CN216518822U - Fan for ventilation or air conditioning system - Google Patents
Fan for ventilation or air conditioning system Download PDFInfo
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- CN216518822U CN216518822U CN202123375513.5U CN202123375513U CN216518822U CN 216518822 U CN216518822 U CN 216518822U CN 202123375513 U CN202123375513 U CN 202123375513U CN 216518822 U CN216518822 U CN 216518822U
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Abstract
The utility model discloses a fan for a ventilation or air conditioning system, which comprises a centrifugal impeller and a shell, wherein the centrifugal impeller comprises a rear disc (1), a front disc (2), blades (3) and a hub (4), the blades are uniformly distributed along the circumferential direction and connected between the rear disc and the front disc, the hub is arranged on the inner circumferential side of the rear disc, and the fan is characterized in that: a first flow guide body (5) and a second flow guide body (6) are arranged on the rear disc (1) and on the upstream side of the front edge (31) of each blade, the first flow guide body and the second flow guide body are arc-shaped flow guide bodies, and the second flow guide body, the first flow guide body and the front edge are sequentially arranged at intervals along the radial direction. According to the utility model, through the design of the first guide body and the second guide body, the eddy loss of the front edge of the blade can be reduced, and the noise of the fan is reduced, so that the overall performance of the fan is improved.
Description
Technical Field
The utility model relates to the technical field of ventilation and air conditioning systems, in particular to a fan for a ventilation or air conditioning system.
Background
The existing fan for a ventilation or air conditioning system comprises a centrifugal impeller, a shell and a motor, wherein the centrifugal impeller is installed in a shell cavity of the shell and is connected with the motor through a rotating shaft, the centrifugal impeller comprises a rear disc, a front disc, blades and a hub, the blades are uniformly distributed in the circumferential direction and connected between the rear disc and the front disc, the hub is arranged on the inner circumferential side of the rear disc, auxiliary guide blades are arranged near the front edges of the blades, and the blades are equal-thickness arc-shaped blades or three-dimensional twisted blades. However, the existing fan has the problems of large eddy current loss and large noise of the front edge of the blade.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a fan for a ventilation or air conditioning system, which can reduce the eddy current loss of the front edge of a blade and reduce the noise of the fan through the design of a first guide body and a second guide body, thereby improving the overall performance of the fan.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a fan for ventilation or air conditioning system, its includes centrifugal impeller, casing, motor, and centrifugal impeller installs in the casing intracavity of casing, and centrifugal impeller is connected with the motor through the pivot, and centrifugal impeller includes back plate (1), front bezel (2), blade (3), wheel hub (4), and a plurality of blades are followed circumference evenly distributed and are connected between back plate and front bezel, and the interior periphery side of back plate is provided with wheel hub, its characterized in that: a first flow guide body (5) and a second flow guide body (6) are arranged on the rear disc (1) and on the upstream side of the front edge (31) of the blade, the first flow guide body and the second flow guide body are arc-shaped flow guide bodies, and the second flow guide body (6), the first flow guide body (5) and the front edge (31) are sequentially arranged at intervals along the radial direction.
Further, the extension range of the first flow guide body (5) along the circumferential direction is 160-; the arc radius of the first flow guiding body is larger than that of the second flow guiding body.
Further, the midpoint of the second flow conductor (6), the midpoint of the first flow conductor (5) and the midpoint of the leading edge (31) are located on the same radial line.
Furthermore, a first through hole (7) and a second through hole (8) are formed in the first flow guiding body (5), one end of each of the first through hole and the second through hole is communicated with a flow channel between the second flow guiding body and the first flow guiding body, and the other end of each of the first through hole and the second through hole is communicated with a flow channel between the first flow guiding body and the front edge.
Furthermore, the first through hole (7) and the second through hole (8) are symmetrically arranged, and the first through hole and the second through hole are obliquely arranged relative to the same radial line; the front edge (31) extends into a semi-closed space surrounded by the first flow guiding body (5).
Further, the blade (3) is an airfoil-shaped blade, and the thickness of the radial inner side end is larger than that of the radial outer side end.
Further, the axial height of the first flow guide body (5) and the second flow guide body (6) is 0.2-0.5 times of the axial height of the blade (3); the leading edge (31) of the blade is arranged obliquely with respect to the rear disc (1).
According to the fan for the ventilation or air conditioning system, the first flow guide body and the second flow guide body are designed, so that the eddy current loss of the front edge of the blade can be reduced, the noise of the fan is reduced, and the overall performance of the fan is improved.
Drawings
FIG. 1 is a schematic view of a fan wheel configuration for a ventilation or air conditioning system in accordance with the present invention;
FIG. 2 is a schematic view of a fan wheel configuration for a ventilation or air conditioning system in accordance with the present invention;
fig. 3 is a partially enlarged structural view of a fan wheel for a ventilation or air conditioning system according to the present invention.
In the figure: the rear disc 1, the front disc 2, the blades 3, the front edge 31, the hub 4, the first flow guide body 5, the second flow guide body 6, the first through hole 7 and the second through hole 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, a fan for ventilation or air conditioning system, it includes centrifugal impeller, casing, motor, centrifugal impeller installs in the casing intracavity of casing, and centrifugal impeller is connected with the motor through the pivot, and centrifugal impeller includes back plate 1, front bezel 2, blade 3, wheel hub 4, and a plurality of blades 3 are along circumference evenly distributed and connect between back plate 1 and front bezel 2, and the inner periphery side of back plate 1 is provided with wheel hub 4, its characterized in that: a first flow guiding body 5 and a second flow guiding body 6 are arranged on the rear disc 1 and on the upstream side of the front edge 31 of the blade 3, the first flow guiding body 5 and the second flow guiding body 6 are arc-shaped flow guiding bodies, and the second flow guiding body 6, the first flow guiding body 5 and the front edge 31 are sequentially arranged at intervals along the radial direction.
Further, the extension range of the first current carrier 5 along the circumferential direction is 180-; the extension of the second flow conductor 6 in the circumferential direction is 130-170 deg., preferably 150 deg.. The arc radius of the first current carrier 5 is larger than the arc radius of the second current carrier 6.
The midpoint of second flow conductor 6, the midpoint of first flow conductor 5, and the midpoint of leading edge 31 are located on the same radial line.
According to the fan for the ventilation or air conditioning system, the first guide body 5 and the second guide body 6 are designed, so that the eddy current loss of the front edge 31 of the blade 3 can be reduced, the noise of the fan is reduced, and the overall performance of the fan is improved.
Further, the first flow guiding body 5 is provided with a first through hole 7 and a second through hole 8, one end of the first through hole 7 and one end of the second through hole 8 are communicated with the flow channel between the second flow guiding body 6 and the first flow guiding body 5, and the other end is communicated with the flow channel between the first flow guiding body 5 and the front edge 31. The first through hole 7 and the second through hole 8 are symmetrically arranged, and the first through hole 7 and the second through hole 8 are obliquely arranged relative to the same radial line.
The leading edge 31 extends into the semi-enclosed space enclosed by the first flow conductor 5.
According to the fan for the ventilation or air conditioning system, the vortex loss of the front edge 31 of the blade 3 can be further reduced through the design of the first through hole 7 and the second through hole 8, the noise of the fan is reduced, and the overall performance of the fan is improved.
Further, the blade 3 is an airfoil blade, and the thickness of the radial inner end is greater than that of the radial outer end. The axial height of the first flow conductor 5, the second flow conductor 6 is 0.2-0.5 times, preferably 0.35 times the axial height of the blade 3. The leading edges 31 of the blades 3 are arranged obliquely with respect to the rear disc 1.
According to the fan for the ventilation or air conditioning system, the first flow guide body and the second flow guide body are designed, so that the eddy current loss of the front edge of the blade can be reduced, the noise of the fan is reduced, and the overall performance of the fan is improved.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.
Claims (7)
1. The utility model provides a fan for ventilation or air conditioning system, its includes centrifugal impeller, casing, motor, and centrifugal impeller installs in the casing intracavity of casing, and centrifugal impeller is connected with the motor through the pivot, and centrifugal impeller includes back plate (1), front bezel (2), blade (3), wheel hub (4), and a plurality of blades are followed circumference evenly distributed and are connected between back plate and front bezel, and the interior periphery side of back plate is provided with wheel hub, its characterized in that: a first flow guide body (5) and a second flow guide body (6) are arranged on the rear disc (1) and on the upstream side of the front edge (31) of the blade, the first flow guide body and the second flow guide body are arc-shaped flow guide bodies, and the second flow guide body (6), the first flow guide body (5) and the front edge (31) are sequentially arranged at intervals along the radial direction.
2. A fan for a ventilation or air-conditioning system according to claim 1, wherein the extension of the first flow conductor (5) in the circumferential direction is 160-230 °, and the extension of the second flow conductor (6) in the circumferential direction is 120-180 °; the arc radius of the first flow guiding body is larger than that of the second flow guiding body.
3. A fan for a ventilation or air-conditioning system according to claim 2, characterized in that the midpoint of the second flow conductor (6), the midpoint of the first flow conductor (5) and the midpoint of the leading edge (31) are located on the same radial line.
4. The fan for a ventilation or air conditioning system according to claim 3, wherein the first flow guiding body (5) is provided with a first through hole (7) and a second through hole (8), one end of the first through hole and one end of the second through hole are communicated with the flow channel between the second flow guiding body and the first flow guiding body, and the other end of the first through hole and the second through hole are communicated with the flow channel between the first flow guiding body and the front edge.
5. A fan for ventilation or air-conditioning systems according to claim 4, characterized in that said first (7) and second (8) through holes are arranged symmetrically and inclined with respect to the same radial line; the front edge (31) extends into a semi-closed space surrounded by the first flow guiding body (5).
6. Blower for ventilation or air-conditioning systems according to claim 5, characterised in that said blades (3) are airfoil-shaped blades, and in that the thickness of the radially inner end is greater than the thickness of the radially outer end.
7. The fan for ventilation or air-conditioning systems according to claim 6, characterized in that the axial height of said first and second flow conductors (5, 6) is between 0.2 and 0.5 times the axial height of the blades (3); the leading edge (31) of the blade is arranged obliquely with respect to the rear disc (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123375513.5U CN216518822U (en) | 2021-12-30 | 2021-12-30 | Fan for ventilation or air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123375513.5U CN216518822U (en) | 2021-12-30 | 2021-12-30 | Fan for ventilation or air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216518822U true CN216518822U (en) | 2022-05-13 |
Family
ID=81514625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123375513.5U Active CN216518822U (en) | 2021-12-30 | 2021-12-30 | Fan for ventilation or air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216518822U (en) |
-
2021
- 2021-12-30 CN CN202123375513.5U patent/CN216518822U/en active Active
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