A two-stage gradient fan impeller and a car seat fan with the same

Abstract

The utility model discloses a two-stage gradually changed fan impeller and automobile seat fan with it, including impeller main part, impeller main part includes the wheel hub and annular extension part in center, and the annular extension part is equipped with a plurality of fan blade along the wheel hub circumference, and the fan blade includes first guide vane and second guide vane, and the first guide vane is equipped with first guide inclined plane to the wheel hub one side, and the second guide vane is equipped with second guide inclined plane to the wheel hub one side, and the first guide inclined plane close to the site of telecentric end and the site of second guide inclined plane close to the telecentric end are opposite wheel hub center axle L and are located on different circumferential radius respectively, and the first guide inclined plane close to the site of near heart end and the site of second guide inclined plane close to the near heart end are opposite wheel hub center axle L and are located on the same circumferential radius. Have the effect of reducing the noise, promote the outflow.

Description

Technical Field

[0001] This utility model relates to the field of automotive fan technology, and in particular to a two-stage gradient fan impeller and an automotive seat fan having the same. Background Technology

[0002] When driving in the summer, the areas of car seats that come into contact with the human body often have difficulty dissipating heat, which can easily lead to stuffiness. To address this, some cars now have fans installed on the seats to circulate air and remove heat and moisture from the seat surface, keeping the contact areas dry and comfortable.

[0003] In existing technologies, some fans are designed as centrifugal fans. These centrifugal fans have an impeller and a shroud housing. The impeller has multiple blades, and the shroud housing has an air outlet channel. When the blades of the impeller pass through the air outlet channel, since the blades are all the same length and the distance between each blade and the throat is fixed, a fixed frequency of airflow noise is generated. However, continuous fixed-frequency noise can easily accumulate and create a noise peak, causing discomfort to the user. In addition, modern car seats integrate a large number of functions, which, while making them more intelligent, also requires higher efficiency and generates higher temperatures. As a result, the motor speed in the fan is constantly increasing. Although a higher motor speed can increase the air volume of the fan, a higher speed fan is also accompanied by greater noise, causing user discomfort and affecting the driving safety of the driver. Utility Model Content

[0004] The purpose of this invention is to provide a two-stage gradient fan impeller and a car seat fan with the same, which has the effects of reducing noise and increasing air volume.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a two-stage gradient fan impeller, including an impeller body, the impeller body including a hub located at the center and an annular extension extending radially outward along the edge of the hub, the annular extension having a plurality of fan blades arranged circumferentially along the hub, the fan blades including a first guide vane and a second guide vane, the plurality of first guide vanes and second guide vanes being alternately spaced on the annular extension;

[0006] The impeller body includes a proximal end near the hub and a distal end away from the hub. The first guide vane has a first guide slope on the side facing the hub, and the second guide vane has a second guide slope on the side facing the hub. The positions of the first guide slope near the distal end and the positions of the second guide slope near the distal end are located on different circumferential radii relative to the hub central axis L, respectively. The positions of the first guide slope near the proximal end and the positions of the second guide slope near the proximal end are located on the same circumferential radius relative to the hub central axis L.

[0007] By adopting the above technical solution, when the impeller body rotates, the first guide vane and the second guide vane alternate at the air outlet channel of the wind shroud housing. Due to the different opening angles of the first guide slope and the second guide slope, the effective air guiding area of ​​the first guide vane and the second guide vane is different, which leads to the periodic change of the air volume at the air outlet channel position, thereby preventing the generation of fixed frequency airflow noise and having the effect of reducing noise and increasing air volume.

[0008] A further feature of this invention is that the second guide slope includes a proximal guide section and a distal guide section, wherein the inclination angle θ of the proximal guide section relative to the hub center axis L is greater than the inclination angle φ of the distal guide section relative to the hub center axis L.

[0009] A further feature of this invention is that the vertical distance between the distal guide section and the hub center axis L gradually increases from the side closer to the annular extension to the side farther away from the annular extension, and the vertical distance between the second guide slope and the hub center axis L gradually increases from the side closer to the annular extension to the side farther away from the annular extension.

[0010] A further feature of this invention is that a plurality of the first guide vanes and the second guide vanes are arranged perpendicularly to the annular extension, and both the first guide vanes and the second guide vanes are configured as arc-shaped fan blades.

[0011] By adopting the above technical solution, the first and second guide vanes with arc-shaped fan blades can generate greater air guiding efficiency, which is conducive to more powerfully throwing the airflow between the first and second guide vanes radially out through centrifugal force, thereby improving the air outlet speed.

[0012] A further feature of this invention is that the first guide vane and the second guide vane are fixedly connected on the side away from the annular extension via an annular ring portion.

[0013] A further feature of this invention is that the first guide vane and the second guide vane extend from one side of the distal end relative to the annular extension, and the first guide vane and the second guide vane are flush with the edge of the annular portion on one side of the distal end.

[0014] A further feature of this invention is that an air intake channel is formed between the first guide vane and the hub, and between the second guide vane and the hub, and a heat dissipation hole is provided on the hub.

[0015] This utility model provides an automotive seat fan, including a fan housing, the fan housing having a duct chamber, an air inlet and an air outlet communicating with the duct chamber, a driving device being provided in the duct chamber, and a two-stage gradient fan impeller being provided in the duct chamber, the driving device driving the impeller body to rotate through an output shaft.

[0016] By adopting the above technical solution, when the driving device drives the impeller body to rotate, the airflow is thrown out through the gap between the first guide vane and the second guide vane. By utilizing the difference in centrifugal force between the first guide vane and the second guide vane, airflow of different discharge volumes can be periodically discharged from the air outlet, effectively preventing fixed frequency airflow noise from being generated at the connection between the air duct chamber and the air outlet.

[0017] A further feature of this invention is that the fan housing is provided with a Type-C interface, and a control motherboard electrically connected to the Type-C interface is provided inside the fan housing.

[0018] By adopting the above technical solutions, the Type-C interface has low cost, small interface space occupation, and is also easy to use.

[0019] A further feature of this invention is that the wind shield housing includes a bushing portion, the output shaft is floatingly connected within the bushing portion, and the bushing portion and the output shaft are rotatably connected via a bearing. A spring is sleeved on the output shaft, one end of the spring elastically abuts against the inner ring of the bearing, and the other end of the spring elastically abuts against the hub. An anti-disengagement component is provided at the end of the output shaft away from the spring, and the output shaft is anti-disengaged from the bearing through the anti-disengagement component.

[0020] By adopting the above technical solution, the impeller body is floatingly connected to the fan housing via the output shaft, and the impeller body is buffered and damped in the axial direction of the output shaft by the spring. At the same time, the anti-detachment component is used to prevent the output shaft from detaching from the bearing.

[0021] In summary, this utility model has the following beneficial effects:

[0022] A plurality of first and second guide vanes are arranged around the hub of the impeller body. The first guide vanes have a first guide slope facing the hub, and the second guide vanes have a second guide slope facing the hub. The points of the first guide slope closest to the distal end and the points of the second guide slope closest to the distal end are located on different circumferential radii relative to the hub central axis L, while the points of the first guide slope closest to the proximal end and the points of the second guide slope closest to the proximal end are located on the same circumferential radius relative to the hub central axis L. When the impeller body rotates, the first and second guide vanes alternate at the air outlet channel of the wind shroud. Due to the different opening angles of the first and second guide slopes, the effective air guiding areas of the first and second guide vanes are different, which leads to a periodic change in the air volume at the air outlet channel position. This prevents the generation of fixed-frequency airflow noise and has the effect of reducing noise and increasing air volume. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the impeller body of this utility model.

[0024] Figure 2 This is a utility model Figure 1 A magnified view of a portion of region A in the middle.

[0025] Figure 3 This is a utility model Figure 1 Another perspective.

[0026] Figure 4 This is a side view of the impeller body of this utility model.

[0027] Figure 5 This is a utility model Figure 4 A sectional view of section BB in the middle.

[0028] Figure 6 This is a utility model Figure 5 A magnified view of a portion of region C.

[0029] Figure 7 This is a cross-sectional view of the impeller body of this utility model at the position of the second guide vane, wherein L'

[0030] It is a line parallel to the center axis L of the wheel hub.

[0031] Figure 8 This is a structural diagram of a car seat fan with an impeller installed according to this utility model.

[0032] Figure 9 This is a utility model Figure 8 A longitudinal sectional view.

[0033] Figure 10 This is a utility model Figure 8Exploded view.

[0034] In the diagram: 1. Impeller body; 11. Hub; 111. Heat dissipation hole; 12. Annular extension; 13. Exhaust gap; 14. Annular ring; 15. Air inlet channel; 2. Fan blade; 21. First guide vane; 211. First guide slope; 22. Second guide vane; 221. Second guide slope; 2211. Proximal guide section; 2212. Distal guide section; 3. Fan cover housing; 31. Air duct chamber; 32. Air inlet; 33. Air outlet; 34. Shaft sleeve; 35. Bearing; 36. Type-C interface; 37. Control motherboard; 4. Drive device; 41. Output shaft; 411. Anti-detachment component; 5. Spring. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] A two-stage gradient fan impeller, such as Figures 1-6As shown, the impeller body 1 includes a hub 11 located at the center and an annular extension 12 extending radially outward along the edge of the hub 11. A plurality of fan blades 2 are arranged circumferentially on the annular extension 12 along the hub 11. Each fan blade 2 includes a first guide vane 21 and a second guide vane 22. The plurality of first guide vanes 21 and second guide vanes 22 are alternately spaced on the annular extension 12, and an exhaust gap 13 is formed between adjacent first guide vanes 21 and second guide vanes 22. The impeller body 1 includes a proximal end near the hub 11 and a distal end away from the hub 11. The opening of the exhaust gap 13 is located near the hub 11. The impeller gradually increases in size from the proximal end towards the distal end. The first guide vane 21 has a first guide slope 211 facing the hub 11, and the second guide vane 22 has a second guide slope 221 facing the hub 11. The points of the first guide slope 211 closest to the distal end and the points of the second guide slope 221 closest to the distal end are located on different circumferential radii relative to the central axis L of the hub 11. The points of the first guide slope 211 closest to the proximal end and the points of the second guide slope 221 closest to the proximal end are located on the same circumferential radius relative to the central axis L of the hub 11. Furthermore, the impeller body 1 and... On the same cross section perpendicular to the central axis L of the hub 11, the vertical distance between the section point a of the first guide slope 211 and the central axis L of the hub 11 is less than the vertical distance between the section point b of the second guide slope 221 and the central axis L of the hub 11; several first guide vanes 21 and second guide vanes 22 are arranged perpendicularly to the annular extension 12, and both the first guide vanes 21 and the second guide vanes 22 are set as arc-shaped fan blades 2. The arc-shaped fan blades 2 of the first guide vanes 21 and the second guide vanes 22 can generate greater air guiding efficiency, which is beneficial for the first guide vanes 21 and the second guide vanes 22 to be directed. The airflow between the blades 22 is more powerfully thrown radially by centrifugal force, thereby increasing the air outlet speed; an air inlet channel 15 is formed between the first guide blade 21 and the hub 11, and between the second guide blade 22 and the hub 11, and a heat dissipation hole 111 is provided on the hub 11; the sides of the first guide blade 21 and the second guide blade 22 away from the annular extension 12 are fixedly connected by the annular ring portion 14; the side of the first guide blade 21 and the second guide blade 22 located at the distal end extends relative to the annular extension 12, and the side of the first guide blade 21 and the second guide blade 22 located at the distal end is flush with the edge of the annular ring portion 14.

[0037] like Figures 1-7As shown, the second guide slope 221 includes a proximal guide section 2211 and a distal guide section 2212. The inclination angle θ of the proximal guide section 2211 relative to the central axis L of the hub 11 is greater than the inclination angle φ of the distal guide section 2212 relative to the central axis L of the hub 11. In this embodiment, the inclination angle θ is set to 90°, and the inclination angle φ is set to a range of 25-45°. In this embodiment, the inclination angle φ is set to 28°. The vertical distance between the distal guide section 2212 and the central axis L of the hub 11 gradually increases from the side closer to the annular extension 12 to the side farther away from the annular extension 12. The vertical distance between the second guide slope 221 and the central axis L of the hub 11 gradually increases from the side closer to the annular extension 12 to the side farther away from the annular extension 12.

[0038] The basic working principle of this utility model is as follows: A plurality of first guide vanes 21 and second guide vanes 22 are arranged around the hub 11 of the impeller body 1. The first guide vanes 21 have a first guide slope 211 facing the hub 11, and the second guide vanes 22 have a second guide slope 221 facing the hub 11. The points of the first guide slope 211 closest to the distal end and the points of the second guide slope 221 closest to the distal end are located on different circumferential radii relative to the central axis L of the hub 11. The points of the first guide slope 211 closest to the proximal end and the points of the second guide slope 221 closest to the proximal end are located on different circumferential radii relative to the central axis L of the hub 11. The point closest to the proximal end of surface 221 is located on the same circumference relative to the central axis L of hub 11. When the impeller body 1 rotates, the first guide vane 21 and the second guide vane 22 alternate at the air outlet channel of the wind cover housing 3. Due to the different opening angles of the first guide slope 211 and the second guide slope 221, the effective air guiding area of ​​the first guide vane 21 and the second guide vane 22 is different, which leads to the periodic change of the air volume at the air outlet channel position, thereby preventing the generation of fixed frequency airflow noise and having the effect of reducing noise and increasing air volume.

[0039] This utility model provides a car seat fan, such as Figures 8-10As shown, the device includes a fan housing 3, which has a duct chamber 31, an air inlet 32 ​​communicating with the duct chamber 31, and an air outlet 33. A drive device 4 is installed inside the duct chamber 31, and a two-stage gradient fan impeller is also installed within the duct chamber 31. The drive device 4 drives the impeller body 1 to rotate via an output shaft 41. When the drive device 4 drives the impeller body 1 to rotate, the airflow is thrown out through the gap between the first guide vane 21 and the second guide vane 22. Utilizing the difference in centrifugal force between the first guide vane 21 and the second guide vane 22, airflow of different discharge volumes can be periodically discharged from the air outlet 33, effectively preventing fixed-frequency airflow noise from occurring at the connection between the duct chamber 31 and the air outlet 33. The fan housing 3 is equipped with a Type-C interface 36, and the fan housing 3 contains an electrical connection to the Type-C interface 36. The control motherboard 37 and Type-C interface 36 are low-cost, occupy little space, and are easy to use. The fan housing 3 includes a bushing part 34, and the output shaft 41 is floatingly connected inside the bushing part 34. The bushing part 34 and the output shaft 41 are rotatably connected through the bearing 35. A spring 5 is sleeved on the output shaft 41. One end of the spring 5 elastically abuts against the inner ring of the bearing 35, and the other end of the spring 5 elastically abuts against the hub 11. An anti-detachment component 411 is provided at the end of the output shaft 41 away from the spring 5. The output shaft 41 is anti-detached from the bearing 35 through the anti-detachment component 411, so that the impeller body 1 is floatingly connected to the fan housing 3 through the output shaft 41. The spring 5 realizes the buffering and shock absorption of the impeller body 1 in the axial direction of the output shaft 41. At the same time, the anti-detachment component 411 prevents the output shaft 41 from detaching from the bearing 35.

[0040] The above are merely preferred embodiments of this utility model. Therefore, all equivalent changes or modifications made in accordance with the structure, features and principles of this utility model patent application are included within the scope of this utility model patent application.

Claims

1. A two-stage gradient fan impeller, comprising an impeller body (1), characterized in that: The impeller body (1) includes a hub (11) located at the center and an annular extension (12) extending radially outward along the edge of the hub (11). A plurality of fan blades (2) are provided on the annular extension (12) along the circumference of the hub (11). The fan blades (2) include a first guide vane (21) and a second guide vane (22). A plurality of the first guide vanes (21) and the second guide vanes (22) are alternately spaced on the annular extension (12). The impeller body (1) includes a proximal end near the hub (11) and a distal end away from the hub (11). The first guide vane (21) is provided with a first guide slope (211) on the side facing the hub (11), and the second guide vane (22) is provided with a second guide slope (221) on the side facing the hub (11). The position of the first guide slope (211) near the distal end and the position of the second guide slope (221) near the distal end are located on different circumferential radii relative to the central axis L of the hub (11). The position of the first guide slope (211) near the proximal end and the position of the second guide slope (221) near the proximal end are located on the same circumferential radius relative to the central axis L of the hub (11).

2. The two-stage gradient fan impeller according to claim 1, characterized in that: The second guide slope (221) includes a proximal guide section (2211) and a distal guide section (2212). The proximal guide section (2211) has an inclination angle θ relative to the central axis L of the hub (11) greater than the inclination angle φ of the distal guide section (2212) relative to the central axis L of the hub (11).

3. The two-stage gradient fan impeller according to claim 1, characterized in that: The vertical distance between the distal guide section (2212) and the central axis L of the hub (11) gradually increases from the side closer to the annular extension (12) toward the side farther away from the annular extension (12), and the vertical distance between the second guide slope (221) and the central axis L of the hub (11) gradually increases from the side closer to the annular extension (12) toward the side farther away from the annular extension (12).

4. The two-stage gradient fan impeller according to claim 1, characterized in that: A plurality of first guide vanes (21) and second guide vanes (22) are arranged perpendicularly to the annular extension (12), and both the first guide vanes (21) and the second guide vanes (22) are configured as arc-shaped fan blades (2).

5. A two-stage gradient fan impeller according to claim 1, characterized in that: The first guide vane (21) and the second guide vane (22) are fixedly connected on the side away from the annular extension (12) by an annular ring (14).

6. A two-stage gradient fan impeller according to claim 5, characterized in that: The first guide vane (21) and the second guide vane (22) extend from the distal end relative to the annular extension (12), and the first guide vane (21) and the second guide vane (22) are flush with the edge of the annular ring (14) on the distal end.

7. A two-stage gradient fan impeller according to claim 1, characterized in that: An air intake channel (15) is formed between the first guide vane (21) and the hub (11), and between the second guide vane (22) and the hub (11), and a heat dissipation hole (111) is provided on the hub (11).

8. A car seat fan, comprising a fan housing (3), the fan housing (3) having a duct chamber (31), an air inlet (32) communicating with the duct chamber (31), and an air outlet (33), wherein a drive device (4) is provided in the duct chamber (31), characterized in that: The air duct chamber (31) is provided with a two-stage gradient fan impeller as described in any one of claims 1-7, and the drive device (4) drives the impeller body (1) to rotate through the output shaft (41).

9. A car seat fan according to claim 8, characterized in that: The fan housing (3) is provided with a Type-C interface (36), and the fan housing (3) is provided with a control motherboard (37) electrically connected to the Type-C interface (36).

10. A car seat fan according to claim 8, characterized in that: The wind shield housing (3) includes a bushing part (34), the output shaft (41) is floatingly connected inside the bushing part (34), and the bushing part (34) and the output shaft (41) are rotatably connected by a bearing (35). A spring (5) is sleeved on the output shaft (41), one end of the spring (5) elastically abuts against the inner ring of the bearing (35), and the other end of the spring (5) elastically abuts against the hub (11). An anti-disengagement component (411) is provided at the end of the output shaft (41) away from the spring (5), and the output shaft (41) is anti-disengaged from the bearing (35) through the anti-disengagement component (411).

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