Air duct structure and air conditioner indoor unit having the same

Abstract

The present invention provides an air duct structure and an air conditioner indoor unit having the same. The air duct structure includes an air outlet component having an interconnected fan chamber and a first air duct chamber, the first air duct chamber being located above the fan chamber. The first air duct chamber has a flow cross-sectional area S1 and a flow channel length h1. The relationship between the flow cross-sectional area and the flow channel length of the first air duct chamber is: wherein A1 is a first correlation coefficient related to the first air duct chamber, and B1 is a second correlation coefficient related to the first air duct chamber. The technical solution provided by the present invention can solve the technical problem of large air flow losses within the air duct structure in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air duct structure and an air conditioner indoor unit having the same. Background Art

[0002] With the advancement of air conditioning technology, the industry is placing greater emphasis on improving comfort. Distributed air supply air conditioners (DAFs) are gaining widespread recognition in the market for their unique air distribution and fan system performance. For indoor air conditioners, the duct profile, vertical space constraints, and the relative positioning of the duct and various components significantly impact the internal flow field and overall air conditioner performance.

[0003] However, in the prior art, there is often a problem of large air flow loss in the air duct structure due to the lack of adaptive adjustment of the internal dimension setting of the air duct structure. Summary of the Invention

[0004] The main purpose of the present invention is to provide an air duct structure and an air conditioner indoor unit having the same, so as to solve the technical problem of large air flow loss in the air duct structure in the prior art.

[0005] In order to achieve the above object, according to one aspect of the present invention, there is provided an air duct structure, comprising:

[0006] An air outlet component comprises a fan cavity and a first air duct cavity connected to each other, wherein the first air duct cavity is located above the fan cavity;

[0007] The flow cross-sectional area of ​​the first air duct cavity is S1, the flow channel length of the first air duct cavity is h1, and the relationship between the flow cross-sectional area of ​​the first air duct cavity and the flow channel length of the first air duct cavity is:

[0008] Wherein, A1 is a first correlation coefficient related to the first air duct cavity, and B1 is a second correlation coefficient related to the first air duct cavity.

[0009] Further, 31813≤A1≤31833; and / or,

[0010] 6596≤B1≤6616.

[0011] Furthermore, the air outlet component and the evaporator are spaced apart, and the gap between the air outlet component and the evaporator is y, y = A3 + B3 / (1 + (x / C3) p );

[0012] Wherein, A3 is the fifth correlation coefficient related to the air outlet component, B3 is the sixth correlation coefficient related to the air outlet component, x is the length of the evaporator, C3 is the seventh correlation coefficient related to the evaporator, and p is the exponential coefficient.

[0013] Further, 142≤A3≤158; and / or,

[0014] 125≤B3≤135; and / or,

[0015] 236≤C3≤244; and / or,

[0016] 2.7≤p≤2.9.

[0017] Furthermore, the cross section of the first air duct cavity is a square cross section, the length of the first air duct cavity is e, the width of the first air duct cavity is f, and the cut-angle width of the first air duct cavity is g; wherein,

[0018] S1=ef-g 2 .

[0019] Further, and / or,

[0020] 20mm≤g≤30mm.

[0021] Furthermore, the air outlet component has a second air duct cavity, the second air duct cavity is connected to the fan cavity, and the second air duct cavity is located below the fan cavity;

[0022] The flow cross-sectional area of ​​the second air duct cavity is S2, the flow channel length of the second air duct cavity is h2, and the relationship between the flow cross-sectional area of ​​the second air duct cavity and the flow channel length of the second air duct cavity is: S2 = A2 - B2e (h2 / t);

[0023] Among them, A2 is the third correlation coefficient related to the second air duct cavity, B2 is the fourth correlation coefficient related to the second air duct cavity, e is a natural constant, and t is the eighth correlation coefficient related to the second air duct cavity.

[0024] Further, 26569≤A2≤26581; and / or,

[0025] 6121≤B2≤6141; and / or,

[0026] t=-47.5.

[0027] Furthermore, the cross section of the second air duct cavity is a square cross section, the length of the second air duct cavity is l, the width of the first air duct cavity is m, and the cut-angle width of the first air duct cavity is n; wherein,

[0028] S1=lm-n 2 .

[0029] Further, and / or,

[0030] 5mm≤n≤10mm.

[0031] According to another aspect of the present invention, there is provided an air conditioner indoor unit, comprising:

[0032] Indoor unit housing;

[0033] The air duct structure provided above is installed in the indoor unit casing.

[0034] By applying the technical solution of the present invention, by ensuring that the flow cross-sectional area of ​​the first air duct cavity and the flow duct length of the first air duct cavity have the above-mentioned relationship, it is possible to optimize the layout of the air duct structure, make the airflow in the first air duct cavity flow more uniformly and smoothly, reduce flow losses, and increase air output volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 A schematic structural diagram of an air duct structure provided in an embodiment of the present invention is shown;

[0037] Figure 2 A schematic diagram showing the dimensions of an air duct structure provided according to an embodiment of the present invention is shown;

[0038] Figure 3 shows a cross-sectional schematic diagram of a first air duct cavity provided according to an embodiment of the present invention;

[0039] Figure 4 shows a cross-sectional schematic diagram of a second air duct cavity provided according to an embodiment of the present invention;

[0040] Figure 5 A schematic diagram showing the relationship between the cross-section of the first air duct cavity and the flow duct length according to an embodiment of the present invention is shown;

[0041] Figure 6 A schematic diagram showing the relationship between the cross-section of the second air duct cavity and the flow duct length according to an embodiment of the present invention is shown;

[0042] Figure 7 The air flow velocity vector diagram in the air duct structure before improvement is shown;

[0043] Figure 8 shows a vector diagram of air flow velocity in an improved air duct structure provided by an embodiment of the present invention;

[0044] Figure 9 The velocity contour of the evaporator in the air duct structure before improvement is shown;

[0045] Figure 10 A velocity cloud diagram of an evaporator corresponding to an improved air duct structure provided according to an embodiment of the present invention is shown.

[0046] The above drawings include the following reference numerals:

[0047] 10. Air outlet component; 11. Fan cavity; 12. First air duct cavity; 13. Second air duct cavity; 14. First air outlet; 15. Second air outlet;

[0048] 20. Evaporator;

[0049] 31. First air inlet cavity; 32. Second air inlet cavity;

[0050] 40. Fan;

[0051] 50. Air guide structure. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] like Figures 1 to 4 As shown, the first embodiment of the present invention provides an air duct structure, which includes an air outlet component 10, the air outlet component 10 having a fan cavity 11 and a first air duct cavity 12 connected to each other, and the first air duct cavity 12 is located above the fan cavity 11. The flow cross-sectional area of ​​the first air duct cavity 12 is S1, and the flow channel length of the first air duct cavity 12 is h1. The relationship between the flow cross-sectional area of ​​the first air duct cavity 12 and the flow channel length of the first air duct cavity 12 is: S1 = A1 - B1 0.98 h1 Wherein, A1 is a first correlation coefficient related to the first air duct cavity 12 , and B1 is a second correlation coefficient related to the first air duct cavity 12 .

[0054] By adopting the air duct structure provided in this embodiment, by making the flow cross-sectional area of ​​the first air duct cavity 12 and the flow duct length of the first air duct cavity 12 have the above-mentioned relationship, it is convenient to optimize the layout of the air duct structure, and to make the air flow in the first air duct cavity 12 more uniform and smooth, reduce flow losses, and increase the air output volume.

[0055] In this embodiment, the air outlet component 10 and the evaporator 20 are spaced apart, and the gap between the air outlet component 10 and the evaporator 20 is y, y = A3-B3 / (1+(x / C3) p). Where A3 is the fifth correlation coefficient associated with the air outlet component 10, B3 is the sixth correlation coefficient associated with the air outlet component 10, x is the length of the evaporator 20, C3 is the seventh correlation coefficient associated with the evaporator 20, and p is the exponential coefficient. By establishing the above relationship between the air outlet component 10 and the evaporator 20, it is possible to optimize the location of the air duct structure, improve the velocity distribution uniformity of the evaporator 20, and thus enhance the performance of the entire fan system. By optimizing the relative position of the air duct and the evaporator 20, the velocity distribution uniformity of the evaporator 20 and the flow field at the fan inlet are improved, thereby enhancing the overall performance of the fan system.

[0056] Specifically, 142≤A3≤158; 125≤B3≤135; 236≤C3≤244; 2.7≤p≤2.9. This configuration facilitates calculations, making the relationship between the air outlet component 10 and the evaporator 20 more accurate and facilitating the design of air duct cavity parameters.

[0057] Specifically, 31813≤A1≤31833, 6596≤B1≤6616. This configuration facilitates calculation, making the relationship between the flow cross-sectional area of ​​the first air duct cavity 12 and the flow duct length of the first air duct cavity 12 more accurate, and facilitating the design of air duct cavity parameters.

[0058] In this embodiment, the cross section of the first air duct cavity 12 is a square cross section, the length of the first air duct cavity 12 is e, the width of the first air duct cavity 12 is f, and the cut-angle width of the first air duct cavity 12 is g; wherein S1 = ef-g 2 The use of such a cross section has a simple structure, is easy to manufacture, and is also convenient for accurately calculating the cross-sectional area of ​​the first air duct cavity 12 .

[0059] Specifically, 20mm≤g≤30mm. With such a setting, it is possible to further limit the size setting of the first air duct cavity 12, thereby facilitating better optimization of the cross-sectional parameters of the first air duct cavity 12.

[0060] In this embodiment, the air outlet component 10 has a second air duct cavity 13, which is connected to the fan cavity 11 and is located below the fan cavity 11. The flow cross-sectional area of ​​the second air duct cavity 13 is S2, and the flow duct length of the second air duct cavity 13 is h2. The relationship between the flow cross-sectional area of ​​the second air duct cavity 13 and the flow duct length of the second air duct cavity 13 is: S2 = A2-B2e(h2 / t). Among them, A2 is the third correlation coefficient related to the second air duct cavity 13, B2 is the fourth correlation coefficient related to the second air duct cavity 13, e is a natural constant, and t is the eighth correlation coefficient related to the second air duct cavity 13. By establishing the above relationship between the flow cross-sectional area of ​​the second air duct cavity 13 and the flow duct length of the second air duct cavity 13, it is possible to optimize the layout of the air duct structure, make the air flow in the second air duct cavity 13 more uniform and smooth, reduce flow losses, and increase the air volume.

[0061] Specifically, 26569≤A2≤26581; 6121≤B2≤6141; t=-47.5. This configuration facilitates calculation, making the relationship between the flow cross-sectional area of ​​the second air duct cavity 13 and the flow duct length of the second air duct cavity 13 more accurate, and facilitating the design of air duct cavity parameters.

[0062] In this embodiment, the cross section of the second air duct cavity 13 is a square cross section, the length of the second air duct cavity 13 is l, the width of the first air duct cavity 12 is m, and the cut-off width of the first air duct cavity 12 is n; wherein S1=lm-n 2 The use of such a cross section has a simple structure and is easy to manufacture, and also facilitates accurate calculation of the cross-sectional area of ​​the second air duct cavity 13 .

[0063] Specifically, 5mm≤n≤10mm. With such a setting, it is possible to further limit the size setting of the second air duct cavity 13, thereby facilitating better optimization of the cross-sectional parameters of the second air duct cavity 13.

[0064] Specifically, this embodiment proposes a parameter design method for upper and lower air outlet ducts that can improve the uniformity of airflow, and parametrically designs the profile lines, duct cross-sectional area and flow duct length of the upper and lower air outlet ducts, so that the airflow in the air outlet ducts is more uniform and smooth, reducing flow losses and increasing the air outlet volume.

[0065] Specifically, the air outlet component 10 in this embodiment is provided with a first air outlet 14 and a second air outlet 15. The first air outlet 14 is in communication with the first air duct cavity 12, and the second air outlet 15 is in communication with the second air duct cavity 13. A fan 40 is provided in the fan cavity 11, and an air guide structure 50 may be provided in the first air duct cavity 12 and / or the second air duct cavity 13. Specifically, the air guide structure 50 may be an air guide plate assembly.

[0066] In this embodiment, as far as the aerodynamic performance of the fan duct is concerned, since the airflow is restricted by the duct profile and the vertical space, this embodiment performs parameter design on the duct cross-sectional area and the outlet duct that affect the air volume based on the duct flow rate Q=SV (S—duct cross-sectional area, V—flow velocity). Under the restriction of the overall height and width of the cabinet air conditioner, this article restricts the inlet width a of the upper duct (corresponding to the first duct cavity 12), the length b of the upper duct, the inlet width c of the lower duct (corresponding to the second duct cavity 13), and the length d of the lower duct, 120mm≤a≤140mm, 520mm≤b≤560mm, 100mm≤c≤120mm, 720mm≤d≤760mm. The relationship between the upper duct cross-sectional area S1 and the flow duct length h1 satisfies: Where S1=ef-g 2 , 1.1≤e:f≤1.4, A1=31823±10, B1=6606±10, 20≤g≤30, see Figure 3 Because the downwind duct designed in this embodiment is affected by other components (such as fresh air components and electric heating components, etc.), the downwind duct is divided into AB section and BC section. The relationship between the cross-sectional area of ​​the downwind duct and the flow channel length satisfies: S2 = A2-B2e(h2 / t), where S2 = 1m-n 2 , 1.2≤l:m≤1.8, A2=26575±6, B2=6131±10, t=-47.5, 5mm≤n≤10mm, see Figure 4 If it is not affected by other components, the length of the downwind duct can be modified according to the situation, and the BC section of the duct can be adjusted or removed.

[0067] Regarding the uniformity of the wind speed distribution on the air inlet side, since the gap between the air duct and the evaporator 20 has an important influence on the air flow field at the fan inlet and the velocity distribution of the evaporator 20, it is also necessary to perform parameter design on the gap between the air duct and the evaporator 20. In this embodiment, the gap between the upper air duct and the evaporator 20 is parameterized with the impeller center as the boundary (see Figure 2 (As shown on the y-axis), on the basis of ensuring that the minimum gap between the evaporator 20 and the air duct is greater than or equal to 12mm, the air duct profile close to the evaporator 20 is designed to meet the following requirements: y = A3 + B3 / (1 + (x / C3) p), where y is the gap between the evaporator 20 and the air duct at different positions, x is the length variable of the evaporator 20, A3 = 150 ± 8, B3 = 130 ± 5, C3 = 240 ± 4, and p = 2.8 ± 0.1.

[0068] By designing the parameters of the air duct profile and vertical space, such as Figure 5 and 6 As shown in the figure, the test results show that the parameter design can effectively improve the uniformity and smoothness of the air flow in the upper and lower air-conditioning ducts, reduce the flow loss inside the duct, and improve the aerodynamic performance of the fan system; and on this basis, the gap between the duct and the evaporator 20 is reasonably designed, as shown in the figure. Figures 7 to 10 As shown, parameter design can improve the velocity distribution uniformity of the evaporator 20 and enhance the overall performance of the air conditioner.

[0069] A second embodiment of the present invention provides an air conditioner indoor unit, comprising an indoor unit housing and the aforementioned air duct structure, the air duct structure being mounted within the indoor unit housing. The indoor unit housing has a first air inlet cavity 31 and a second air inlet cavity 32. The first air inlet cavity 31 is located between the indoor unit housing and the evaporator 20, and the second air inlet cavity 32 is located between the evaporator 20 and the air outlet component 10.

[0070] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the present invention effectively improves the airflow within the ducts of vertical air conditioners with upper and lower air outlets by proposing a method for designing parameters for upper and lower air outlet ducts that can improve airflow uniformity. Parametric design of the upper and lower air outlet duct profiles, duct cross-sectional area, and duct length is performed to ensure smooth airflow within the ducts and reduce flow losses within the ducts. Furthermore, in the above-mentioned embodiments of the invention, by optimizing the relative position of the ducts and evaporator, the uniformity of the evaporator velocity distribution can be improved, thereby enhancing the overall performance of the fan.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0073] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0074] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0075] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0076] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An air duct structure, characterized in that: include: An air outlet component (10), the air outlet component (10) comprising a fan cavity (11) and a first air duct cavity (12) connected to each other, the first air duct cavity (12) being located above the fan cavity (11); The flow cross-sectional area of ​​the first air duct cavity (12) is S1, the flow channel length of the first air duct cavity (12) is h1, and the relationship between the flow cross-sectional area of ​​the first air duct cavity (12) and the flow channel length of the first air duct cavity (12) is: S1=A1-B10.98h1; Wherein, A1 is a first correlation coefficient related to the first air duct cavity (12), and B1 is a second correlation coefficient related to the first air duct cavity (12).

2. The air duct structure according to claim 1, characterized in that: The air outlet component (10) and the evaporator (20) are spaced apart, and the gap between the air outlet component (10) and the evaporator (20) is y, where y=A3+B3 / (1+(x / C3) p ); Wherein, A3 is the fifth correlation coefficient related to the air outlet component (10), B3 is the sixth correlation coefficient related to the air outlet component (10), x is the length variable of the evaporator (20), C3 is the seventh correlation coefficient related to the evaporator (20), and p is the exponential coefficient.

3. The air duct structure according to claim 2, characterized in that: 142≤A3≤158; and / or, 125≤B3≤135; and / or, 236≤C3≤244; and / or, 2.7≤p≤2.9。 4. The air duct structure according to claim 1, characterized in that: 31813≤A1≤31833; and / or, 6596≤B1≤6616。 5. The air duct structure according to claim 1, characterized in that: The cross section of the first air duct cavity (12) is a square cross section, the length of the first air duct cavity (12) is e, the width of the first air duct cavity (12) is f, and the cut-angle width of the first air duct cavity (12) is g; wherein, S1=ef-g 2 。 6. The air duct structure according to claim 5, characterized in that: and / or, 20mm≤g≤30mm.

7. The air duct structure according to claim 1, characterized in that: The air outlet component (10) has a second air duct cavity (13), the second air duct cavity (13) is communicated with the fan cavity (11), and the second air duct cavity (13) is located below the fan cavity (11); The flow cross-sectional area of ​​the second air duct cavity (13) is S2, the flow channel length of the second air duct cavity (13) is h2, and the relationship between the flow cross-sectional area of ​​the second air duct cavity (13) and the flow channel length of the second air duct cavity (13) is: S2=A2-B2e(h2 / t); Wherein, A2 is the third correlation coefficient related to the second air duct cavity (13), B2 is the fourth correlation coefficient related to the second air duct cavity (13), e is a natural constant, and t is the eighth correlation coefficient related to the second air duct cavity (13).

8. The air duct structure according to claim 7, characterized in that: 26569≤A2≤26581; and / or, 6121≤B2≤6141; and / or, t＝-47.5。 9. The air duct structure according to claim 7, characterized in that: The cross section of the second air duct cavity (13) is a square cross section, the length of the second air duct cavity (13) is l, the width of the first air duct cavity (12) is m, and the cut-angle width of the first air duct cavity (12) is n; wherein, S1=lm-n 2 。 10. The air duct structure according to claim 9, characterized in that: and / or, 5mm≤n≤10mm.

11. An air conditioner indoor unit, characterized in that: include: Indoor unit housing; The air duct structure according to any one of claims 1 to 10, wherein the air duct structure is installed in the indoor unit casing.

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