motor through the shaft mounting hole. attached,

The outer housing of the fan includes a cylindrical wall of the outer housing having a cylindrical shape; A motor fixing part is provided at the edge of the rear end of the spherical part and is spaced apart from the cylindrical wall of the outer casing. is attached to the spherical part via a bearing, and the fan blades are located on the front end side of the spherical part.

The outer wall of the spherical part is a spherical surface, and a part of the outer casing duct located between the spherical part and the cylindrical wall of the outer casing has a neck shape that gradually becomes smaller from front to back.

The fan blade is ring-shaped and further includes an intermediate ring part located on the outer periphery of the shaft attachment part, the intermediate ring part and the shaft attachment part are coaxial and spaced apart, and the blade group is a first blade group. and a second group of blades, the first group of blades including a plurality of first drive blades distributed in a ring-shaped array between the shaft mounting portion and the inner wall of the intermediate ring portion; The blade group includes a plurality of second driving blades distributed in a ring-shaped array on the outer wall of the intermediate ring portion, and the shaft mounting portion, the intermediate ring portion, the first blade group, and the second blade group are integrally connected to each other. structure,

The shaft mounting part has a truncated conical shape with a small diameter at the front end and a large diameter at the rear end, and the side wall of the shaft mounting part is a conical air guide surface with a conical surface shape. The wall is flared, gradually increasing in size from front to back, and the passage between the conical air guide surface of the shaft attachment part and the inner wall of the intermediate ring part is the internal duct of the vane, The internal duct is flared, gradually increasing in size from the back to the front.

The passage between the outer wall of the intermediate ring part and the cylindrical wall of the outer housing is the outer duct of the vane, and the outer duct of the vane has a flared shape that gradually increases from back to front.

Here, the thickness value of the middle part of the intermediate ring part is larger than the thickness value of both ends, and the front end of the outer wall and the front end of the inner wall directly transition through an arc-shaped curved surface.

Here, the front end of the shaft attachment 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 surface of the shaft attachment portion transition through a round corner.

Here, the motor fixing part includes a plurality of motor fixing plates distributed like a ring-shaped array and each having an arc shape, a front end of each motor fixing plate is connected to the spherical part, and the drive The motor casing is tightened and fixed via the motor fixing plate,

A positioning heat dissipation gap communicating with the outer casing duct is formed between two adjacent motor fixing plates, and on the outer casing of the drive motor, outer casing protrusions are provided corresponding to each positioning heat dissipation gap. The outer casing protrusions are installed within the corresponding positioning heat dissipation gaps.

Here, an outer casing rib plate is provided between each of the motor fixing plates and the cylindrical wall of the outer casing, and all the outer casing rib plates are distributed like a ring-shaped array, and the spherical part, The motor fixing plate, the outer casing rib plate, and the cylindrical wall of the outer casing have an integrated structure.

Here, the blade of the fan is an integral metal member or an integral plastic member.

Here, each of the first driving blades is a centrifugal blade, and each of the second driving blades is an axial blade.

Compared with the prior art, the beneficial effects of the present invention are as follows.

1. The fan blade of the present invention drives the air flow at the middle position of the duct by each first driving blade of the first blade group, so that the air turbulence at the middle position of the duct is reduced and the turbulence is reduced. Achieving the purpose of effectively reducing the vibration noise caused by turbulence and improving the fan noise reduction effect,

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 structures can effectively improve the wind pressure and further improve the wind speed. can be done.

3. In the process in which the drive motor drives the fan blades to rotate by its power output shaft, each first drive blade of the first blade group is configured so that the air flow is directed between the spherical part and the outer casing by the internal duct of the fan blade. each second drive blade of the second blade group urges the air flow to enter between the spherical part and the cylindrical wall of the outer housing by an external duct of the fan blade; , the inner duct of the vane, and the outer duct of the vane are each flared in shape, gradually increasing in size from the rear to the front. In addition, it is possible to increase the air supply amount and wind speed.

4. Since the shaft mounting part has a truncated conical shape with a small diameter at the front end and a large diameter at the rear end, the internal duct of the vane located between the conical air guide surface and the inner wall of the intermediate ring part is The air flow driven by the first blade group can be guided to blow obliquely to the spherical surface of the spherical part, thus effectively reducing the resistance force of the internal duct of the vane, and further increasing the wind speed. and the amount of air supply can be improved.

5. The spherical part of the present invention can effectively increase the air supply area of the front end air supply port of the outer casing of the fan, and can improve the air supply amount by reducing the loss of the air supply area.

6. The present invention has the advantages of novel structural design, high working wind speed, small turbulence, low noise, and good sound damping effect.

Hereinafter, the present invention will be further explained with reference to the drawings. However, the embodiments in the drawings do not limit the invention.

FIG. 2 is a structural schematic diagram of the present invention. FIG. 2 is an exploded view of the present invention. FIG. 2 is a cross-sectional view of the present invention. 4 is a locally enlarged view of FIG. 3. FIG. FIG. 3 is a cross-sectional view of the present invention in another position; FIG. 3 is a schematic diagram of the structure of a fan blade according to the present invention; FIG. 3 is a schematic diagram of the structure of the fan blade from another perspective of the present invention; FIG. 3 is a schematic structural diagram of the outer casing of the fan of the present invention. FIG. 2 is a comparison diagram of a fan blade according to the present invention and a simulation diagram of a conventional blade duct;

The invention will now be described with reference to specific embodiments.

As shown in FIGS. 1 to 4, the twin charger high speed fan includes a drive motor 1, a fan outer casing 2, and fan blades 3, and an outer casing duct 21 inside the fan outer casing 2. The fan blades 3 are located within the front end air supply port of the outer casing duct 21, and the drive motor 1 is provided in the outer casing 2 of the fan.

Here, as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 6, and FIG. A shaft mounting hole 311 is formed in the shaft mounting hole 311, and the shaft mounting portion 31 is fastened to the power output shaft of the drive motor 1 through the shaft mounting hole 311.

Furthermore, as shown in FIGS. 1, 2, 3, 4, 5, and 8, the fan outer housing 2 includes a cylindrical wall 22 of the cylindrical outer housing, and the fan outer housing 2 includes: A spherical part 23 is provided inside the cylindrical wall 22 of the outer casing and is disposed coaxially with the cylindrical wall 22 of the outer casing. A motor fixing part 24 is provided, the drive motor 1 is fastened to the motor fixing part 24, and the power output shaft of the drive motor 1 is attached to the spherical part 23 via a bearing. The blade 3 is located on the front end side of the spherical portion 23.

Furthermore, as shown in FIGS. 2 to 4, the outer wall of the spherical part 23 is a spherical surface, and a part of the outer casing duct 21 located between the spherical part 23 and the cylindrical wall 22 of the outer casing is It has a neck shape that gradually becomes smaller from the beginning to the end.

As shown in FIGS. 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 attachment portion 31. The shaft attachment portion 31 is coaxially arranged at intervals, and the blade group includes a first blade group and a second blade group, and the first blade group is arranged on the inner side of the shaft attachment portion 31 and the intermediate ring portion 32. The first blade group includes a plurality of first driving blades 33 distributed in a ring-shaped array between the intermediate ring portion 32 and the outer wall of the intermediate ring portion 32. Including two driving blades 34, the shaft attachment part 31, the intermediate ring part 32, the first blade group, and the second blade group are of an integrated structure. The fan blades 3 are one-piece metal parts or one-piece plastic parts.

As shown in FIGS. 3 and 4, the shaft mounting portion 31 has a truncated conical shape with a small diameter at the front end and a large diameter at the rear end, and the side wall of the shaft mounting portion 31 has a conical shape with a conical surface shape. The inner wall of the intermediate ring portion 32 has a flared shape that gradually increases in size from front to rear, and the conical air guide surface 312 of the shaft attachment portion 31 and the inner wall of the intermediate ring portion 32 have a flared shape that gradually increases from front to rear. The passage between the inner wall and the inner wall is an internal duct 35 of the vane, and the internal duct 35 of the vane has a flared shape that gradually increases in size from the back to the front.

As shown in FIGS. 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 an external duct 36 of the blade, and the external duct 36 of the blade is It has a flared shape that gradually increases in size toward the front.

In the operation process of the first embodiment, the drive motor 1 rotates the fan blades 3 by its power output shaft, and the fan blades 3 are configured to rotate each first drive blade 33 of the first blade group and Each second drive blade 34 of the second blade group drives the air to flow, forming an air flow that passes through the outer casing duct 21 of the fan outer casing 2 from front to back. do.

In addition, since the fan blades 3 of the first embodiment drive the air flow at the intermediate position of the duct by each first drive blade 33 of the first blade group, the turbulence of the air at the intermediate position of the duct is reduced. This achieves the purpose of reducing turbulence, effectively reduces the vibration noise caused by turbulence, and improves the silencing effect of the fan. , cooperate with the second blade group to drive the air flow, the above two blade group structure can effectively improve the wind pressure and further improve the wind speed. As shown in FIG. 9, compared to the conventional blade structure, the fan blade 3 of the first embodiment can effectively reduce turbulence.

In addition, in the process of driving the drive motor 1 so that the fan blades 3 are rotated by its power output shaft, each first drive blade 33 of the first blade group is configured so that the air flow is connected to the internal duct 35 of the fan blade 3. The airflow is directed between the spherical part 23 and the cylindrical wall 22 of the outer casing by the external duct 36 of the fan blade 3, and each second drive blade 34 of the second blade group The inner duct 35 of the blade and the outer duct 36 of the blade are each flared in shape, gradually increasing in size from the rear to the front, and the blade has a flared shape. The internal duct 35 and the external duct 36 of the vane can effectively increase the area of the air supply port, and further improve the air supply amount and wind speed.

Note that since the shaft mounting portion 31 has a truncated conical shape with a small diameter at the front end and a large diameter at the rear end, the blade located between the conical air guide surface 312 and the inner wall of the intermediate ring portion 32 The internal duct 35 of the vane can guide the air flow driven by the first blade group so that it blows obliquely to the spherical surface of the spherical part 23, and in this way, the resistance force of the internal duct 35 of the vane can be effectively In addition, the wind speed and air supply amount can be improved.

Note that the spherical portion 23 of the first embodiment effectively increases the air supply area of the front end air supply port of the fan's outer casing 2, and can improve the air supply amount by reducing the loss of the air supply area. can.

The test data of the twin charger high speed fan of Example 1 is shown in the table below.

Therefore, in summary, the twin-charger high wind speed fan of Example 1 has the advantages of novel structural design, high working wind speed, small turbulence, low noise, and good sound damping effect.

As shown in FIGS. 3 and 4, the differences between the second embodiment and the first embodiment are as follows. The thickness value of the middle part of the intermediate ring part 32 is larger than the thickness value of both ends, and the front end of the outer wall and the front end of the inner wall directly transition through the arc-shaped curved surface 321.

In the intermediate ring portion 32 of the second embodiment, since the thickness value of the middle portion is larger than the thickness value of both ends, the position of the thickened middle portion effectively increases the overall strength of the intermediate ring portion 32. Therefore, the connection strength of each second drive blade 34 can be effectively ensured. In addition, because the thickness values at both ends of the intermediate ring part 32 are small, in this structural design, the intermediate ring part 32 can effectively reduce the obstruction to the air flow at both ends, and the It is possible to increase the area of the passage and improve the amount of air supply.

As shown in FIG. 4, the differences between the third embodiment and the first embodiment are as follows. The front end of the shaft attachment 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 surface of the shaft attachment part 31 transition via a round corner 313.

The shaft mounting part 31 of this structural design can effectively enhance the guiding effect of the conical air guide surface 312 and improve the air supply amount of the internal duct 35 of the vane, and is transitioned by the round corner 313, so In the third embodiment, the front end surface of the shaft attachment portion 31 can effectively reduce the obstructive effect on the air flow.

As shown in FIGS. 5 and 8, the motor fixing part 24 includes a plurality of motor fixing plates 241 distributed like a ring-shaped array and each having an arc shape, and the front end of each motor fixing plate 241 is The casing of the drive motor 1 is connected to the spherical part and fixed by tightening via the motor fixing plate 241 .

Here, 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 drive motor 1, the outer casing protrusion 11 is located at each positioning position. It is provided corresponding to the heat radiation gap 242, and each outer casing protrusion 11 is attached within the corresponding positioning heat radiation gap 242.

Note that an outer casing rib plate 25 is provided between each motor fixing plate 241 and the cylindrical wall 22 of the outer casing, and all the outer casing rib plates 25 are distributed like a ring-shaped array, and the spherical part 23 , the motor fixing plate 241, the outer casing rib plate 25, and the cylindrical wall 22 of the outer casing have an integrated structure.

In the process of fixing the drive motor 1 to the motor fixing part 24, the fourth embodiment realizes the quick installation and positioning of the drive motor 1 through the cooperation of the outer casing protrusion 11 and the positioning heat radiation gap 242. To improve the assembly efficiency and accuracy of the drive motor 1.

Furthermore, in the case of the positioning heat dissipation gap 242 of the fourth embodiment, when the drive motor 1 is attached to the motor fixing part 24, the motor fixing part 24 tightens and fixes the housing of the drive motor 1 with the plurality of motor fixing plates 241. , the outer casing protrusion 11 of the drive motor 1 is exposed from the outer casing duct 21, and in the process of the drive motor 1 driving the fan blades to cause the air to flow through the outer casing duct 21, the air flow is directly drives the housing of the drive motor 1, reduces the rotational speed of the drive motor 1, dissipates heat, and extends the service life of the drive motor 1.

The differences between Example 5 and Example 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.

The foregoing content is only a preferred embodiment of the present invention, and those skilled in the art will be able to change the specific embodiment and scope of application according to the idea of the present invention, and the content of this specification may be changed from the present invention to the present invention. It should not be construed as limiting the invention.

1. Drive motor, 11. Outer casing protrusion, 2. Fan outer casing, 21. Outer casing duct, 22. Cylindrical wall of outer casing, 23. Spherical part, 24. Motor fixing part, 241. Motor fixing plate, 242. Positioning heat radiation gap, 25. Outer casing rib plate, 3. Fan blades, 31. Shaft mounting part, 311, shaft mounting hole, 312. conical air guide surface, 313. Round corner, 32. Intermediate ring portion, 321. Arc-shaped curved surface, 33. first drive blade, 34. second drive blade, 35. Internal duct of vane, 36. vane external duct

Claims (7)

The outer casing duct (21) is molded inside the fan outer casing (2), and includes a drive motor (1), a fan outer casing (2), and a fan blade (3). 3) is located in the front end air supply port of the outer casing duct (21), the drive motor (1) is provided in the outer casing (2) of the fan,
The fan blade (3) is provided with a shaft attachment part (31) and a blade group, and a shaft attachment hole (311) is opened at the middle position of the shaft attachment part (31). A twin charger high wind speed fan that is fastened to the power output shaft of the drive motor (1) through the shaft mounting hole (311),
The outer casing (2) of the fan includes a cylindrical wall (22) of the cylindrical outer casing. A spherical part (23) is provided coaxially with the cylindrical wall (22) of the outer casing. The drive motor (1) is fastened to the motor fixing part (24), and the power output shaft of the drive motor (1) is attached to the spherical part (23) via a bearing. , the fan blade (3) is located on the front end side of the spherical part (23),
The outer wall of the spherical part (23) is a spherical surface, and the part of the outer casing duct (21) located between the spherical part (23) and the cylindrical wall (22) of the outer casing gradually curves from front to back. It has a neck shape that becomes smaller,
The fan blade (3) is ring-shaped and further includes an intermediate ring part (32) located on the outer periphery of the shaft attachment part (31), and the intermediate ring part (32) and the shaft attachment part (31) are coaxial. The blade groups are spaced apart and include a first blade group and a second blade group, the first blade group being between the shaft attachment part (31) and the inner wall of the intermediate ring part (32). The first blade group includes a plurality of first drive blades (33) distributed in a ring-shaped array on the outer wall of the intermediate ring portion (32), and the first blade group includes a plurality of first drive blades (33) distributed in a ring-shaped array on the outer wall of the intermediate ring portion (32). It includes two driving blades (34), the shaft attachment part (31), the intermediate ring part (32), the first blade group, and the second blade group are of an integrated structure,
The shaft mounting portion (31) has a truncated conical shape with a small diameter at the front end and a large diameter at the rear end, and the side wall of the shaft mounting portion (31) has a conical air guide surface (312) having a conical shape. ), and the inner wall of the intermediate ring portion (32) has a flared shape that gradually increases in size from front to rear, and the inner wall of the intermediate ring portion (32) is flared so as to gradually increase in size from front to rear. The passage between (32) and the inner wall is an internal duct (35) of the vane, and the internal duct (35) of the vane has a flared shape that gradually increases in size from the back to the front.
The passage between the outer wall of the intermediate ring part (32) and the cylindrical wall (22) of the outer housing is the outer duct (36) of the vane, which gradually extends from the back to the front. A twin-charger high-speed fan characterized by a flared shape that increases in size. The thickness value of the middle part of the intermediate ring part (32) is larger than the thickness value of both ends, and the front end of the outer wall and the front end of the inner wall directly transition through the arc-shaped curved surface (321). The twin-charger high-speed fan according to claim 1, characterized in that: The front end of the shaft attachment 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 surface of the shaft attachment part (31) are The twin-charger high-speed fan according to claim 1, characterized in that the round corner transitions through (313). The motor fixing part (24) includes a plurality of motor fixing plates (241) distributed like a ring-shaped array and each having an arc shape, and the front end of each motor fixing plate (241) is connected to the spherical part. and the housing of the drive motor (1) is tightened and fixed via a motor fixing plate (241),
A positioning heat dissipation gap (242) communicating with the outer casing duct (21) is formed between two adjacent motor fixing plates (241). (11) are provided corresponding to each positioning heat radiation gap (242), and each outer casing protrusion (11) is installed in a corresponding positioning heat radiation gap (242), respectively. Twincharger high speed fan described in . An outer casing rib plate (25) is provided between each motor fixing plate (241) and the cylindrical wall (22) of the outer casing, and all the outer casing rib plates (25) are arranged in a ring-shaped array. The spherical portion (23), the motor fixing plate (241), the outer casing rib plate (25), and the cylindrical wall (22) of the outer casing have an integrated structure. The twin charger high speed fan described in 4. The twin-charger high-speed fan according to claim 1, characterized in that the fan blade (3) is an integral metal member or an integral plastic member. The twin-charger high-speed fan 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. .