Volute tongue, fan and air conditioner indoor unit

Abstract

The utility model provides a volute tongue, a fan and an air conditioner indoor unit. The volute tongue includes a housing. A noise reduction cavity is defined in the shell, and a plurality of noise reduction holes communicating with the noise reduction cavity are formed in the shell. And each noise reduction hole is bent and extends into the noise reduction cavity from the outer side of the shell. When the fan works, noise enters the noise reduction cavity through the noise reduction holes and then is reflected in the noise reduction cavity, so that the noise is weakened, the noise generated when the fan works is reduced, and the use experience of a user is improved. Moreover, the bent and extended noise reduction hole structure not only can improve the reflection frequency of noise in the noise reduction hole and improve the noise reduction effect, but also enhances the structural strength of the shell, and meanwhile, the bent design of the noise reduction hole also prevents external sundries from directly entering the noise reduction cavity, so that the stability of the noise reduction effect of the volute tongue is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technology field especially is related to a volute tongue, fan and air conditioning indoor unit. BACKGROUND

[0002] Air conditioner as the important equipment of adjusting indoor temperature, humidity has been widely used in family, office place and so on various environment. The volute tongue in the air conditioning indoor unit of existing air conditioner usually adopts arc or right angle design, the airflow that fan works blows is easy to separate when passing through the volute tongue, forms vortex, leads to airflow pressure fluctuation, and then makes the noise of fan work bigger, influences user use experience. SUMMARY

[0003] In view of above problem, the utility model is provided to overcome above problem or at least partially solve above problem volute tongue, fan and air conditioning indoor unit, can reduce the noise of fan work, reach the purpose of improving user use experience.

[0004] Specifically, the utility model provides a volute tongue, including shell,

[0005] The shell is limited with the noise reduction cavity, and the shell is provided with a plurality of noise reduction holes that are communicated with the noise reduction cavity.

[0006] Each noise reduction hole is bent and extends from the outside of the shell to the noise reduction cavity.

[0007] Optionally, the volute tongue is configured to work with the wind wheel.

[0008] Each noise reduction hole is a strip-shaped hole extending along the axis direction of the wind wheel, and each noise reduction hole is arranged on the surface of the shell facing the wind wheel.

[0009] Optionally, two opposite sides of each noise reduction hole are arranged in parallel. And each side comprises:

[0010] A first arc region, the outer end of the first arc region is connected to the outer surface of the shell.

[0011] Second arc region, the inner end of the second arc region is connected to the cavity wall of the noise reduction cavity.

[0012] The inner end of the first arc region is connected with the outer end of the second arc region. The arch direction of the first arc region is opposite to the arch direction of the second arc region.

[0013] Optionally, the volute tongue is configured to form an air duct. The end of the housing facing the impeller, near the fan outlet in the air duct, is the front end of the housing facing the impeller. The other end of the housing facing the impeller is the rear end of the housing facing the impeller.

[0014] The outer end opening of each of the noise reduction holes faces the rear end of the surface of the housing facing the wind turbine.

[0015] Optionally, the width of each noise reduction aperture is 1 / 3 to 2 / 3 of the interval between two adjacent noise reduction apertures.

[0016] Optionally, the radius of the first arc-shaped region is equal to the radius of the second arc-shaped region.

[0017] The width of each noise reduction aperture is 7 / 12 to 3 / 4 of the radius of the first arc-shaped region.

[0018] The central angle of the first arc-shaped region is 60° to 70°. The central angle of the second arc-shaped region is 60° to 70°.

[0019] Optionally, the radius of the first arc-shaped region is equal to the radius of the second arc-shaped region.

[0020] The front end of the surface of the housing facing the wind turbine is connected to an arc-shaped surface.

[0021] The radius of the first arc-shaped region is 1 / 8 to 1 / 5 of the radius of the arc-shaped surface.

[0022] Optionally, the noise reduction cavity is provided with sound-absorbing material.

[0023] This utility model provides a fan, which is a centrifugal fan or a cross-flow fan, including the aforementioned volute.

[0024] This utility model provides an indoor air conditioning unit, including the aforementioned fan.

[0025] In the volute of this invention, noise enters the noise reduction cavity through the noise reduction hole and is then reflected within the noise reduction cavity, thereby weakening the noise and effectively reducing the noise during the operation of the fan, thus improving the user experience.

[0026] Moreover, the bent and extended noise reduction hole structure not only increases the number of times noise is reflected within the noise reduction hole, thus improving the noise reduction effect, but also enhances the structural strength of the shell. At the same time, the bent design of the noise reduction hole also prevents external debris from directly entering the noise reduction cavity, ensuring the stability of the noise reduction effect of the volute tongue.

[0027] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0028] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0029] Figure 1 This is a schematic structural diagram of the volute tongue according to an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 yes Figure 2 Enlarged view of point B in the middle;

[0032] Figure 4 This is a schematic structural diagram of a fan according to an embodiment of the present utility model;

[0033] Figure 5 This is a schematic exploded view of a fan according to an embodiment of the present invention.

[0034] List of reference numerals in the attached diagram:

[0035] 1. Shell;

[0036] 100. Noise reduction cavity; 110. Sound-absorbing material; 200. Noise reduction hole; 210. First arc-shaped area; 220. Second arc-shaped area; 300. Arc-shaped surface;

[0037] 2. Wind turbine; 3. Air duct; 4. Volute; 5. First cover plate; 6. Second cover plate; 7. Fan outlet. Detailed Implementation

[0038] The following reference Figures 1 to 5This description describes a volute, a fan, and an indoor air conditioning unit according to embodiments of the present invention. In this description, it should be understood that 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0039] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Figure 1 This is a schematic structural diagram of the volute tongue according to an embodiment of the present invention, as shown below.Figure 1 As shown, and refer to Figures 2 to 5 This utility model embodiment provides a volute tongue, including a shell 1.

[0043] The housing 1 has a noise reduction cavity 100 defined inside, and the housing 1 has a plurality of noise reduction holes 200 communicating with the noise reduction cavity 100.

[0044] Each noise reduction hole 200 extends from the outside of the housing 1 into the noise reduction cavity 100 by bending.

[0045] Among them, the shell 1 forms the end of the volute tongue that is close to the impeller 2 and the air duct 3.

[0046] When the fan is working, the airflow flows through the air duct 3 towards the fan outlet 7. As the airflow passes the volute, it easily separates on both sides, even forming vortices, leading to airflow pressure fluctuations and generating noise during operation. Since a significant amount of noise is generated at the volute and emitted outside the fan, in this embodiment, most of the noise enters the noise reduction cavity 100 through the noise reduction hole 200 and is then reflected within the noise reduction cavity 100, thus attenuating the noise and effectively reducing the noise during fan operation, improving the user experience.

[0047] Moreover, the bent and extended noise reduction hole 200 structure can not only increase the number of times noise is reflected in the noise reduction hole 200 and improve the noise reduction effect, but also enhance the structural strength of the shell 1. At the same time, the bent design of the noise reduction hole 200 also prevents external debris from directly entering the noise reduction cavity 100, ensuring the stability of the noise reduction effect of the volute tongue.

[0048] The volute of this invention is applicable to various types of fans, such as centrifugal fans and cross-flow fans.

[0049] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the volute tongue is configured to work in conjunction with the impeller 2.

[0050] Each noise reduction hole 200 is a strip-shaped hole extending along the axial direction of the impeller 2, and each noise reduction hole 200 is disposed on the surface of the housing 1 facing the impeller 2.

[0051] In this embodiment, the strip-shaped hole extends along the axial direction of the impeller 2, making the opening of the noise reduction hole 200 larger, which increases the probability of noise passing through the noise reduction hole 200 and entering the noise reduction cavity 100, thereby improving the noise reduction effect.

[0052] Furthermore, the noise reduction hole 200 is designed to face the wind turbine 2, which allows more noise to enter the noise reduction cavity 100 through the noise reduction hole 200, thereby further improving the noise reduction effect.

[0053] In some embodiments of this utility model, such as Figure 2and Figure 3 As shown, the two oppositely arranged sides of each noise reduction aperture 200 are arranged in parallel. Each side includes a first arc-shaped region 210 and a second arc-shaped region 220.

[0054] The outer end of the first arc-shaped region 210 is connected to the outer surface of the housing 1.

[0055] The inner end of the second arc-shaped region 220 is connected to the cavity wall of the noise reduction cavity 100.

[0056] The inner end of the first arc-shaped region 210 is connected to the outer end of the second arc-shaped region 220. The arching direction of the first arc-shaped region 210 is opposite to the arching direction of the second arc-shaped region 220.

[0057] In this embodiment, the side of the noise reduction hole 200 is provided with two arc-shaped structures with opposite arching directions, namely the first arc-shaped region 210 and the second arc-shaped region 220, so that when noise passes through the noise reduction hole 200, it undergoes multiple reflections within the noise reduction hole 200, thereby improving the noise reduction effect. Moreover, the arc-shaped structure is easy to form, reducing production costs.

[0058] In some embodiments of this utility model, such as Figure 1 As shown, the volute is configured to form the air duct 3. One end of the surface of the housing 1 facing the impeller 2, near the air duct 3, is the front end of the surface of the housing 1 facing the impeller 2. The other end of the surface of the housing 1 facing the impeller 2 is the rear end of the surface of the housing 1 facing the impeller 2.

[0059] The outer opening of each noise reduction hole 200 faces the rear end of the surface of the housing 1 facing the impeller 2.

[0060] When the impeller 2 is working, it causes the airflow to flow towards the fan outlet 7 in the air duct 3. In this embodiment, the outer end opening of the noise reduction hole 200 is set to the rear, that is, to the side away from the air duct 3, so as to avoid the airflow from entering the noise reduction cavity 100 through the noise reduction hole 200 when passing through the volute tongue, thereby ensuring the normal flow of airflow and the normal operation of the fan.

[0061] In some embodiments of this utility model, such as Figure 3 As shown, the width H of each noise reduction aperture 200 is 1 / 3 to 2 / 3 of the interval D between two adjacent noise reduction apertures 200.

[0062] In this embodiment, when the width H of each noise reduction hole 200 is less than 1 / 3 of the interval D between two adjacent noise reduction holes 200, the width H of the noise reduction hole 200 is too small. Although the strength of the volute tongue is high, the sound absorption effect will be limited due to the small pore size.

[0063] When the width H of each noise reduction hole 200 is greater than 2 / 3 of the interval D between two adjacent noise reduction holes 200, the width H of the noise reduction hole 200 is too large, which will lead to insufficient local strength of the volute tongue and thus affect the reliability of the fan.

[0064] By setting the width H of the noise reduction hole 200 to 1 / 3 to 2 / 3 of the interval D between two adjacent noise reduction holes 200, the sound absorption effect can be maximized while ensuring the strength of the volute tongue, thereby effectively reducing the noise generated during the operation of the fan.

[0065] Preferably, in some embodiments of the present invention, the width H of each noise reduction hole 200 is 1 / 2 of the interval D between two adjacent noise reduction holes 200.

[0066] In some embodiments of this utility model, such as Figure 3 As shown, the radius R1 of the first arc-shaped region 210 is equal to the radius R2 of the second arc-shaped region 220.

[0067] The width H of each noise reduction aperture 200 is 7 / 12 to 3 / 4 of the radius R1 of the first arc-shaped region 210.

[0068] The central angle of the first arc-shaped region 210 is 60° to 70°. The central angle of the second arc-shaped region 220 is 60° to 70°.

[0069] In this embodiment, the central angle of the first arc-shaped region 210 and the second arc-shaped region 220 is set to 60° to 70°. Compared with the case where the central angle is greater than 70°, this embodiment can avoid the turbulence phenomenon of airflow in the volute tongue region caused by the excessive central angle. Compared with the case where the central angle is less than 60°, this embodiment increases the reflection path of noise in the noise reduction hole 200 and improves the noise reduction effect.

[0070] When the width H of the noise reduction hole 200 is greater than 3 / 4 of the radius R1 of the first arc-shaped region 210, the width H of the noise reduction hole 200 is relatively large. Although this helps improve the sound absorption effect, it reduces the structural strength of the volute tongue. When the width H of the noise reduction hole 200 is less than 7 / 12 of the radius R1 of the first arc-shaped region 210, the width H of the noise reduction hole 200 is relatively small, making it difficult for noise to pass through the noise reduction hole 200, thus affecting the noise reduction performance of the volute tongue. Setting the width H of the noise reduction hole 200 to 7 / 12 to 3 / 4 of the radius R1 of the first arc-shaped region 210 allows the volute tongue to balance noise reduction effect and structural strength.

[0071] Preferably, in some embodiments of the present invention, the width H of each noise reduction hole 200 is 2 / 3 of the radius R1 of the first arc-shaped region 210.

[0072] In some embodiments of this utility model, such as Figure 2 andFigure 3 As shown, the radius R1 of the first arc-shaped region 210 is equal to the radius R2 of the second arc-shaped region 220.

[0073] An arc-shaped surface 300 is connected to the front end of the surface of the housing 1 facing the impeller 2.

[0074] The radius R1 of the first arc-shaped region 210 is 1 / 8 to 1 / 5 of the radius R3 of the arc-shaped surface 300.

[0075] In this embodiment, the radius R1 of the first arc-shaped region 210 is 1 / 8 to 1 / 5 of the radius of the arc-shaped surface 300, so as to reduce the airflow resistance while ensuring the strength of the volute tongue.

[0076] The arc surface 300 and the volute tongue are connected by a smooth transition curved surface, which avoids airflow separation caused by structural abrupt changes and reduces the noise generated during fan operation.

[0077] Preferably, in some embodiments of the present invention, the radius R1 of the first arc-shaped region 210 is 3 / 16 of the radius R3 of the arc-shaped surface 300.

[0078] In some embodiments of this utility model, such as Figure 2 As shown, a sound-absorbing material 110 is provided inside the noise reduction cavity 100.

[0079] In this embodiment, after noise enters the noise reduction cavity 100, it comes into contact with and rubs against the sound-absorbing material 110, so that the sound-absorbing material 110 can absorb the sound wave energy and improve the noise reduction effect of the volute tongue.

[0080] In some embodiments of this utility model, the sound-absorbing material 110 is a porous plate.

[0081] In some embodiments of this utility model, the sound-absorbing material 110 is sound-absorbing cotton.

[0082] This utility model embodiment also provides a fan, such as Figure 1 , Figure 4 and Figure 5 As shown, the fan is a centrifugal fan or a cross-flow fan, including the volute tongue in any of the above embodiments.

[0083] In this embodiment, the fan can be either a centrifugal fan or a cross-flow fan. The impeller 2 of the centrifugal fan or the cross-flow fan is located on the side of the volute far from the fan outlet 7.

[0084] When the fan is working, the airflow flows through the air duct 3 towards the fan outlet 7. When the airflow passes through the volute tongue, it is prone to separation on both sides of the volute tongue, and may even form vortices, which leads to airflow pressure fluctuations and generates noise when the fan is working. Since a large amount of noise is generated at the volute tongue and emitted outside the fan, in this embodiment, most of the noise will enter the noise reduction cavity 100 through the noise reduction hole 200, and then be reflected within the noise reduction cavity 100 to weaken the noise, thereby reducing the noise when the fan is working and improving the user experience.

[0085] Moreover, the bent and extended noise reduction hole 200 structure can not only increase the number of times noise is reflected in the noise reduction hole 200 and improve the noise reduction effect, but also enhance the structural strength of the shell 1. At the same time, the bent design of the noise reduction hole 200 also prevents external debris from directly entering the noise reduction cavity 100, ensuring the stability of the noise reduction effect of the volute tongue.

[0086] In some embodiments of the fan of this utility model, such as Figure 1 and Figure 5 As shown, the fan also includes a volute 4 and an impeller 2. The shell 1 of the volute tongue is fixedly connected to one end of the volute 4 near the air outlet 7 of the fan, and the impeller 2 is rotatably connected to the volute 4.

[0087] In some embodiments of the fan of this utility model, such as Figure 5 As shown, the fan also includes a first cover plate 5 and a second cover plate 6. In the direction of extension of the rotation axis of the impeller 2, the first cover plate 5 and the second cover plate 6 are respectively installed on both sides of the volute 4.

[0088] This utility model embodiment also provides an air conditioner indoor unit, including the fan in any of the above embodiments.

[0089] When the fan of the indoor unit of the air conditioner is working, the airflow flows through the air duct 3 towards the fan outlet 7. When the airflow passes through the volute, it is easy for the airflow to separate on both sides of the volute, and even form vortices, which leads to airflow pressure fluctuations and generates noise when the fan is working. Since most of the noise is generated at the volute and emitted outside the fan, in this embodiment, most of the noise enters the noise reduction cavity 100 through the noise reduction hole 200 and is then reflected within the noise reduction cavity 100 to weaken the noise, thereby reducing the noise when the fan is working and improving the user experience.

[0090] Moreover, the bent and extended noise reduction hole 200 structure can not only increase the number of times noise is reflected in the noise reduction hole 200 and improve the noise reduction effect, but also enhance the structural strength of the shell 1. At the same time, the bent design of the noise reduction hole 200 also prevents external debris from directly entering the noise reduction cavity 100, ensuring the stability of the noise reduction effect of the volute tongue.

[0091] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A volute tongue, characterized by, The volute tongue comprises: a shell, a noise reduction cavity being defined in the shell, and a plurality of noise reduction holes being provided on the shell and communicating with the noise reduction cavity; the volute tongue is configured to cooperate with a wind wheel, and each of the noise reduction holes is provided on a surface of the shell facing the wind wheel; each of the noise reduction holes extends from an outer side of the shell to the noise reduction cavity.

2. The volute tongue according to claim 1, wherein each of the noise reduction holes is a strip-shaped hole extending along an axial direction of the wind wheel.

3. The volute tongue according to claim 2, wherein two opposite sides of each of the noise reduction holes are provided in parallel, and each of the sides comprises: a first arc-shaped area, an outer end of the first arc-shaped area being connected to an outer surface of the shell; a second arc-shaped area, an inner end of the second arc-shaped area being connected to a cavity wall of the noise reduction cavity; an inner end of the first arc-shaped area is connected to an outer end of the second arc-shaped area, and a direction of arching of the first arc-shaped area is opposite to a direction of arching of the second arc-shaped area.

4. The volute tongue according to claim 3, wherein the volute tongue is configured to form an air duct, one end of the surface of the shell facing the wind wheel close to an air outlet of the air duct is a front end of the surface of the shell facing the wind wheel, and the other end of the surface of the shell facing the wind wheel is a rear end of the surface of the shell facing the wind wheel; an outer end of each of the noise reduction holes is open towards the rear end of the surface of the shell facing the wind wheel.

5. The volute tongue according to claim 4, wherein a width of each of the noise reduction holes is 1 / 3 to 2 / 3 of a spacing between adjacent two of the noise reduction holes.

6. The volute tongue according to claim 4, wherein a radius of the first arc-shaped area is equal to a radius of the second arc-shaped area; the width of each of the noise reduction holes is 7 / 12 to 3 / 4 of the radius of the first arc-shaped area; a central angle of the first arc-shaped area is 60° to 70°, and a central angle of the second arc-shaped area is 60° to 70°.

7. The volute tongue according to claim 4, wherein the radius of the first arc-shaped area is equal to the radius of the second arc-shaped area; a front end of the surface of the shell facing the wind wheel is connected with an arc-shaped surface; the radius of the first arc-shaped area is 1 / 8 to 1 / 5 of a radius of the arc-shaped surface.

8. The volute tongue according to claim 1, wherein sound-absorbing material is provided in the noise reduction cavity.

9. A fan, characterized by The fan is a centrifugal fan or a cross-flow fan, and comprises the volute tongue according to any one of claims 1 to 8.

10. An air conditioner indoor unit characterized by comprising: The fan according to claim 9 is provided.

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