Air conditioner volute tongue, air conditioner indoor unit and air conditioner
By setting up a flow guide rib with a narrow upper and wide upper shape on the air conditioner snail tongue, which is similar to a pointed tines structure, the problem of poor noise reduction effect of the existing air conditioner snail tongue is solved, and stable cutting of airflow and significant reduction of noise is achieved.
Patent Information
- Application Number
- CN202411739102.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-01-14
AI Technical Summary
The existing air-conditioning snail tongue structure has less noise reduction effect during operation, and it is prone to high-frequency whistling sounds.
Design an air-conditioned worm tongue with windward surface and windward surface on the main body of the worm tongue, and multiple flow guide ribs are provided. The cross-sectional surface of the flow guide ribs and the cross-sectional surface of the worm tongue are parallel to each other, and the flow guide ribs on the windward surface are narrow. The lower wide state is similar to the tined form. It cuts and stabilizes the airflow through the sharp form of the flow guide rib, reducing airflow oscillation and pressure pulsation, thereby reducing noise.
Effectively cut and stabilize the airflow, reduce the aerodynamic noise of the fan, integrate the return airflow, reduce the disturbance of the return airflow to the fan, and significantly reduce the howling sound frequency.
Smart Images
Figure CN119309314A_ABST
Abstract
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 will 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 guide ribs are rectangular in shape facing the windward surface of the fan, such as Figure 1 and Figure 2 As shown, this snail tongue structure has little noise reduction effect during the use of the air conditioner and is prone to high-frequency howling sounds. 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, a volute tongue body is provided with a windward surface and a wind guide surface, 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, and the guide ribs on the windward surface are narrow at the top and wide at the bottom in the length extension direction of the guide ribs and in the depth extension direction of the guide ribs perpendicular to the windward surface.
[0006] In the present application, when the fan is running at high speed, since the guide ribs adopt the aforementioned narrow upper and wide lower shape, the guide ribs similar to sharp teeth are conducive to effectively cutting and stabilizing the airflow, reducing the problem of poor stability of the cross-flow fan due to airflow oscillation; and the sharp tooth structure can improve the pressure pulsation intensity of the airflow, change the vortex structure of the blade trailing edge, and thus reduce the aerodynamic noise of the fan.
[0007] In some embodiments, at least one group of guide ribs is provided on the windward surface, and the connecting lines of the ends of multiple guide ribs in each group of guide ribs on the windward surface are in a sine and cosine distribution.
[0008] 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:
[0009] Where 10≤A1≤15,
[0010] 10≤B1≤15.
[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] In some embodiments, on the contact surface between the guide rib and the windward surface, the shortest gap between the tops of adjacent guide ribs is a, the shortest gap between the bottoms of adjacent guide ribs is b, the width of the top of the guide rib is c, and the width of the bottom of the guide rib is d;
[0020] Among them, 2mm≤a≤5mm, 1mm≤b≤4mm, 0mm≤c≤2mm, 1mm≤d≤3mm.
[0021] The present invention also provides an air-conditioning indoor unit, comprising the air-conditioning volute in any of the above embodiments, and further comprising a casing and a cross-flow fan, wherein the side of the volute body close to the cross-flow fan is a windward surface.
[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. When the fan is running at high speed, since the guide ribs adopt the aforementioned narrow upper and wide lower shape, the guide ribs similar to sharp teeth are conducive to effectively cutting and stabilizing the airflow, reducing the problem of poor stability of the cross-flow fan due to airflow oscillation; and the sharp tooth structure can improve the pressure pulsation intensity of the airflow, change the vortex structure of the blade trailing edge, and thus reduce the aerodynamic noise of the fan.
[0025] 2. The guide ribs are arranged on the windward surface of the volute tongue body, which is beneficial to the integration of the return air flow; 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 air flow to the fan.
[0026] 3. 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. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of the snail tongue body in the prior art;
[0028] Figure 2 for Figure 1 A partial enlarged view of
[0029] Figure 3 A schematic diagram of the structure of the snail tongue body in the first embodiment provided by the present invention;
[0030] Figure 4 for Figure 3 A partial enlarged view of
[0031] Figure 5 It is a comparison chart of the air duct noise spectrum analysis in the implementation of the snail tongue body in Example 1 and the snail tongue body in the prior art;
[0032] Figure 6 This is a schematic diagram of the structure of the snail tongue body in the second embodiment provided by the present invention;
[0033] Figure 7 for Figure 6 A partial enlarged view of
[0034] Figure 8 It is a comparison chart of the spectrum analysis of the wind duct noise in the implementation of the snail tongue body in Example 2 and the snail tongue body in the prior art.
[0035] Marked in the figure are, 2-housing, 3-volute tongue body, 31-windward surface, 32-wind guide surface, 33-guide rib. DETAILED DESCRIPTION
[0036] The present invention is further described below in conjunction with the accompanying drawings.
[0037] 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.
[0038] Embodiment 1
[0039] like Figure 3-Figure 5 As shown, the present invention provides an air conditioning volute.
[0040] The air conditioning volute is used for an air conditioning indoor unit. The air conditioning indoor unit includes a casing 2 and a cross-flow fan. The cross-flow fan and the air conditioning volute are arranged in the casing 2.
[0041] Air conditioner volute, the 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 section of the volute body 3 are parallel to each other, in the length extension direction of the guide ribs 33 on the windward surface 31 and in the depth extension direction of the guide ribs 33 perpendicular to the windward surface 31, the guide ribs 33 on the windward surface 31 are all narrow at the top and wide at the bottom
[0042] The windward surface 31 is the side of the volute tongue body 3 close to the cross-flow fan 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. 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.
[0043] 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.
[0044] With such arrangement, each guide rib 33 is similar to a sharp sawtooth, referred to as a sharp tooth.
[0045] In the present application, when the fan is running at high speed, since the guide ribs 33 adopt the aforementioned narrow upper and wide lower shape, the ribs of the guide ribs 33 similar to sharp teeth are conducive to effectively cutting and stabilizing the airflow, reducing the problem of poor stability of the cross-flow fan due to airflow oscillation; and the sharp tooth structure can improve the pressure pulsation intensity of the airflow, change the vortex structure of the blade trailing edge, and thus reduce the aerodynamic noise of the fan.
[0046] In this embodiment, on the contact surface between the guide rib 33 and the windward surface 31, the shortest gap between the tops of adjacent guide ribs 33 is a, the shortest gap between the bottoms of adjacent guide ribs 33 is b, the width of the top of the guide rib 33 is c, and the width of the bottom of the guide rib 33 is d;
[0047] Among them, 2mm≤a≤5mm, 1mm≤b≤4mm, 0mm≤c≤2mm, 1mm≤d≤3mm.
[0048] The parameters are set as above to achieve a better noise reduction effect. In addition to the above parameters, the parameters related to the guide ribs 33 also include that the extension length of the guide ribs 33 on the windward surface 31 is y1, and the maximum depth of the guide ribs 33 is y2. In this embodiment, y1 and y2 are both constants. It is manifested that the heights of the ends of the guide ribs 33 on the windward surface 31 remain consistent, and the connecting line of the maximum depth of each guide rib 33 corresponding to the junction of the windward surface 31 and the wind-guiding surface 33 is a straight line. In some other embodiments, y1 and y2 change, for example, so that the heights of each guide rib 33 on the windward surface 31 are different, and multiple guide ribs 33 form undulating forms; or the maximum depths of each guide rib 33 at the junction of the windward surface 31 and the wind-guiding surface 32 are different, and multiple guide ribs 33 form undulating forms.
[0049] In this embodiment, when the volute tongue body 3 is used in an indoor unit of an air conditioner, the distance between the end of the guide rib 33 in the extending length direction on the windward surface 31 and the outer diameter of the fan is controlled to be 5mm-8mm.
[0050] Reference Figure 5 , the air conditioner volute tongue (pure sharp teeth) in this embodiment is used in the air conditioner indoor unit. Compared with the air conditioner volute tongue in the prior art, it can be seen that under the same conditions, the air conditioner volute tongue in this embodiment reduces the 1000HZ frequency howling sound. The mark "middle" in the figure indicates that the test point is in the middle position, and "1210" indicates that the speed is 1210rpm.
[0051] Embodiment 2
[0052] like Figure 6-Figure 8 As shown, the present invention provides an air conditioning volute.
[0053] The main difference between the second embodiment and the first embodiment is that there are restrictions on the extension length of the guide ribs on the windward surface and the depth of the guide ribs.
[0054] In this embodiment, at least one group of guide ribs 33 is disposed on the windward surface 31 , and the connecting lines of the ends of the guide ribs 33 in each group of guide ribs 33 on the windward surface 31 are in a sine-cosine distribution.
[0055] 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.
[0056] Here, a group of guide ribs 33 is a group of guide ribs 33 of a sine-cosine cycle. The guide ribs 33 are not limited to an integer group.
[0057] 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 is the x-axis. The distribution of the guide ribs 33 in each group satisfies:
[0058] Where 10≤A1≤15,
[0059] 10≤B1≤15.
[0060] 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.
[0061] 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.
[0062] 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.
[0063] Reference Figure 6 and Figure 7 As 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 wind guide surface 33 remains consistent.
[0064] Furthermore, 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 is in a changing state. The guide ribs 33 with a small gap from the crossflow fan can cut the airflow first, and the guide ribs 33 with a large gap from the crossflow fan 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.
[0065] In this embodiment, the maximum depth of the guide ribs 33 is y2, the extension direction of the volute tongue body is the x-axis, and the distribution of the guide ribs 33 in each group satisfies:
[0066] Where 1≤A2≤5, 1≤B2≤5.
[0067] 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.
[0068] 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 is the x-axis. The distribution of the guide ribs 33 in each group satisfies:
[0069] Where 10≤A1≤15,
[0070] 10≤B1≤15;
[0071] The distribution of each group of internal guide ribs 33 satisfies: ω1=ω2, and in the extension direction of the volute tongue body, the points corresponding to the maximum values of y1 and y2 are consistent. In practice, the points corresponding to the maximum values of y1 and y2 may not be provided with guide ribs 33. The key point 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.
[0072] Reference Figure 8 , the air conditioner volute tongue (sinusoidal cosine teeth) in this embodiment is used in the air conditioner indoor unit. Compared with the air conditioner volute tongue in the prior art, it can be seen that under the same conditions, the air conditioner volute tongue in this embodiment reduces the 1000HZ frequency howling sound. The mark "middle" in the figure indicates that the test point is in the middle position, and "1210" indicates that the speed is 1210rpm.
[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: In the length extension direction of the guide ribs (33) on the windward surface (31) and in the depth extension direction of the guide ribs (33) perpendicular to the windward surface (31), the guide ribs (33) on the windward surface (31) are both narrow at the top and wide at the bottom.
2. The air conditioning volute according to claim 1, characterized in that: 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.
3. The air conditioning volute as claimed in claim 2, characterized in that: 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: Where 10≤A1≤15, 10≤B1≤15。 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. The air conditioning volute as claimed in claim 1, characterized in that: On the contact surface between the guide ribs (33) and the windward surface (31), the shortest gap between the tops of adjacent guide ribs (33) is a, the shortest gap between the bottoms of adjacent guide ribs (33) is b, the width of the top of the guide ribs (33) is c, and the width of the bottom of the guide ribs (33) is d; Among them, 2mm≤a≤5mm, 1mm≤b≤4mm, 0mm≤c≤2mm, 1mm≤d≤3mm.
9. An air conditioner indoor unit, characterized in that: It comprises an air-conditioning volute as claimed in any one of claims 1 to 8, and further comprises a casing (2) and a cross-flow fan, wherein the side of the volute body (3) close to the cross-flow fan is a windward surface (31).
10. An air conditioner, characterized in that: It comprises the air conditioner indoor unit as claimed in claim 9.