An air conditioner

Abstract

The embodiment of the application provides an air conditioner, and relates to the technical field of air conditioner equipment. The air conditioner comprises an air duct assembly and an air blade. The air duct assembly comprises a rear volute. The rear volute is provided with a rear diffuser section at one end close to an air outlet, and is provided with a rear volute tongue at one end close to an air inlet. The side of the rear volute close to the air blade is provided with a wind guide circular arc section. The wind guide circular arc section has opposite first and second ends. The first and second ends are connected with the rear volute tongue and the rear diffuser section, respectively. The distance between the wind guide circular arc section and the air blade gradually increases in the direction close to the rear diffuser section. The first end has a preset distance L from the air blade. The radius of the air blade is R3. The wind guide circular arc section has a minimum radius R1. R3+L<=R1<1.3R3. The wind guide circular arc section has a small radius, which can reduce the flow area inside the volute, thereby increasing the gas flow rate, so that the airflow is more concentrated into the diffuser section, and finally the air output is increased.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and more specifically, to an air conditioner. Background Technology

[0003] The volute profile of an air conditioner's indoor unit affects its airflow and noise levels. The volute profile is primarily determined by its radius, which in turn affects the flow area of ​​the fluid domain inside the unit, thus influencing the mainstream airflow velocity and ultimately leading to changes in airflow. Currently, the volute radius is not optimal, resulting in suboptimal airflow. To address this issue, the volute radius is adjusted to better match the existing cross-flow fan blades, thereby increasing the airflow. Summary of the Invention

[0004] The object of this invention includes providing an air conditioner that can increase the air volume of the air conditioner.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides an air conditioner including an air duct assembly and fan blades;

[0007] The air duct assembly includes a front volute and a rear volute. The rear volute is provided with a rear diffuser section at the end near the air outlet. The front volute and the rear volute 110 are arranged opposite to each other and together define a fan blade mounting cavity for the fan blade 200 to be installed. One side of the fan blade mounting cavity forms an air outlet, and the other side is provided with an air inlet.

[0008] A rear diffuser section is provided at the end of the rear volute near the air outlet, and a rear volute tongue is provided at the end of the rear volute near the air inlet;

[0009] The rear volute has a guide arc section on the side near the fan blade. The guide arc section has a first end and a second end. The second end is connected to and tangent to the rear diffuser section, and the first end is connected to the rear volute tongue. The radius of the arc of the guide arc section increases in the direction near the rear diffuser section. The distance between the guide arc section and the fan blade gradually increases in the direction near the rear diffuser section. The first end has a preset distance L between the fan blade and the fan blade.

[0010] Among them, the air guide arc segment has a minimum radius dimension R1, the radius dimension of the fan blade is R3, and R3+L≤R1<1.3R3.

[0011] By setting the above parameters, the gas velocity can be increased, allowing the airflow to enter the diffuser section more concentratedly, reducing airflow separation and turbulence, and ultimately increasing the output air volume.

[0012] In an optional implementation, R3 is 71 mm, L = 5 mm, and 80 ≤ R1 ≤ 90 mm.

[0013] By setting the above parameters, the gas velocity can be increased, allowing the airflow to enter the diffuser section more concentratedly, reducing airflow separation and turbulence, and ultimately increasing the output air volume.

[0014] In an optional implementation, R1 is 86.3 mm or 89.3 mm.

[0015] By setting the above parameters, the gas velocity can be increased, allowing the airflow to enter the diffuser section more concentratedly, reducing airflow separation and turbulence, and ultimately increasing the output air volume.

[0016] In an optional embodiment, the air guide arc segment includes a first arc segment and a second arc segment that are connected and tangent to each other, and the rear diffuser segment is connected to the end of the second arc segment away from the first arc segment, and the connection between the rear diffuser segment and the second arc segment is tangent.

[0017] The radius of the first arc segment is R1, the radius of the second arc segment is R2, and R1 < R2 ≤ 1.6R3.

[0018] The above settings allow the airflow to enter the diffuser section more concentratedly, reducing airflow separation and turbulence, and minimizing abnormal noises generated by the gas flow.

[0019] In an optional implementation, R3 is 71 mm, L = 5 mm, 80 ≤ R1 ≤ 90 mm, and 110 ≤ R2 ≤ 113 mm.

[0020] It can make the airflow enter the diffuser section more concentrated, reduce airflow separation and turbulence, and reduce the abnormal noise generated by the gas flow.

[0021] In an optional implementation, R1 is 86.3 mm or 89.3 mm, and R2 is 111.2 mm.

[0022] In an optional implementation, the central angle corresponding to the first arc segment is α1, the central angle corresponding to the second arc segment is α2, α1+α2=90°, and α1>α2.

[0023] The above settings provide a wider flow path for the airflow, allowing it to be evenly distributed over a larger area. The smaller central angle ensures a smooth transition of the airflow to the diffuser section, reducing resistance and improving efficiency.

[0024] In an optional implementation, α1 = 50°, α2 = 40°.

[0025] In an optional embodiment, a front diffuser section is provided at the end of the front volute near the air outlet, and a diffusion angle A is formed between the front diffuser section and the rear diffuser section, where A is 27°.

[0026] With the above settings, the 27° diffusion angle ensures a smooth transition of airflow between the front and rear diffusion sections, reduces airflow separation and local turbulence, improves airflow uniformity, effectively reduces airflow resistance loss in the diffusion section, and thus effectively increases the output air volume.

[0027] In an optional implementation, the front diffuser section and the end of the front volute near the air outlet are connected by a connecting arc section.

[0028] Through the above design, the arc segment reduces abrupt changes in airflow between different areas, thereby reducing drag loss.

[0029] An air conditioner provided in this embodiment of the invention includes an air duct assembly and a fan blade. The air duct assembly includes a front volute and a rear volute. A rear diffuser section is provided at the end of the rear volute near the air outlet, and a rear volute tongue is provided at the end of the rear volute near the air inlet. A guide arc section is provided on the side of the rear volute near the fan blade, having a first end and a second end opposite to each other. The second end is connected to and tangent to the rear diffuser section, and the first end is connected to the rear volute tongue. The radius of the guide arc section increases in the direction near the rear diffuser section, and the distance between the guide arc section and the fan blade gradually increases in the direction near the rear diffuser section. The first end has a preset distance L between it and the fan blade. The radius of the fan blade is R3, and the guide arc section has a minimum radius R1, where R3 + L ≤ R1 < 1.3R3. The smaller radius of the guide arc section reduces the flow area inside the volute, thereby increasing the gas velocity and allowing the airflow to enter the diffuser section more concentratedly, reducing airflow separation and turbulence, and ultimately increasing the air volume. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the air conditioner provided in this embodiment;

[0032] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0033] Figure 3 The line graph showing the relationship between the rear volute radius and the air volume growth rate in this embodiment.

[0034] Icons: 1-Air conditioner; 100-Air duct assembly; 110-Rear volute; 111-Rear diffuser section; 112-Rear volute tongue; 113-Air guide arc section; 1131-First arc section; 1132-Second arc section; 1133-First end; 1134-Second end; 120-Front volute; 121-Front diffuser section; 122-Connecting arc section; 130-Fan blade mounting cavity; 131-Air outlet; 132-Air inlet; 200-Fan blade. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0039] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0040] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0041] Some existing air conditioners have poor airflow, which can easily cause abnormal noises due to poor air intake. Research has found that the profile of the rear volute affects the airflow and noise of the air conditioner. The profile of the rear volute is mainly determined by the radius of the rear volute. Different radii of the rear volute affect the airflow area inside the air conditioner, which in turn affects the airflow velocity and ultimately affects the change in airflow. The profile of the rear volute in some current air conditioners tends to result in a lower airflow.

[0042] Therefore, embodiments of the present invention provide an air conditioner that allows for smoother airflow within the air conditioner, thereby increasing the air volume output of the air conditioner and reducing abnormal noises caused by poor airflow.

[0043] The following describes in detail, with reference to the accompanying drawings, the specific structure of an air conditioner provided by an embodiment of the present invention and the corresponding technical effects it brings.

[0044] Please refer to Figures 1-2 An air conditioner 1 provided in this embodiment of the invention includes an air duct assembly 100 and a fan blade 200. The air duct assembly 100 includes a front volute 120 and a rear volute 110. The front volute 120 and the rear volute 110 are arranged opposite to each other and together define a fan blade mounting cavity 130 for mounting the fan blade 200. An air outlet 131 is formed on one side of the fan blade mounting cavity 130 and an air inlet 132 is formed on the other side.

[0045] The rear volute 110 has a rear diffuser section 111 at one end near the air outlet 131 and a rear volute tongue 112 at one end near the air inlet 132. The rear volute 110 has a guide arc section 113 on one side near the fan blade 200. The guide arc section 113 has a first end 1133 and a second end 1134. The second end 1134 is connected to and tangent to the rear diffuser section 111, and the first end 1133 is connected to the rear volute tongue 112. The radius of the arc of the guide arc section 113 increases in the direction near the rear diffuser section 111. The distance between the guide arc section 113 and the fan blade 200 gradually increases in the direction near the rear diffuser section 111. The first end 1133 and the fan blade 200 have a preset distance L. The radius of the fan blade 200 is R3, and the guide arc section has a minimum radius R1.

[0046] In other words, the radius of the arc at the end of the air guide arc segment that is far from the rear diffuser section 111 is R1.

[0047] In some existing air conditioners 1, R1 is greater than or equal to 1.3 times R3, resulting in louder noise from gas flow and poorer air output within the air conditioner 1.

[0048] Optionally, in this embodiment, R3+L≤R1<1.3R3.

[0049] Understandably, when R1 is within the range of [R3+L, 1.3R3), relative to R1 being greater than or equal to 1.3 times R3, when the fan blade 200 rotates at the same speed, and the diffuser section remains unchanged, and the end of the guide arc section away from the rear diffuser section 111 has a preset distance L from the fan blade 200, a smaller radius can reduce the flow area inside the volute, thereby increasing the gas velocity, allowing the airflow to enter the diffuser section more concentratedly, reducing airflow separation and turbulence, and reducing abnormal noise generated by the gas flow. Since the diffuser section remains unchanged, the airflow gradually decelerates and increases in pressure after entering the diffuser section, ultimately increasing the output air volume.

[0050] For example, in some embodiments, R3 is 71mm, L = 5mm, and 80 ≤ R1 ≤ 90mm. It is understandable that because R1 is between [80mm, 90mm], it avoids the situation where the radius of the arc section near the rear diffuser section 111 is too small, causing airflow separation or turbulence upon entering the arc section. It also avoids the situation where the radius of the arc section near the rear diffuser section 111 is too large, increasing the gas flow area and thus reducing the gas velocity, thereby affecting the airflow volume of the fan blades 200 at the same rotational speed.

[0051] Optionally, in some embodiments, R1 is 86.3 mm or 89.3 mm.

[0052] In detail, in this embodiment, the air guide arc segment 113 also includes a first arc segment 1131 and a second arc segment 1132 that are connected and tangent to each other. The rear diffuser segment 111 is connected to the end of the second arc segment 1132 away from the first arc segment 1131, and the connection between the rear diffuser segment 111 and the second arc segment 1132 is tangent.

[0053] Understandably, since the rear diffuser section 111 is close to the air outlet 131 of the air conditioner 1, and the end of the second arc section 1132 away from the first arc section 1131 is tangent to the rear diffuser section 111, the transition between the second arc section 1132 and the rear diffuser section 111 is smooth and unobstructed, avoiding unnecessary resistance and turbulence at the junction of the two. Moreover, the tangential connection can make the airflow evenly distributed throughout the volute, reducing energy loss and improving overall efficiency.

[0054] It should be noted that in this embodiment, the radius of the first arc segment 1131 is R1, and the radius of the second arc segment 1132 is R2, where R1 < R2 ≤ 1.6R3. Similarly, some existing second arc segments 1132 have larger radii; for example, R2 is greater than 1.6 times R3. 3， The airflow noise inside air conditioner 1 is relatively loud, and the air volume is poor.

[0055] When the fan blade 200 rotates at the same speed, and the diffuser section remains unchanged, and the end of the first arc segment 1131 that is away from the rear diffuser section 111 has a preset distance L from the fan blade 200, the smaller radius of the second arc segment 1132 can reduce the flow area inside the volute, thereby increasing the gas velocity. This allows the airflow to enter the diffuser section more concentratedly, reducing airflow separation and turbulence, and minimizing abnormal noises generated during gas flow. Since the diffuser section remains unchanged, the airflow gradually decelerates and increases in pressure after entering the diffuser section, ultimately increasing the output air volume.

[0056] For example, in some embodiments, R3 is 71mm, L = 5mm, 80≤R1≤90mm, and 110≤R2≤113mm. It is understandable that since R1 is between [80mm, 90mm] and R2 is between [110mm, 113mm], this avoids the second arc segment 1132 having an excessively small arc radius near the rear diffuser section 111, which could cause airflow separation or turbulence upon entering the guide arc segment. It also avoids the second arc segment 1132 having an excessively large arc radius near the rear diffuser section 111, which would increase the gas flow area, thereby reducing the gas velocity and affecting the airflow volume of the fan blade 200 at the same rotational speed.

[0057] For example, please refer to Figures 2-3 When R3 is 71mm and L is 5mm, with the fan blade rotating at the same speed of 200, the air volume of the volute is based on the air volume of R1 being 92.3mm and R2 being 113.2mm.

[0058] Optionally, in order to ensure that the end of the first arc segment 1131 away from the second arc segment 1132 has a preset distance of 5mm from the fan blade 200, and to ensure that the second arc segment 1132 is tangent to the rear diffuser segment 111 while the rear diffuser segment 111 remains unchanged.

[0059] Optionally, 80mm≤R1<92mm, 111mm≤R2<113.6.

[0060] In the case of a rear volute 110 with R1 of 86.3mm and R2 of 111.2mm, for example 1, the air volume growth rate is approximately 2% compared to R1 of 92.3mm and R2 of 113.2mm.

[0061] When the rear volute 110 has R1 of 89.3mm and R2 of 112.2mm, taking this as example 2, the air volume growth rate is approximately 0.3% compared to R1 of 92.3mm and R2 of 113.2mm.

[0062] When the rear volute 110 has R1 of 95.3mm and R2 of 114.2mm, taking this as example 3, the air volume growth rate is approximately -3.8% compared to R1 of 92.3mm and R2 of 113.2mm.

[0063] Optionally, based on the above analysis, in some embodiments, in order to ensure the air volume, R3 is 71mm, L is 5mm, R1 is 86.3mm, and R2 is 111.2mm.

[0064] Alternatively, in some other embodiments, in order to ensure air volume, R3 is 71mm, L is 5mm, R1 is 89.3mm, and R2 is 112.2mm.

[0065] Of course, in other embodiments, when R3 is 71mm and L is 5mm, R1 can also be 80mm, 81mm, 82mm, 83mm, 84mm, 85mm, 86mm, 87mm, 88mm, 89mm or 90mm. R2 can also be 111mm, 111.5mm, 112mm, 112.4mm, 112.5mm, 112.8mm or 113mm.

[0066] Of course, the preset spacing L mentioned above is not limited to 5mm. The preset spacing L can also be 4mm, 4.5mm, 5.5mm or 6mm.

[0067] In detail, in this embodiment, the circular angle corresponding to the first arc segment 1131 is α1, and the central angle corresponding to the second arc segment 1132 is α2, where α1 + α2 = 90°, and α1 > α2. That is, the smaller arc radius of the first arc segment 1131 allows the airflow to quickly concentrate upon entering the volute, forming a higher initial velocity. The larger central angle allows for more turning space, reducing local turbulence and separation, and improving airflow uniformity. The larger arc radius of the second arc segment 1132 provides a wider flow path for the airflow, enabling it to be evenly distributed over a larger area. Its smaller central angle ensures a smooth transition of the airflow to the diffuser section, reducing resistance and improving efficiency.

[0068] The sum of the central angles of the two arcs is 90°, which ensures both the concentration of airflow and the uniform distribution and efficient diffusion of airflow.

[0069] Optionally, in this embodiment, α1 = 50° and α2 = 40°.

[0070] A front diffuser section 121 is provided at the end of the front volute 120 near the air outlet, and a diffusion angle A is formed between the front diffuser section 121 and the rear diffuser section 111. Optionally, the diffusion angle A is 27°.

[0071] Understandably, the existence of the diffusion angle A allows the airflow to gradually decelerate when it enters the rear diffusion section 111 after passing through the front diffusion section 121. The 27° diffusion angle ensures a smooth transition of the airflow between the front and rear diffusion sections 111, reduces airflow separation and local turbulence, improves the uniformity of the airflow, effectively reduces the resistance loss of the airflow in the diffusion section, and thus effectively increases the output air volume.

[0072] Optionally, the front diffuser section 121 and the end of the front volute 120 near the air outlet 131 are connected by a connecting arc section 122. Understandably, the design of the arc section reduces abrupt changes in airflow between different areas and reduces drag loss.

[0073] The front diffuser section 121 and the front volute 120 are both tangent to the connecting arc section 122. The smooth transition allows the airflow to enter the volute more smoothly, achieving a highly efficient diffusion effect. Furthermore, the tangent design can better disperse stress, avoid stress concentration at a certain point, improve the stability of the overall structure, and reduce the noise generated by airflow impact.

[0074] In summary, the air conditioner 1 provided by the embodiments of the present invention includes an air duct assembly 100 and a fan blade 200. The air duct assembly 100 includes a front volute and a rear volute. The front volute and the rear volute are arranged opposite to each other and together define a fan blade mounting cavity 130 for mounting the fan blade. An air outlet 131 is formed on one side of the fan blade mounting cavity 130 and an air inlet 132 is formed on the other side. The rear volute 110 has a rear diffuser section 111 at one end near the air outlet 131 and a rear volute tongue 112 at one end near the air inlet 132. The rear volute 110 has a guide arc section 113 on one side near the fan blade 200. The guide arc section 113 has a first end 1133 and a second end 1134. The second end 1134 is connected to and tangent to the rear diffuser section 111, and the first end 1133 is connected to the rear volute tongue 112. The radius of the arc of the guide arc section 113 increases in the direction near the rear diffuser section 111. The distance between the guide arc section 113 and the fan blade 200 gradually increases in the direction near the rear diffuser section 111. The first end 1133 and the fan blade have a preset distance L. The radius of the fan blade 200 is R3. The guide arc section 113 has a minimum radius R1, where R3+L≤R1<1.3R3. The air guide arc section 113 has a smaller radius, which can reduce the flow area inside the volute, thereby increasing the gas velocity so that the airflow enters the diffuser section more concentratedly, reducing airflow separation and turbulence, and ultimately increasing the output air volume.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An air conditioner, characterized in that, Includes air duct assembly (100) and fan blades (200); The air duct assembly (100) includes a front volute (120) and a rear volute (110). The front volute (120) and the rear volute (110) are arranged opposite to each other and together define a fan blade mounting cavity (130) for mounting the fan blade (200). An air outlet (131) is formed on one side of the fan blade mounting cavity (130), and an air inlet (132) is provided on the other side. The rear volute (110) is provided with a rear diffuser section (111) at one end near the air outlet (131), and the rear volute (110) is provided with a rear volute tongue (112) at one end near the air inlet (132). The rear volute (110) has a guide arc segment (113) on the side near the fan blade (200). The guide arc segment (113) has a first end (1133) and a second end (1134) opposite to each other. The first end (1133) is connected to the rear volute tongue (112), and the second end (1134) is connected to the rear diffuser section (111). The radius of the arc of the guide arc segment increases in the direction near the rear diffuser section (111), and the distance between the guide arc segment and the fan blade (200) gradually increases in the direction near the rear diffuser section (111). The first end (1133) and the fan blade (200) have a preset distance L. The guide arc segment has a minimum radius of R1, and the fan blade (200) has a radius of R3, where R3+L≤R1<1.3R3.

2. The air conditioner according to claim 1, characterized in that: R3 is 71mm, L = 5mm, and 80 ≤ R1 ≤ 90mm.

3. The air conditioner according to claim 2, characterized in that: R1 is 86.3 mm or 89.3 mm.

4. The air conditioner according to claim 1, characterized in that: The air-guiding arc segment includes a first arc segment (1131) and a second arc segment (1132) that are connected and tangent to each other. The rear diffuser segment (111) is connected to the end of the second arc segment (1132) away from the first arc segment (1131), and the connection between the rear diffuser segment (111) and the second arc segment (1132) is tangent. Wherein, the radius of the first arc segment (1131) is R1, the radius of the second arc segment (1132) is R2, and R1 < R2 ≤ 1.6R3.

5. The air conditioner according to claim 4, characterized in that: R3 is 71mm, L = 5mm, 80≤R1≤90mm, 110≤R2≤113mm.

6. The air conditioner according to claim 4, characterized in that: R1 is 86.3 mm or 89.3 mm, and R2 is 111.2 mm.

7. The air conditioner according to claim 4, characterized in that: The central angle corresponding to the first arc segment (1131) is α1, and the central angle corresponding to the second arc segment (1132) is α2. α1+α2=90°, α1>α2.

8. The air conditioner according to claim 7, characterized in that: α1＝50°，α2＝40°。 9. The air conditioner according to claim 1, characterized in that: The front volute (120) is provided with a front diffuser section (121) at one end near the air outlet. The front diffuser section (121) and the rear diffuser section (111) form a diffuser angle A, which is 27°.

10. The air conditioner according to claim 9, characterized in that: The front diffuser section (121) and the front volute (120) near the air outlet (131) are connected by a connecting arc section (122).

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