CN215672882U - Volute tongue assembly, centrifugal fan and air conditioner - Google Patents
Volute tongue assembly, centrifugal fan and air conditioner Download PDFInfo
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- CN215672882U CN215672882U CN202122346179.4U CN202122346179U CN215672882U CN 215672882 U CN215672882 U CN 215672882U CN 202122346179 U CN202122346179 U CN 202122346179U CN 215672882 U CN215672882 U CN 215672882U
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Abstract
The utility model discloses a volute tongue assembly, a centrifugal fan and an air conditioner, wherein the volute tongue assembly comprises: the volute is provided with a spiral section and an extension section, the spiral section defines a containing cavity for containing the centrifugal wind wheel, and the extension section is connected with one end of the spiral section; the volute tongue comprises a transition section and an expansion section, wherein the transition section is arc-shaped, one end of the transition section is connected with one end of the spiral section, one end of the expansion section is connected with the other end of the transition section and defines an air outlet with the extension section, a plurality of first bulges spaced along the length direction of the extension section are arranged on the surface of the extension section facing the volute tongue, and each first bulge extends along the axial direction of the accommodating cavity; and/or the surface of the transition section facing the extension section is provided with a plurality of second bulges spaced along the length direction of the transition section, and each second bulge extends along the axial direction of the accommodating cavity. The volute tongue assembly can improve the gas flowing state, reduce the flowing energy loss and reduce the noise.
Description
Technical Field
The utility model relates to the technical field of air processing equipment, in particular to a volute tongue assembly, a centrifugal fan and an air conditioner.
Background
The centrifugal fan applied to the air conditioner comprises a centrifugal wind wheel and a volute tongue component wrapped outside the centrifugal wind wheel, wherein the centrifugal wind wheel rotates at a high speed to suck air into the centrifugal wind wheel along the axial direction, turns 90 degrees in the centrifugal wind wheel, flows out of the centrifugal wind wheel along the radial direction, and finally decelerates and pressurizes the air through the volute tongue component and flows out of the centrifugal fan from an air outlet. In the related art, the noise of the centrifugal fan is large, and the use requirement of a user cannot be met.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a volute tongue assembly which can improve the gas flowing state, reduce the energy loss of flowing and reduce the noise.
The utility model further provides a centrifugal fan which comprises the volute tongue assembly.
The utility model further provides an air conditioner which comprises the centrifugal fan.
A volute tongue assembly according to an embodiment of the present invention is for a centrifugal fan including a centrifugal rotor, the volute tongue assembly comprising: the volute comprises a spiral section and an extension section, the spiral section defines a containing cavity for containing the centrifugal wind wheel, and the extension section is connected with one end of the spiral section; the volute tongue comprises a transition section and an expansion section, the transition section is arc-shaped, one end of the transition section is connected with one end of the spiral section, one end of the expansion section is connected with the other end of the transition section and defines an air outlet with the extension section, a plurality of first bulges spaced along the length direction of the extension section are arranged on the surface of the extension section facing the volute tongue, and each first bulge extends along the axial direction of the accommodating cavity; and/or the surface of the transition section facing the extension section is provided with a plurality of second bulges spaced along the length direction of the transition section, and each second bulge extends along the axial direction of the accommodating cavity.
According to the volute tongue assembly provided by the embodiment of the utility model, the surface of the extension section facing the volute tongue is provided with the plurality of first protrusions spaced along the length direction of the extension section, each first protrusion extends along the axial direction of the accommodating cavity, and/or the surface of the transition section facing the extension section is provided with the plurality of second protrusions spaced along the length direction of the transition section, each second protrusion extends along the axial direction of the accommodating cavity, so that large-scale vortexes flowing through the extension section and/or the transition section can be dispersed into small-scale vortexes, the gas flowing state is improved, the flowing energy loss is reduced, and meanwhile, the noise is reduced.
According to some embodiments of the utility model, the first protrusion has a height H1 and satisfies: h1 is more than 0.5mm and less than 0.1K, wherein K is the opening degree of the volute.
In some embodiments of the utility model, K satisfies: k is more than or equal to 0.3D and less than or equal to 0.7D, wherein D is the diameter of the centrifugal wind wheel.
In some embodiments of the present invention, the height of the first protrusion is H1, the maximum width of the first protrusion is W1, and: 0.5H1 is not less than W1 is not less than 2H 1.
According to some embodiments of the utility model, the second protrusion has a height H2 and satisfies: h1 is more than 0.5mm and less than 0.2t, wherein t is the minimum distance between the transition section and the centrifugal wind wheel.
In some embodiments of the utility model, t satisfies: t is more than or equal to 0.05D and less than or equal to 0.1D, wherein D is the diameter of the centrifugal wind wheel.
In some embodiments of the present invention, the height of the second protrusion is H2, the maximum width of the second protrusion is W2, and: 0.5H2 is not less than W2 is not less than 2H 2.
According to some embodiments of the utility model, the cross-section of the first protrusion has a triangular, trapezoidal or rectangular shape and/or the cross-section of the second protrusion has a triangular, trapezoidal or rectangular shape.
The centrifugal fan comprises the volute tongue assembly and the centrifugal wind wheel, and the centrifugal wind wheel is arranged in the accommodating cavity.
According to the centrifugal fan provided by the embodiment of the utility model, by arranging the volute tongue assembly, the surface of the extension section facing the volute tongue is provided with the plurality of first protrusions spaced along the length direction of the extension section, each first protrusion extends along the axial direction of the accommodating cavity, and/or the surface of the transition section facing the extension section is provided with the plurality of second protrusions spaced along the length direction of the transition section, each second protrusion extends along the axial direction of the accommodating cavity, large-scale vortexes flowing through the extension section and/or the transition section can be broken up into small-scale vortexes, the gas flowing state is improved, the flowing energy loss is reduced, and meanwhile, the noise is reduced.
The air conditioner provided by the embodiment of the utility model comprises the centrifugal fan.
According to the air conditioner provided by the embodiment of the utility model, by arranging the centrifugal fan, the surface of the extension section facing the volute tongue is provided with the plurality of first protrusions spaced along the length direction of the extension section, each first protrusion extends along the axial direction of the accommodating cavity, and/or the surface of the transition section facing the extension section is provided with the plurality of second protrusions spaced along the length direction of the transition section, each second protrusion extends along the axial direction of the accommodating cavity, large-scale vortexes flowing through the extension section and/or the transition section can be broken up into small-scale vortexes, the gas flowing state is improved, the flowing energy loss is reduced, and meanwhile, the noise is reduced.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
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 view of a centrifugal fan according to an embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is an enlarged view at B in fig. 1.
Reference numerals:
100. a centrifugal fan;
10. a volute tongue assembly;
1. a volute; 11. a helical section; 111. an accommodating chamber; 12. an extension section; 121. a first protrusion;
2. a volute tongue; 21. a transition section; 211. a second protrusion; 22. an expansion section; 23. an air outlet;
20. and (4) a centrifugal wind wheel.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A volute tongue assembly 10 and a centrifugal fan 100 according to an embodiment of the utility model are described below with reference to fig. 1-3.
As shown in fig. 1, the centrifugal fan 100 includes a volute tongue assembly 10 and a centrifugal wind wheel 20, and the centrifugal wind wheel 20 is disposed in the volute tongue assembly 10.
Specifically, as shown in fig. 1, a volute tongue assembly 10 according to an embodiment of the present invention is used for a centrifugal fan 100, and the volute tongue assembly 10 includes a volute 1 and a volute tongue 2. The volute 1 has a spiral section 11 and an extension section 12, the spiral section 11 defines an accommodating cavity 111, the centrifugal wind wheel 20 is arranged in the accommodating cavity 111, and the extension section 12 is connected with one end of the spiral section 11. Optionally, the extension 12 is a straight line segment. The volute tongue 2 comprises a transition section 21 and an expansion section 22, wherein the transition section 21 is arc-shaped, one end of the transition section 21 is connected with one end of the spiral section 11, one end of the expansion section 22 is connected with the other end of the transition section 21, and an air outlet 23 is defined by the expansion section 12 and the transition section 21. Optionally, the expanding section 22 is a straight section, the expanding section 22 and the extending section 12 have an included angle therebetween, and the distance between the extending section 12 and the expanding section 22 gradually increases in a direction from one end of the expanding section 22 connected with the transition section 21 to the other end. In addition, the expansion section 22 is connected with the spiral section 11 through the transition section 21, so that the connection part of the volute tongue 2 and the volute casing 1 is better in transition.
The volute 1 and the volute tongue 2 further define an air inlet, the air inlet is arranged corresponding to the axial position of the centrifugal wind wheel 20, so that air flow entering the accommodating cavity 111 from the air inlet can better enter the centrifugal wind wheel 20, and the air outlet 23 is arranged corresponding to one radial side of the centrifugal wind wheel 20, so that air flow coming out of the centrifugal wind wheel 20 can better flow to the air outlet 23. When the centrifugal fan 100 works, the centrifugal wind wheel 20 rotates at a high speed, air is sucked into the accommodating cavity 111 from the air inlet along the axial direction of the centrifugal wind wheel 20, kinetic energy is provided for the air by the centrifugal wind wheel 20, the air flow is turned by 90 degrees, the air is blown out of the centrifugal wind wheel 20 along the radial direction, the conversion of the kinetic energy to pressure energy is realized, and then the air is discharged from the air outlet 23.
In the related technology, the minimum distance from the volute tongue assembly of the centrifugal fan to the centrifugal wind wheel is generally near the volute tongue, the flow near the volute tongue is complex, and the pressure fluctuation is large, so that the aerodynamic noise at the volute tongue is one of the main sources of the noise of the centrifugal fan. In addition, the outlet speed of the volute of the centrifugal fan is high, and a large vortex can be generated on the back of the volute, so that large noise is generated.
In the present application, the surface of the extension section 12 facing the volute tongue 2 is provided with a plurality of first protrusions 121 spaced apart along the length direction of the extension section 12, and each first protrusion 121 extends in the axial direction of the receiving cavity 111 (i.e., the axial direction of the centrifugal wind wheel 20); and/or, the surface of the transition section 21 facing the extension section 12 is provided with a plurality of second protrusions 211 spaced along the length direction of the transition section 21, and each second protrusion 211 extends along the axial direction of the accommodating cavity 111 (i.e. the axial direction of the centrifugal wind wheel 20). It can be understood that only the surface of the extension section 12 facing the volute tongue 2 is provided with a plurality of first protrusions 121 spaced apart along the length direction of the extension section 12, each first protrusion 121 extends along the axial direction of the receiving cavity 111, or only the surface of the extension section 21 facing the extension section 12 is provided with a plurality of second protrusions 211 spaced apart along the length direction of the extension section 21, each second protrusion 211 extends along the axial direction of the receiving cavity 111, or the surface of the extension section 12 facing the volute tongue 2 is provided with a plurality of first protrusions 121 spaced apart along the length direction of the extension section 12, each first protrusion 121 extends along the axial direction of the receiving cavity 111, while the surface of the extension section 21 facing the extension section 12 is provided with a plurality of second protrusions 211 spaced apart along the length direction of the transition section 21, each second protrusion 211 extends along the axial direction of the receiving cavity 111.
By providing a plurality of spaced first protrusions 121 on the surface of the extension section 12 facing the volute tongue 2, large-scale vortices flowing through the extension section 12 can be broken up into small-scale vortices, improving the gas flow state, reducing the energy loss of the flow, and reducing noise. Through set up a plurality of spaced apart second archs 211 on changeover portion 21 of volute tongue 2, can break up the vortex of the large scale that flows through changeover portion 21 into the minor scale swirl, improve the gas flow state, reduce the energy loss of flow, reduce the noise simultaneously.
In the example shown in fig. 1, with reference to fig. 2 and 3, the surface of the extension 12 facing the volute tongue 2 is provided with a plurality of first protrusions 121 spaced apart along the length of the extension 12, each first protrusion 121 extending along the axial direction of the receiving cavity 111, while the surface of the transition 21 facing the extension 12 is provided with a plurality of second protrusions 211 spaced apart along the length of the transition 21, each second protrusion 211 extending along the axial direction of the receiving cavity 111. The large-scale vortex flowing through the extension section 12 and the transition section 21 can be broken up into small-scale vortices, the gas flow state is improved, the energy loss of the flow is reduced, and the noise is reduced.
According to the volute tongue assembly 10 provided by the embodiment of the utility model, the surface of the extension section 12 facing the volute tongue 2 is provided with the plurality of first protrusions 121 spaced along the length direction of the extension section 12, each first protrusion 121 extends along the axial direction of the accommodating cavity 111, and/or the surface of the transition section 21 facing the extension section 12 is provided with the plurality of second protrusions 211 spaced along the length direction of the transition section 21, and each second protrusion 211 extends along the axial direction of the accommodating cavity 111, so that large-scale vortexes flowing through the extension section 12 and/or the transition section 21 can be dispersed into small-scale vortexes, the gas flowing state is improved, the energy loss of flowing is reduced, and meanwhile, the noise is reduced.
In some embodiments of the present invention, the cross-section of the first protrusion 121 may be triangular, trapezoidal or rectangular, so that the diversity of the structure of the first protrusion 121 may be increased, thereby increasing the diversity of the volute 1 and the structure of the volute tongue assembly 10.
When the cross section of the first protrusion 121 is triangular, the first protrusion 121 includes three surfaces, one of the three surfaces is located on the extension 12, and the width of the first protrusion 121 is gradually reduced from the end of the first protrusion 121 connected to the extension 12 to the free end of the first protrusion 121. Further, the surface of the first protrusion 121 away from the air outlet 23 is inclined toward the direction away from the extending section 12 along the airflow flowing direction, so that the airflow can be guided, and noise reduction is facilitated.
When the cross section of the first protrusion 121 is trapezoidal, the first protrusion 121 includes four surfaces, one of the two opposite and parallel surfaces is located on the extension section 12, and the other one of the two opposite surfaces away from the air outlet 23 is inclined toward the direction away from the extension section 12 along the airflow flowing direction, so that the airflow can be guided, and noise reduction is facilitated. Alternatively, the cross section of the first protrusion 121 may be an isosceles trapezoid, and the width of the first protrusion 121 gradually decreases in a direction from the end near the extension 12 to the free end of the first protrusion 121.
When the cross section of the first protrusion 121 is rectangular, the first protrusion 121 includes four surfaces, and one of two opposite and parallel surfaces is located on the extension 12.
Of course, the present invention is not limited thereto, and the cross section of the first protrusion 121 may also be other quadrangles such as a parallelogram or other irregular quadrangles or other polygons, etc.
As shown in fig. 2, when the width of the first protrusion 121 gradually decreases from the end connected to the extension 12 to the free end of the first protrusion 121, the plurality of first protrusions 121 may be continuously distributed in the length direction of the extension 12, that is, the surfaces of two adjacent first protrusions 121 close to each other are connected to the same position of the extension 12, and the surfaces of two adjacent first protrusions 121 close to each other intersect on the extension 12. Therefore, the number of the first protrusions 121 can be increased within the same length of the extension section 12, thereby better dispersing the large-scale vortex flowing through the extension section 12 into small-scale vortex, improving the gas flowing state, reducing the energy loss of the flowing, and simultaneously reducing the noise.
Further, as shown in fig. 1, a plane perpendicular to the extension section 12 and passing through the central axis of the centrifugal wind wheel 20 is a reference plane, the first protrusion 121 on the extension section 12 farthest from the air outlet 23 may be located at an intersection position of the extension section 12 and the reference plane, and the first protrusion 121 closest to the air outlet 23 may be located at the air outlet 23 and may have a certain distance from the air outlet 23. This can improve the gas flow conditions even better.
In some embodiments of the present invention, as shown in fig. 2, the height of the first protrusion 121 is H1, and satisfies: h1 is more than 0.5mm and less than 0.1K, wherein K is the opening degree of the volute 1. Therefore, the large-scale vortex flowing through the extension section 12 can be better dispersed into small-scale vortex, the gas flowing state is improved, the flowing energy loss is reduced, and the noise is reduced.
It is understood that the height of the first protrusion 121 is the maximum height of the first protrusion 121. For example, when the cross-section of the first protrusion 121 is triangular, the height of the first protrusion 121 is the distance between the apex of the first protrusion 121 and the extension 12.
Further, K satisfies: k is more than or equal to 0.3D and less than or equal to 0.7D, wherein D is the diameter of the centrifugal wind wheel 20. Therefore, the large-scale vortex flowing through the extension section 12 can be better dispersed into small-scale vortex, the gas flowing state is improved, the flowing energy loss is reduced, and the noise is reduced.
Further, the height of the first protrusion 121 is H1, the maximum width of the first protrusion 121 is W1, and: 0.5H1 is not less than W1 is not less than 2H 1. Therefore, the large-scale vortex flowing through the extension section 12 can be better dispersed into small-scale vortex, the gas flowing state is improved, the flowing energy loss is reduced, and the noise is reduced.
In some embodiments of the present invention, the cross-section of the second protrusion 211 may be triangular, trapezoidal or rectangular, so as to increase the diversity of the structure of the second protrusion 211, and thus the diversity of the volute tongue 2, and thus the structure of the volute tongue assembly 10.
Wherein, when the cross section of the second protrusion 211 is triangular, the second protrusion 211 comprises three surfaces, one of which is located on the transition section 21, and the width of the second protrusion 211 gradually decreases from the end connected with the transition section 21 to the free end of the second protrusion 211. Further, the surface of the second protrusion 211 away from the air outlet 23 is inclined toward the direction away from the transition section 21 along the airflow flowing direction, so that the airflow can be guided, and noise reduction is facilitated.
When the cross section of the second protrusion 211 is trapezoidal, the second protrusion 211 includes four surfaces, one of the two opposite and parallel surfaces is located on the transition section 21, and the surface far away from the air outlet 23 of the other two opposite surfaces is inclined toward the direction far away from the transition section 21 along the airflow flowing direction, so that the airflow can be guided, and noise reduction is facilitated. Alternatively, the cross section of the second protrusion 211 may be an isosceles trapezoid, and the width of the second protrusion 211 gradually decreases in a direction from the end close to the transition section 21 to the free end of the second protrusion 211.
When the cross-section of the second protrusion 211 is rectangular, the second protrusion 211 includes four surfaces, one of the two opposing and parallel surfaces being located on the transition section 21.
Of course, the present invention is not limited thereto, and the cross section of the second protrusion 211 may also be other quadrangles such as a parallelogram or other irregular quadrangles or other polygons, etc.
As shown in fig. 3, when the width of the second protrusion 211 gradually decreases from the end connected to the transition section 21 to the free end of the second protrusion 211, the plurality of second protrusions 211 may be continuously distributed in the length direction of the transition section 21, that is, the surfaces of two adjacent second protrusions 211 close to each other are connected to the same position of the transition section 21, and the surfaces of two adjacent second protrusions 211 close to each other intersect on the transition section 21. Therefore, the number of the second protrusions 211 can be increased within the same length of the transition section 21, so that large-scale vortexes flowing through the transition section 21 can be dispersed into small-scale vortexes better, the gas flowing state is improved, the flowing energy loss is reduced, and meanwhile, the noise is reduced.
Further, as shown in fig. 1, a point on the transition section 21 that is the smallest distance from the centrifugal wind wheel 20 is a reference point, the second protrusion 211 on the transition section 21 that is farthest from the air outlet 23 may be located at the reference point, the second protrusion 211 that is closest to the air outlet 23 may be located at a connection point between the transition section 21 and the expansion section 22, and of course, the second protrusion 211 may also be located on the expansion section 22. This can improve the gas flow conditions even better.
In some embodiments of the present invention, as shown in fig. 3, the height of the second protrusion 211 is H2, and satisfies: h1 is more than 0.5mm and less than 0.2t, wherein t is the minimum distance between the transition section 21 and the centrifugal wind wheel 20. Therefore, the large-scale vortex flowing through the transition section 21 can be better dispersed into the small-scale vortex, the gas flowing state is improved, the flowing energy loss is reduced, and meanwhile, the noise is reduced.
It is understood that the height of the second protrusion 211 is the maximum height of the second protrusion 211. For example, when the cross-section of the second protrusion 211 is triangular, the height of the second protrusion 211 is the distance between the apex of the second protrusion 211 and the transition section 21.
Further, t satisfies: t is more than or equal to 0.05D and less than or equal to 0.1D, wherein D is the diameter of the centrifugal wind wheel 20. Therefore, the large-scale vortex flowing through the transition section 21 can be better dispersed into the small-scale vortex, the gas flowing state is improved, the flowing energy loss is reduced, and meanwhile, the noise is reduced.
Further, the height of the second protrusion 211 is H2, the maximum width of the second protrusion 211 is W2, and: 0.5H2 is not less than W2 is not less than 2H 2. Therefore, the large-scale vortex flowing through the transition section 21 can be better dispersed into the small-scale vortex, the gas flowing state is improved, the flowing energy loss is reduced, and meanwhile, the noise is reduced.
Alternatively, the transition section 21 may be a circular arc, and the radius of the transition section 21 may be 0.06D, where D is the diameter of the centrifugal wind wheel 20. The angle between the two second projections 211 that are farthest apart on the transition section 21 may be 30-70 degrees.
A centrifugal fan 100 according to an embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, a centrifugal fan 100 according to an embodiment of the present invention includes the above-mentioned volute tongue assembly 10 and a centrifugal fan 20, and the centrifugal fan 20 is disposed in a receiving cavity 111. The centrifugal wind wheel 20 rotates at a high speed to suck air into the centrifugal wind wheel 20 along the axial direction from the air inlet of the volute tongue assembly 10, the centrifugal wind wheel 20 provides kinetic energy for the air, the air flow is turned by 90 degrees, the air flow is blown out of the centrifugal wind wheel 20 along the radial direction and enters the accommodating cavity 111, the conversion from the kinetic energy to pressure energy is realized in the accommodating cavity 111, and finally the air flow is discharged out of the centrifugal fan 100 from the air outlet 23. Set up a plurality of first archs 121 on the extension 12 of spiral case 1, set up a plurality of second archs 211 on the changeover portion 21 of spiral case 2, can break up into the minor scale swirl with the major scale swirl that spiral case 1 back produced in the clearance of spiral case 2, improve the gas flow state, reduce and reduce energy loss, and then reduce centrifugal fan 100 noise.
According to the centrifugal fan 100 provided by the embodiment of the utility model, by arranging the volute tongue assembly 10, the surface of the extension section 12 facing the volute tongue 2 is provided with the first protrusions 121 spaced along the length direction of the extension section 12, each first protrusion 121 extends along the axial direction of the accommodating cavity 111, and/or the surface of the transition section 21 facing the extension section 12 is provided with the second protrusions 211 spaced along the length direction of the transition section 21, and each second protrusion 211 extends along the axial direction of the accommodating cavity 111, large-scale vortexes flowing through the extension section 12 and/or the transition section 21 can be dispersed into small-scale vortexes, the gas flowing state is improved, the energy loss of flowing is reduced, and meanwhile, noise is reduced.
An air conditioner according to an embodiment of the present invention is described below.
An air conditioner according to an embodiment of the present invention includes a housing and the centrifugal fan 100 described above.
Specifically, the housing may have an air inlet and an air outlet 23, and the centrifugal fan 100 is disposed in the housing to drive the air flow from the air inlet to the air outlet 23. In addition, a heat exchanger is arranged in the shell, and air flow entering the shell exchanges heat with the heat exchanger and then flows out of the air outlet 23, so that indoor refrigeration or heating is realized.
Alternatively, the air conditioner may be a hanging type air conditioner, a floor type air conditioner, a ducted air conditioner, a mobile air conditioner, a ceiling type air conditioner, a window type air conditioner, or the like, which is not limited herein.
Taking an air conditioner as an example of a duct machine, the duct machine adopts the centrifugal fan 100, the volute tongue assembly 10 of the centrifugal fan 100 is the volute tongue assembly 10, the extension section 12 of the volute 1 is provided with a plurality of first protrusions 121, and the transition section 21 of the volute tongue 2 is provided with a plurality of second protrusions 211. Corresponding test is carried out through tuber pipe machine and conventional tuber pipe machine to this application, wherein, in the experimentation, the tuber pipe machine's of this application parameter is the same with conventional tuber pipe machine's parameter, and the difference only lies in, the tuber pipe machine of this application has set up first arch 121 and second arch 211. The results of the experiment are shown in table 1:
TABLE 1
According to the test results, the following results are obtained: compared with a conventional air duct machine, the air volume is basically unchanged at the same rotating speed, and the noise of the air duct machine is reduced by about 1 dB.
According to the air conditioner of the embodiment of the utility model, by providing the centrifugal fan 100, the surface of the extension section 12 facing the volute tongue 2 is provided with the plurality of first protrusions 121 spaced along the length direction of the extension section 12, each first protrusion 121 extends along the axial direction of the accommodating cavity 111, and/or the surface of the transition section 21 facing the extension section 12 is provided with the plurality of second protrusions 211 spaced along the length direction of the transition section 21, each second protrusion 211 extends along the axial direction of the accommodating cavity 111, large-scale vortexes flowing through the extension section 12 and/or the transition section 21 can be broken up into small-scale vortexes, the gas flowing state is improved, the flowing energy loss is reduced, and the noise is reduced.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 utility model. 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.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A volute tongue assembly for a centrifugal fan, the centrifugal fan including a centrifugal rotor, the volute tongue assembly comprising:
the volute comprises a spiral section and an extension section, the spiral section defines a containing cavity for containing the centrifugal wind wheel, and the extension section is connected with one end of the spiral section;
the volute tongue comprises a transition section and an expansion section, the transition section is arc-shaped, one end of the transition section is connected with one end of the spiral section, one end of the expansion section is connected with the other end of the transition section and defines an air outlet with the extension section,
wherein the surface of the extension section facing the volute tongue is provided with a plurality of first protrusions spaced along the length direction of the extension section, and each first protrusion extends along the axial direction of the accommodating cavity;
and/or the surface of the transition section facing the extension section is provided with a plurality of second bulges spaced along the length direction of the transition section, and each second bulge extends along the axial direction of the accommodating cavity.
2. The volute tongue assembly of claim 1, wherein the first projection has a height H1 and satisfies: h1 is more than 0.5mm and less than 0.1K, wherein K is the opening degree of the volute.
3. The volute tongue assembly of claim 2, wherein K satisfies: k is more than or equal to 0.3D and less than or equal to 0.7D, wherein D is the diameter of the centrifugal wind wheel.
4. The volute tongue assembly of any of claims 1-3, wherein the first projection has a height H1, a maximum width W1, and satisfies: 0.5H1 is not less than W1 is not less than 2H 1.
5. The volute tongue assembly of claim 1, wherein the second projection has a height H2 and satisfies: h1 is more than 0.5mm and less than 0.2t, wherein t is the minimum distance between the transition section and the centrifugal wind wheel.
6. The volute tongue assembly of claim 5, wherein t satisfies: t is more than or equal to 0.05D and less than or equal to 0.1D, wherein D is the diameter of the centrifugal wind wheel.
7. The volute tongue assembly of claim 1, 5, or 6, wherein the second projection has a height H2 and a maximum width W2, and wherein: 0.5H2 is not less than W2 is not less than 2H 2.
8. The volute tongue assembly of claim 1, wherein the first projection has a cross-sectional shape that is triangular, trapezoidal, or rectangular,
and/or the cross section of the second bulge is triangular, trapezoidal or rectangular.
9. A centrifugal fan, comprising:
the volute tongue assembly of any of claims 1-8;
the centrifugal wind wheel is arranged in the accommodating cavity.
10. An air conditioner characterized by comprising the centrifugal fan according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346179.4U CN215672882U (en) | 2021-09-26 | 2021-09-26 | Volute tongue assembly, centrifugal fan and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346179.4U CN215672882U (en) | 2021-09-26 | 2021-09-26 | Volute tongue assembly, centrifugal fan and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN215672882U true CN215672882U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122346179.4U Active CN215672882U (en) | 2021-09-26 | 2021-09-26 | Volute tongue assembly, centrifugal fan and air conditioner |
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| Country | Link |
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| CN (1) | CN215672882U (en) |
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2021
- 2021-09-26 CN CN202122346179.4U patent/CN215672882U/en active Active
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