CN220646299U - Centrifugal fan and air duct machine - Google Patents
Centrifugal fan and air duct machine Download PDFInfo
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- CN220646299U CN220646299U CN202322287598.4U CN202322287598U CN220646299U CN 220646299 U CN220646299 U CN 220646299U CN 202322287598 U CN202322287598 U CN 202322287598U CN 220646299 U CN220646299 U CN 220646299U
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Abstract
The utility model relates to the technical field of air duct machines, and provides a centrifugal fan and an air duct machine, wherein the centrifugal fan comprises: the side part of the volute is provided with an air inlet; the induced air circle sets up in the air intake, and the inboard shape of induced air circle is circular, and the induced air circle is first cambered surface dorsad lateral surface of spiral case, and the induced air circle includes: the device comprises a first induced air part, a second induced air part and a third induced air part, wherein two ends of the first induced air part are correspondingly connected with two ends of the third induced air part through the second induced air part respectively, and the cambered surface area of the first induced air part is smaller than that of the third induced air part. The utility model can increase the air inlet quantity and reduce noise, thereby improving the use experience of users.
Description
Technical Field
The utility model relates to the technical field of air duct machines, in particular to a centrifugal fan and an air duct machine.
Background
In the related art, the inside of tuber pipe machine is equipped with centrifugal fan, carries out the air supply through centrifugal fan, but current centrifugal fan's wind field exists more turbulent flow, and the wind field is disordered, leads to the tuber pipe machine to appear comparatively serious aerodynamic noise easily to influence user's use experience.
Disclosure of Invention
The utility model provides a centrifugal fan and an air duct machine, which can increase the air inlet quantity and reduce noise, thereby improving the use experience of users.
The utility model provides a centrifugal fan, comprising:
the side part of the volute is provided with an air inlet;
the induced air circle, set up in the air intake, the inboard shape of induced air circle is circular, induced air circle dorsad the lateral surface of spiral case is first cambered surface, induced air circle includes: the device comprises a first induced draft part, a second induced draft part and a third induced draft part, wherein two ends of the first induced draft part are correspondingly connected with two ends of the third induced draft part respectively through the second induced draft part, and the cambered surface area of the first induced draft part is smaller than that of the third induced draft part.
According to the centrifugal fan provided by the utility model, the connecting part of the second air inducing part and the third air inducing part is a first inclined plane pointing to the circle center of the air inducing ring.
According to the centrifugal fan provided by the utility model, the centrifugal fan further comprises:
the centrifugal fan is rotatably arranged in the volute and positioned at the air inlet, and the circle center of the air guiding ring is positioned on the central axis of the centrifugal fan.
According to the present utility model, there is provided a centrifugal fan comprising:
the middle plate is provided with reinforcing rings at two opposite sides respectively, the shape of the middle plate and the shape of the reinforcing rings are circles with the same radius, and the connecting line of the circle center of the middle plate and the circle center of the reinforcing rings forms the central axis of the centrifugal fan;
the arc-shaped fan blades are connected between the middle disc and the reinforcing rings at two sides around the central shaft line of the centrifugal fan in a ring-cloth manner;
the arc-shaped fan blade comprises a first blade body and a second blade body which are connected, wherein the first blade body is positioned on one side close to the reinforcing ring, the second blade body is positioned on one side far away from the reinforcing ring, and the arc length of the first blade body is larger than that of the second blade body.
According to the centrifugal fan provided by the utility model, the distance from the connecting point of the first blade body and the second blade body to the central axis of the centrifugal fan is 0.85-0.9 times of the radius of the centrifugal fan, and the distance from the tail end of the second blade body to the central axis of the centrifugal fan is 0.75-0.85 times of the radius of the centrifugal fan.
According to the centrifugal fan provided by the utility model, the inlet angle of the first blade body is between 80 and 100 degrees, and the outlet angle is between 150 and 170 degrees.
According to the centrifugal fan provided by the utility model, the connecting line of the connecting point of the first blade body and the second blade body and the tail end of the second blade body is intersected with the central axis of the centrifugal fan.
According to the centrifugal fan provided by the utility model, the connection point of the first blade body and the second blade body is positioned in the covering range of the induced air ring.
According to the centrifugal fan provided by the utility model, the outer side surface of the reinforcing ring is a second cambered surface, the end surface of the reinforcing ring, which is opposite to the middle plate, is a second inclined surface, the second inclined surface is connected with the second cambered surface, and the outer side of the second inclined surface is higher than the inner side of the second inclined surface.
The utility model also provides an air duct machine, comprising: the centrifugal fan.
According to the centrifugal fan and the air duct machine, the air guiding ring is arranged at the air inlet of the volute, the drainage effect can be achieved, the inner side of the air guiding ring is circular, the outer side of the air guiding ring is of a cambered surface design, the air guiding ring is divided into the first air guiding part, the second air guiding part and the third air guiding part, two ends of the first air guiding part are correspondingly connected with two ends of the third air guiding part through the second air guiding part respectively, the cambered surface area of the first air guiding part is smaller than that of the third air guiding part, the air inlet quantity can be increased, the air inlet distance of the air guiding ring is increased, the air inlet speed is reduced, noise is reduced, and therefore the use experience of a user is improved.
Drawings
In order to more clearly illustrate the utility model or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an air duct machine according to the present utility model;
FIG. 2 is a schematic diagram of a centrifugal fan according to the present utility model;
FIG. 3 is a second schematic diagram of a centrifugal fan according to the present utility model;
FIG. 4 is a schematic diagram of a centrifugal fan according to the present utility model;
FIG. 5 is a second schematic diagram of a centrifugal fan according to the present utility model;
fig. 6 is a partial enlarged view at a of fig. 5.
Reference numerals:
100: a housing; 101: an air inlet;
200: a centrifugal fan; 201: a volute; 2011: an air inlet; 2012: an air outlet;
202: an air guiding ring; 2021: a first cambered surface; 2022: a first induced draft portion;
2023: a second induced draft portion; 2024: a third induced draft portion; 2025: a first inclined surface;
203: a centrifugal fan; 2031: a middle plate; 2032: a reinforcing ring; 20321: a second cambered surface;
20322: a second inclined surface; 2033: arc-shaped fan blades; 20331: a first leaf body;
20332: and a second leaf body.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The centrifugal fan and the ducted air machine of the present utility model are described below with reference to fig. 1 to 6.
According to an embodiment of the first aspect of the present utility model, referring to fig. 1 to 3, the present utility model provides an air duct machine, which is a rear air intake machine, mainly including: a housing 100, a heat exchanger, and a plurality of centrifugal fans 200. Wherein, the rear side of the casing 100 is provided with an air inlet 101, the front side of the casing 100 is provided with an air outlet, the heat exchanger is arranged in the casing 100, the plurality of centrifugal fans 200 are arranged in the casing 100 side by side along the length direction of the casing 100, and the air inlets 2011 of the plurality of centrifugal fans 200 are communicated with the air inlet 101 at the rear side of the casing 100, and the air outlets 2012 of the plurality of centrifugal fans 200 face the heat exchanger.
When the air pipe machine works, indoor air is sucked in through the air inlet 101 at the rear side of the machine shell 100 by the centrifugal fan 200 and blown to the heat exchanger, and the air subjected to heat exchange is discharged into a room through the air outlet at the front side of the machine shell 100, so that the aim of adjusting the indoor temperature is fulfilled.
According to an embodiment of the second aspect of the present utility model, referring to fig. 1 to 6, the present utility model further provides a centrifugal fan 200, mainly comprising: volute 201 and induced draft ring 202. Wherein, the side of the volute 201 is provided with an air inlet 2011, and the end of the volute 201 is provided with an air outlet 2012; the wind-guiding ring 202 is disposed at the air inlet 2011 of the volute 201, the inner side of the wind-guiding ring 202 is circular, the outer side of the wind-guiding ring 202 facing away from the volute 201 is a first cambered surface 2021, and the wind-guiding ring 202 comprises: the first air guiding portion 2022, the second air guiding portion 2023 and the third air guiding portion 2024, two ends of the first air guiding portion 2022 are respectively connected with two ends of the third air guiding portion 2024 through the second air guiding portion 2023, and the cambered surface area of the first air guiding portion 2022 is smaller than that of the third air guiding portion 2024.
Specifically, as shown in fig. 1-3, since the ducted air conditioner is a back air intake machine, and the air outlet 2012 of the centrifugal fan 200 needs to face the heat exchanger, when the centrifugal fan 200 is installed, the first air guiding portion 2022 of the air guiding ring 202 is located at the inner side of the ducted air conditioner away from the air inlet 101, the air intake of the first air guiding portion 2022 is relatively small, and accordingly, the cambered surface of the first air guiding portion 2022 is designed to be a small area, so that the effects of reducing wind pressure and noise can be achieved; the second air guiding part 2023 mainly plays a role in bearing transition, and as the upper second air guiding part 2023 corresponds to the volute pressurizing section and the lower second air guiding part 2023 corresponds to the volute diffusing section, the two second air guiding parts 2023 are arranged up and down to play a role in fixing flow, preventing air from losing from the upper second air guiding part 2023 and guaranteeing air inlet quantity; the third induced air portion 2024 is located outside that the tuber pipe machine is close to air inlet 101, and the intake of third induced air portion 2024 is great relatively, and third induced air portion 2024 is centrifugal fan's main induced air portion, correspondingly, designs the cambered surface of third induced air portion 2024 into great area, can increase the intake, increases the air inlet distance of induced air circle 202, reduces the air inlet wind speed, reduces the noise to improve user's use experience.
According to an embodiment of the present utility model, referring to fig. 3, the connection between the second air guiding portion 2023 and the third air guiding portion 2024 is a first inclined plane 2025 pointing to the center of the air guiding ring 202. By the design, the air inlet into the centrifugal fan 200 can be more uniform.
According to one embodiment of the present utility model, referring to fig. 2 and 4, the centrifugal fan 200 further includes: the centrifugal fan 203, the centrifugal fan 203 is rotatably disposed in the volute 201 and is located at the air inlet 2011, and the center of the induced air ring 202 is located on the central axis of the centrifugal fan 203.
Specifically, the centrifugal fan 200 further includes a motor, a rotating shaft of the motor is connected to the centrifugal fan 203, and drives the centrifugal fan 203 to rotate, so that air is sucked into the volute 201 through the air inlet 2011 of the volute 201 and is discharged through the air outlet 2012 of the volute 201. Wherein the rotating shaft of the motor is coaxially arranged with the central axis of the centrifugal fan 203.
According to an embodiment of the present utility model, referring to fig. 4 to 6, the centrifugal fan 203 mainly includes: a central plate 2031, a stiffening ring 2032, and a plurality of arcuate blades 2033. Wherein, reinforcing rings 2032 are respectively arranged on the left and right opposite sides of the middle disc 2031, the shape of the middle disc 2031 and the shape of the reinforcing rings 2032 are circles with the same radius, and the connecting line of the circle center of the middle disc 2031 and the circle center of the reinforcing rings 2032 forms the central axis of the centrifugal fan 203, and accordingly, the radius of the centrifugal fan 203 is the radius of the middle disc 2031 or the reinforcing rings 2032; a plurality of arc-shaped blades 2033 are connected between the middle disk 2031 and the reinforcing rings 2032 on both sides around the central axis of the centrifugal fan 203 in a ring-shaped manner; the arc-shaped fan blade 2033 comprises a first blade 20331 and a second blade 20332 which are connected, the first blade 20331 is located on one side close to the reinforcing ring 2032, the second blade 20332 is located on one side far away from the reinforcing ring 2032, and the arc length of the first blade 20331 is longer than that of the second blade 20332.
In the embodiment of the utility model, the fixed assembly of the arc-shaped fan blades 2033 can be realized through the middle disc 2031 and the reinforcing ring 2032, and the rotating shaft of the motor can be connected with the middle disc 2031 so as to drive the whole centrifugal fan 203 to rotate; and by designing the arc-shaped fan blades 2033 into sectional blades with different arc lengths, the arc length of the first blade 20331 is longer than that of the second blade 20332, so that the centrifugal fan 203 can provide enough air quantity and keep a low noise level.
According to an embodiment of the present utility model, referring to fig. 5, a distance L1 from a connection point B of the first blade 20331 and the second blade 20332 to a central axis C of the centrifugal fan 203 is 0.85 to 0.9 times a radius R of the centrifugal fan, and a distance L2 from an end D of the second blade 20332 to the central axis C of the centrifugal fan 203 is 0.75 to 0.85 times the radius R of the centrifugal fan. So designed, the noise reduction effect can be ensured.
According to one embodiment of the present utility model, referring to fig. 6, the inlet angle M of the first leaf 20331 is between 80 ° and 100 °, and the outlet angle N is between 150 ° and 170 °. The inlet angle M is an included angle formed by a tangent line of an outer end arc of the first blade 20331 and a tangent line of a first circle, and the first circle is a circle formed by connecting the outer ends of the plurality of first blades 20331; the outlet angle N is an included angle formed by a tangent line of an inner end arc of the first blade 20331 and a tangent line of a second circle, and the second circle is a circle formed by connecting inner ends of the first blades 20331.
According to the embodiment of the utility model, through reasonably optimizing the inlet angle and the outlet angle of the first blade 20331, larger air inlet quantity can be provided, and the centrifugal fan 203 has better aerodynamic performance and static pressure resistance.
According to an embodiment of the present utility model, referring to fig. 5, a connection line between a connection point B of the first blade 20331 and the second blade 20332 and a terminal D of the second blade 20332 intersect with a central axis C of the centrifugal fan 203, so that it is ensured that the centripetal force of the arc-shaped fan blade 2033 is minimum during the rotation of the centrifugal fan 203, thereby reducing the wind pressure generated during the rotation of the centrifugal fan 203, adapting to the environment with high static pressure, and improving the efficiency of the centrifugal fan 203.
According to an embodiment of the present utility model, the connection point B between the first blade 20331 and the second blade 20332 is located within the coverage range of the air guiding ring 202, so that the air guiding ring 202 can protect the arc-shaped fan blades 2033 as much as possible, reduce the wind pressure as much as possible, and improve the operation capability and efficiency of the whole centrifugal fan 200 under the condition of high static pressure.
According to an embodiment of the present utility model, referring to fig. 6, the outer side surface of the reinforcing ring 2032 is a second arc surface 20321, the end surface of the reinforcing ring 2032 facing away from the middle disk 2031 is a second inclined surface 20322, the second inclined surface 20322 is connected with the second arc surface 20321, and the outer side of the second inclined surface 20322 is higher than the inner side, it is understood that the outer side of the second inclined surface 20322 is the side connected with the second arc surface 20321, and the inner side of the second inclined surface 20322 is the side connected with the first blade body 20331 of the arc blade 2033.
According to the embodiment of the utility model, the outer side surface of the reinforcing ring 2032 is designed to be circular arc, and the end surface is designed to be an inclined surface, so that the design can be beneficial to noise reduction and drainage of the centrifugal fan 203 and the air inlet quantity is improved.
In order to improve the static pressure resistance of the centrifugal fan 203, the reinforcing rings 2032 on both sides of the centrifugal fan 203 may be designed, for example: the radial thickness of the reinforcing ring 2032 may be set to be 5% or more of the diameter of the centrifugal fan 203 to prevent deformation of both ends of the centrifugal fan 203 under high wind pressure, and the thicker reinforcing ring 2032 may make the centrifugal fan 203 fuller during injection molding, thereby improving the strength of the centrifugal fan 203 and the stability of the centrifugal fan 203 during operation; and the axial height of the reinforcing ring 2032 can be set to be about 3% of the overall height of the centrifugal fan 203, so that the shielding of the reinforcing ring 2032 to the arc-shaped fan blades 2033 can be reduced to the greatest extent, and the air quantity loss is reduced.
In summary, the centrifugal fan provided by the utility model can improve the aerodynamic performance under high static pressure, improve the air intake, reduce noise and improve the use experience of users.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A centrifugal fan, comprising:
the side part of the volute is provided with an air inlet;
the induced air circle, set up in the air intake, the inboard shape of induced air circle is circular, induced air circle dorsad the lateral surface of spiral case is first cambered surface, induced air circle includes: the device comprises a first induced draft part, a second induced draft part and a third induced draft part, wherein two ends of the first induced draft part are correspondingly connected with two ends of the third induced draft part respectively through the second induced draft part, and the cambered surface area of the first induced draft part is smaller than that of the third induced draft part.
2. The centrifugal fan according to claim 1, wherein the connection part of the second air guiding part and the third air guiding part is a first inclined plane pointing to the center of the air guiding ring.
3. The centrifugal fan of claim 1, further comprising:
the centrifugal fan is rotatably arranged in the volute and positioned at the air inlet, and the circle center of the air guiding ring is positioned on the central axis of the centrifugal fan.
4. A centrifugal fan according to claim 3, wherein the centrifugal fan comprises:
the middle plate is provided with reinforcing rings at two opposite sides respectively, the shape of the middle plate and the shape of the reinforcing rings are circles with the same radius, and the connecting line of the circle center of the middle plate and the circle center of the reinforcing rings forms the central axis of the centrifugal fan;
the arc-shaped fan blades are connected between the middle disc and the reinforcing rings at two sides around the central shaft line of the centrifugal fan in a ring-cloth manner;
the arc-shaped fan blade comprises a first blade body and a second blade body which are connected, wherein the first blade body is positioned on one side close to the reinforcing ring, the second blade body is positioned on one side far away from the reinforcing ring, and the arc length of the first blade body is larger than that of the second blade body.
5. The centrifugal fan according to claim 4, wherein a distance from a connection point of the first blade body and the second blade body to a central axis of the centrifugal fan is 0.85 to 0.9 times a radius of the centrifugal fan, and a distance from an end of the second blade body to the central axis of the centrifugal fan is 0.75 to 0.85 times the radius of the centrifugal fan.
6. The centrifugal fan of claim 4, wherein the inlet angle of the first blade body is between 80 ° and 100 ° and the outlet angle is between 150 ° and 170 °.
7. The centrifugal fan of claim 4, wherein a line connecting a point of the first blade body and the second blade body with a tip end of the second blade body intersects a central axis of the centrifugal fan.
8. The centrifugal fan of claim 4, wherein the connection point of the first blade body and the second blade body is located within a coverage range of the induced draft ring.
9. The centrifugal fan according to any one of claims 4 to 8, wherein the outer side surface of the reinforcing ring is a second cambered surface, the end surface of the reinforcing ring facing away from the middle plate is a second inclined surface, the second inclined surface is connected with the second cambered surface, and the outer side of the second inclined surface is higher than the inner side.
10. An air duct machine, comprising: the centrifugal fan of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322287598.4U CN220646299U (en) | 2023-08-24 | 2023-08-24 | Centrifugal fan and air duct machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322287598.4U CN220646299U (en) | 2023-08-24 | 2023-08-24 | Centrifugal fan and air duct machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220646299U true CN220646299U (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322287598.4U Active CN220646299U (en) | 2023-08-24 | 2023-08-24 | Centrifugal fan and air duct machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220646299U (en) |
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2023
- 2023-08-24 CN CN202322287598.4U patent/CN220646299U/en active Active
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