An air duct assembly, a fan, and an air conditioner including the same

Abstract

The present invention provides an air duct assembly, a fan, and an air conditioner including the same. The air duct assembly includes a housing, an air duct for air flow is formed inside the housing, a corner is formed inside the air duct, a flow disturbance structure is provided on the inner wall of the air duct at the corner, the flow disturbance structure includes at least two protrusions, and the flow disturbance structure causes a velocity difference in the air flow flowing through different positions of the flow disturbance structure in the width direction of the air duct when the air flow passes through the corner. The present invention can, by providing an irregular flow disturbance structure, make the velocity field of the air flow inconsistent after passing through the flow disturbance structure, resulting in the air flow being disordered at this position and unable to form an effective cyclone phenomenon, thereby reducing noise.

Description

Technical Field

[0001] The present invention relates to the technical field of air ducts, and particularly to an air duct assembly, a fan, and an air conditioner including the same. Background Art

[0002] Problems such as rotational noise and cavitation abnormal noise in equipment such as air-conditioning console units are key issues for household console units. These noises and abnormal noises often occur inside the air-conditioning duct, mainly because of unreasonable duct profiles and volute structures, which lead to phenomena such as internal cavity air vortices, chaotic airflows, and uneven air velocity fields.

[0003] Duct noise is a major problem that troubles technicians. For example, in the field of air conditioners, the volute profile of the duct is a key task in air-conditioning design. Improving duct noise through the design of the volute profile is the main current research direction.

[0004] Negative pressure will be generated at the part of the volute outlet close to the volute tongue, causing large turbulence at this place and resulting in noise. Therefore, some air ducts have improved the volute tongue structure in order to improve the noise problem. For example, a uniformly distributed serrated structure is set at the volute tongue, but this structure cannot solve the noise problem well, and an air cavity will be formed behind the corner. The air flow forms a vortex at the cavity, and finally abnormal noises such as rotational noise and cavitation noise are generated. Summary of the Invention

[0005] In view of this, the present invention provides an air duct assembly, a fan, and an air conditioner including the same, so as to solve the technical problem of relatively large noise inside the air duct existing in the prior art. Specifically:

[0006] In a first aspect, the present invention provides an air duct assembly, including a housing, and an air duct for air flow to pass through is formed inside the housing.

[0007] An inner corner is formed inside the air duct.

[0008] A flow disturbance structure is provided on the inner wall of the air duct at the corner, and the flow disturbance structure includes at least two protrusions.

[0009] The flow disturbance structure causes a velocity difference in the air flow passing through different positions of the flow disturbance structure in the width direction of the air duct when the air flow passes through the corner.

[0010] Further optionally, a spacing is formed between two adjacent protrusions.

[0011] Further optionally, the outer wall surface of the protrusion gradually decreases in height along the air flow direction to form an arc surface.

[0012] Further optionally, a concave flow channel is formed between two protrusions, and the concave flow channel is arranged along the air flow direction.

[0013] Further optionally, the shapes of any two of the concave channels are different from each other.

[0014] Further optionally, a plurality of the concave channels are provided, and the concave channels and the protrusions are arranged at intervals.

[0015] Further optionally, the protrusions and the concave channels extend along the air flow direction.

[0016] Further optionally, the flow disturbing structure forms an irregular shape.

[0017] Further optionally, the heights, lengths, and slopes of any two of the protrusions are different from each other; and / or,

[0018] the depths, lengths, and slopes of any two of the concave channels are different from each other.

[0019] Further optionally, the housing includes a volute and a volute tongue, the volute tongue forms the corner, and the flow disturbing structure is provided on the volute tongue.

[0020] In a second aspect, the present invention provides a blower, including the above-mentioned air duct assembly, an air impeller cavity is formed in the air duct assembly, and an air impeller is arranged in the air impeller cavity.

[0021] Further optionally, the blower is a centrifugal blower.

[0022] In a third aspect, the present invention provides an air conditioner, including the above-mentioned air duct assembly or blower.

[0023] By arranging a flow disturbing structure at the corner of the air duct and making the flow disturbing structure form an irregular shape, the flow velocities of the air flows passing through different positions of the flow disturbing structure are different, a flow velocity difference is formed, the velocity field of the air flow is inconsistent after passing through the flow disturbing structure, resulting in the air flow being disordered at this place and unable to form an effective cyclone phenomenon, thereby the noise can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By referring to the accompanying drawings and describing its exemplary embodiments in detail, the above and other objects, features, and advantages of the present disclosure will become more apparent. The following described drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 A schematic structural diagram showing the air duct assembly of the present invention;

[0026] Figure 2 Showing Figure 1 The enlarged view at A in

[0027] Figure 3A schematic diagram showing the air flow state at the spoiler structure according to an embodiment of the present invention.

[0028] In the figure:

[0029] 10. Volute; 20. Volute tongue; 30. Spoiler structure; 31. Protrusion; 32. Concave flow channel. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0032] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0033] It should also be noted that the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes elements inherent to such commodity or system. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the said element.

[0034] The present invention reduces noise by arranging a spoiler structure at the corner of the air duct, and making the flow velocities of the air flows passing through different parts of the spoiler structure different due to the irregular shape of the spoiler structure. After passing through the spoiler structure, the velocity field of the air flow is inconsistent, resulting in the air flow being disordered here and unable to form an effective cyclone phenomenon. The following is a detailed introduction to the present invention with specific embodiments:

[0035] The present invention provides an air duct assembly, including a housing. An air duct for air flow is formed inside the housing.

[0036] An elbow is formed inside the air duct. At the elbow, the size of the air duct is reduced to decrease the air flow rate. Preferably, the angle between the two walls of the air duct forming the elbow is greater than or equal to 120°, that is, the angle of the elbow is greater than or equal to 120°.

[0037] A flow disturbing structure 30 is arranged at the elbow. The flow disturbing structure 30 is located inside the air duct. The flow disturbing structure 30 includes at least two protrusions 31. The protrusions 31 extend along the air flow direction. Moreover, the shapes of at least two protrusions 31 are different. The flow disturbing structure 30 causes a velocity difference to be generated between the air flows passing through different positions of the flow disturbing structure in the width direction of the air duct when the air flow passes through the elbow. Specifically, in this embodiment, the width direction of the air duct refers to the direction parallel to the axis of the airfoil arranged inside the air duct.

[0038] At least two protrusions 31 cause a velocity difference to be generated between the air flows at different positions after the air flow passes through the elbow.

[0039] Preferably, the housing includes a volute 10 and a volute tongue 20. The volute 10 and the volute tongue 20 jointly enclose the air duct. The volute tongue 20 forms an elbow inside the air duct. The flow disturbing structure 30 is formed on the volute tongue 20. Further, the flow disturbing structure 30 is distributed along the width direction of the volute tongue 20 (i.e., the direction perpendicular to the air flow direction).

[0040] A spacing is formed between two adjacent protrusions 31. The air flow can flow along the protrusions 31 and the spacing between the protrusions 31. The outer wall surface of the protrusion 31 gradually decreases in height along the air flow direction to form an arc surface, which is more conducive to air flow. Preferably, in the air flow direction, the height of the protrusion 31 gradually decreases, and the heights of different protrusions 31 are different, that is, the heights at the highest positions are different.

[0041] Preferably, a concave flow channel 32 is formed between two protrusions 31. The concave flow channel 32 is arranged along the air flow direction. Further, the bottom wall of the concave flow channel 32 constitutes an arc surface to facilitate air flow. The shapes of any two concave flow channels 32 are different, that is, the depths of any two concave flow channels 32 are different.

[0042] A plurality of concave channels 32 are provided, and the concave channels 32 and the protrusions 31 are arranged at intervals, that is, one concave channel 32 is arranged between two adjacent protrusions 31. Similarly, one protrusion 31 is arranged between two adjacent concave channels 32. For example, at least 2 protrusions 31 and 2 concave channels 32 need to be provided. The height of the protrusion 31 and the depth of the concave channel 32 are different, and the protrusion 31 and the concave channel 32 are staggered, that is, the heights, lengths, slopes, and widths of any two protrusions 31 are different; and / or the depths, lengths, slopes, and widths of any two concave channels 32 are different. For example, they are distributed in the following manner: the height of the protrusion 31 is 5 mm, the depth of the concave channel 32 is 4 mm, the height of the protrusion 31 is 3 mm, the depth of the concave channel 32 is 5 mm, and so on for various combinations. Here, the height of the protrusion 31 and the depth of the concave channel 32 refer to the maximum height or maximum depth. Preferably, the height difference between the protrusion 31 and the concave channel 32 is greater than or equal to 8 mm.

[0043] Preferably, in other embodiments, using the same principle, at the corner, a similar structure of "concave, convex, concave, convex" or "convex, concave, convex, concave" with inconsistent lengths and depths of the concave and convex structures can achieve the effect of reducing air flow noise, and no detailed description will be given here one by one.

[0044] In the corner of the volute 10 of the present invention, that is, on the volute tongue 20, an uneven concave and convex structure with different heights, lengths, and slopes is adopted. When the air flow passes through the corner of the volute 10 here, the air flow generates unequal speeds because the distances passed on the same horizontal plane are not equal. As Figure 3 shown, when the air flow passes through the corner, the velocity field from left to right is inconsistent. This inconsistency of the velocity field will cause the air flow to be disordered here (the dotted line represents the air flow), and an effective cyclone phenomenon cannot be formed, thereby reducing the noise generated by the air flow.

[0045] The present invention also provides a fan, including the above-mentioned air duct assembly. The fan is preferably a centrifugal fan, including a volute 10 assembly and an impeller. The volute 10 assembly includes a volute 10 and a volute tongue 20. The volute 10 and the volute tongue 20 jointly form an air duct, and the impeller is arranged in the air duct.

[0046] Specifically, a wind wheel cavity is formed in the volute 10 for accommodating the impeller. A part of the volute 10 and the volute tongue 20 form an air outlet flow channel, and the air outlet flow channel is communicated with the wind wheel cavity. Preferably, there are two air outlet flow channels, and the two air outlet flow channels are symmetrically distributed about the center, and the center of the wind wheel cavity forms the center of symmetry.

[0047] The present invention also provides an air conditioner, including the above-mentioned air duct assembly or fan. Preferably, the air conditioner includes a cabinet air conditioner, and the air duct assembly constitutes the air duct of the cabinet air conditioner.

[0048] The exemplary embodiments of the present disclosure have been specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, arrangements, or implementation methods described herein; rather, the present disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An air conditioner, characterized in that: Including a floor-standing air conditioner, the floor-standing air conditioner includes a blower, the blower is a centrifugal blower, and the blower includes an air duct assembly and an impeller; the air duct assembly includes a housing, and an air duct for air flow is formed inside the housing; the housing includes a volute and a volute tongue, and the volute and the volute tongue jointly enclose an air outlet duct and an impeller chamber; The air outlet duct and the impeller chamber are communicated to form the air duct, and the impeller is arranged in the impeller chamber; The volute tongue forms a corner at the communication of the air outlet duct and the impeller chamber, and a flow disturbance structure is arranged on the inner wall of the air outlet duct at the corner; the flow disturbance structure is of an irregular shape; The flow disturbance structure includes at least two protrusions, and the at least two protrusions are arranged at intervals in the width direction of the air outlet duct; the flow disturbance structure causes a speed difference in the air flow flowing through different positions of the flow disturbance structure in the width direction of the air outlet duct when the air flow passes through the corner; An inner concave flow channel is formed between two adjacent protrusions, and a plurality of inner concave flow channels are arranged, and the inner concave flow channels and the protrusions are arranged at intervals; the protrusions and the inner concave flow channels extend along the air flow direction, and the outer wall surface of the protrusion gradually decreases in height along the air flow direction to form an arc surface; The shapes of at least two of the protrusions are different, and the shapes of any two of the inner concave flow channels are different.

2. The air conditioner according to claim 1, characterized in that: The angle between the two wall surfaces of the air outlet duct forming the corner is greater than or equal to 120°.

3. The air conditioner according to claim 1, characterized in that: The bottom wall of the inner concave flow channel forms an arc surface.

4. The air conditioner according to claim 1, wherein: There are two air outlet ducts, and the two air outlet ducts are centrosymmetrically distributed, and the center of the impeller chamber forms the center of symmetry.

5. The air conditioner according to claim 1, characterized in that: The heights, lengths, and slopes of any two of the protrusions are different; and / or, The depths, lengths, and slopes of any two of the inner concave flow channels are different.

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