Flow guide device and fan

Abstract

The utility model relates to a flow guiding device and a fan, the flow guiding device comprises a flow guiding wheel and a cover plate, the flow guiding wheel comprises a cylindrical support and a base plate, and the base plate is connected with the cylindrical support; a first air duct is arranged on the lower surface of the base plate, and a first air outlet is formed in one end of the first air duct; the first air outlet is configured to enable air output from the first outlet through a first air duct to be output towards the cylinder wall; a second air duct is arranged on the upper surface of the base plate, a second air outlet is formed in one end of the second air duct, and the second air outlet is configured to enable air output from a second outlet through the second air duct to be output back to the cylinder wall; a first air outlet of the first air duct is communicated with the other end of the second air duct through a gap between the base plate and the cylinder wall; the cover plate is arranged above the second air duct and blocks the second air duct from the upper portion. According to the flow guide device and the fan, noise generated when the fan runs can be reduced.

Description

Technical Field

[0001] This utility model relates to a flow guiding device and a fan. Background Technology

[0002] Fans have a wide range of applications in household appliances and other fields, and they are also an important power system for appliances such as vacuum cleaners and floor scrubbers. After years of development, fan technology is relatively mature, and product design is highly standardized. However, with the improvement of people's living standards and production requirements, there is still a need for further improvement in some performance aspects of existing fans. For example, users prefer lower noise levels. However, reducing noise becomes increasingly difficult when operating at high power. Utility Model Content

[0003] One of the purposes of this utility model is to overcome the shortcomings of the prior art and provide a flow guiding device and fan with low noise during operation.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] The flow guiding device is characterized by comprising a flow guiding wheel and a cover plate, wherein the flow guiding wheel comprises:

[0006] A cylindrical support, comprising a bottom and a wall, the wall extending from and protruding beyond the bottom;

[0007] A substrate is disposed around the cylindrical wall and has a gap between it and the cylindrical wall; the substrate is connected to the cylindrical support.

[0008] The lower surface of the substrate is provided with a first air duct, and one end of the first air duct is provided with a first air outlet; the first air outlet is configured to output air from the first outlet through the first air duct toward the cylinder wall;

[0009] The upper surface of the substrate is provided with a second air duct, and one end of the second air duct is provided with a second air outlet. The second air outlet is configured to output air from the second outlet through the second air duct in the opposite direction to the cylinder wall.

[0010] The first air outlet of the first air duct is connected to the other end of the second air duct through the gap between the substrate and the cylinder wall;

[0011] The cover plate is positioned above the second air duct to block the second air duct from above.

[0012] According to one embodiment of the present invention, the guide wheel further includes:

[0013] Multiple lower guide vanes, one end of which is connected to the lower surface of the substrate and the other end extends toward the cylinder wall; the multiple lower guide vanes are distributed along the circumferential direction, and the space between two lower guide vanes is a first air duct.

[0014] According to one embodiment of the present invention, the guide wheel further includes:

[0015] A partition, which is attached to the substrate and protrudes from the lower surface of the substrate; the partition blocks the other end of the first air duct.

[0016] According to one embodiment of the present invention, one end of the lower guide vane is also connected to the enclosure plate.

[0017] According to one embodiment of the present invention, a plurality of upper guide vanes are provided, the inner end of which is connected to the cylinder wall and the outer end is connected to the upper surface of the substrate. The plurality of upper guide vanes are distributed along the circumferential direction, and a second air duct is formed between two upper guide vanes.

[0018] According to one embodiment of the present invention, the cover plate is placed on the upper end of the upper guide vane to block the second air duct from above.

[0019] According to one embodiment of the present invention, the lateral dimension of the first air duct is reduced along the extension direction of the lower guide vane from one end to the other.

[0020] According to one embodiment of the present invention, the lateral dimension of the second air duct is increased along the extension direction of the upper guide vane from the inner end to the outer end.

[0021] According to one embodiment of the present invention, an installation groove is further provided on the bottom of the cylinder, and the cylinder wall surrounds the installation groove and is spaced apart from the installation groove.

[0022] The fan specifically includes the aforementioned airflow guiding device.

[0023] The airflow guiding device and fan of this invention have a second air duct and a first air duct respectively provided on the upper and lower surfaces of the substrate. During the operation of the fan, air passes through the first and second air ducts before being output, which can reduce the noise of the fan during operation. When using the airflow guiding device of this invention, the noise of the fan at 24,000 rpm under a 7 / 8-inch perforated plate can be reduced from 84 decibels to 78 decibels. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the fan structure in this utility model.

[0025] Figure 2This is a schematic diagram of the fan component in this utility model.

[0026] Figure 3 This is a schematic diagram of the flow guiding device in this utility model.

[0027] Figure 4 This is a schematic diagram of the lower structure of the flow guiding device in this utility model.

[0028] Figure 5 This is a top view of the flow guiding device in this utility model.

[0029] Figure 6 This is a bottom view of the flow guiding device in this utility model. Detailed Implementation

[0030] like Figure 1 , Figure 2 As shown, the fan 100 includes a shroud 120, a flow guide device 110, a rotor 130, and a stator 140. A working fan blade 150 is disposed inside the shroud 120. The flow guide device 110 is mounted on the shroud 120. The rotor 130 passes through the flow guide device 110 and is connected to the working fan blade 150 inside the shroud 120. The stator 140 is disposed on the flow guide device 110 and surrounds the rotor 130. When the stator 140 is energized, it drives the rotor 130 to rotate. The rotation of the rotor 130 drives the working fan blade 150 to rotate. When the working fan blade 150 rotates, it draws air into the shroud 120 and then outputs it through the flow guide device 110.

[0031] like Figure 1 , Figures 3 to 6 As shown, the flow guiding device 110 includes a flow guiding wheel 135 and a cover plate 136. The flow guiding wheel 135 includes a cylindrical support 111, a base plate 114, a surrounding plate 118, a plurality of lower flow guiding blades 119 and a plurality of upper flow guiding blades 125.

[0032] The cylindrical support 111 includes a bottom 112 and a wall 113, the wall 113 extending from the bottom 112 and protruding from the bottom 112.

[0033] The substrate 114 has an upper surface 115 and a lower surface 116 opposite to the upper surface 115. The substrate 114 is disposed around the cylindrical wall 113 and a gap 117 is provided between the substrate 114 and the cylindrical wall 113.

[0034] One end 121 of the lower guide vane 119 is connected to the lower surface 116 of the substrate 114 and the surrounding plate 118, while the other end 122 extends freely toward the wall of the cylinder 113. Multiple lower guide vanes 119 are distributed circumferentially. The specific number of lower guide vanes 119 can be determined according to actual usage needs; in the example shown, there are eleven lower guide vanes 119. A first air duct 123 is formed between two lower guide vanes 119, and one end of the first air duct 123 has a first air outlet 124. The first air outlet 124 is configured such that air output from the first air outlet 124 through the first air duct 123 is directed toward the cylinder wall 113. Along the extension direction of the lower guide vane 119 from one end 121 to the other end 122, the lateral dimension of the first air duct 123 decreases.

[0035] The enclosure 118 is connected to the base plate 114 and protrudes from the lower surface 116 of the base plate 114. The enclosure 118 blocks the other end of the first air duct 123.

[0036] The inner end 126 of the upper guide vane 125 is connected to the cylinder wall 113, and the outer end 127 is connected to the upper surface 115 of the substrate 114. Multiple upper guide vanes 125 are distributed circumferentially, and a second air duct 128 is formed between two upper guide vanes 125. The second air duct 128 is provided with a second air outlet 129. The second air outlet 129 is positioned away from the cylinder wall 113. Along the extension direction of the upper guide vane 125 from the inner end 126 to the outer end 127, the lateral dimension of the second air duct 128 increases. The first air duct 123 and the second air duct 128 are connected through a gap 117 between the substrate 114 and the cylinder wall 113. A cover plate 136 is placed over the upper end of the upper guide vane 125, sealing the second air duct 128 from above.

[0037] A mounting groove 131 is also provided on the bottom 112 of the cylinder, and the cylinder wall 113 is arranged around the mounting groove 131 and spaced apart from the mounting groove 131. The mounting groove 131 is used to install the stator of the fan.

[0038] The airflow guiding device and fan of this invention have a second air duct and a first air duct respectively provided on the upper and lower surfaces of the substrate, which can reduce the noise of the fan during operation. When using the airflow guiding device of this invention, the noise of the fan at 24,000 rpm under a 7 / 8-inch perforated plate can be reduced from 84 decibels to 78 decibels.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A flow directing device, characterized in that The guide wheel comprises a guide wheel and a cover plate, and the guide wheel comprises: a cylindrical support comprising a cylindrical bottom and a cylindrical wall extending from the cylindrical bottom and protruding from the cylindrical bottom; a base plate arranged around the cylindrical wall with a gap between the base plate and the cylindrical wall, the base plate being connected to the cylindrical support; a lower surface of the base plate is provided with a first air duct, one end of the first air duct is provided with a first air outlet, the first air outlet is configured to output air from the first outlet through the first air duct towards the cylindrical wall; an upper surface of the base plate is provided with a second air duct, one end of the second air duct is provided with a second air outlet, the second air outlet is configured to output air from the second outlet through the second air duct away from the cylindrical wall; the first air outlet of the first air duct and the other end of the second air duct are in communication through the gap between the base plate and the cylindrical wall; the cover plate is arranged above the second air duct to block the second air duct from above.

2. The flow directing device of claim 1, wherein, The guide wheel further comprises: a plurality of lower guide vanes, one end of the lower guide vanes being connected to the lower surface of the base plate, the other end of the lower guide vanes extending towards the cylindrical wall, a plurality of the lower guide vanes being distributed in the circumferential direction, and the first air duct being between two of the lower guide vanes.

3. The flow directing device of claim 2, wherein, The guide wheel further comprises: a surrounding plate connected to the base plate and protruding from the lower surface of the base plate, the surrounding plate blocking the other end of the first air duct.

4. The flow directing device of claim 3, wherein One end of the lower guide vanes is also connected to the surrounding plate.

5. The flow directing device of claim 2, wherein, The transverse dimension of the first air duct decreases along the extension direction of the lower guide vanes from one end to the other end.

6. The flow directing device of claim 1, wherein, The guide wheel further comprises a plurality of upper guide vanes, the inner side end of the upper guide vanes being connected to the cylindrical wall, the outer side end of the upper guide vanes being connected to the upper surface of the base plate, a plurality of the upper guide vanes being distributed in the circumferential direction, and the second air duct being between two of the upper guide vanes.

7. The flow directing device of claim 6, wherein, The cover plate covers the upper end of the upper guide vanes to block the second air duct from above.

8. The flow directing device of claim 6, wherein, The transverse dimension of the second air duct increases along the extension direction of the upper guide vanes from the inner side end to the outer side end.

9. The flow directing device of claim 1, wherein, The cylindrical bottom is further provided with a mounting groove, and the cylindrical wall is arranged around the mounting groove and spaced apart from the mounting groove.

10. A fan characterised by The guide device comprises the guide device according to any one of claims 1 to 9.

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