CN211398051U - Volute, centrifugal fan and air conditioner - Google Patents

Abstract

The utility model provides a spiral case, centrifugal fan and air conditioner. The volute includes: the volute comprises a volute body, wherein an installation space for installing a centrifugal impeller is defined in the volute body, and a volute air channel is formed between the installation space and the inner wall surface of the volute body; and the at least one rectifying plate is arranged on the inner wall surface of the volute body and is positioned in the volute air channel. The utility model discloses at least one cowling panel has been add 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 flow separation 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 is improved, the eddy noise is reduced.

Description

Volute, centrifugal fan and air conditioner

Technical Field

The utility model relates to an air conditioner technical field particularly, relates to a spiral case, 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 spiral casing.

Another object of the present invention is to provide a centrifugal fan comprising the above volute.

It is still another object of the present invention to provide an air conditioner including the above centrifugal fan.

In order to achieve the above object, the present invention provides a spiral casing, including: the volute comprises a volute body, wherein an installation space for installing a centrifugal impeller is defined in the volute body, and a volute air channel is formed between the installation space and the inner wall surface of the volute body; and the at least one rectifying plate is arranged on the inner wall surface of the volute body and is positioned in the volute air channel.

The utility model discloses the spiral case that technical scheme of the first aspect provided, at least one cowling panel has been add in the spiral 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 flow separation of air current in the impeller runner, reduce the disturbance that gas got into spiral case department, improve gaseous mobile state, 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 a spiral case among the above-mentioned technical scheme can also have following additional technical characterstic:

in the above technical solution, a projected contour line of the rectifying plate on the cross section of the volute body includes an inner contour line and an outer contour line, the outer contour line is located radially outside the inner contour line, and the cross section is perpendicular to an axis of the volute; the outer contour line is overlapped or partially overlapped with the contour line of the section, and a circular structure or a circular arc structure is defined by the inner contour line.

In this scheme, the projected outline line of cowling panel on the cross-section of spiral case body includes interior contour line and outer contour line, and interior contour line injects the space that is used for dodging centrifugal impeller, guarantees that the setting of cowling panel can not influence centrifugal impeller's installation and rotation. The outline line coincidence or the partial coincidence of the cross-section of outer contour line and spiral case body, then the shape of the outward flange of cowling panel is unanimous with the cross sectional shape of spiral case body or the partial unanimity, and the structure is regular, is convenient for be connected between cowling panel and the spiral case body, and is convenient for the air current smoothly flows to the air outlet of spiral case body along the cowling panel to improve the rectification effect. And the inner contour line is surrounded to form a circular structure or an arc-shaped structure, and the shape of the inner contour line is consistent with that of the centrifugal impeller, so that the normal installation and rotation of the centrifugal impeller are ensured. Of course, the outer edge and the inner edge of the rectifying plate are not limited to the above-described shapes, and can be adjusted as needed in the actual production process.

In the technical scheme, the inner contour line is circular or circular arc; or the inner contour line is in a zigzag round shape or a circular arc shape; or the inner contour line is in a wavy circular or circular arc shape.

The inner contour line is circular or arc-shaped, a regular circular structure or a regular arc-shaped structure can be defined, the structure is simple, and the processing and forming are convenient.

The inner contour line is in a zigzag round shape or a zigzag arc shape, a zigzag round structure or a zigzag arc structure can be defined, the zigzag structure on the inner edge of the rectifying plate can also play a role in scattering air flow, large eddy current is scattered into small eddy current, and therefore the energy and eddy current loss of the eddy current are reduced, and further the eddy current loss and eddy current noise are reduced.

The inner contour line is in a wavy circular shape or a wavy circular arc shape, a wavy circular structure or a wavy circular arc structure can be defined, the wavy structure on the inner edge of the rectifying plate can also play a role in scattering air flow, large eddy current is scattered into small eddy current, and therefore the energy and eddy current loss of the eddy current are reduced, and eddy current loss and eddy current noise are further reduced.

In any of the above technical solutions, the rectifying plate and the volute body are an integral structure formed integrally.

The rectifying plate and the volute body are integrally formed, so that the connection strength of the rectifying plate and the volute body is improved, the use reliability of the volute is improved, the assembling process of the volute body and the rectifying plate is omitted, and the production efficiency of the volute is improved.

In any one of the above technical solutions, the number of the flow straightening plates is at least two, and the plurality of flow straightening plates are distributed at intervals along the axial direction of the volute body.

Set up a plurality of cowling panels along the axial interval of spiral case body, can further improve the rectification effect, further reduce eddy current loss and vortex noise. Further, to the centrifugal fan of two-way air inlet, its centrifugal impeller includes two sections impeller, and every section impeller department all corresponds and sets up at least one cowling panel to guarantee that the air current of every section impeller department can both obtain effectual rectification.

In the above technical solution, the number of the rectifying plates is two, axial distances between a perpendicular plane perpendicular to the axis of the volute body and a perpendicular plane of the volute body are respectively denoted as La and Lb, an axial length of the volute is denoted as L, and L, La 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 inlet centrifugal fan, the possibility of generating vortex in the axial middle of each section of impeller is high, so that the two rectifying plates are respectively arranged in the areas, and the rectifying effect is favorably improved. Of course, the positions of the two rectifying plates are not limited to the above range, and can be reasonably adjusted according to needs in the actual production process.

In any of the above technical solutions, the rectifying plate is provided with a plurality of through holes.

Set up a plurality of through-holes on the cowling panel, be favorable to balancing the air pressure in the spiral case, and then also be favorable to preventing the vortex and produce to further improve noise reduction.

In the above technical scheme, the shape of the through hole is circular, 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.

The utility model discloses technical scheme of second aspect provides a centrifugal fan, include: the volute of any of the first aspect aspects; and a centrifugal impeller 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 impeller, therefore have all beneficial effects that any one of above-mentioned technical scheme had, no longer describe herein.

In the above technical scheme, an avoidance gap is formed between the rectifying plate and the centrifugal impeller.

Set up between cowling panel and centrifugal impeller and dodge the clearance for the cowling panel can dodge with centrifugal impeller, the impeller assembly of both being convenient for, the impeller of being convenient for again is rotatory, and is convenient for install rectification net, water conservancy diversion subassembly isotructure on the impeller, with further reduction eddy current loss and vortex noise. Further, for the scheme that a circular structure or an arc-shaped structure is defined by the inner contour line of the rectifying plate of the volute, the inner diameter of the structure is larger than the outer diameter of the centrifugal impeller.

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 a centrifugal impeller according to an embodiment 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 an 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 flow straightening plate removed;

fig. 5 is a schematic structural view of a centrifugal impeller 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 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 scroll casing, 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.

An embodiment of the first aspect of the present invention provides a volute 202, as shown in fig. 8, including: a volute body 2022 and at least one fairing 2030.

Specifically, the volute body 2022 defines therein a mounting space for mounting the centrifugal impeller 100, which is cylindrical in shape, fitting the shape of the centrifugal impeller 100. A volute air passage is formed between the installation space and the inner wall surface of the volute body 2022. In other words, after the centrifugal impeller 100 is installed in the volute 202, a volute air duct is defined between the volute body 2022 and the centrifugal impeller 100.

The rectifying plate 2030 is provided on the inner wall surface of the scroll body 2022 as shown in fig. 8 to 10 and located inside the scroll passage.

The utility model discloses spiral case 202 that the embodiment of the first aspect provided, at least one cowling panel 2030 has been add in spiral case body 2022's snail wind channel, cowling panel 2030 can play the guide effect to the air current that gets into spiral case 202, make the air current smoothly flow along cowling panel 2030, and can not form big vortex, play effectual rectification effect, thereby can effectively reduce the separation of flow in impeller runner 112, reduce the disturbance that gaseous entering spiral case 202 was located, improve gaseous flow state, and then reduced the flow loss of air current in spiral case 202, the efficiency of fan is improved, the vortex noise has been 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.

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. 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 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 and 9. 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.

An embodiment of the second aspect of the present invention provides a centrifugal fan 200, as shown in fig. 4, fig. 8 and fig. 9, including: the volute 202 and the centrifugal impeller 100, as in any of the first aspect embodiments, are provided within the volute 202.

The embodiment of the second aspect of the present invention provides a centrifugal fan 200, which comprises an impeller 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.

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 subassembly on the impeller, with further reduction eddy current loss and vortex noise.

Further, in the case where 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 R of the structure may be larger than the outer diameter (i.e., R2) of the centrifugal impeller 100.

In some embodiments of the present invention, a centrifugal impeller 100, specifically a multi-bladed impeller, or a multi-bladed centrifugal impeller 100, comprises: 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.

Design rectification net 2 for columniform integral type structure for rectification net 2's structure is comparatively regular, and the machine-shaping of being convenient for, and with impeller body 1 suit cooperation, can play the rectification effect to the air current of each impeller runner 112 department of circumference, simplified assembly process, improved assembly efficiency.

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 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 are 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 spiral casing, comprising:

the volute comprises a volute body, wherein an installation space for installing a centrifugal impeller is defined in the volute body, and a volute air channel is formed between the installation space and the inner wall surface of the volute body;

and the at least one rectifying plate is arranged on the inner wall surface of the volute body and is positioned in the volute air channel.

2. The spiral casing of claim 1,

the projected contour line of the fairing plate on the cross section of the volute body comprises an inner contour line and an outer contour line, the outer contour line is positioned on the radial outer side of the inner contour line, and the cross section is perpendicular to the axis of the volute;

the outer contour line is overlapped or partially overlapped with the contour line of the section, and a circular structure or a circular arc structure is defined by the inner contour line.

3. The spiral casing of claim 2,

the inner contour line is circular or arc-shaped; or

The inner contour line is in a zigzag round shape or a circular arc shape; or

The inner contour line is in a wavy circular shape or a circular arc shape.

4. The spiral casing of any of claims 1 to 3,

the fairing and the volute body are of an integrated structure formed integrally.

5. The spiral casing of any of claims 1 to 3,

the number of cowling panels is at least two, and is a plurality of cowling panels is along the axial interval distribution of spiral case body.

6. The spiral casing of claim 5,

the number of the rectifying plates is two, the axial distance between a vertical plane perpendicular to the axis of the volute body and a vertical plane of the volute body is respectively recorded as La and Lb, the axial length of the volute is recorded as L, and the L, the La and the Lb satisfy the following conditions: 1/8L & ltLa & lt 3/8L, 1/8L & ltLb & lt 3/8L, wherein La & ltLb or La & ltLb & gt.

7. The spiral casing of any of claims 1 to 3,

a plurality of through holes are formed in the rectifying plate.

8. A centrifugal fan, comprising:

the volute of any of claims 1 to 7; and

and the centrifugal impeller is arranged in the volute.

9. The centrifugal fan of claim 8,

an avoiding gap is arranged between the rectifying plate and the centrifugal impeller.

10. An air conditioner, comprising:

an air conditioner main body; and

a centrifugal fan according to claim 8 or 9, provided in the air conditioning main body.

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