Air conditioner volute tongue, air conditioner indoor unit and air conditioner
By setting guide ribs and sharp teeth structures that are narrow at the top and wide at the bottom on the air-conditioning volute tongue, the problem of poor noise reduction effect of the air-conditioning volute tongue is solved, and the effects of airflow stability and noise reduction are achieved.
Patent Information
- Application Number
- CN202422943823.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The existing air conditioner snail tongue structure has a small noise reduction effect and is prone to high-frequency whistling sounds.
A plurality of guide ribs are arranged on the snail tongue body. The guide ribs are parallel to the cross section of the snail tongue body, narrow at the top and wide at the bottom on the windward surface, and have an arc transition at the junction of the windward surface and the wind guide surface. The depth of the guide ribs gradually changes to form a pointed tooth structure.
Effectively cut and stabilize airflow, reduce airflow oscillation, reduce fan aerodynamic noise, improve airflow pressure pulsation, and reduce whistling sound.
Smart Images
Figure CN223412229U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air-conditioning products, 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 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 includes a volute body for being set in the indoor unit body and corresponding to the volute. In practice, the volute body includes a windward surface and a wind guide surface. The windward surface is the side of the volute body facing the cross-flow fan. The volute body is provided with guide ribs spaced along the length direction of the volute body. The guide ribs extend across the windward surface and the wind guide surface and are parallel to the cross section of the volute body. The guide ribs are rectangular 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 air conditioning and is prone to high-frequency whistling sounds. Utility Model Content
[0003] In order to overcome the technical problem that the existing volute structure inside the air conditioner has a relatively low noise reduction effect, the utility model provides an air conditioner volute, an air conditioner indoor unit and an air conditioner.
[0004] The technical solution adopted by the utility model to solve its technical problems is:
[0005] The air-conditioning volute tongue has a windward surface and a wind-guiding surface on its body. A plurality of guide ribs are arranged at intervals along the length direction of the volute tongue body, and 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. In the length extension direction of the guide ribs on the windward surface and in the depth extension direction of the guide ribs perpendicular to the windward surface, the guide ribs on the windward surface are narrow at the top and wide at the bottom.
[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 line of the ends of the guide ribs in each group on the windward surface is in a sine and cosine distribution.
[0008] In some embodiments, the extension length of the guide ribs on the windward side is y1, and the extension direction of the tongue body is the x-axis. 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 guide surface. At the junction of the windward surface and the wind guide surface, the guide rib has the largest depth. The depth of the guide rib gradually decreases in both directions extending toward the windward surface and the wind guide surface at the junction.
[0012] In some embodiments, a line connecting one end of the distal volute tongue body at the maximum depth corresponding to multiple guide ribs in each group of guide ribs is in a sine and cosine distribution.
[0013] In some embodiments, with the maximum depth of the guide ribs as y2 and the extension direction of the tongue body as the x-axis, the distribution of the guide ribs in each group satisfies:
[0014] Where 1≤A2≤5, 1≤B2≤5.
[0015] Furthermore, with the extension length of the guide rib on the windward side as y1 and the extension direction of the volute tongue as 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 utility model also provides an air-conditioning indoor unit, comprising the air-conditioning volute in any one 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 the windward side.
[0022] The utility model also provides an air conditioner, comprising the above-mentioned air conditioner indoor unit.
[0023] The beneficial effects of the utility model are:
[0024] 1. When the fan is running at high speed, since the guide ribs adopt the aforementioned narrow-upper-wide-lower shape, the tines-like guide ribs 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 tines 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 on the windward side of the volute tongue body are conducive to integrating the return air flow; the connecting line of the guide ribs at the end of the windward side 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 howling. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural diagram of the snail tongue body in the prior art;
[0028] Figure 2 for Figure 1 A partial enlarged view of
[0029] Figure 3 This is a schematic structural diagram of the snail tongue body in Example 1 provided by the present utility model;
[0030] Figure 4 for Figure 3 A partial enlarged view of
[0031] Figure 5 A comparison chart of the air duct noise spectrum analysis of the snail tongue body in Example 1 and the snail tongue body in the prior art;
[0032] Figure 6 This is a schematic structural diagram of the snail tongue body in the second embodiment of the present invention;
[0033] Figure 7 for Figure 6 A partial enlarged view of
[0034] Figure 8 This is a comparison chart of the air duct noise spectrum analysis 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 will be further described below with reference to the accompanying drawings.
[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to 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 intended to limit the present invention.
[0038] Example 1
[0039] like Figure 3-Figure 5 As shown, the utility model provides an air-conditioning volute tongue.
[0040] The air conditioning volute is used in 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 conditioning 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, and 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 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 body 3 that faces the cross-flow fan when used in an air conditioner indoor unit; the wind-guiding surface 32 is the side of the volute body 3 that faces away from the cross-flow fan. A curved arc transition forms between the windward and wind-guiding surfaces 31 and 32, with a radius of 0 mm to 7 mm. In this embodiment, the guide ribs 33 also form a curved transition at the junction of the windward and wind-guiding surfaces 31 and 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 both parallel to the cross section of the volute tongue body 3. Similarly, the guide rib 33 at the intersection of 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 saw tooth, 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 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 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 the extension length of the guide ribs 33 on the windward surface 31 as y1, and the maximum depth of the guide ribs 33 as y2. In this embodiment, y1 and y2 are both fixed values. It is manifested in that the end heights of each guide rib 33 on the windward surface 31 remain consistent, and the line connecting the maximum depths of each guide rib 33 at the junction of the windward surface 31 and the wind-guiding surface 33 is a straight line. In some other embodiments, y1 and y2 vary, 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 direction of the extended length on the windward surface 31 and the outer diameter of the fan is controlled to be 5 mm-8 mm.
[0050] Reference Figure 5 The air conditioner volute tongue (pure tines) of this embodiment is used in an air conditioner indoor unit. Compared to conventional air conditioner volute tongues, under the same conditions, this embodiment reduces the 1000 Hz frequency whine. The "center" mark in the figure indicates the test point is in the middle, and "1210" indicates a rotational speed of 1210 rpm.
[0051] Example 2
[0052] like Figure 6-Figure 8 As shown, the utility model provides an air-conditioning volute tongue.
[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 provided on the windward surface 31 , and the connecting line of the ends of the guide ribs 33 in each group of guide ribs 33 on the windward surface 31 is in a sine and 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 the integration of the return air flow; the end connection line of the guide ribs 33 on the windward surface 31 of the volute tongue body 3 shows a sine and cosine variation, 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 number of guide ribs 33 is not limited to an integer number.
[0057] In this embodiment, the extension length of the guide ribs 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. 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. As an option, A1≤B1 can also be selected during the design.
[0061] Although only the aforementioned sine formula is mentioned here, based on the convertibility of sine waves and cosine waves, it is generally said that the end 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 guide surface 32. At the junction of the windward surface 31 and the wind guide surface 32, the depth of the guide rib 33 is the largest. At the junction, the depth of the guide rib 33 gradually decreases in both directions extending toward the windward surface 31 and toward the wind guide surface 32.
[0063] Reference Figure 6 and Figure 7 As shown, the extension length of the guide ribs 33 on the windward surface 31 is constantly changing, specifically following the aforementioned sine and cosine formulas. However, the extension length on the windward surface 32 remains consistent. In other words, the ends of the guide ribs 33 on the windward surface 32 are flush and aligned, ensuring consistent gas flow from the various guide grooves on the windward surface 33.
[0064] Furthermore, in this embodiment, the lines connecting the points of maximum depth corresponding to the multiple guide ribs 33 in each group of guide ribs 33 on the end distal to the tongue body 3 are arranged in a sine and cosine distribution. This allows the depth of the guide ribs 33 to vary in the axial direction, and the gap between the tongue body 3 and the cross-flow fan to change. Guide ribs 33 with a smaller gap from the cross-flow fan can cut the airflow first, while guide ribs 33 with a larger gap from the cross-flow fan can cut the return airflow later. This prevents the tongue body 3 from cutting the airflow simultaneously, reduces the intensity of the cut airflow, and helps to reduce whistling.
[0065] In this embodiment, the maximum depth of the guide ribs 33 is y2, and the extension direction of the volute tongue body is the x-axis. 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. In this case, the curve segment with a positive y2 value should be used as a reference for the maximum depth of the guide rib 33. As an option, A2≤B2 can also be selected during the design.
[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 set of internal guide ribs 33 satisfies the following equation: ω1 = ω2, and the points corresponding to the maximum values of y1 and y2 coincide with each other along the extension direction of the volute tongue body. In practice, guide ribs 33 may not be located at the points corresponding to the maximum values of y1 and y2. The key point here is that the extension length of each set of internal guide ribs 33 on the windward surface 31 and the periodic variation of the maximum depth of the guide ribs 33 are consistent, and the peaks occur on the same guide rib 33. This not only improves the noise reduction effect, but also facilitates processing.
[0072] Reference Figure 8 The air conditioning volute tongue (sin-cosine tines) of this embodiment is used in an air conditioning indoor unit. Compared to conventional air conditioning volute tongues, under the same conditions, this embodiment reduces the 1000 Hz frequency whine. The "center" mark in the figure indicates the test point is in the middle, and "1210" indicates a rotational speed of 1210 rpm.
[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 replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. An air conditioning volute, wherein 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 along the length direction of the volute body (3), a guide groove is formed between adjacent guide ribs (33), and the cross sections of the guide ribs (33) and the volute 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 conditioner 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 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.
3. The air conditioner volute according to claim 2, 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。 4. The air conditioner 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 guide surface (32). The depth of the guide rib (33) is the greatest at the junction of the windward surface (31) and the wind guide surface (32). The depth of the guide rib (33) gradually decreases in both directions of extending toward the windward surface (31) and toward the wind guide surface (32) at the junction.
5. The air conditioner volute according to claim 4, characterized in that: The connecting line of one end of the distal volute tongue body (3) at the maximum depth corresponding to the plurality of guide ribs (33) in each group of guide ribs (33) is in a sine and cosine distribution.
6. The air conditioning volute according to 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 conditioner volute according to 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 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 conditioner volute according to claim 1, wherein: 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: The air-conditioning volute comprises the air-conditioning volute according to 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-conditioning indoor unit as claimed in claim 9.