Air conditioner volute tongue, air conditioner indoor unit and air conditioner

Abstract

The invention discloses an air conditioner volute tongue, an air conditioner indoor unit and an air conditioner in the technical field of air conditioner products. According to the air conditioner volute tongue, a windward face and an air guide face are arranged on a volute tongue body, a plurality of flow guide ribs are arranged in the length direction of the volute tongue body at intervals, flow guide grooves are formed between the adjacent flow guide ribs, and the flow guide ribs are parallel to the cross section of the volute tongue body; and the tail end connecting lines of the plurality of diversion ribs in each group on the windward side are in sine and cosine distribution. Flow guide ribs are arranged on the windward side of the volute tongue, so that return air flow integration is facilitated; the connecting line of the tail ends of the flow guide ribs on the windward side of the volute tongue body is in sine and cosine changes, the speed between the volute tongue and a fan flow channel can be effectively dispersed, pressure distribution is integrated, and disturbance of return air flow to a fan is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning products, and in particular to an air-conditioning volute, an air-conditioning indoor unit and an air-conditioner. Background Art

[0002] With the rapid development of science and technology and the improvement of people's quality of life, users have higher and higher requirements for household air-conditioning products. They not only require exquisite appearance, but also require comfortable user experience when the air conditioner is working. Noise, as an important indicator to measure user experience when the air conditioner is running, has also attracted more and more attention. Studies have found that the volute tongue structure and the cross-flow fan have a great impact on the noise when the indoor unit of the air conditioner is running. The existing air-conditioning volute tongue includes a volute tongue body that is used to be set in the indoor unit body and corresponds to the volute case. In practice, the volute tongue body includes a windward surface and a wind guide surface. The windward surface is the side of the volute tongue body facing the cross-flow fan. The volute tongue body is provided with guide ribs distributed at intervals along the length direction of the volute tongue body. The guide ribs extend across the windward surface and the wind guide surface, and are parallel to the cross section of the volute tongue body. The structure of each guide rib is the same. This volute tongue structure has little noise reduction effect during the use of the air conditioner. Moreover, most of the existing cross-flow fans have straight blades. When the speed of the cross-flow fan is too high, not only will the outlet airflow have a significant impact on the volute tongue structure, but the return airflow will also impact the fan blades when passing through the end of the volute tongue body, inducing a sharp whistling sound and reducing the user experience. Summary of the invention

[0003] In order to overcome the technical problem that the existing volute structure inside the air conditioner has a relatively small noise reduction effect, the present invention provides an air conditioner volute, an air conditioner indoor unit and an air conditioner.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] An air-conditioning volute tongue, wherein a windward surface and a wind-guiding surface are provided on the volute tongue body, a plurality of guide ribs are arranged at intervals in the length direction of the volute tongue body, guide grooves are formed between adjacent guide ribs, the guide ribs and the cross-section of the volute tongue body are parallel to each other, at least one group of guide ribs is provided on the windward surface, and the end connecting lines of the plurality of guide ribs in each group of guide ribs on the windward surface are in a sine and cosine distribution.

[0006] In the present application, guide ribs are arranged on the windward surface of the volute tongue, which is beneficial to integrating the return air flow; the connecting line of the ends of the guide ribs on the windward surface of the volute tongue body presents sine and cosine variations, which can effectively disperse the speed between the volute tongue and the fan flow channel, integrate the pressure distribution, and reduce the disturbance of the return air flow to the fan.

[0007] In some embodiments, the extension length of the guide ribs on the windward surface is y1, the extension direction of the volute tongue body is the x-axis, and the distribution of the guide ribs in each group satisfies:

[0008] Where 10≤A1≤15,

[0009] 10≤B1≤15.

[0010] In some embodiments, the width of the guide groove is 1 mm-4 mm.

[0011] In some embodiments, the guide rib extends across the windward surface and the wind guiding surface. At the junction of the windward surface and the wind guiding surface, the guide rib has the largest depth. The guide rib depth gradually decreases in both directions extending toward the windward surface and toward the wind guiding surface at the junction.

[0012] In some embodiments, a line connecting one end of the distal tongue body at the maximum depth corresponding to multiple guide ribs in each group of guide ribs is in a sine-cosine distribution.

[0013] In some embodiments, the maximum depth of the guide ribs is y2, the extension direction of the volute tongue body is the x-axis, and the distribution of the guide ribs in each group satisfies:

[0014] Where 1≤A2≤5, 1≤B2≤5.

[0015] Furthermore, the extension length of the guide rib on the windward surface is y1, and the extension direction of the volute tongue body is the x-axis. The distribution of the guide ribs in each group satisfies:

[0016] Where 10≤A1≤15,

[0017] 10≤B1≤15;

[0018] The distribution of the internal guide ribs of each group satisfies: ω1=ω2, and in the extension direction of the snail tongue body, the points corresponding to the maximum values ​​of y1 and y2 are consistent.

[0019] The present invention also provides an air-conditioning indoor unit, comprising the air-conditioning volute described in any of the above embodiments, and also comprising a casing and a crossflow fan. The side of the volute body close to the crossflow fan is the windward surface, and the crossflow fan is composed of a plurality of oblique blades.

[0020] In some embodiments, the length of each oblique blade in the cross-flow fan is 46 mm-50 mm, and the staggered angle of the oblique blade is 2.5°-4.9°.

[0022] The present invention also provides an air conditioner, comprising the above-mentioned air conditioner indoor unit.

[0023] The beneficial effects of the present invention are:

[0024] 1. Arranging guide ribs on the windward surface of the volute tongue body is beneficial to integrating the return airflow; the connecting line of the guide ribs at the end of the windward surface changes in sine and cosine, which can effectively disperse the speed between the volute tongue and the fan flow channel, integrate the pressure distribution, and reduce the disturbance of the return airflow to the fan; and in the axial direction, the depth of the guide ribs changes, and the gap between the volute tongue body and the cross-flow fan is in a changing state. The guide ribs with a small gap from the cross-flow fan can cut the airflow first, and the guide ribs with a large gap from the cross-flow fan can cut the return airflow later, preventing the volute tongue body structure from cutting the airflow at the same time, reducing the intensity of the cutting airflow, and helping to improve the howling.

[0025] 2. Use a multi-section fan, each section of the fan can correspond to one or more guide rib periodic tooth numbers, and each section of the fan corresponds to multiple variable tooth depths and guide rib windward surface heights, which can further disperse the intensity of the volute tongue cutting the airflow and reduce the intensity of high-frequency noise.

[0026] 3. Compared with the original fan, the oblique fan blades can greatly increase the air volume at the same speed; and at the same air volume, the lower the fan speed, the more conducive to reducing the air conditioner whistling sound; and the blades of the fan with oblique fan blades have a certain curvature, which helps to diffuse the wind and make the wind softer. Therefore, the oblique fan blades are matched with the snail tongue body with the aforementioned sine-cosine distribution guide ribs to reduce the decibel value of high-frequency noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a cross section of an air duct of an indoor unit of an air conditioner provided by the present invention;

[0028] Figure 2 for Figure 1 A partial enlarged view of

[0029] Figure 3 for Figure 1 Schematic cross-section of the middle tongue of the middle snail;

[0030] Figure 4 for Figure 3 A partial enlarged view of

[0031] Figure 5 for Figure 1 A schematic structural diagram of another embodiment of the middle snail tongue body;

[0032] Figure 6 for Figure 1 A schematic structural diagram of another embodiment of the middle snail tongue body;

[0033] Figure 7 for Figure 1 A schematic structural diagram of another embodiment of the middle snail tongue body;

[0034] Figure 8 for Figure 1 The structural diagram of the indoor unit of the air conditioner after switching the viewing angle;

[0035] Fig. 9 for Figure 1 Noise spectrum of the middle snail tongue structure in two states: with straight blades and with oblique blades;

[0036] Fig.10 A comparison chart of the rotation speed and air volume of the original volute tongue body with straight fan blades and the volute tongue body of the present invention with oblique fan blades.

[0037] Marked in the figure are, 1-cross-flow fan, 2-casing, 3-volute tongue body, 31-windward surface, 32-wind guide surface, 33-guide rib, 4-oblique fan blade. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings.

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] like Figure 1-Figure 10 As shown, the present invention provides an air conditioner indoor unit.

[0041] The indoor unit of the air conditioner comprises a casing 2, in which a cross-flow fan 1 and an air conditioner volute are arranged.

[0042] An air conditioning volute, a volute body 3 is provided with a windward surface 31 and a wind guide surface 32, a plurality of guide ribs 33 are arranged at intervals in the length direction of the volute body 3, a guide groove is formed between adjacent guide ribs 33, the guide ribs 33 and the cross-sections of the volute body 3 are parallel to each other, at least one group of guide ribs 33 is provided on the windward surface 31, and the end connecting lines of the plurality of guide ribs 33 in each group of guide ribs 33 on the windward surface 31 are in a sine and cosine distribution.

[0043] In the present application, the guide ribs 33 are provided on the windward surface 31 of the volute tongue, which is beneficial to integrating the return air flow; the terminal connecting lines of the guide ribs 33 on the windward surface 31 of the volute tongue body 3 show sine and cosine variations, which can effectively disperse the speed between the volute tongue and the fan flow channel, integrate the pressure distribution, and reduce the disturbance of the return air flow to the fan.

[0044] Here, a group of guide ribs 33 is a guide rib 33 of a sine-cosine cycle. Figure 2-Figure 7 , and does not limit the guide ribs 33 to be exactly an integer group.

[0045] Reference Figure 1The windward surface 31 is the side of the volute tongue body 3 close to the cross-flow fan 1 when used in the indoor unit of the air conditioner; the wind-guiding surface 32 is the side of the volute tongue body 3 away from the cross-flow fan 1. The windward surface 31 and the wind-guiding surface 32 are transitioned by a curved arc, and the radius of the arc is 0mm-7mm. In this embodiment, the guide rib 33 also has an arc transition at the junction of the windward surface 31 and the wind-guiding surface 32.

[0046] The guide rib 33 and the cross section of the volute tongue body 3 are parallel to each other, that is, the length extension direction of the guide rib 33 on the windward surface 31 and the depth extension direction perpendicular to the windward surface 31 are parallel to the cross section of the volute tongue body 3. Similarly, the intersection of the guide rib 33 at the windward surface 31 and the wind guide surface 32 and the extension direction of the guide rib 33 on the wind guide surface 32 can be obtained.

[0047] In this embodiment, the extension length of the guide rib 33 on the windward surface 31 is y1, and the extension direction of the volute tongue body 3 is the x-axis. The distribution of the guide ribs 33 in each group satisfies:

[0048] Where 10≤A1≤15,

[0049] 10≤B1≤15.

[0050] In practice, when A1>B1, the value of y1 may be negative, and in this case, the curve segment with a positive value of y1 should be used as a reference for arranging the extension length of the guide rib 33. Preferably, A1≤B1 can also be selected when designing the value.

[0051] Although only the aforementioned sine formula is mentioned here, based on the convertibility of sine waves and cosine waves, it is generally referred to that the terminal connection line of the plurality of guide ribs 33 in each group of guide ribs 33 on the windward surface 31 is in a sine-cosine distribution.

[0052] In this embodiment, the width of the guide groove is 1 mm to 4 mm. The width of the guide groove is the distance between adjacent guide ribs 33. Under the premise of being determined by the above-mentioned sine and cosine formulas, the number of guide ribs 33 in one cycle is related to the width of the guide groove.

[0053] In this embodiment, the guide rib 33 extends across the windward surface 31 and the wind guiding surface 32. At the junction of the windward surface 31 and the wind guiding surface 32, the depth of the guide rib 33 is the largest. In both directions of extending toward the windward surface 31 and toward the wind guiding surface 32 at the junction, the depth of the guide rib 33 gradually decreases.

[0054] Reference Figure 2As shown, the extension length of the guide rib 33 on the windward surface 31 is constantly changing, specifically showing the change according to the aforementioned sine and cosine formulas. The extension length on the wind guide surface 32 remains the same, that is, the ends of the guide rib 33 on the wind guide surface 32 are flush and on the same straight line, so that the gas flowing out of each guide groove on the guide surface remains consistent.

[0055] In this embodiment, the connecting line of the end of the far volute tongue body 3 at the maximum depth corresponding to the multiple guide ribs 33 in each group of guide ribs 33 is in a sine and cosine distribution. In the axial direction, the depth of the guide ribs 33 changes, and the gap between the volute tongue body 3 and the crossflow fan 1 is in a changing state. The guide ribs 33 with a small gap from the crossflow fan 1 can cut the airflow first, and the guide ribs 33 with a large gap from the crossflow fan 1 can cut the return airflow later, so as to prevent the volute tongue body 3 structure from cutting the airflow at the same time, reduce the intensity of the cutting airflow, and help improve the howling.

[0056] Please refer to Figure 2 and Figure 4 , it can be obtained that the extension lengths of the guide ribs 33 on the windward surface 31 are different, and the maximum depths of the guide ribs 33 are different.

[0057] In this embodiment, the maximum depth of the guide ribs 33 is y2, the extending direction of the tongue body 3 is the x-axis, and the distribution of the guide ribs 33 in each group satisfies:

[0058] Where 1≤A2≤5, 1≤B2≤5.

[0059] In practice, when A2>B2, the value of y2 may be negative, and in this case, the curve segment with a positive value of y2 should be used as a reference for the arrangement of the maximum depth of the guide rib 33. Preferably, A2≤B2 can also be selected when designing the value.

[0060] In combination with the above, the extension length of the guide rib 33 on the windward surface 31 is y1, and the extension direction of the volute tongue body 3 is the x-axis. The distribution of the guide ribs 33 in each group satisfies:

[0061] Where 10≤A1≤15,

[0062] 10≤B1≤15;

[0063] The distribution of each group of internal guide ribs 33 satisfies: ω1=ω2, and the points corresponding to the maximum values ​​of y1 and y2 are consistent in the extension direction of the tongue body 3. In practice, the points corresponding to the maximum values ​​of y1 and y2 may not be provided with guide ribs 33. The emphasis here is to emphasize that the extension length of each group of internal guide ribs 33 on the windward surface 31 and the maximum depth variation period of the guide ribs 33 are consistent, and the wave crest appears on the same guide rib 33, which not only improves the noise reduction effect, but also facilitates processing implementation.

[0064] Reference Figure 5-Figure 7 The present invention also provides different implementations of the guide ribs 33 extending at different lengths on the windward surface 31. In the following embodiments, the motor end and the bearing end are used as the two ends of the volute tongue body 3.

[0065] For example, Figure 5 In the example, starting from the motor end, the gap between teeth remains unchanged, the number of guide ribs 33 (hereinafter referred to as guide ribs 33 as teeth, and the number of guide ribs 33 as the number of worm tongue teeth) corresponding to different periods is different, the shallowest tooth depth is 0 mm, and the deepest tooth depth is 3 mm. Specifically, the number of worm tongue teeth in the first period is set to 13, the number of worm tongue teeth in the second period is set to 15, the number of worm tongue teeth in the third period is set to 17, and so on, the number of worm tongue teeth in the n1th period is 13+2(n1-1), n1≥1.

[0066] For example, Figure 6 In the figure, taking the motor end as the starting point, the gap between teeth remains unchanged, the shallowest tooth depth is 0 mm, and the deepest tooth depth is 3 mm. The number of volute tongue teeth in the first cycle is set to 17, the number of volute tongue teeth in the second cycle is set to 15, the number of volute tongue teeth in the third cycle is set to 13, and so on. The number of volute tongue teeth in the n2th cycle is 17-2(n2-1), n2≥1.

[0067] For example, in some embodiments, the middle position of the extension direction of the volute tongue body 3 is taken as the starting point, the gap between the teeth remains unchanged, the number of corresponding guide ribs 33 in different periods is different, the shallowest tooth depth is 0 mm, and the deepest tooth depth is 3 mm. Specifically, the number of volute tongue teeth from the middle starting position of the volute tongue body 3 to the motor end in the first period is set to 1, the number of volute tongue teeth in the second period is set to 3, the number of volute tongue teeth in the third period is set to 5, and so on. The number of volute tongue teeth in the n3th period is 2n3-1, n3≥1. In addition, the arrangement of the number of volute tongue teeth from the middle starting position of the volute tongue body 3 to the bearing end is symmetrical to the arrangement of the teeth from the middle starting position of the volute tongue body 3 to the motor end, and the symmetry point is the middle starting position of the volute tongue body 3.

[0068] For example, Figure 7In the figure, the middle position of the extension direction of the volute tongue body 3 is taken as the starting point, the gap between the teeth remains unchanged, the number of corresponding guide ribs 33 in different periods is different, the shallowest tooth depth is 0mm, and the deepest tooth depth is 3mm. Specifically, the number of volute tongue teeth in the first period from the middle starting position of the volute tongue body 3 to the motor end is set to 15, the number of volute tongue teeth in the second period is set to 13, the number of volute tongue teeth in the third period is set to 11, and so on. The number of volute tongue teeth in the n4th period is 15-2(n4-1), n4≥1. In addition, the arrangement of the number of volute tongue teeth from the middle starting position of the volute tongue body 3 to the bearing end is symmetrical to the arrangement of the teeth from the starting position of the volute tongue body 3 to the motor end, and the symmetry point is the middle starting position of the volute tongue body 3.

[0069] The aforementioned embodiments show that the number of teeth in each cycle can be changed. When a multi-section fan is used, each section of the fan can correspond to one or more teeth in the guide rib 33 cycle, and each section of the fan corresponds to multiple variable tooth depths and windward surface 31 heights of the guide rib 33, that is, the aforementioned y2 and y1. The intensity of the volute tongue body 3 structure cutting the airflow can be further dispersed, reducing the intensity of high-frequency noise.

[0070] In this embodiment, Figure 8 As shown, the cross-flow fan 1 is composed of a plurality of oblique blades 4. The length of each oblique blade 4 in the cross-flow fan 1 is 46 mm-50 mm, and the stagger angle of the oblique blade 4 is 2.5°-4.9°. In this embodiment, the outer diameter of the oblique blade 4 is 108 mm, and the distance between the end of the guide rib 33 on the volute tongue body 3 in the direction of the extended length on the windward surface 31 and the outer diameter of the cross-flow fan 1 is controlled to be 5 mm-8 mm.

[0071] like Fig. 9 As shown, the noise spectrum diagram of the snail tongue body 3 structure in this embodiment in two states of cooperation with straight wind blades and cooperation with oblique wind blades 4 is shown. This figure is an FFT noise spectrum diagram, the horizontal axis is the noise frequency, the vertical axis is the noise decibel value, the green curve is the original state - that is, the state of cooperation with straight wind blades, and the red curve is the state of cooperation with oblique wind blades 4. From the spectrum diagram, it can be seen that the green curve has multiple cusp values ​​at 1000HZ-1600HZ, indicating that there is a high-frequency whistling sound in the original state of the air duct, while the red curve eliminates the cusp value near 1000HZ-1600HZ, and the overall cusp value of the red curve is lower than the green curve, indicating that the improved air duct effectively eliminates high-frequency whistling sound.

[0072] Fig.10A speed-air volume comparison diagram of the original volute tongue body 3 with straight wind blades and the volute tongue body 3 of the present invention with oblique wind blades 4 is shown. By comparison, it can be found that after the improvement, compared with the original state, the cross-flow fan 1 in this embodiment can greatly increase the air volume value at the same speed. Under the same air volume, the lower the fan speed, the more conducive to reducing the air-conditioning whistling sound; and the blades of the fan with oblique wind blades 4 have a certain curvature, which helps to diffuse the wind and make the wind softer. Therefore, the oblique wind blades 4 are matched with the volute tongue body 3 structure provided in this application, which is beneficial to further reduce the decibel value of high-frequency noise.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioner volute tongue, wherein a volute tongue body (3) is provided with a windward surface (31) and a wind guide surface (32), a plurality of guide ribs (33) are arranged at intervals in the length direction of the volute tongue body (3), a guide groove is formed between adjacent guide ribs (33), and the cross sections of the guide ribs (33) and the volute tongue body (3) are parallel to each other, wherein: At least one group of guide ribs (33) is provided on the windward surface (31), and the connecting lines of the ends of a plurality of guide ribs (33) in each group of guide ribs (33) on the windward surface (31) are in a sine-cosine distribution.

2. The air conditioning volute according to claim 1, characterized in that: With the extension length of the guide rib (33) on the windward surface (31) as y1 and the extension direction of the volute tongue body (3) as the x-axis, the distribution of the guide ribs (33) in each group satisfies: Where 10≤A1≤15, 10≤B1≤15。 3. The air conditioning volute according to claim 1, characterized in that: The width of the guide groove is 1mm-4mm.

4. The air conditioning volute according to any one of claims 1 to 3, characterized in that: The guide rib (33) extends across the windward surface (31) and the wind guiding surface (32); at the junction of the windward surface (31) and the wind guiding surface (32), the depth of the guide rib (33) is the largest; at the junction, in two directions extending toward the windward surface (31) and toward the wind guiding surface (32), the depth of the guide rib (33) gradually decreases.

5. The air conditioning volute as claimed in claim 4, characterized in that: A line connecting one end of the distal volute tongue body (3) at the maximum depth corresponding to a plurality of guide ribs (33) in each group of guide ribs (33) is in a sine-cosine distribution.

6. The air conditioning volute as claimed in claim 5, characterized in that: With the maximum depth of the guide rib (33) as y2 and the extension direction of the volute tongue body (3) as the x-axis, the distribution of the guide ribs (33) in each group satisfies: Where 1≤A2≤5, 1≤B2≤5.

7. The air conditioning volute as claimed in claim 6, characterized in that: With the extension length of the guide rib (33) on the windward surface (31) as y1 and the extension direction of the volute tongue body (3) as the x-axis, the distribution of the guide ribs (33) in each group satisfies: Where 10≤A1≤15, 10≤B1≤15； The distribution of each group of internal flow guide ribs (33) satisfies: ω1=ω2, and in the extension direction of the snail tongue body (3), the points corresponding to the maximum values ​​of y1 and y2 are consistent.

8. An indoor unit of an air conditioner, characterized in that: It comprises an air-conditioning volute as described in any one of claims 1 to 7, and also comprises a casing and a cross-flow fan (1), wherein the side of the volute body (3) close to the cross-flow fan (1) is a windward surface (31), and the cross-flow fan (1) is composed of a plurality of oblique blades (4).

9. The air conditioner indoor unit according to claim 8, characterized in that: The length of each oblique fan blade (4) in the cross-flow fan (1) is 46 mm to 50 mm, and the offset angle of the oblique fan blade (4) is 2.5° to 4.9°.

10. An air conditioner, characterized in that: It comprises the air-conditioning indoor unit as described in claim 8 or 9.

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