Volute tongue, fan and air conditioner indoor unit

Abstract

The utility model relates to a volute tongue, a draught fan and an air conditioner indoor unit, the volute tongue comprises a volute tongue body and a plurality of microstructures arranged on the volute tongue body, the multiple microstructures are arranged in the first direction and the second direction at intervals, the first direction is the air outlet direction, the second direction is orthogonal to the first direction, the microstructures are in a conical shape, and the microstructures are arranged on the volute tongue body. The two arc-shaped slopes are symmetrically arranged in the second direction. According to the technical scheme, the vortex can be reduced, the efficiency of the fan can be improved, the operation cost can be reduced, and the noise level of the fan can be reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of air conditioning equipment, in particular to a volute tongue, a fan and an air conditioner indoor unit. BACKGROUND

[0002] As an important fluid conveying equipment, centrifugal fan is widely used in industrial production and daily life. However, the volute tongue, as an important structure of the centrifugal fan, plays a role in guiding airflow and preventing airflow from circulating in the fan volute. However, the volute tongue often becomes the main position of vortex, resulting in low efficiency and noise increase of the fan. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the problems in the related art, the present disclosure provides a volute tongue, a fan and an air conditioner indoor unit.

[0004] According to a first aspect of the embodiments of the present disclosure, a volute tongue is provided, comprising: a volute tongue body and a plurality of microstructures arranged on the volute tongue body, the plurality of microstructures are respectively arranged along a first direction and a second direction, the first direction is an air outlet direction, and the second direction is orthogonal to the first direction, wherein the microstructure is conical and has two arc-shaped slope surfaces symmetrically arranged in the second direction.

[0005] Optionally, the two slope surfaces form a meeting line, the meeting line extends along the first direction, wherein the vertical distance from the meeting line to the surface of the volute tongue body of the microstructure is 2mm-15mm; the horizontal distance between the two outer side edges of the microstructure in the second direction is 90mm-110mm; and the horizontal distance between the two side edges of the microstructure in the first direction is 0mm-20mm.

[0006] Optionally, in the second direction, the horizontal distance between the two meeting lines of the adjacent two microstructures is 90mm-110mm; in the first direction, the horizontal distance between the two side edges of the adjacent two microstructures facing each other is 0mm-20mm.

[0007] Optionally, the plurality of microstructures are uniformly distributed on the volute tongue body.

[0008] Optionally, the shapes and sizes of the plurality of microstructures are the same.

[0009] Optionally, the microstructure and the volute tongue body are configured as an integral structure.

[0010] Optionally, the plurality of microstructures are arranged in alignment in the first direction and the second direction; or the plurality of microstructures are arranged in alignment in one of the first direction and the second direction, and staggered in the other direction.

[0011] According to a second aspect of the embodiments of the present disclosure, a fan is provided, comprising a volute and a volute tongue arranged at an air outlet of the volute, the volute tongue being any one of the volute tongues described above.

[0012] Optionally, the fan is a double-suction multi-blade centrifugal fan.

[0013] According to a third aspect of the embodiments of the present disclosure, an indoor unit of an air conditioner is provided, comprising the fan described above.

[0014] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects: the volute tongue provided by the present disclosure comprises a plurality of microstructures arranged on the volute tongue body, wherein the microstructures are conical and have two arc-shaped slope surfaces symmetrically arranged in a second direction. Specifically, mantis shrimp is a kind of marine organism and often travels in sand and stone, and its unique shell structure provides excellent impact resistance and drag reduction performance. The microstructure with arc-shaped slope surface provided by the present disclosure is extracted based on the shell surface characteristics of mantis shrimp, can suppress the vortex formed by the flow, break the large-scale vortex into small-scale vortex by separating the flow, and can inhibit the development of vortex flow in the multi-layer microstructure, thereby reducing the vortex flow, improving the efficiency of the fan, reducing the operation cost, and reducing the noise level of the fan due to the reduction of the interaction between the fluid and the volute tongue.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0017] Figure 1 is a structural schematic diagram of a fan according to an exemplary embodiment.

[0018] Figure 2 is a structural schematic diagram of a volute tongue according to an exemplary embodiment.

[0019] Figure 3 is Figure 2 a side view of the volute tongue.

[0020] Figure 4 is Figure 2 a front view of the volute tongue.

[0021] Figure 5 is a feature extraction schematic diagram of a bionic structure according to an exemplary embodiment.

[0022] REFERENCE SIGNS

[0023] 100 - volute tongue, 200 - volute, 1 - volute tongue body, 2 - microstructure, 21 - arc surface, 22 - intersection line. DETAILED DESCRIPTION

[0024] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent similar or analogous elements. The following exemplary embodiments described therein represent the best known uses of the present disclosure. However, the described embodiments are merely examples in accordance with some aspects of the present disclosure, as detailed in the appended claims.

[0025] As Figures 1 to 4 shown, the exemplary embodiments of the present disclosure provide a volute tongue 100. The volute tongue 100 can be applied to a fan, and further, can be applied to a fan of an air conditioning indoor unit or the like air conditioning device.

[0026] Specifically, the volute tongue 100 provided by the present disclosure includes a volute tongue body 1 and a plurality of microstructures 2 disposed on the volute tongue body 1, the plurality of microstructures 2 are respectively disposed along a first direction and a second direction, the first direction is an air outlet direction, and the second direction is orthogonal to the first direction, wherein the microstructure 2 is conical and has two arc-shaped slope surfaces 21 symmetrically disposed in the second direction.

[0027] The microstructure 2 is disposed on a surface of the volute tongue body 1 facing the air flow of the fan, and the microstructure 2 can be integrally formed on the volute tongue body 1 in a manner of injection molding or compression molding, which is beneficial to improve the structural stability of the microstructure 2 during the operation of the fan and avoid falling off. The first direction is the air outlet direction, that is, the direction from the incoming flow to the outward blowing, and the volute tongue 100 is generally in the form of a strip, and the second direction is the length direction of the volute tongue 100.

[0028] With the continuous exploration of natural organisms, organisms living in fluid impact environment have evolved for hundreds of millions of years and have extremely strong friction reduction and wear resistance. Special geometric non-smooth patterns are distributed on the key parts of these organisms that resist wear. For example, mantis shrimp is a kind of marine organism and often travels in sand and stone. Its unique shell structure provides excellent impact resistance and drag reduction performance. As Figure 5 shown, by extracting the characteristics of the outer shell of the mantis shrimp body surface, it is found that the cross-sectional shape is conical and has an arc-shaped slope surface inwardly recessed.

[0029] The microstructure 2 provided by the present disclosure is extracted based on the shell surface characteristics of the mantis shrimp, that is, the microstructure 2 imitates the non-smooth characteristics of the mantis shrimp surface and is conical, and the microstructure 2 has two arc-shaped slope surfaces 21 symmetrically disposed in the second direction.

[0030] By setting the microstructure 2 based on the shell surface feature extraction of mantis shrimp on the volute tongue body 1, the vortex formed by the flow can be inhibited, the large-scale vortex is broken into small-scale vortex by separating the flow, and the development of vortex flow is inhibited in the multi-layer microstructure 2, thereby realizing the reduction of vortex flow, improving the efficiency of the fan, reducing the operation cost, and reducing the noise level of the fan due to the reduction of the interaction between the fluid and the volute tongue 100. The multi-layer structure refers to the multiple microstructures 2 arranged at intervals in the first direction.

[0031] The size and distribution density of the microstructure 2 can affect the vortex inhibition effect of the microstructure 2.

[0032] Meanwhile, referring to Figure 3 and Figure 4 In some embodiments, the two slope surfaces 21 form an intersection line 22, and the intersection line 22 extends along the first direction, wherein the vertical distance h from the intersection line 22 to the surface of the volute tongue body 1 is 2mm-15mm; the horizontal distance d between the two bottom edges of the slope surfaces 21 of the microstructure 2 in the second direction is 90mm-110mm; and the horizontal distance W between the two side edges of the microstructure 2 in the first direction is 0mm-20mm. Wherein, the vertical distance h from the intersection line 22 to the surface of the volute tongue body 1 of the microstructure 2 can be understood as the height of the microstructure 2, the horizontal distance d between the two bottom edges of the slope surfaces 21 of the microstructure 2 in the second direction can be understood as the length of the microstructure 2 in the second direction, and the horizontal distance W between the two side edges of the microstructure 2 in the first direction can be understood as the width of the microstructure 2 in the first direction. By setting the size of the microstructure 2 within a reasonable size range, neither the size is too large to have a negative impact on the efficiency of the fan, nor the size is too small to achieve the purpose of reducing the vortex flow by breaking the large-scale vortex into small-scale vortex. It should be noted that the intersection line 22 refers to the line extending along the first direction formed by the intersection of the two slope surfaces 21 extending upward from the surface of the volute tongue body 1.

[0033] In other embodiments, for the distribution density, referring to Figure 3 and Figure 4In the second direction, the horizontal distance D between two adjacent microstructures 2 at the intersection line 22 is 10 mm to 20 mm; in the first direction, the horizontal distance L between the two facing side edges of two adjacent microstructures 2 is 0 mm to 20 mm. That is, by limiting the distances between two adjacent microstructures 2 in the first and second directions, a reasonable density range of microstructures can be obtained. Eddies are typically generated between the slopes 21 of two adjacent microstructures 2. Therefore, a reasonable distribution density of microstructures 2 is beneficial for further breaking down large-scale eddies into smaller-scale eddies, thereby suppressing eddy generation, improving wind turbine efficiency, reducing operating costs, and further reducing wind turbine noise levels.

[0034] like Figures 2 to 4 As shown, in some embodiments, multiple microstructures 2 are evenly distributed on the volute tongue body 1, which helps to break large-scale vortices into more uniform small-scale vortices, thereby better suppressing the development of vortices. In other embodiments, multiple microstructures 2 have the same shape and size. This also helps to break large-scale vortices into more uniform small-scale vortices, better suppressing the development of vortices, reducing vortices, improving the efficiency of the fan, and reducing noise levels. It should be noted that, depending on actual needs, in other embodiments, the microstructures 2 can also be arranged on the volute tongue body 1 with a non-uniform density distribution, and the shape and size of the microstructures 2 can also be different, which will not be elaborated here.

[0035] Furthermore, in some embodiments, multiple microstructures 2 are aligned in both the first and second directions. Alternatively, multiple microstructures 2 may be aligned in one of the first and second directions, but staggered in the other direction. For example, multiple microstructures 2 may be aligned in the first direction and staggered in the second direction, or multiple microstructures 2 may be staggered in the first direction and aligned in the second direction. Here, staggered arrangement means that the multiple microstructures 2 are not on the same straight line in a certain direction. Parameters such as the number of microstructures 2, the distance between two adjacent microstructures 2, and the angle of stagger can be set according to actual needs, and this disclosure does not impose any limitations on this.

[0036] According to a second aspect of the embodiments of this disclosure, a fan is also provided, such as... Figure 1 The fan includes a volute 200 and a volute tongue 100 disposed at the air outlet of the volute 200. The volute tongue 100 is the volute tongue in any of the above embodiments and has all its beneficial effects, which will not be elaborated here. The fan can be, for example, a centrifugal fan, and more specifically, a double-suction multi-blade centrifugal fan.

[0037] According to a third aspect of the present disclosure, an indoor air conditioning unit is also provided, including the fan of any of the above-mentioned embodiments.

[0038] In the detailed description above, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration specific aspects in which the disclosure can be practiced. In this regard, directional terminology, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and other commonly used terms, are used herein for the purpose of illustration only and are not intended to be limiting. Because the described devices can be positioned in a number of different orientations, the directional terminology can be used for illustration purposes only and is not limiting. It is to be understood that other aspects can be utilized and structural or logical changes can be made without departing from the scope of the present disclosure. The following detailed description, therefore, is not to be taken in a limiting sense.

[0039] It is to be understood that the features of the various aspects of the disclosure described herein can be combined with each other, unless specifically noted otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items; similarly, "at least one of' includes any and all combinations of one or more of the associated listed items.

[0040] It should be understood that, unless otherwise specifically stated and limited, the terms "joined," "attached," "mounted," "connected," "fixed," and terms of similar meaning in the embodiments of the disclosure adopted herein should be construed in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. The specific meaning of the above terms in this article can be understood according to the specific circumstances by those skilled in the art.

[0041] In addition, the word "over" as used in reference to a component, element, or material layer being "over" another component, element, or material layer in the specification and claims herein is used to mean that the component, element, or material layer is positioned or disposed over the referenced component, element, or material layer in an "indirect" manner such that one or more additional components, elements, or layers can be arranged between the referenced component, element, or material layer and the component, element, or material layer. However, the word "over" as used in reference to a component, element, or material layer being "over" another component, element, or material layer in the specification and claims herein can optionally also have the specific meaning of the component, element, or material layer being positioned or disposed "directly" over the referenced component, element, or material layer, e.g., in direct contact with the referenced component, element, or material layer.

[0042] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0044] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0045] Likewise, although the present disclosure has been described and illustrated with respect to one or more implementations, equivalent alterations and modifications will become apparent to those skilled in the art that do not depart from the true spirit and scope of the disclosure. The present disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms (including a reference to a "means") used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the described function (e.g., a functional equivalent), even though not structurally equivalent to the disclosed structure. In addition, although a particular feature of the disclosure can have been disclosed with respect to only one of several implementations, other implementations can include the particular feature. For example, the disclosure can be implemented with respect to other implementations that incorporate the particular feature, and that implement other features as disclosed herein, and each of the various implementations have a reasonable expectation of support. Furthermore, to the extent that the terms "includes", "including", "has", "have", "having", or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0046] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features of the disclosure disclosed herein. It is intended that the present disclosure be considered as including any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such steps, compositions, components, and / or elements known in the art to be appropriate. The specification and examples given are considered exemplary only and the true scope and spirit of the disclosure is indicated by the appended claims.

[0047] It is to be understood that the present disclosure is not limited to the precise construction described and illustrated above and that various modifications and changes can be made therein without departing from the scope of the present disclosure. The scope of the present disclosure is limited only by the claims appended hereto.

Claims

1. A volute tongue, characterized by, The volute tongue comprises a volute tongue body and a plurality of microstructures arranged on the volute tongue body, the plurality of microstructures are respectively arranged along a first direction and a second direction, the first direction is an air outlet direction, and the second direction is orthogonal to the first direction, wherein the microstructure is conical and has two arc-shaped slope surfaces symmetrically arranged in the second direction. The two slope surfaces form an intersection line, and the intersection line extends along the first direction, wherein the vertical distance from the intersection line to the surface of the volute tongue body is 2mm-15mm, the horizontal distance between the two bottom edges of the slope surfaces in the second direction is 90mm-110mm, and the horizontal distance between the two side edges of the microstructure in the first direction is 0mm-20mm.

2. The volute tongue according to claim 1, wherein In the second direction, the horizontal distance between the two adjacent microstructures at the intersection line is 90mm-110mm, and in the first direction, the horizontal distance between the two side edges of the adjacent microstructures facing each other is 0mm-20mm.

3. The volute tongue of claim 2, wherein, The plurality of microstructures are uniformly distributed on the volute tongue body.

4. The volute tongue of claim 1, wherein, The shapes and sizes of the plurality of microstructures are the same.

5. The volute tongue of claim 1, wherein, The microstructure and the volute tongue body are configured as an integral structure.

6. The volute tongue of claim 1, wherein, The plurality of microstructures are arranged in alignment in the first direction and the second direction, or the plurality of microstructures are arranged in alignment in one of the first direction and the second direction, and staggered in the other direction.

7. The volute tongue of claim 1, wherein, The volute comprises a volute shell and a volute tongue arranged at the air outlet of the volute shell, and the volute tongue is the volute tongue according to any one of claims 1-7.

8. A fan, characterized by The fan is a double-suction multi-wing centrifugal fan.

9. The fan of claim 8, wherein, The fan according to claim 8 or 9.

10. An air conditioner indoor unit, characterized by comprising: ​

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