CN220706030U - Centrifugal fan blade, fresh air module and air conditioner - Google Patents

Abstract

The application provides a centrifugal fan blade, new trend module and air conditioner relates to centrifugal fan blade structure technical field. The centrifugal fan blade in this application includes solid fixed ring and a plurality of arc flabellum, through setting the scope of the entry angle with the flabellum to be greater than 90 degrees, and be less than or equal to 93 degrees to can effectively improve the flow of leaf way import department, reduce the air current separation, the vortex noise that produces when reducing the air-out, and reduce the amount of wind loss, improve the air output.

Description

Centrifugal fan blade, fresh air module and air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to a centrifugal fan blade and an air conditioner.

Background

With the improvement of living standard, people have higher and higher requirements on indoor air quality, and fresh air conditioners with relatively fire in the market in recent years are put into the life of the general public. In order to make the amount of wind of new trend air conditioner bigger, adopt centrifugal fan drive air current to flow in the current new trend air conditioner generally, but current centrifugal fan is at the during operation, and the flow separation of its internal air is comparatively serious, and the amount of wind loss is great, leads to the air conditioner to be showing in the vortex noise when operation to the air output is less, influences user experience.

Disclosure of Invention

The application provides a centrifugal fan blade, including solid fixed ring and a plurality of arc flabellum, a plurality of the flabellum be annular array ground set up in gu fixed ring intra-annular, and all with gu fixed ring fixed connection, the mean camber line of flabellum with the outer contour line of flabellum intersects in first intersection and second intersection, first intersection set up in the second intersection with between gu fixed ring's the central point, a plurality of first intersection encloses into an internal diameter circle jointly, the mean camber line be in tangent line of first intersection department with the internal diameter circle is in form the entrance angle between the tangent line of first intersection department, the scope of entrance angle is greater than 90 degrees, and is less than or equal to 93 degrees.

In one possible implementation manner of the present application, a plurality of second intersection points jointly enclose an outer diameter circle, the tangent line of the camber line at the second intersection point and the tangent line of the outer diameter circle at the second intersection point form an outlet angle, and the range of the outlet angle is 155 degrees to 158 degrees.

In one possible implementation of the present application, the diameter of the inner diameter circle is D1, and the diameter of the outer diameter circle is D2, wherein the ratio of D1 to D2 is 0.55 to 0.65.

In one possible implementation manner of the present application, the chord length of the fan blade is L, and the pitch of the fan blade is t, where the ratio of t to L is 0.15 to 0.30.

In one possible implementation manner of the present application, an airflow channel is formed between two adjacent fan blades, and the airflow channel includes a deceleration section and an acceleration section communicated with the deceleration section along the airflow direction, and the ratio of the deceleration section to the acceleration section is 0.30 to 0.36.

In one possible implementation of the present application, the ratio of the deceleration section to the acceleration section is 0.32 to 0.34.

In one possible implementation manner of the present application, the centrifugal fan blade further includes a wheel body, the fixing ring is disposed at intervals with the wheel body, and the fan blade is fixedly connected between the fixing ring and the wheel body.

In one possible implementation manner of the present application, a notch is provided at the top of the fan blade, and the notch is in an letter "L" shape.

The second aspect of the application provides a fresh air module, the fresh air module comprises a volute and centrifugal fan blades, and the centrifugal fan blades are arranged in the volute.

The third aspect of the application provides an air conditioner, which comprises the centrifugal fan blade or the fresh air module.

The range through the entry angle with the flabellum is set to be greater than 90 degrees in this application, and is less than or equal to 93 degrees to can effectively improve the flow of leaf way import department, reduce the air current separation, the vortex noise that produces when reducing the air-out, and reduce the amount of wind loss, improve the air-out.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of an embodiment of a centrifugal fan blade provided in an embodiment of the present application;

FIG. 2 is a front view of the centrifugal fan blade of FIG. 1;

FIG. 3 is a side view of the centrifugal fan blade of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is a schematic view of the inlet and outlet angles of a fan blade;

FIG. 6 is a schematic view of the chord length and pitch of a fan blade;

fig. 7 is a schematic diagram of the deceleration section and acceleration section of the airflow path.

Reference numerals: 100. centrifugal fan blades; 10. a fixing ring; 20. a fan blade; 21. an inner diameter circle; 22. an outer diameter circle; 23. an air flow channel; 24. a notch; 241. a side surface; 242. a bottom surface; 30. a wheel body; 31. a transmission part; 40. an air outlet; a. a first intersection point; b. a second intersection point; β1, entrance angle; β2, exit angle.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the utility model. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present utility model may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the utility model with unnecessary detail. Thus, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The centrifugal fan blade 100 is generally used in a centrifugal fan and is in driving connection with a driving motor. When the centrifugal fan blade 100 is in operation, the driving motor can drive the centrifugal fan blade 100 to rotate, so that the centrifugal fan blade 100 generates negative pressure and drives air to flow, and an air outlet airflow is formed. The inventor researches and discovers that when the conventional centrifugal fan blade 100 works, the flow separation of air in the conventional centrifugal fan blade is serious, the air quantity loss is large, the eddy noise is remarkable during operation, the air quantity is small, and the user experience is affected.

In view of the above problems of the conventional centrifugal fan blade 100, the present application provides a centrifugal fan blade 100 with a novel structure, and the centrifugal fan blade 100 can effectively improve the flow at the inlet of the blade channel, reduce the separation of air flow, reduce the vortex noise generated during the air outlet, reduce the air loss, and improve the air outlet.

The centrifugal fan blade 100 in the present application includes a fixed ring 10 and a plurality of arc-shaped fan blades 20. The plurality of fan blades 20 are disposed in the fixed ring 10 in a ring array, that is, the plurality of fan blades 20 are disposed in the fixed ring 10, and the plurality of fan blades 20 are uniformly distributed along the circumferential direction of the fixed ring 10. Each fan blade 20 is fixedly connected with the fixing ring 10, and illustratively, a plurality of fan blades 20 and the fixing ring 10 are integrally formed.

The mean camber line of the fan blade 20 intersects with the outer contour line of the fan blade 20 at a first intersection point a and a second intersection point b, the first intersection point a is disposed between the second intersection point b and the center point of the fixed ring 10, a plurality of first intersection points a jointly enclose an inner diameter circle 21, an entrance angle β1 is formed between a tangent line of the mean camber line at the first intersection point a and a tangent line of the inner diameter circle 21 at the first intersection point a, and the range of the entrance angle β1 is greater than 90 degrees and less than or equal to 93 degrees. The mean camber line refers to a line connecting midpoints of the upper and lower surfaces of the fan blade 20. The outer contour line refers to a portion where the surface of the fan blade 20 intersects the cross section.

In the application, the range of the inlet angle beta 1 of the fan blade 20 is set to be more than 90 degrees and less than or equal to 93 degrees, so that the flow of the inlet of the blade channel can be effectively improved, the separation of air flow is reduced, the vortex noise generated during air outlet is reduced, the air quantity loss is reduced, and the air outlet quantity is improved.

It should be emphasized that some researches indicate that the inlet angle β1 of the fan blade 20 can reduce the air flow separation and vortex noise between 85 degrees and 90 degrees, but the inventor finds that under the same condition, when the range of the inlet angle β1 is more than 90 degrees and less than or equal to 93 degrees, the air quantity of the centrifugal fan is equivalent, but the noise is reduced by about 1.5dB, and meanwhile, the sound quality is greatly improved; and the user experience is improved.

In some embodiments of the present application, the inlet angle β1 of the fan blade 20 may be 90.5 degrees, or 91 degrees, or 91.5 degrees, or 92 degrees, or 92.5 degrees, or 93 degrees.

In some embodiments of the present application, the plurality of second intersection points b together enclose an outer diameter circle 22, and the tangent line of the mean camber line at the second intersection point b forms an exit angle with the tangent line of the outer diameter circle 22 at the second intersection point b, and the exit angle ranges from 155 degrees to 158 degrees. The inventor researches and discovers that the range of the outlet angle is set to 155-158 degrees, so that the curvature of the fan blade 20 can be reduced as much as possible while the shrinkage coefficient of the blade path is increased, the stability of the blade path flow field is ensured, and the generation of vortex is reduced, thereby reducing the vortex noise generated during air outlet.

In some embodiments of the present application, the range of outlet angles is 155 degrees, or 155.5 degrees, or 156 degrees, or 156.5 degrees, or 157 degrees, or 157.5 degrees, or 158 degrees.

In some embodiments of the present application, the diameter of the inner diameter circle 21 is D1, and the diameter of the outer diameter circle 22 is D2, wherein the ratio of D1 to D2 is 0.55 to 0.65. By setting the ratio of D1 to D2 to 0.55 to 0.65 in this embodiment, the wind wheel can be made to have a relatively long chord length, thereby making it fully pressure-raised and resistant.

In some embodiments of the present application, the chord length of the fan blade 20 is L, and the pitch of the fan blade 20 is t, where the ratio of t to L (i.e., the relative pitch) is 0.15 to 0.30. In the embodiment, the relatively small pitch of the blades is arranged, so that the consistency of the blades is high, the generation of vortex in the blade flow channel can be effectively inhibited, and the flow loss is reduced.

In some embodiments of the present application, an airflow channel 23 is formed between two adjacent fan blades 20, and along the airflow direction, the airflow channel 23 includes a deceleration section L1 and an acceleration section L2 that is communicated with the deceleration section, and a ratio of the deceleration section L1 to the acceleration section L2 is 0.30 to 0.36. Further, the ratio of the deceleration section L1 to the acceleration section L2 is 0.32 to 0.34, and the ratio of the deceleration section to the acceleration section is 0.32, or 0.33, or 0.34, for example. In the embodiment, the ratio of the deceleration section to the acceleration section is set to be about 1/3, so that the speed distribution of wind in the blade runner is more uniform; effectively improving She Daona pneumatic load distribution; so that the maximum aerodynamic load is near the trailing edge. Effectively improve suction surface separation, improve fan efficiency.

In some embodiments of the present application, the centrifugal fan blade 100 further includes a wheel 30, the fixing ring 10 is disposed at a distance from the wheel 30, and the fan blade 20 is fixedly connected between the fixing ring 10 and the wheel 30. Specifically, the fixing ring 10 and the wheel body 30 are arranged in parallel at intervals, the fan blade 20 is fixedly connected between the fixing ring 10 and the wheel body 30, and the fixing ring 10 and the wheel body 30 cooperate to fix the relative position of the fan blade 20 and prevent the fan blade 20 from falling off. The fixed ring 10, the wheel body 30 and the adjacent two fan blades 20 jointly enclose an air outlet 40. During the rotation of the centrifugal fan blade 100, air enters from among the fan blades 20 along the axial direction of the centrifugal fan blade 100, and is blown out through the air outlets 40 at the same time, so as to realize the air outlet function of the centrifugal fan blade 100.

Specifically, the middle part of wheel body 30 is provided with drive portion 31, and drive portion 31 is protruding towards the direction that is close to solid fixed ring 10, and drive portion 31 is used for being connected with driving motor to improve centrifugal fan blade 100 and driving motor's reliability of being connected, and drive portion 31 can step down driving motor, with holding partial driving motor, thereby reduces the volume of whole centrifugal fan, is convenient for install and transportation.

In some embodiments of the present application, the top of the fan blade 20 (i.e., the side of the fan blade 20 near the transmission portion 31) is provided with a notch 24. In particular, the notch 24 is in the form of an "L" which is advantageous in preventing top leakage of the sectors. The distance between the side surface 241 of the notch 24 and the inscribed circle is 3 mm to 5 mm, and the distance between the bottom surface 242 of the notch 24 and the plane of the fixing ring 10 is 4 mm to 6 mm.

The embodiment of the application also provides a new trend module, and this new trend module can be used to the new trend air conditioner so that the air conditioner has new trend function. Specifically, the fresh air module comprises a fresh air pipe, an air inlet cover, a filter net rack, an upper volute, a lower volute and a centrifugal fan. The centrifugal fan comprises centrifugal fan blades. The fresh air pipe is used for communicating outdoor air with the air inlet cover, and the air inlet cover is communicated with the fresh air channel. The upper volute and the lower volute are connected to form a complete fresh air duct, and the centrifugal fan is fixed in the fresh air duct. It should be noted that the specific structures of the new air pipe, the air inlet cover, the filter screen frame, the upper volute and the lower volute do not belong to the improvement points of the present application, and are not described herein.

The embodiment of the application also provides a fresh air conditioner which comprises the fresh air module or the centrifugal fan blade. It should be noted that the fresh air conditioner may be a wall-mounted machine, a cabinet machine, or an air duct machine, which is not limited herein.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations of the present application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this application, and are therefore within the spirit and scope of the exemplary embodiments of this application.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.

Likewise, it should be noted that in order to simplify the presentation disclosed herein and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.

The centrifugal fan blade, the fresh air module and the air conditioner provided by the embodiment of the application are described in detail, and specific examples are applied to the description of the principle and the implementation mode of the utility model, and the description of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (10)

1. The utility model provides a centrifugal fan blade, its characterized in that includes solid fixed ring and a plurality of arc flabellum, a plurality of the flabellum be annular array ground set up in the solid fixed ring, and all with solid fixed ring fixed connection, the mean camber line of flabellum with the outer profile line of flabellum intersects in first intersection and second intersection, first intersection set up in the second intersection with between the central point of solid fixed ring, a plurality of first intersection encloses into an internal diameter circle jointly, the mean camber line is in tangent line of first intersection department with the internal diameter circle is in form the entrance angle between the tangent line of first intersection department, the scope of entrance angle is greater than 90 degrees, and is less than or equal to 93 degrees.

2. The centrifugal fan blade according to claim 1, wherein a plurality of the second intersecting points together define an outer diameter circle, and the tangent line of the camber line at the second intersecting point and the tangent line of the outer diameter circle at the second intersecting point form an outlet angle, and the outlet angle ranges from 155 degrees to 158 degrees.

3. The centrifugal fan blade according to claim 2, wherein the diameter of the inner diameter circle is D1, the diameter of the outer diameter circle is D2, and the ratio of D1 to D2 is 0.55 to 0.65.

4. A centrifugal fan blade according to claim 3, wherein the chord length of the fan blade is L, the pitch of the fan blade is t, and the ratio of t to L is 0.15 to 0.30.

5. The centrifugal fan blade according to claim 1, wherein an airflow channel is formed between two adjacent fan blades, and the airflow channel comprises a deceleration section and an acceleration section communicated with the deceleration section along the airflow direction, and the ratio of the deceleration section to the acceleration section is 0.30-0.36.

6. The centrifugal fan blade according to claim 5, wherein the ratio of the deceleration section to the acceleration section is 0.32 to 0.34.

7. The centrifugal fan blade according to claim 1, further comprising a wheel body, wherein the fixing ring is spaced from the wheel body, and the fan blade is fixedly connected between the fixing ring and the wheel body.

8. The centrifugal fan blade according to claim 1, wherein a notch is formed in the top of the fan blade, and the notch is in an L shape.

9. A fresh air module, characterized in that it comprises a volute and a centrifugal fan blade according to any one of claims 1 to 8, said centrifugal fan blade being arranged in said volute.

10. An air conditioner, characterized in that it comprises a centrifugal fan blade according to any one of claims 1 to 8 or a fresh air module according to claim 9.