A shunt structure and an air outlet of a range hood

Abstract

The utility model discloses a shunt structure and range hood air outlet, shunt structure includes connecting rod and a plurality of shunt plate fin, the shunt plate fin is around the connecting rod and is arranged in rotation, is used for guiding airflow to form rotating airflow, forms the wind -catching area between adjacent shunt plate fin, be equipped with the through -flow hole on the shunt plate fin, is used for balancing the air pressure of adjacent wind -catching area. Compared with prior art, the utility model discloses a shunt plate fin is set up, and the oil fume airflow that is caught is efficiently organized as directional rotating flow, effectively suppresses the generation of turbulent flow and vortex, reduces the noise caused by airflow disordered impact. Meanwhile, the through -flow hole set up on the shunt plate fin can balance the air pressure difference between different wind -catching area, effectively removes the impact energy that the air pressure concentration causes to the structure surface, further weakens the generation of vibration and noise. Its application on the range hood air outlet, significantly improves the mute effect of whole machine, improves the user's use experience.

Description

Technical Field

[0001] This utility model relates to the field of range hoods, and in particular to a diversion structure and a range hood air outlet. Background Technology

[0002] Noise control remains a critical issue in the current technology of household range hoods. Existing noise reduction methods mainly focus on components such as the blower, air box, air inlet grille, and internal air duct. While these measures can suppress local noise to some extent, the noise problem of the air outlet, as an exposed structure, has long been neglected. Because the two ends of the air outlet need to connect to the circular ventilation pipe and the square body respectively, a square-to-circle transition structure is usually adopted. This results in abrupt changes in the airflow channel shape and a significant increase in flow resistance at the diameter change points, which in turn causes turbulent flow of flue gas, instability of the flow field, and generates significant aerodynamic noise, ultimately affecting the user experience.

[0003] Based on the above, the existing noise reduction structure for air outlets needs further improvement. Utility Model Content

[0004] The first objective of this invention is to overcome the shortcomings of the prior art and provide a flow-dividing structure that guides the airflow into a rotating airflow through the flow-dividing plate fins, avoiding the formation of turbulent airflow. At the same time, the air pressure between the wind-catching areas is balanced through the flow holes, thus relieving the noise generated by the air pressure impacting the flow-dividing plate fins and achieving better noise reduction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flow-diverting structure, including a connecting rod and several flow-diverting plate fins, wherein the flow-diverting plate fins are arranged in a rotating manner around the connecting rod to guide airflow to form a rotating airflow, and a wind-catching area is formed between adjacent flow-diverting plate fins. The flow-diverting plate fins are provided with flow holes to balance the air pressure of adjacent wind-catching areas.

[0006] Compared with existing technologies, this invention, by incorporating diverter fins, efficiently organizes the captured oil fume airflow into a directional rotating flow, effectively suppressing the generation of turbulence and eddies, and reducing noise caused by disordered airflow impact. Simultaneously, the flow holes on the diverter fins balance the air pressure differences between different air-capturing areas, effectively dissipating the impact energy caused by concentrated air pressure on the structural surface, further reducing vibration and noise generation. These synergistic effects significantly improve the overall quietness of the unit and enhance the user experience.

[0007] Preferably, the flow divider fin includes an upper edge trajectory line, a side edge trajectory line, and a lower edge trajectory line. The side edge trajectory line connects the upper edge trajectory line and the lower edge trajectory line. The upper edge trajectory line, the side edge trajectory line, and the lower edge trajectory line are connected end to end to form the flow divider fin.

[0008] Preferably, the upper edge trajectory of the diverter fin includes two guide sections and a connecting section. The connecting section is located between the two guide sections. The radius of curvature R of the connecting section satisfies 15mm≤R≤25mm, and the radius of curvature of the guide section satisfies 995mm≤R≤1005mm. The radius of curvature of the guide section and the connecting section differs significantly. The guide section is relatively gentle, while the connecting section has a larger turning radius. This allows the flue gas to be rapidly turned in the horizontal direction by impacting the connecting section at high speed from the accelerated state of the guide section. This ensures that the flue gas still has a certain initial velocity after turning and enters the second guide section for acceleration, thereby forming a rotating airflow with a certain horizontal velocity.

[0009] Preferably, the included angle α between the projections of the upper and lower trajectory lines is 40°-60°; wherein, the preferred angle of included angle α is 45°, so that the flue gas forms a rotating airflow, reduces the formation of turbulent airflow, and reduces the noise generated from the air outlet seat.

[0010] Preferably, the side trajectory line includes a first transition segment and a second transition segment. The first transition segment is connected to the upper trajectory line, and the second transition segment is connected to the lower trajectory line. The included angle between the first transition segment and the second transition segment is 110-125°, and the length of the first transition segment is 2-3 times that of the second transition segment.

[0011] Another objective of this invention is to provide an air outlet for a range hood, comprising an air outlet base, a sound insulation component, and a flow diversion structure as described above. The air outlet base is a hollow structure with several noise reduction holes. The sound insulation component covers the outside of the air outlet base, and the flow diversion structure is disposed inside the air outlet base. Compared with the prior art, the air outlet of this invention significantly improves the overall noise reduction effect of the range hood and enhances the user experience due to the application of the above-mentioned solution.

[0012] Preferably, the sound insulation component includes sound insulation cotton and a sheath, the sound insulation cotton covers the noise reduction hole, and the sheath is disposed on the outside of the sound insulation cotton; noise generated in the air outlet seat is transmitted to the sound insulation cotton through the noise reduction hole for absorption, thus preventing noise leakage.

[0013] Preferably, the air outlet seat has a positioning structure on its inner side, and the diverter fins are engaged with the positioning structure.

[0014] Preferably, the positioning structure includes spaced positioning blocks and positioning grooves formed between the positioning blocks, and the diverter fins are engaged in the positioning grooves, making the diverter structure easy to assemble and disassemble, and allowing it to be manufactured separately from the air outlet seat, resulting in higher production efficiency.

[0015] Preferably, the outer side of the air outlet seat is provided with an extension portion, which together with the outer wall of the air outlet seat forms a mounting groove, which is used to connect to the ventilation pipe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the diversion structure.

[0017] Figure 2 This is a top view of the split-flow structure.

[0018] Figure 3 This is a top view of the diffuser fins.

[0019] Figure 4 This is a schematic diagram of the air outlet structure of a range hood. Figure 1 .

[0020] Figure 5 This is a schematic diagram of the air outlet structure of a range hood. Figure 2 .

[0021] Figure 6 This is an exploded view of the air outlet of a range hood.

[0022] Figure 7 This is a structural diagram of the air outlet base and positioning structure.

[0023] Figure 8 This is a cross-sectional view of the air vent base.

[0024] Label Explanation:

[0025] Connecting rod 1, diverter fins 2, upper edge trajectory line 21, guide section 211, connecting section 212, side edge trajectory line 22, first transition section 221, second transition section 222, lower edge trajectory line 23, flow hole 24, wind-catching area 3, range hood outlet 4, diverter structure 5, outlet seat 6, noise reduction hole 61, positioning structure 62, positioning block 621, positioning groove 622, extension 63, upper frame 64, lower frame 65, mounting hole 651, reinforcing rod 66, mounting groove 67, sound insulation component 7, sound insulation cotton 71, sheath 72, mounting part 721, through hole 7211. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "horizontal", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description, and does 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. Therefore, it should not be construed as a limitation of this utility model.

[0027] Example 1:

[0028] See Figures 1 to 3This embodiment discloses a flow-diverting structure 5, including a connecting rod 1 and several flow-diverting plate fins 2. The flow-diverting plate fins 2 are arranged in a rotating manner around the connecting rod 1 to guide the airflow to form a rotating airflow. A wind-catching area 3 is formed between adjacent flow-diverting plate fins 2. The flow-diverting plate fins 2 are provided with flow holes 24 to balance the air pressure of adjacent wind-catching areas 3.

[0029] The diverter fin 2 includes an upper edge trajectory line 21, a side edge trajectory line 22, and a lower edge trajectory line 23. The side edge trajectory line 22 connects the upper edge trajectory line 21 and the lower edge trajectory line 23. The upper edge trajectory line 21, the side edge trajectory line 22, and the lower edge trajectory line 23 are connected end to end to form the diverter fin 2.

[0030] The upper edge trajectory line 21 of the flow divider fin 2 includes two flow guide sections 211 and a connecting section 212. The connecting section 212 is disposed between the two flow guide sections 211. The radius of curvature R of the connecting section 212 satisfies 15mm≤R≤25mm, and the radius of curvature of the flow guide section 211 satisfies 995mm≤R≤1005mm. The radius of curvature of the connecting section 212 in this design is set to be much smaller than that of the guide section 211, and the connecting section 212 is located between the guide sections 211. When the flue gas flows through the first guide section 211, the curvature radius is large and the curvature is gentle, so the airflow gradually accelerates. When it enters the connecting section 212 from the guide section 211, the curvature radius is very small, which is equivalent to a sharp turn. The airflow hits the connecting section 212 at high speed, thus achieving a high-speed turn and the flow speed is slightly reduced. After entering the second guide section 211, the airflow continues to accelerate and rotates and forms a uniform high-speed rotating airflow outside the lower trajectory line 23 and other airflows in the wind-catching area 3, thereby reducing the formation of turbulent airflow and thus reducing the noise generated by turbulent airflow hitting the range hood outlet seat 6.

[0031] The included angle α between the projections of the upper trajectory line 21 and the lower trajectory line 23 is 40°-60°.

[0032] The included angle α is 45°. The angle range of the wind-catching area 3 in this scheme is 90°. The β angle formed between the upper trajectory line 21 and the lower trajectory line 23 is used to guide the rotation of the flue gas in the vertical direction. Since the flue gas also flows along the direction from the upper trajectory line 21 to the lower trajectory line 23 during the rotation along the α angle, if the angle is set too small, the resulting guiding path will be too gentle, and the airflow rotation direction will be insufficient, making it difficult to form a rotating airflow. If the angle is set too large, the path required for rotation will be too long, and the airflow speed will gradually decrease. In addition, due to the wind resistance factor, the fumes are easy to accumulate on the diverter fins 2, affecting the flow guiding efficiency of the diverter fins 2. At the same time, the airflow speed is too small when it reaches the lower trajectory line 23, resulting in poor stability of the rotating airflow. Therefore, 45° is the optimal angle, and the α angle is not limited to a single angle.

[0033] The side trajectory line 22 includes a first transition segment 221 and a second transition segment 222. The first transition segment 221 is connected to the upper trajectory line 21, and the second transition segment 222 is connected to the lower trajectory line 23. The included angle between the first transition segment 221 and the second transition segment 222 is 110-125°, and the length of the first transition segment 221 is 2-3 times that of the second transition segment 222.

[0034] Compared with existing technologies, this invention, by setting up a flow divider fin 2, efficiently organizes the captured oil fume airflow into a directional rotating flow, effectively suppressing the generation of turbulence and eddies, and reducing noise caused by disordered airflow impact. Simultaneously, the flow holes on the flow divider fin 2 can balance the air pressure differences between different air-capturing zones 3, effectively dissipating the impact energy caused by concentrated air pressure on the structural surface, further weakening vibration and noise generation. These synergistic effects significantly improve the overall quietness of the machine and enhance the user experience.

[0035] Example 2:

[0036] See Figures 4 to 8 This embodiment discloses a range hood air outlet 4, including an air outlet seat 6, a sound insulation component 7, and a diversion structure 5 of Embodiment 1. The air outlet seat 6 is a hollow structure with a plurality of noise reduction holes 61. The sound insulation component 7 covers the outside of the air outlet seat 6, and the diversion structure 5 is disposed inside the air outlet seat 6.

[0037] The sound insulation component 7 includes sound insulation cotton 71 and a sheath 72. The sound insulation cotton 71 covers the noise reduction hole 61, and the sheath 72 is disposed on the outside of the sound insulation cotton 71. In this solution, the sound insulation cotton 71 can directly absorb noise transmitted through the noise reduction hole 61, with good absorption effect and simple structure. The sheath 72 is used to fix the sound insulation cotton 71, so that the sound insulation cotton 71 tightly covers the noise reduction hole 61 and prevents noise leakage.

[0038] Specifically, the sound insulation cotton 71 is made of rubber-plastic cotton. The rubber-plastic cotton used in the sound insulation cotton 71 of this solution is an elastic closed-cell foam material with good elasticity and absorption, and high noise absorption efficiency.

[0039] To ensure a stable connection between the sheaths 72, each sheath 72 has a mounting portion 721 extending outward from its edge at both ends. The mounting portion 721 has a through hole 7211, and the mounting portions 7211 of adjacent sheaths 72 are correspondingly provided and connected by screws.

[0040] To fix the diversion structure 5 inside the air outlet seat 4, a positioning structure 62 is provided on the inner side of the air outlet seat 6, and the diversion plate fins 2 are engaged on the positioning structure 62.

[0041] The positioning structure 62 includes spaced positioning blocks 621 and a positioning groove 622 formed between the positioning blocks 621, and the diverter fins 2 are engaged in the positioning groove 622. The positioning structure 62 of this design allows the diverter structure 5 to be quickly disassembled and reassembled with the air outlet seat 6, facilitating cleaning and maintenance.

[0042] An extension 63 is provided on the outer side of the air outlet seat 6. The extension 63 and the outer wall of the air outlet seat 6 form an installation groove 67, which is used to connect to the ventilation pipe.

[0043] The air outlet base 6 includes a circular upper frame 64 and a square lower frame 65. The extension 63 is provided on the upper frame 64, and the lower frame 65 is provided with a mounting hole 651 for connecting to the range hood.

[0044] The air outlet seat 6 is provided with a reinforcing rod 66, and the two ends of the reinforcing rod 66 are respectively arranged on the inner wall of the air outlet seat 6.

[0045] Compared with the prior art, the exhaust vent 4 of the range hood of this utility model significantly improves the overall noise reduction effect and enhances the user experience due to the application of the above-mentioned solution.

[0046] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A current splitting structure, characterized in that, It includes a connecting rod (1) and several diverter fins (2). The diverter fins (2) are arranged in a rotating manner around the connecting rod (1) to guide the airflow to form a rotating airflow. A wind-catching area (3) is formed between adjacent diverter fins (2). The diverter fins (2) are provided with flow holes (24) to balance the air pressure of adjacent wind-catching areas (3).

2. The shunt structure according to claim 1, characterized in that, The flow divider fin (2) includes an upper edge trajectory line (21), a side edge trajectory line (22) and a lower edge trajectory line (23). The side edge trajectory line (22) connects the upper edge trajectory line (21) and the lower edge trajectory line (23). The upper edge trajectory line (21), the side edge trajectory line (22) and the lower edge trajectory line (23) are connected end to end to form the flow divider fin (2).

3. The flow splitting structure according to claim 2, characterized in that, The upper edge trajectory line (21) of the flow divider fin (2) includes two flow guide sections (211) and a connecting section (212). The connecting section (212) is disposed between the two flow guide sections (211). The radius of curvature R of the connecting section (212) satisfies 15mm≤R≤25mm, and the radius of curvature of the flow guide section (211) satisfies 995mm≤R≤1005mm.

4. The flow splitting structure according to claim 2, characterized in that, The included angle α between the projections of the upper trajectory line (21) and the lower trajectory line (23) is 40°-60°.

5. The shunt structure according to claim 4, characterized in that, The side trajectory line (22) includes a first transition segment (221) and a second transition segment (222). The first transition segment (221) is connected to the upper trajectory line (21), and the second transition segment (222) is connected to the lower trajectory line (23). The included angle between the first transition segment (221) and the second transition segment (222) is 110-125°. The length of the first transition segment (221) is 2-3 times that of the second transition segment (222).

6. A range hood air outlet (4), comprising an air outlet seat (6), a sound insulation component (7), and a flow diversion structure, wherein the air outlet seat (6) is a hollow structure with a plurality of noise reduction holes (61) thereon, the sound insulation component (7) covers the outside of the air outlet seat (6), and the flow diversion structure is disposed inside the air outlet seat (6), characterized in that, The shunt structure is the shunt structure described in any one of claims 1-5.

7. The range hood exhaust vent according to claim 6, characterized in that, The sound insulation component (7) includes sound insulation cotton (71) and a sheath (72), the sound insulation cotton (71) covering the noise reduction hole (61) and the sheath (72) being disposed on the outside of the sound insulation cotton (71).

8. The range hood exhaust vent according to claim 6, characterized in that, The air outlet seat (6) is provided with a positioning structure (62) on its inner side, and the diverter fins (2) are engaged on the positioning structure (62).

9. The range hood exhaust vent according to claim 8, characterized in that, The positioning structure (62) includes positioning blocks (621) spaced apart and positioning grooves (622) formed between the positioning blocks (621), and the diverter fins (2) are engaged in the positioning grooves (622).

10. The air outlet according to claim 6, characterized in that, The air outlet seat (6) has an extension (63) on its outer side. The extension (63) and the outer wall of the air outlet seat (6) form an installation groove (67). The installation groove (67) is used to connect to the ventilation pipe.

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