Air duct assembly and air conditioner indoor unit with same

Abstract

The utility model provides an air duct assembly and an air conditioner indoor unit with the air duct assembly, the air duct assembly comprises an air duct framework and a supporting piece, and the air duct framework comprises an air duct plate used for limiting an air duct; the supporting piece is arranged on the leeward side of the air duct plate, a closed containing cavity is formed in the supporting piece, or the closed containing cavity is defined by the supporting piece and the air duct plate; the containing cavity is filled with gas. According to the air duct assembly, the supporting piece is used for supporting the air duct plate, so that the air duct plate is not prone to deformation, and the problems that when a draught fan operates, large airflow noise is generated, and the draught fan generates grinding sound are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioners, and in particular to an air duct assembly and an indoor air conditioning unit having the same. Background Technology

[0002] With the improvement of living standards, people are paying more and more attention to the air quality of their living and working environments. Air conditioners are a commonly used air handling device. The indoor unit of an air conditioner in related technologies includes a fan and a duct frame, which is usually injection molded. To ensure the airflow of the indoor unit, the gap between the fan and the duct plate of the duct frame is usually small (typically 6mm to 7.5mm). However, the duct plate structure of the duct frame in related technologies has low strength, making it prone to deformation. This further reduces the gap between the fan and the duct plate, resulting in significant airflow noise. Furthermore, when the deformation of the duct plate is large, it can cause fan grinding noise, potentially leading to fan damage. Utility Model Content

[0003] In view of the above problems, the present invention is proposed to provide a duct assembly that overcomes or at least partially solves the above problems and an air conditioning indoor unit having the same.

[0004] The present invention aims to solve the problem of low structural strength of the duct plate in the duct frame in the related technology, so as to reduce the airflow noise generated during the operation of the fan and avoid the fan grinding noise.

[0005] Specifically, this utility model provides an air duct assembly.

[0006] The air duct assembly of this utility model includes: an air duct frame, which includes an air duct plate for defining the air duct;

[0007] A support member is disposed on the leeward side of the air duct plate, and a sealed receiving cavity is formed inside the support member, or the support member and the air duct plate define a sealed receiving cavity; the receiving cavity is filled with gas.

[0008] In some embodiments, the support member includes: a first side plate, one end of which is connected to the air duct plate and extends along the width direction of the air duct plate, the width direction being perpendicular to the airflow direction; a second side plate, one end of which is connected to the air duct plate and is spaced apart from the first side plate on the second side plate; a third side plate, which is connected between the first side plate and the second side plate, the third side plate being spaced apart from the air duct plate, and the receiving cavity being located between the third side plate and the air duct plate, and between the first side plate and the second side plate.

[0009] In some embodiments, the cross-sectional shape of the receiving cavity is one of quadrilateral, circular, and elliptical.

[0010] In some embodiments, the duct assembly further includes: at least one supporting rib is provided between the duct plate and the first side plate; and / or, at least one supporting rib is provided between the duct plate and the second side plate.

[0011] In some embodiments, the third side plate is connected to an extension plate; each of the supporting stiffeners is also connected to the corresponding extension plate.

[0012] In some embodiments, there are multiple support members, which are arranged at vertical intervals; or, the ratio between the length of the support member and the width of the duct plate is 4 / 5 or more; the support member and the duct frame are integrally injection molded.

[0013] In some embodiments, an air inlet is provided on one of the first side plate, the second side plate, and the third side plate, and a sealing structure is provided at the air inlet.

[0014] In some embodiments, the gas is nitrogen.

[0015] In some embodiments, the ratio of the area of ​​the cross-section of the receiving cavity to the area of ​​the outer contour of the cross-section of the support member is 1 / 2 to 5 / 6.

[0016] The indoor unit of the air conditioner in this embodiment includes any one of the air duct components described above.

[0017] In this embodiment of the duct assembly, a support member is provided on the leeward side of the duct plate. The support member contains a gas-filled cavity, or the support member and the duct plate together form a gas-filled cavity. This provides support for the duct plate, preventing deformation. Especially when the duct assembly in this embodiment is injection molded, the support member not only improves the bending resistance of the duct plate, preventing deformation, but also, during the injection molding process of the duct plate and support member, the pressure of the gas filled in the cavity is evenly applied to the molten material, reducing internal stress generated during cooling and contraction, and improving the overall load-bearing capacity of the duct plate and / or support member. Therefore, it further enhances the structural strength of the duct plate, making it less prone to deformation, thus reducing airflow noise during fan operation and preventing fan grinding noise.

[0018] 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

[0019] 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:

[0020] Figure 1 This is a schematic structural diagram of the air duct frame according to an embodiment of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the air duct assembly according to an embodiment of the present utility model;

[0022] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A in the middle;

[0023] Figure 4 This is a schematic structural diagram of the air duct assembly according to an embodiment of the present utility model;

[0024] Figure 5 yes Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0025] Figure 6 This is a schematic structural diagram of the indoor unit of an air conditioner according to an embodiment of this utility model.

[0026] Figure label:

[0027] Duct assembly 10; duct frame 100; duct plate 110; leeward side 120; first end plate 130; second end plate 140; support member 200; receiving cavity 210; first side plate 220; second side plate 230; third side plate 240; support rib 250; extension plate 260; air inlet 270; sealing structure 280; fan 300; air conditioner indoor unit 20. Detailed Implementation

[0028] The following reference Figures 1 to 6 This invention describes an air duct assembly and an indoor air conditioning unit having the same, 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. Thus, 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, "a plurality of" 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The air duct assembly 10 of this utility model is described below with reference to the accompanying drawings.

[0033] like Figures 1-5 As shown, the air duct assembly 10 of this utility model embodiment includes an air duct frame 100 and a support member 200.

[0034] The air duct frame 100 includes an air duct plate 110 for defining the air duct, that is, the windward side of the air duct plate 110 can guide the airflow.

[0035] The support member 200 is disposed on the leeward side 120 of the air duct plate 110, and a sealed receiving cavity 210 is formed inside the support member 200, which is filled with gas. That is, the support member 200 has a hollow internal structure, and the inner wall surface of the support member 200 forms at least a portion of the receiving cavity 210. Alternatively, the support member 200 and the air duct plate 110 define a sealed receiving cavity 210, meaning that the support member 200 and the leeward side of the air duct plate 110 together form at least a portion of the receiving cavity 210. The receiving cavity 210 is filled with gas.

[0036] Compared with related technologies, in this embodiment of the utility model, the air duct assembly 10 has a support member 200 provided on the leeward side 120 of the air duct plate 110. The support member 200 has a gas-filled cavity 210 formed inside it, or the support member 200 and the air duct plate 110 together form the gas-filled cavity 210. This improves the structural strength of the air duct plate 110 by utilizing the support member 200, thereby preventing deformation of the air duct plate 110. Especially in this embodiment, when the air duct assembly 10 is injection molded, the support member 200 can not only improve the bending resistance of the air duct plate 110 and prevent the air duct plate 110 from deforming, but also, during the injection molding process of the air duct plate 110 and the support member 200, the pressure of the gas filled in the accommodating cavity 210 can be evenly applied to the molten material, thereby reducing the internal stress generated during cooling and shrinkage, and improving the overall load-bearing capacity of the air duct plate 110 and / or the support member 200. Therefore, the structural strength of the air duct plate 110 is further enhanced, making the air duct plate 110 less prone to deformation, thereby achieving the purpose of reducing the airflow noise emitted by the fan 300 during operation and preventing the fan 300 from making grinding noise.

[0037] Furthermore, the support member 200 has a hollow structure, which reduces the amount of material used in its manufacture, thereby lowering the manufacturing cost of the air duct assembly 10 in this embodiment.

[0038] It should be noted that the support component 200 and the air duct plate 110 can be manufactured using gas-assisted forming. Gas-assisted forming enables an integrated design of the support component 200 and the air duct plate 110, reducing overall deformation caused by stress concentration or tolerance accumulation at connection points during traditional multi-component assembly.

[0039] In some embodiments, such as Figure 3As shown, the support member 200 includes a first side plate 220, a second side plate 230, and a third side plate 240. One end of the first side plate 220 is connected to the air duct plate 110, and the first side plate 220 extends along the width direction of the air duct plate 110, which is perpendicular to the airflow direction. One end of the second side plate 230 is connected to the air duct plate 110, and the second side plate 230 is spaced apart from the first side plate 220. The third side plate 240 is connected between the first side plate 220 and the second side plate 230, and is spaced apart from the air duct plate 110. The receiving cavity 210 is located between the third side plate 240 and the air duct plate 110, and is also located between the first side plate 220 and the second side plate 230.

[0040] By utilizing the synergistic effect of the first side plate 220, the second side plate 230, the third side plate 240, and the air duct plate 110, the bending stiffness of the support member 200 in this embodiment is further improved, enabling the support member 200 to provide better support for the air duct plate 110, thereby further improving the structural strength of the air duct plate 110 and making the air duct plate 110 less prone to deformation.

[0041] In some alternative embodiments, the two ends of the third side plate 240 are respectively connected to the middle of the first side plate 220 and the middle of the second side plate 230. This makes the support member 200 form an "I"-shaped structure, which improves the bending stiffness of the support member 200 in this embodiment, and makes the air duct plate 110 less prone to deformation by the support of the support member 200.

[0042] In some alternative embodiments, the two ends of the third side plate 240 are respectively connected to the ends of the first side plate 220 and the second side plate 230 that are away from the leeward side. This makes the support member 200 form a box-shaped structure, which improves the bending stiffness of the support member 200 in this embodiment, and makes the air duct plate 110 less prone to deformation by the support of the support member 200.

[0043] In some embodiments, such as Figures 1-3 As shown, the air duct assembly 10 also includes a first end plate 130 and a second end plate 140. The two ends of the first side plate 220, the second side plate 230, and the third side plate 240 are respectively connected to the first end plate 130 and the second end plate 140, and the two ends of the air duct plate 110 are respectively connected to the first end plate 130 and the second end plate 140. The first side plate 220, the second side plate 230, the third side plate 240, the first end plate 130, and the second end plate 140 together form a sealed receiving cavity 210.

[0044] In other embodiments, such as Figures 1-3 As shown, the support member 200 also includes two end walls, a first side plate 220, a second side plate 230, a third side plate 240, and the two end walls together form a closed receiving cavity 210.

[0045] In some embodiments, such as Figure 3 As shown, when the support member 200 includes a first side plate 220, a second side plate 230, and a third side plate 240, the cross-sectional shape of the receiving cavity 210 is quadrilateral. This allows the inner wall surface of the receiving cavity 210 to adapt to the structure formed by the first side plate 220, the second side plate 230, the third side plate 240, and the air duct plate 110, thereby facilitating the injection molding of the receiving cavity 210 together with the first side plate 220, the second side plate 230, the third side plate 240, and the air duct plate 110. This reduces the manufacturing difficulty and cost of the air duct assembly 10 in this embodiment.

[0046] In other embodiments, the cross-sectional shape of the receiving cavity 210 is circular. A circular cross-section has the smallest perimeter for the same cross-sectional area, resulting in better uniform material distribution on the outer side of the receiving cavity 210, thereby improving the bending stiffness of the support member 200 and / or the duct plate 110. Furthermore, the closed annular structure of the receiving cavity 210 effectively disperses stress, avoids stress concentration at corners, and extends the service life of the support member 200.

[0047] In some other embodiments, the cross-sectional shape of the receiving cavity 210 can also be elliptical. The closed annular structure of the receiving cavity 210 can effectively disperse stress, avoid stress concentration at the corners, and extend the service life of the support member 200.

[0048] In some embodiments, such as Figures 3-5 As shown, the air duct assembly 10 of this utility model embodiment also includes a support rib plate 250.

[0049] At least one supporting rib 250 is provided between the air duct plate 110 and the first side plate 220. Alternatively, at least one supporting rib 250 is provided between the air duct plate 110 and the second side plate 230. By providing the supporting rib 250 between the air duct plate 110 and the first side plate 220, the rigidity of the supporting rib 250 itself supports the overall structure of the support member 200, preventing deformation of the support member 200 under stress, thereby further improving the overall structural strength of the support member 200 and the air duct plate 110.

[0050] Specifically, there are multiple support ribs 250, which are spaced apart. Each support rib 250 is roughly triangular in shape.

[0051] Furthermore, multiple supporting ribs 250 are provided between the air duct plate 110 and the second side plate 230, as well as between the air duct plate 110 and the first side plate 220. This makes the force on the support member 200 more even, thereby further improving the overall structural strength of the support member 200 and the air duct plate 110.

[0052] In some embodiments, such as Figures 3-5 As shown, the third side plate 240 is connected to an extension plate 260, and each supporting rib 250 is also connected to a corresponding extension plate 260. Specifically, when the extension plate 260 is located on the side of the first side plate 220 away from the second side plate 230, the extension plate 260 extends in a direction away from the first side plate 220 and away from the second side plate 230, and the extension plate 260 is connected to the side of the third side plate 240 away from the leeward side. When the extension plate 260 is located on the side of the second side plate 230 away from the first side plate 220, the extension plate 260 extends in a direction away from the second side plate 230 and away from the first side plate 220, and the extension plate 260 is connected to the side of the third side plate 240 away from the leeward side. By connecting the extension plate 260 to the third side plate 240, the support rib 250 can better support the support member 200 through the extension plate 260, thus further improving the overall structural strength of the support member 200 and the air duct plate 110.

[0053] Furthermore, the ratio between the length of the support member 200 and the width of the air duct plate 110 is more than 4 / 5. That is, the length of the support member 200 is approximately the same as the width of the air duct plate 110, so that the support member 200 provides uniform support for the air duct plate 110 in the width direction.

[0054] The ratio between the length of the support member 200 and the width of the air duct plate 110 includes, but is not limited to, 21 / 25, 22 / 25, 23 / 25, 24 / 25 or 1.

[0055] In other embodiments, the support member 200 includes a plurality of spaced-apart first segments, and the extension includes a plurality of spaced-apart second segments. Each of the first segments corresponds one-to-one with a plurality of second segments, with the second segment positioned on one side of the corresponding first segment adjacent to the air outlet end of the duct frame 100. There are multiple support ribs 250, which are vertically spaced apart.

[0056] In some embodiments, the support member 200 and the duct frame 100 are integrally injection molded, thereby avoiding or reducing overall deformation caused by stress concentration or tolerance accumulation at connection points during traditional multi-part assembly, and preventing the duct plate 110 from being too close to the fan 300 due to excessive assembly errors.

[0057] In some embodiments, such as Figure 5As shown, an air inlet 270 is provided on one of the first side plate 220, the second side plate 230, and the third side plate 240. That is, the air inlet 270 is provided on the first side plate 220; or, the air inlet 270 is provided on the second side plate 230; or, the air inlet 270 is provided on the third side plate 240. A sealing structure 280 is provided at the air inlet 270. By providing the air inlet 270 on one of the first side plate 220, the second side plate 230, and the third side plate 240, air can be injected into the support member 200 through the air inlet 270, forming a hollow air-assisted structure in the support member 200. The sealing structure 280 is used to seal the air inlet 270 to prevent gas leakage from the receiving cavity 210.

[0058] The gas injected into the receiving cavity 210 can be nitrogen. On one hand, nitrogen, as an inert gas, does not chemically react with the molten plastic during high-temperature injection molding, preventing material oxidation or degradation and ensuring the integrity of the internal structure of the support component 200. On the other hand, under high pressure, because nitrogen is non-flammable, it greatly improves the safety of manufacturing the air duct assembly 10 in this embodiment.

[0059] Optionally, the ratio of the cross-sectional area of ​​the receiving cavity 210 to the area of ​​the outer contour of the cross-section of the support member 200 is 1 / 2 to 5 / 6. This not only ensures that the support member 200 has high structural strength, but also saves on the manufacturing materials of the air duct assembly 10 and reduces manufacturing costs.

[0060] like Figure 6 As shown, the indoor unit 20 of the air conditioner according to this embodiment of the present invention includes a fan 300 and an air duct assembly 10. The air duct assembly 10 is the air duct assembly 10 of any of the above embodiments, wherein the air duct plate 110 of the air duct assembly 10 is a rear volute, and a support member 200 is disposed at the air inlet end of the air duct plate 110. The fan 300 is configured to cause airflow through the air duct plate 110, and the distance between the air inlet end of the air duct plate 110 and the fan 300 is 6mm to 7.5mm. Optionally, the distance between the air inlet end of the air duct plate 110 and the fan 300 is 6mm, 6.5mm, 6.9mm, 7mm, 7.1mm, or 7.5mm.

[0061] In this embodiment of the invention, the indoor unit 20 of the air conditioner can be a floor-standing air conditioner or a wall-mounted air conditioner.

[0062] In this embodiment of the utility model, the air duct assembly 10 has a support member 200 on the leeward side 120 of the air duct plate 110. The support member 200 has a gas-filled cavity 210 inside, or the support member 200 and the air duct plate 110 together form the gas-filled cavity 210. This improves the structural strength of the air duct plate 110 by utilizing the support member 200, thereby preventing deformation of the air duct plate 110. Especially in this embodiment, when the air duct assembly 10 is injection molded, the support member 200 can not only improve the bending resistance of the air duct plate 110 and prevent the air duct plate 110 from deforming, but also, during the injection molding process of the air duct plate 110 and the support member 200, the pressure of the gas filled in the accommodating cavity 210 can be evenly applied to the molten material, thereby reducing the internal stress generated during cooling and shrinkage, and improving the overall load-bearing capacity of the air duct plate 110 and / or the support member 200. Therefore, the structural strength of the air duct plate 110 is further enhanced, making the air duct plate 110 less prone to deformation, thereby achieving the purpose of reducing the airflow noise emitted by the fan 300 during operation and preventing the fan 300 from making grinding noise.

[0063] 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 duct assembly, characterized in that, include: A duct frame, which includes a duct plate for defining the duct; A support member is disposed on the leeward side of the air duct plate, and a sealed receiving cavity is formed inside the support member, or the support member and the air duct plate define a sealed receiving cavity; the receiving cavity is filled with gas.

2. The air duct assembly according to claim 1, characterized in that, The support member includes: The first side plate has one end connected to the air duct plate and extends along the width direction of the air duct plate, which is perpendicular to the airflow direction. The second side plate has one end connected to the air duct plate and is spaced apart from the first side plate in the second side plate; The third side plate is connected between the first side plate and the second side plate. The third side plate is spaced apart from the air duct plate. The receiving cavity is located between the third side plate and the air duct plate, and between the first side plate and the second side plate.

3. The air duct assembly according to claim 2, characterized in that, The cross-sectional shape of the receiving cavity is one of quadrilateral, circular, and elliptical.

4. The air duct assembly according to claim 2, characterized in that, Also includes: At least one supporting rib is provided between the air duct plate and the first side plate; And / or, At least one supporting rib is provided between the air duct plate and the second side plate.

5. The air duct assembly according to claim 4, characterized in that, The third side plate is connected to an extension plate; each of the supporting stiffeners is also connected to the corresponding extension plate.

6. The air duct assembly according to claim 5, characterized in that, There are multiple support members, and the multiple support members are arranged at vertical intervals; or, The ratio between the length of the support member and the width of the duct plate is 4 / 5 or more; The support component is integrally injection molded with the air duct frame.

7. The air duct assembly according to claim 2, characterized in that, An air inlet is provided on one of the first side plate, the second side plate, and the third side plate, and a sealing structure is provided at the air inlet.

8. The air duct assembly according to claim 1, characterized in that, The gas is nitrogen.

9. The air duct assembly according to claim 1, characterized in that, The ratio of the area of ​​the cross-section of the receiving cavity to the area of ​​the outer contour of the cross-section of the support member is 1 / 2 to 5 / 6.

10. An indoor unit for an air conditioner, characterized in that, Includes the air duct assembly described in any one of claims 1-9.

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