CN211398037U - Centrifugal impeller, centrifugal fan and air conditioner - Google Patents
Centrifugal impeller, centrifugal fan and air conditioner Download PDFInfo
- Publication number
- CN211398037U CN211398037U CN202020101469.5U CN202020101469U CN211398037U CN 211398037 U CN211398037 U CN 211398037U CN 202020101469 U CN202020101469 U CN 202020101469U CN 211398037 U CN211398037 U CN 211398037U
- Authority
- CN
- China
- Prior art keywords
- impeller
- net
- centrifugal
- flow
- rectifying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a centrifugal impeller, centrifugal fan and air conditioner. The centrifugal impeller includes: the impeller comprises an impeller body, wherein the impeller body comprises at least one section of impeller, the impeller comprises a plurality of blades which are arranged at intervals along the circumferential direction of the impeller body, and an impeller flow channel is formed between two adjacent blades of each section of impeller; and the at least one rectifying net is arranged on the impeller body and is positioned at the impeller flow passage. The utility model discloses an add the rectification net in impeller runner department, can break up the air current of impeller runner department, reduce the vortex of impeller runner department air current, play effectual rectification effect to can effectively reduce the flow separation of air current in impeller runner, reduce the disturbance that gaseous entering spiral case department, improve gaseous mobile state, effectively prevent to produce big vortex, and then reduced the flow loss of air current in the spiral case, improve the efficiency of fan, reduced the vortex noise.
Description
Technical Field
The utility model relates to an air conditioner technical field particularly, relates to a centrifugal impeller, centrifugal fan and air conditioner.
Background
At present, the loss of the airflow of a multi-blade centrifugal fan in a volute is large, the impeller flow channel of the fan is short, the curvature is large, the airflow is seriously separated in the impeller channel, and the eddy noise is large.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above technical problems, an object of the present invention is to provide a centrifugal impeller.
Another object of the present invention is to provide a centrifugal fan comprising the above centrifugal impeller.
Another object of the present invention is to provide an air conditioner including the above centrifugal fan.
In order to achieve the above object, the present invention provides a centrifugal impeller, including: the impeller comprises an impeller body, wherein the impeller body comprises at least one section of sub-impeller, the sub-impeller comprises a plurality of blades which are arranged at intervals along the circumferential direction of the impeller body, and an impeller flow channel is formed between two adjacent blades of each section of sub-impeller; and the at least one rectifying net is arranged on the impeller body and is positioned at the impeller flow passage.
The utility model discloses the centrifugal impeller that technical scheme of the first aspect provided, through addding the rectification net in impeller runner department, can break up the air current of impeller runner department, reduce the vortex of impeller runner department air current, play effectual rectification effect, thereby can effectively reduce the flow separation of air current in the impeller runner, reduce the disturbance that gas got into spiral case department, improve gaseous flow state, effectively prevent to produce big vortex, and then reduced the flow loss of air current in the spiral case, the efficiency of fan is improved, the vortex noise is reduced.
Additionally, the utility model provides an above-mentioned technical scheme centrifugal impeller can also have following additional technical characterstic:
in the technical scheme, the rectifying net is arranged at the inlet of the impeller flow passage; and/or the outlet of the impeller flow passage is provided with the rectifying net.
The rectifying net is arranged at the inlet of the impeller flow passage, so that the rectifying net can well rectify the airflow entering the impeller flow passage; and compare in establishing the rectification net in the inside of impeller runner, thereby the rectification net of the entrance of each impeller runner of being convenient for links as an organic whole and realizes one-step installation, and need not to install little rectification net respectively in each impeller runner to the product structure has been simplified, has improved assembly efficiency.
The rectifying net is arranged at the outlet of the impeller flow passage, so that the rectifying net can play a good role in rectifying the airflow flowing out of the impeller flow passage; compared with the rectification network arranged inside the impeller flow channel, the rectification network at the outlet of each impeller flow channel is connected into a whole, so that one-step installation is realized, small rectification networks do not need to be installed in each impeller flow channel, the product structure is simplified, and the assembly efficiency is improved.
In the technical scheme, the rectifying net is of a cylindrical integrated structure, and the rectifying net is sleeved on the impeller body.
The design of the rectifying net is a cylindrical integrated structure, so that the structure of the rectifying net is regular, the rectifying net is convenient to machine and form, and is matched with the impeller body in a sleeved mode, the rectifying effect can be achieved on the air flow of each impeller flow channel in the circumferential direction, the assembling process is simplified, and the assembling efficiency is improved.
In the above technical solution, the number of the sub-impeller sections is plural, and each sub-impeller section is respectively sleeved with the rectifying net.
The section number of the sub-impellers is multiple, the adjacent sub-impellers are generally separated by connecting structures such as a middle disc, the edges of the connecting structures can protrude out of the outer edges of the blades, and therefore the rectifying net is sleeved on each section of the sub-impellers respectively, the influence of the connecting structures such as the middle disc can be avoided, the distance between the rectifying net and the blades of the sub-impellers is favorably reduced, and the rectifying effect is further improved.
In the above technical scheme, the rectifying net is a metal net; or the rectifying net is a plastic net.
The rectification net adopts a metal net, so that the strength is high and the reliability is high. The wire can be formed by interweaving and welding metal wires during specific production.
The rectifying net is made of a plastic net, so that the cost is low, the rectifying net can be processed into various required shapes in an injection molding mode, and the rectifying net and the impeller body can be integrally injection molded.
In any one of the above technical solutions, the rectification mesh is a filamentous mesh formed by interweaving a plurality of filaments, and the filament diameter of the filamentous mesh is in the range of 0.1mm to 2 mm; and/or the shape of the mesh of the rectification net comprises at least one of a square shape, a diamond shape, a triangular shape, a hexagonal shape or a circular shape.
The diameter of the wire of the rectification net (namely the diameter of the wire) is limited in the range from 0.1mm to 2mm, so that the problem that the strength of the rectification net is too low and the service life of the rectification net is influenced due to too small wire diameter is avoided, the problem that the rotation of an impeller is influenced or the rectification effect is influenced due to too large mesh hole due to too heavy rectification net is avoided, and meanwhile, the phenomenon that the flow field is deteriorated due to too large wire diameter and blocked flow channels is also avoided.
The shape of the mesh of the rectifier net can be, but is not limited to: the shape of the square, the rhombus, the triangle, the hexagon and the circle is simpler and more regular, the processing and the forming are convenient, the batch production is easy, and the shape can be polygonal such as pentagon and the like or other shapes such as ellipse and the like.
In any one of the above technical solutions, the centrifugal impeller further includes: the guide mechanism comprises a guide vane, and the guide vane is arranged at the impeller flow passage.
The guide mechanism is additionally arranged at the impeller flow channel, the guide vanes of the guide mechanism can guide the airflow in the impeller flow channel, so that the airflow can smoothly flow along the guide vanes, large vortex cannot be formed, and an effective rectification effect is achieved, so that the flow separation of the airflow in the impeller flow channel can be effectively reduced, the disturbance of the gas entering the volute is reduced, the flowing state of the gas is improved, the flowing loss of the airflow in the volute is reduced, the efficiency of the fan is improved, and the vortex noise is reduced.
The utility model discloses technical scheme of second aspect provides a centrifugal fan, include: a volute; and a centrifugal impeller according to any one of the first aspect of the present invention, provided in the volute.
The utility model discloses the centrifugal fan that technical scheme of second aspect provided, because of including any one in the first aspect technical scheme centrifugal impeller, therefore have all beneficial effects that any above-mentioned technical scheme had, no longer describe herein.
In the above technical scheme, the volute comprises a volute body and at least one rectifying plate, a volute air channel is defined between the volute body and the centrifugal impeller, the rectifying plate is arranged on the inner wall surface of the volute body, and the rectifying plate is located in the volute air channel.
This scheme has add at least one cowling panel in the snail wind channel of spiral case body, the cowling panel can play the guide effect to the air current that gets into the spiral case, make the air current smoothly flow along the cowling panel, and can not form big vortex, play effectual rectification effect, thereby can effectively reduce the separation of flow of air current in the impeller runner, reduce the disturbance that gas got into spiral case department, improve gaseous flow state, and then reduced the flow loss of air current in the spiral case, the efficiency of fan has been improved, the vortex noise has been reduced.
The utility model discloses technical scheme of third aspect provides an air conditioner, include: an air conditioner main body; and the centrifugal fan is arranged in the air conditioner main body.
The utility model discloses the air conditioner that technical scheme of third aspect provided, because of including second aspect technical scheme centrifugal fan, therefore have all beneficial effects that any above-mentioned technical scheme had, no longer describe herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic perspective view of an impeller body according to some embodiments of the present invention;
fig. 2 is a schematic perspective view of a centrifugal impeller according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a centrifugal impeller according to another embodiment of the present invention;
fig. 4 is a schematic structural view of a centrifugal fan according to some embodiments of the present invention with a rectifying net removed;
fig. 5 is a schematic structural diagram of a centrifugal impeller (with a rectifying net removed) according to an embodiment of the present invention;
FIG. 6 is a front view of the centrifugal impeller of FIG. 5;
FIG. 7 is a schematic left side elevational view of the centrifugal impeller of FIG. 5;
fig. 8 is a schematic structural view of a volute according to some embodiments of the present invention;
fig. 9 is a schematic structural view of a centrifugal fan (with a rectifying net removed) according to some embodiments of the present invention;
FIG. 10 is a schematic front view of the centrifugal fan of FIG. 9;
fig. 11 is a schematic structural diagram of a rectifying plate according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a rectifying plate according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a rectifying plate according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a rectifying plate according to an embodiment of the present invention;
fig. 15 is a schematic block diagram of an air conditioner according to some embodiments of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 15 is:
100 centrifugal impellers, 1 impeller body, 11 sub-impellers, 111 blades, 112 impeller flow channels, 1121 inlets, 1122 outlets, 12 frames, 13 middle discs, 2 rectifying nets, 3 flow guide mechanisms, 31 flow guide rings and 32 flow guide sheets;
200 centrifugal fan, 202 volute, 2022 volute body, 2024 volute plate, 2026 volute tongue, 2028 side plate, 2030 fairing plate, 2032 inner contour, 2034 outer contour, 2036 through hole;
300 air conditioner, 302 air conditioner body.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The centrifugal impeller, the centrifugal fan and the air conditioner according to some embodiments of the present invention will be described with reference to fig. 1 to 15.
The utility model discloses the embodiment of the first aspect provides a centrifugal impeller 100 specifically is multi-vane impeller, perhaps called multi-vane centrifugal impeller 100, include: impeller body 1 and at least one fairing 2, as shown in fig. 2 and 3.
Specifically, the impeller body 1 includes at least one segment of the sub-impeller 11, and the sub-impeller 11 includes a plurality of blades 111 spaced along the circumferential direction of the impeller body 1, as shown in fig. 1. The blades 111 extend in a long strip shape in the axial direction of the centrifugal impeller 100. An impeller flow passage 112 is formed between two adjacent blades 111 of each section of the impeller 11, as shown in fig. 1.
The rectifying net 2 is provided on the impeller body 1 as shown in fig. 2 and 3, and is located at the impeller flow passage 112.
The utility model discloses centrifugal impeller 100 that the embodiment of the first aspect provided, through set up rectification net 2 in impeller runner 112 department, can break up the air current of impeller runner 112 department, reduce the vorticity of impeller runner 112 department air current, play effectual rectification effect, thereby can effectively reduce the flow separation of air current in impeller runner 112, reduce the disturbance that gas got into spiral case 202 department, improve gaseous flow state, effectively prevent to produce big vortex, and then reduced the flow loss of air current in spiral case 202, the efficiency of fan has been improved, the vortex noise has been reduced.
In an embodiment of the present invention, a rectifying net 2 is disposed at the inlet 1121 of the impeller flow passage 112, as shown in fig. 3.
The rectifying net 2 is arranged at the inlet 1121 of the impeller flow passage 112, so that the rectifying net can play a good role in rectifying the airflow entering the impeller flow passage 112; compared with the rectification network 2 arranged inside the impeller flow passage 112, the rectification network 2 at the inlet 1121 of each impeller flow passage 112 is connected into a whole to realize one-step installation, and small rectification networks 2 do not need to be installed in each impeller flow passage 112, so that the product structure is simplified, and the assembly efficiency is improved.
In another embodiment of the present invention, a rectifying net 2 is disposed at the outlet 1122 of the impeller flow passage 112, as shown in fig. 2.
The rectifying net 2 is arranged at the outlet 1122 of the impeller flow passage 112, so that the air flow flowing out of the impeller flow passage 112 can be well rectified; compared with the rectification network 2 arranged inside the impeller flow passage 112, the rectification network 2 at the outlet 1122 of each impeller flow passage 112 is connected into a whole to realize one-step installation, and small rectification networks 2 do not need to be installed in each impeller flow passage 112, so that the product structure is simplified, and the assembly efficiency is improved.
In another embodiment of the present invention, the rectifying nets 2 are disposed at the inlet 1121 and the outlet 1122 of the impeller flow passage 112, as shown in fig. 3.
Compared with the case that the rectifying nets 2 are arranged only at the inlets 1121 of the impeller flow passages 112 or only at the outlets 1122 of the impeller flow passages 112, the rectifying nets 2 on the inner side and the outer side of the impeller flow passages 112 are simultaneously used in the scheme, so that a better rectifying effect can be achieved, and a better vortex noise reduction effect can be achieved.
Further, the rectification net 2 is a cylindrical integrated structure, as shown in fig. 2 and 3. The rectifying net 2 is sleeved on the impeller body 1.
In some embodiments of the present invention, the number of the segments of the sub-impeller 11 is plural, as shown in fig. 1. Each section of impeller 11 is sleeved with a rectifying net 2, as shown in fig. 2 and 3.
The number of the sections of the sub-impellers 11 is multiple, the adjacent sub-impellers 11 are generally separated by a connecting structure such as the middle disc 13, and the edge of the connecting structure protrudes out of the outer edge of the blade 111, so that the rectifying net 2 is sleeved on each section of the sub-impellers 11, the influence of the connecting structure such as the middle disc 13 can be avoided, the distance between the rectifying net 2 and the blade 111 of the sub-impeller 11 is favorably reduced, and the rectifying effect is further improved.
Of course, the number of segments of the sub-impeller 11 may be 1 segment.
In some embodiments of the present invention, further, the rectifying net 2 is a metal net.
The rectifying net 2 is made of a metal net, so that the strength is high and the reliability is high. The wire can be formed by interweaving and welding metal wires during specific production.
In other embodiments of the present invention, further, the rectifying net 2 is a plastic net.
The rectifying net 2 is made of a plastic net, is low in cost, is convenient to process into various required shapes in an injection molding mode, and is convenient to integrally injection-mold with the impeller body 1.
In any of the above embodiments, the rectifying net 2 is a filamentous net formed by interlacing a plurality of filaments, and the filament diameter of the filamentous net is in the range of 0.1mm to 2 mm.
The wire diameter (i.e. the diameter of the wire) of the rectification network 2 is limited in the range of 0.1mm to 2mm, such as 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm and the like, so that the service life of the rectification network 2 is prevented from being influenced by too low strength of the rectification network 2 due to too small wire diameter, the rectification effect is prevented from being influenced by too heavy rectification network 2 or too large mesh due to too large wire diameter, and the flow field is prevented from being deteriorated due to too large wire diameter blocking of the flow channel.
In any of the above embodiments, further, the shape of the mesh of the rectification net 2 includes at least one of a square, a diamond, a triangle, a hexagon, or a circle.
The shape of the mesh of the rectifier net 2 may be, but is not limited to: the shape of the square, the rhombus, the triangle, the hexagon and the circle is simpler and more regular, the processing and the forming are convenient, the batch production is easy, and the shape can be polygonal such as pentagon and the like or other shapes such as ellipse and the like.
In some embodiments of the present invention, on the basis of any of the above embodiments, further, the centrifugal impeller 100 further includes: at least one flow guide means 3, as shown in fig. 5 to 7. The flow guiding mechanism 3 is connected to the impeller body 1, and the flow guiding mechanism 3 includes a flow guiding plate 32, as shown in fig. 5 to 7, the flow guiding plate 32 is disposed at the impeller flow passage 112.
By additionally arranging the flow guide mechanism 3 at the impeller flow passage 112, the flow guide piece 32 of the flow guide mechanism 3 can guide the airflow in the impeller flow passage 112, so that the airflow can smoothly flow along the flow guide piece 32 without forming a large vortex, and an effective rectification effect is achieved, thereby effectively reducing the flow separation of the airflow in the impeller flow passage 112, reducing the disturbance of the gas entering the volute 202, improving the flow state of the gas, further reducing the flow loss of the airflow in the volute 202, improving the efficiency of the fan, and reducing the vortex noise.
In some embodiments of the present invention, further, the sub-impeller 11 defines a first cylindrical reference surface and a second cylindrical reference surface concentrically sleeved outside the first cylindrical reference surface, and the inner edges of the plurality of blades 111 are located on the first cylindrical reference surface, as shown in fig. 6. The inner and outer edges of all the deflectors 32 of the flow guiding mechanism 3 corresponding to the sub-impeller 11 are located on the third and fourth cylindrical reference surfaces, respectively, as shown in fig. 6.
The outer edges of the plurality of blades 111 of the sub-impeller 11 are generally fixedly connected to the frame 12, the inner edges of the plurality of blades 111 are located on a first cylindrical reference surface, and the outer side wall of the frame 12 defines a second cylindrical reference surface, so the radius of the first cylindrical reference surface (i.e., the distance between the inner edge of the blade 111 and the central axis of the sub-impeller 11) is defined as the inner diameter of the sub-impeller 11, and the radius of the second cylindrical reference surface (i.e., the distance between the outer side wall of the frame 12 and the central axis of the sub-impeller 11) is defined as the outer diameter of the sub-impeller 11.
The inner edges of the plurality of blades 111 of the sub-impeller 11 are located on the first cylindrical reference surface, so that the shapes and the sizes of the plurality of blades 111 can be kept consistent, the structure is regular, the processing and the forming are facilitated, the assembly is facilitated, the uniformity of the air flow is also facilitated to be improved, the vortex generated by mutual impact of the air flow is prevented, and the vortex noise is also facilitated to be reduced.
Similarly, the inner edges and the outer edges of the plurality of flow deflectors 32 of the flow guiding mechanism 3 corresponding to the sub-impeller 11 are respectively located on the third cylindrical reference surface and the fourth cylindrical reference surface, so that the shapes and the sizes of the plurality of flow deflectors 32 can be kept consistent, the structure is more regular, the processing and the forming are convenient, the assembly is convenient, the uniformity of the air flow is favorably improved, the air flow is prevented from impacting each other to generate vortex, and the vortex noise is favorably reduced.
Further, the radius of the third cylindrical reference surface is greater than or equal to the radius of the first cylindrical reference surface, and as shown in fig. 6, the radius of the fourth cylindrical reference surface is greater than or equal to or less than the radius of the second cylindrical reference surface.
The radius R3 of the third cylindrical reference surface is greater than or equal to the radius of the first cylindrical reference surface R1, and the inner edge of the baffle 32 is located in the impeller flow channel 112 or at the inlet 1121 of the impeller flow channel 112, so that the baffle 32 does not affect the flow entering the impeller flow channel 112, and the flow entering the impeller flow channel 112 is ensured.
The position of the outer edge of the guide vane 32 and the position of the outer edge of the vane 111 are not limited, and may be located inside the impeller flow passage 112, at the outlet 1122 of the impeller flow passage 112, or outside the outlet 1122 of the impeller flow passage 112, so that the radius R4 of the fourth cylindrical reference surface is greater than or equal to or less than the radius R2 of the second cylindrical reference surface.
In some embodiments of the present invention, further, the diversion mechanism 3 further includes a diversion ring 31, as shown in fig. 5 to 7. The guide ring 31 is sleeved on the sub-impeller 11, and as shown in fig. 5 to 7, the guide vanes 32 are arranged on the guide ring 31.
The guide ring 31 serves as an installation carrier for the guide vanes 32, so that the position stability of the guide vanes 32 is ensured, and the plurality of guide vanes 32 of each sub-impeller 11 are conveniently assembled together, thereby realizing one-step installation of the guide mechanism 3 and the sub-impellers 11. Meanwhile, when the guide ring 31 is connected with the corresponding blades 111 of the sub-impeller 11, the guide ring can also reinforce the plurality of blades 111 of the sub-impeller 11.
Wherein, the length W1 of the guide ring 31 in the axial direction of the impeller body 1 is smaller than the length W2 of the corresponding guide vane 32 in the axial direction of the impeller body 1, as shown in fig. 7.
The axial length (marked as W1) of the guide ring 31 along the impeller body 1 is less than the axial length (marked as W2) of the corresponding guide vane 32 (namely, the guide vane 32 arranged on the guide ring 31) along the impeller body 1, so that the guide ring 31 is relatively narrow, the guide ring 31 can be effectively prevented from blocking the flow of the air flow, and the guide vane 32 is relatively wide, so that more air flows along the guide ring can be conveniently flowed, thereby improving the guide effect and further improving the noise reduction effect.
In some embodiments of the present invention, the guide ring 31 is sleeved on the outer edge of the plurality of blades 111 of the corresponding sub-impeller 11, as shown in fig. 5 and 6.
The guide rings 31 are sleeved on the outer edges of the corresponding sub-impellers 11, so that the guide mechanism 3 is conveniently connected with the sub-impellers 11 compared with the guide rings 31 arranged on the inner sides of the sub-impellers 11, the assembly process is simplified, and the assembly efficiency is improved.
In some embodiments of the present invention, the inner edge and the outer edge of the baffle 32 both protrude from the corresponding baffle ring 31, as shown in fig. 6.
The inner edge and the outer edge of the flow deflector 32 protrude out of the corresponding flow deflector ring 31, which is beneficial to increasing the area of the flow deflector 32, and is convenient for more air flows to flow along the flow deflector 32, thereby improving the flow guiding effect and further improving the noise reduction effect.
In any of the above embodiments, further, the number of the guide vanes 32 of the guide mechanism 3 is less than or equal to the number of the blades 111 of the corresponding sub-impeller 11.
The number of the guide vanes 32 of the guide mechanism 3 is designed to be less than or equal to the number of the corresponding blades 111 of the sub-impeller 11, so that the guide mechanism 3 can be prevented from being too complex due to the excessive guide vanes 32, the product structure can be simplified, and the product cost can be reduced.
In any of the above embodiments, further, one flow deflector 32 is disposed at each impeller flow passage 112, as shown in fig. 5 and 6.
The guide vane 32 is arranged at each impeller flow passage 112, so that the air flow at each impeller flow passage 112 can be guided, the flowing state of the air flow at each impeller flow passage 112 is improved, and the noise reduction effect is further improved; and the structure of the product is regular, the processing, forming and assembly are convenient, and the stress balance of the product is facilitated.
In some embodiments of the present invention, further, the number of the flow guiding mechanisms 3 is at least two, as shown in fig. 5 and 7, a plurality of flow guiding mechanisms 3 are arranged along the axial direction of the impeller body 1 at intervals.
The plurality of flow guiding mechanisms 3 are arranged at intervals along the axial direction of the volute body 2022, so that the flow guiding effect can be further improved, and the eddy current loss and the eddy current noise can be further reduced. Further, for the bidirectional air intake centrifugal fan 200, the centrifugal impeller 100 includes two sections of sub-impellers 11, and each section of sub-impeller 11 is correspondingly provided with at least one flow guide mechanism 3, so as to ensure that the air flow at each section of sub-impeller 11 can be effectively rectified.
Further, the number of segments of the sub-impeller 11 is two, as shown in fig. 1. The axial distances between the vertical planes of the two guide rings 31 perpendicular to the axis of the impeller 11 and the same end face of the impeller body 1 are respectively designated as L1 and L2, and the axial length of the impeller body 1 is designated as L0, as shown in fig. 7.
Wherein L0, L1 and L2 satisfy: 1/8L0 is not less than L1 is not less than 3/8L0, 5/8L0 is not less than L2 is not less than 7/8L 0.
For the bidirectional air intake centrifugal fan 200, the number of the segments of the sub-impeller 11 is two, and the possibility of generating vortex in the axial middle of the two segments of the sub-impeller 11 is high, so that the guide rings 31 of the two guide mechanisms 3 are respectively arranged in the above areas, which is beneficial to improving the rectification effect. Of course, the positions of the two deflector rings 31 are not limited to the above range, and can be reasonably adjusted as required in the actual production process.
Specifically, as for the bidirectional air intake centrifugal fan 200, as shown in fig. 1, the centrifugal impeller 100 includes two frames 12, a middle disc 13 and a plurality of blades 111, the plurality of blades 111 are respectively arranged on two faces of the middle disc 13 at intervals along the circumferential direction thereof, and the two frames 12 respectively fix the ends of the plurality of blades 111. The volute 202 includes a volute plate 2024, a volute tongue 2026 and two side plates 2028, and an air guiding ring is further disposed at an air inlet of the volute 202, as shown in fig. 4.
Of course, the number of the segments of the sub-impeller 11 may be one, and the centrifugal fan 200 is a centrifugal fan 200 with air intake at one side.
An embodiment of the second aspect of the present invention provides a centrifugal fan 200, as shown in fig. 4, fig. 8, fig. 9 and fig. 10, including: a volute 202 and a centrifugal impeller 100 as in any one of the embodiments of the first aspect, the centrifugal impeller 100 being provided within the volute 202.
The embodiment of the second aspect of the present invention provides a centrifugal fan 200, which comprises the centrifugal impeller 100 of any one of the embodiments of the first aspect, and therefore has all the advantages of any one of the embodiments, and is not repeated herein.
In the above embodiment, the scroll casing 202 includes the scroll casing body 2022 and at least one flow straightening plate 2030, a scroll air passage is defined between the scroll casing body 2022 and the centrifugal impeller 100, the flow straightening plate 2030 is provided on the inner wall surface of the scroll casing body 2022, and the flow straightening plate 2030 is located in the scroll air passage.
According to the scheme, at least one rectifying plate 2030 is additionally arranged in the volute air channel of the volute body 2022, the rectifying plate 2030 can guide the air flow entering the volute 202, so that the air flow smoothly flows along the rectifying plate 2030, a large vortex cannot be formed, and an effective rectifying effect is achieved, so that the flow separation of the air flow in the impeller flow channel 112 can be effectively reduced, the disturbance of the air flow entering the volute 202 is reduced, the flowing state of the air is improved, the flowing loss of the air flow in the volute 202 is reduced, the efficiency of a fan is improved, and the vortex noise is reduced.
In some embodiments of the present invention, the projected contour of the fairing plate 2030 on the cross-section of the volute body 2022 includes an inner contour 2032 and an outer contour 2034, as shown in fig. 11-14. The outer contour line 2034 is located radially outward of the inner contour line 2032, the cross-section being perpendicular to the axis of the volute 202.
The outer contour line 2034 is overlapped or partially overlapped with the contour line of the cross section, and the inner contour line 2032 is surrounded to form a circular structure or an arc structure.
In these embodiments, the projected contour of the fairing 2030 on the cross section of the volute body 2022 includes an inner contour 2032 and an outer contour 2034, the inner contour 2032 defines a space for avoiding the centrifugal impeller 100, and it is ensured that the installation and rotation of the centrifugal impeller 100 are not affected by the arrangement of the fairing 2030.
The outer contour line 2034 coincides with the contour line or part of the cross section of the volute body 2022, and the shape of the outer edge of the flow straightening plate 2030 coincides with the cross section of the volute body 2022 or part of the outer edge coincides with the cross section of the volute body 2022, so that the structure is regular, the connection between the flow straightening plate 2030 and the volute body 2022 is facilitated, and the air flow smoothly flows to the air outlet of the volute body 2022 along the flow straightening plate 2030, thereby improving the flow straightening effect. The inner contour line 2032 defines a circular or circular arc structure, which is consistent with the centrifugal impeller 100 in shape, thereby ensuring the normal installation and rotation of the centrifugal impeller. Of course, the inner contour 2032 may also enclose a circular configuration when the outer contour 2034 overlaps the contour portion of the cross-section. Such as: 11-13, the outer contour 2034 is partially recessed to clear some of the structures on the volute body 2022, while the inner contour 2032 remains unchanged, such that the outer contour 2034 partially coincides with the cross-sectional contour and the inner contour 2032 circumscribes a circular structure.
In some embodiments, the outer contour 2034 coincides with the contour of the cross-section, and as shown in fig. 11-13, the inner contour 2032 circumscribes a circular configuration.
When the outer contour line 2034 coincides with the cross-sectional contour line, as shown in fig. 11 to 13, it indicates that the outer edge of the rectifying plate 2030 completely coincides with the cross-sectional shape of the volute body 2022, and at this time, the inner contour line 2032 encloses a circular structure, which coincides with the shape of the centrifugal impeller 100, thereby ensuring the normal installation and rotation of the centrifugal impeller 100.
In other embodiments, the outer contour 2034 partially coincides with the cross-sectional contour, and as shown in FIG. 14, the inner contour 2032 circumscribes a circular arc configuration.
When the outer contour line 2034 partially overlaps with the contour line of the cross section, as shown in fig. 14, the inner contour line 2032 encloses a circular arc-shaped structure, which is also consistent with the shape of the impeller, so as to ensure the normal installation and rotation of the centrifugal impeller 100, and facilitate the preparation of the fairing plate 2030 and the volute body 2022 by integral molding. Of course, the outer edge and the inner edge of the flow regulating plate 2030 are not limited to the above shapes, and may be adjusted as needed in an actual production process. Of course, when the outer contour 2034 coincides with the cross-sectional contour, the inner contour 2032 may also enclose a circular arc-shaped configuration. Such as: on the basis of fig. 14, the notches of the outer contour line 2034 are connected by thin sheets, so that the outer contour line 2034 coincides with the contour line of the cross section, and the thin sheets can neglect the influence of the inner contour line 2032, so that the inner contour line 2032 still encloses a circular arc-shaped structure.
In some embodiments of the present invention, specifically, the inner contour 2032 is circular (as shown in fig. 11 and 13) or circular arc (as shown in fig. 14).
The inner contour line 2032 is circular or circular arc-shaped, can enclose a regular circular structure or a regular circular arc-shaped structure, has a simple structure, and is convenient to machine and mold.
In other embodiments of the present invention, further, the inner contour 2032 is in the shape of a saw-toothed circle (as shown in fig. 12) or a circular arc.
The inner contour line 2032 is in a zigzag circular or circular arc shape, and can enclose a zigzag circular structure or a zigzag circular arc structure, so that the zigzag structure at the inner edge of the rectifying plate 2030 can also play a role in scattering air flow, further preventing the air flow from separating to form vortex, and further reducing the vortex loss and the vortex noise.
In still other embodiments of the present invention, further, the inner contour 2032 is in the shape of a wavy circle or arc.
The inner contour line 2032 is in a wavy circular shape or circular arc shape, and can enclose a wavy circular structure or a wavy circular arc structure, so that the wavy structure at the inner edge of the rectifying plate 2030 can also play a role in scattering air flow, further preventing the air flow from separating to form vortex, and further reducing vortex loss and vortex noise.
Of course, the inner contour line 2032 is not limited to the above-described shape, and may be adjusted as needed during actual production.
In any of the above embodiments, further, the rectifying plate 2030 and the scroll body 2022 are an integrally formed integral structure.
The rectifying plate 2030 and the volute body 2022 are integrally formed, which is not only beneficial to improving the connection strength of the rectifying plate 2030 and the volute body 2022, thereby improving the use reliability of the volute 202, but also is beneficial to improving the production efficiency of the volute 202 by omitting the assembly process of the volute body 2022 and the rectifying plate 2030.
In any of the above embodiments, further, the number of the rectification plates 2030 is at least two, as shown in fig. 8 and 9. A plurality of fairing plates 2030 are spaced axially along the volute body 2022.
The plurality of rectifying plates 2030 are provided at intervals in the axial direction of the scroll case body 2022, and the rectifying effect can be further improved, and the eddy current loss and the eddy current noise can be further reduced.
Further, for the bidirectional air intake centrifugal fan 200, the centrifugal impeller 100 includes two sections of sub-impellers 11, and at least one straightening plate 2030 is correspondingly disposed at each section of sub-impeller 11, as shown in fig. 9 and 10, so as to ensure that the air flow at each section of sub-impeller 11 can be effectively straightened.
Further, the number of the rectification plates 2030 is two as shown in fig. 8 to 10. Axial distances between a vertical plane perpendicular to the axis of the volute body 2022 and a vertical plane perpendicular to the axis of the volute body 2022 of the two straightening plates 2030 are respectively denoted by La and Lb, as shown in fig. 10, axial lengths of the volute 202 are denoted by L, L and Lb satisfy: 1/8L & ltLa & lt 3/8L, 1/8L & ltLb & lt 3/8L, wherein La & ltLb or La & ltLb & gt.
For the bidirectional air intake centrifugal fan 200, the possibility of generating a vortex at the axial middle part of each section of the impeller 11 is high, and therefore, the two rectifying plates 2030 are respectively arranged in the above-mentioned regions, which is beneficial to improving the rectifying effect.
Of course, the positions of the two rectifying plates 2030 are not limited to the above ranges, and may be appropriately adjusted as needed in an actual production process.
In any of the above embodiments, the rectifying plate 2030 is further provided with a plurality of through holes 2036, as shown in fig. 12.
The plurality of through holes 2036 are formed in the rectifying plate 2030, which is beneficial to balancing the airflow pressure in the volute 202, and further beneficial to preventing the generation of vortex, so as to further improve the noise reduction effect.
In the above embodiment, the shape of the through hole 2036 is circular (as shown in fig. 12), square, diamond, or hexagonal.
Of course, the shape is not limited to the above shape, and may be a polygon such as a pentagon or a triangle, or an ellipse.
Further, an escape gap is provided between the rectifying plate 2030 and the centrifugal impeller 100.
Set up between cowling panel 2030 and centrifugal impeller 100 and dodge the clearance for cowling panel 2030 can dodge with centrifugal impeller 100, and the impeller assembly of both being convenient for, the impeller of being convenient for is rotatory again, and is convenient for install structures such as rectification net 2, water conservancy diversion mechanism 3 on the impeller, with further reduction eddy current loss and vortex noise.
Further, in the case that the inner contour line 2032 of the rectifying plate 2030 of the scroll 202 is defined to have a circular or circular arc structure, the inner diameter of the structure may be larger than the outer diameter (i.e., R2) of the centrifugal impeller 100.
An embodiment of the third aspect of the present invention provides an air conditioner 300, as shown in fig. 15, including: an air conditioner main body 302 and a centrifugal fan 200 according to any one of the embodiments of the second aspect, the centrifugal fan 200 being provided in the air conditioner main body 302.
The embodiment of the third aspect of the present invention provides an air conditioner 300, which has all the advantages of any of the above embodiments due to the centrifugal fan 200 of the embodiment of the second aspect, and is not repeated herein.
In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A centrifugal impeller, comprising:
the impeller comprises an impeller body, wherein the impeller body comprises at least one section of sub-impeller, the sub-impeller comprises a plurality of blades which are arranged at intervals along the circumferential direction of the impeller body, and an impeller flow channel is formed between two adjacent blades of each section of sub-impeller;
and the at least one rectifying net is arranged on the impeller body and is positioned at the impeller flow passage.
2. The centrifugal impeller according to claim 1,
the rectifying net is arranged at the inlet of the impeller flow passage; and/or
The outlet of the impeller flow passage is provided with the rectifying net.
3. The centrifugal impeller according to claim 2,
the rectifying net is of a cylindrical integrated structure and is sleeved on the impeller body.
4. The centrifugal impeller according to claim 3,
the number of the sections of the sub-impeller is multiple, and the rectifying net is sleeved on each section of the sub-impeller.
5. The centrifugal impeller according to any one of claims 1 to 4,
the rectifying net is a metal net; or
The rectification net is a plastic net.
6. The centrifugal impeller according to any one of claims 1 to 4,
the rectification net is a filamentous net formed by interweaving a plurality of filaments, and the filament diameter of the filamentous net is in the range of 0.1mm to 2 mm; and/or
The shape of the meshes of the rectifying net comprises at least one of a square shape, a diamond shape, a triangular shape, a hexagonal shape or a circular shape.
7. The centrifugal impeller of any one of claims 1 to 4, further comprising:
the flow guide assembly comprises a flow guide ring and a flow guide sheet arranged on the flow guide ring, the flow guide ring is sleeved on the sub-impeller, and the flow guide sheet is positioned at the impeller flow passage.
8. A centrifugal fan, comprising:
a volute; and
a centrifugal impeller according to any one of claims 1 to 7, provided within the volute.
9. The centrifugal fan of claim 8,
the volute comprises a volute body and at least one rectifying plate, a volute air channel is limited between the volute body and the centrifugal impeller, the rectifying plate is arranged on the inner wall surface of the volute body, and the rectifying plate is located in the volute air channel.
10. An air conditioner, comprising:
an air conditioner main body; and
the centrifugal fan as claimed in claim 9, provided in the air-conditioning main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020101469.5U CN211398037U (en) | 2020-01-17 | 2020-01-17 | Centrifugal impeller, centrifugal fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020101469.5U CN211398037U (en) | 2020-01-17 | 2020-01-17 | Centrifugal impeller, centrifugal fan and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211398037U true CN211398037U (en) | 2020-09-01 |
Family
ID=72216848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020101469.5U Active CN211398037U (en) | 2020-01-17 | 2020-01-17 | Centrifugal impeller, centrifugal fan and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211398037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439772A (en) * | 2022-03-28 | 2022-05-06 | 西安交通大学 | Bionic wing-shaped flow distribution net, low-noise cross flow fan and air conditioner |
-
2020
- 2020-01-17 CN CN202020101469.5U patent/CN211398037U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439772A (en) * | 2022-03-28 | 2022-05-06 | 西安交通大学 | Bionic wing-shaped flow distribution net, low-noise cross flow fan and air conditioner |
| CN114439772B (en) * | 2022-03-28 | 2022-11-15 | 西安交通大学 | Bionic wing-shaped flow distribution net, low-noise cross flow fan and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3842644B1 (en) | Counter-rotating fan | |
| JP6385752B2 (en) | Outdoor unit for blower and air conditioner | |
| CN209944584U (en) | Air inlet grille and air condensing units | |
| WO2012002080A1 (en) | Fan, casting die and fluid delivery device | |
| CN110513304B (en) | Centrifugal fan and dust collector | |
| CN109611356B (en) | Backward centrifugal fan | |
| KR20150136935A (en) | Centrifugal fan | |
| CN211398037U (en) | Centrifugal impeller, centrifugal fan and air conditioner | |
| KR101742965B1 (en) | Blower and outdoor unit of air conditioner having the same | |
| CN214660987U (en) | Air supply device and air treatment equipment | |
| CN211398038U (en) | Centrifugal impeller, centrifugal fan and air conditioner | |
| CN211398051U (en) | Volute, centrifugal fan and air conditioner | |
| CN214742227U (en) | Air supply device and air treatment equipment | |
| CN210861438U (en) | Air inlet grille and air condensing units | |
| CN216691524U (en) | Centrifugal flow-inhibiting fan | |
| CN215863768U (en) | Air outlet net cover and air conditioner | |
| CN108397846B (en) | Air conditioning equipment | |
| CN216447178U (en) | Backward centrifugal fan | |
| CN212274121U (en) | Air condensing units and air-out grid thereof | |
| CN210267661U (en) | Air duct assembly and air purifier | |
| CN217423352U (en) | Rectifying net, fan and range hood | |
| CN221220905U (en) | Centrifugal wind wheel and air conditioning equipment | |
| CN220707552U (en) | Air outlet net cover, air conditioner external unit and air conditioner | |
| CN218913258U (en) | Novel structure of high-efficient impeller | |
| CN216077641U (en) | Centrifugal fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |