Wind gathering tuyere

Abstract

A wind gathering tuyere comprises a shell, a baffle is arranged on a wind outlet face, a plurality of wind outlets with the same area are formed between the baffle and the shell, and the wind outlets are arranged around the baffle in the axis direction of a wind inlet face; the air guide part comprises a middle partition plate dividing the cavity into a left main air channel and a right main air channel, a plurality of flow deflectors are arranged on the two sides of the middle partition plate and divide the main air channels into a plurality of branch air channels, and each branch air channel corresponds to one air inlet. The sectional area of the air inlet communicated with the lower end air outlet and the middle end air outlet is larger than that of the air inlet communicated with the upper end air outlet, and the deflection angle of the flow deflectors arranged in the axis direction of the air inlet face is gradually increased from top to bottom, so that the air outlet amount of each air outlet is uniform. Through the positions and the areas of the air outlets and by adjusting the sectional areas of the air inlets, the flowing speed of fluid entering each air channel is equal, and by changing the deflection angles of the flow deflectors, the air outlet amount of each air outlet is uniform.

Description

Technical Field

[0001] This utility model relates to the field of hair dryer technology, specifically to a concentrating nozzle. Background Technology

[0002] Hair dryers typically have a concentrator nozzle at the air outlet to enhance airflow. Conventional hair dryers are T-shaped or 7-shaped, meaning the air inlet and outlet surfaces of the concentrator nozzle are aligned on the same axis. However, some newer stick-shaped hair dryers use concentrator nozzles with the air inlet and outlet axes at a 90° angle for smoother operation. In practice, with this type of concentrator nozzle, the airflow decreases from top to bottom, with the weakest airflow at the bottom, resulting in a less than ideal user experience. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a concentrating air nozzle.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A concentrating nozzle, comprising:

[0006] The housing has a cavity inside, an air inlet surface at one end, and an air outlet surface on its side. The air inlet surface and the air outlet surface are connected. The axis of the air inlet surface is perpendicular to the axis of the air outlet surface. The air outlet surface is provided with a baffle. There are several air outlets of equal area between the baffle and the housing. The air outlets are arranged around the baffle. The air outlets are divided from top to bottom into an upper air outlet, a middle air outlet, and a lower air outlet along the axis of the air inlet surface.

[0007] An air guide component, placed within the chamber, includes a central partition that divides the chamber into two main air ducts, left and right. Several guide vanes are provided on both sides of the central partition, which divide the main air ducts into multiple branch air ducts. Each branch air duct corresponds to an air inlet. The cross-sectional area of ​​the air inlet connected to the lower and middle air outlets is larger than the cross-sectional area of ​​the air inlet connected to the upper air outlet. The deflection angle of the guide vanes arranged along the axial direction of the air inlet surface gradually increases from top to bottom, thereby making the air volume of each air outlet uniform.

[0008] There are 10 air outlets distributed around the baffle. The uppermost air outlet is the upper air outlet, the two middle air outlets are the middle air outlets, and the two lower air outlets are the lower air outlets. Each side has 3 guide vanes, which divide the air inlet surface of the corresponding side into 3 air inlets. Each air inlet is connected to the upper air outlet, the middle air outlet and the lower air outlet.

[0009] The guide vane includes a front section for dividing the air inlet surface, a transition section, and a rear section for separating the air outlet, wherein the radius of curvature of the transition section satisfies the minimum energy loss for a 90° airflow turn.

[0010] The transition between the transition section and the subsequent section is smooth.

[0011] The housing includes an inner shell and an outer shell, and a first air gap is formed between the inner shell and the outer shell.

[0012] The inner shell has an opening at the top and a step in the circumference. The air guide is inserted into the inner shell 200 and has an edge on the step in the circumference at its top.

[0013] A second air gap is provided between the upper end of the air guide and the outer shell.

[0014] A third air gap is provided between the lower end of the air guide and the inner shell.

[0015] The beneficial effects of this utility model are as follows: By using an equal-area air outlet design, the internal air passage is divided into several independent air passages through the air guide, and each air passage is connected to a different number of air outlets. Each air passage is provided with an air inlet. By adjusting the position and area of ​​the air outlet and the cross-sectional area of ​​the air inlet, the inflow velocity of the fluid in each air passage is made equal. By changing the deflection angle of the guide vane, it can simultaneously undertake the functions of diversion, turning (90°) and resistance balancing, thereby making the air volume at each air outlet uniform. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention, wherein Z1 represents the axis of the air outlet surface and the air outlet direction, and Z2 represents the axis of the air inlet surface and the air inlet direction.

[0017] Figure 2 This is a front view of the air outlet surface of this utility model.

[0018] Figure 3 This is a front view of the air inlet surface of this utility model.

[0019] Figure 4 for Figure 3 Schematic diagram of the cross section at point AA.

[0020] Figure 5 This is a schematic diagram of the air guide component of this utility model.

[0021] Figure 6 This is a side view of the air guide component of this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] like Figure 1 As shown, a concentrating air nozzle has an air inlet surface 20 and an air outlet surface 30. The axial direction of the air inlet surface is shown as the dashed line Z2, and the axial direction of the air outlet surface 30 is shown as the dashed line Z1. The dashed line Z1 is perpendicular to the dashed line Z2, indicating that the air inlet surface 20 is set perpendicular to the air outlet surface 30, that is, the concentrating air nozzle needs to turn the air 90°.

[0025] The concentrator nozzle consists of a housing and an air guide component housed within the housing. The air guide component simultaneously performs functions of air diversion, 90° deflection, and resistance balancing. The housing has a latch at the air inlet for detachable connection to the blower body. In some other embodiments, a plug-in connection can also be used. In some cases, the concentrator nozzle can be directly fixed to the blower body, forming a non-detachable unit.

[0026] The housing 10 has a cavity inside, with an air inlet surface 20 at one end and an air outlet surface 30 on its side. The air inlet surface 20 and the air outlet surface 30 are connected, and the axis of the air inlet surface 20 is perpendicular to the axis of the air outlet surface 30. Figure 2 As shown, the air outlet surface 30 is provided with a baffle 40, and a plurality of air outlets 50 of equal area are provided between the baffle 40 and the housing 10. The air outlets 50 are arranged around the baffle 40. The baffle 40 is connected to the housing by a plurality of connecting ribs, which divide the annular groove into a plurality of air outlets 50 of equal area. Figure 3 As shown, the air outlet 50 is divided into an upper air outlet, a middle air outlet 1000 and a lower air outlet 2000 from top to bottom along the direction of the air inlet axis. The internal air guide is set according to the air outlets of different heights.

[0027] An air guide 300 is placed inside the cavity. It includes a middle partition 310 that divides the cavity into two main air passages, left and right. The middle partition has a vertical connecting rib to ensure that the equivalent air outlet area is not lost. Several guide vanes 320 are provided on both sides of the middle partition 310. The guide vanes 320 divide the main air passage into multiple branch air passages 3000, and each branch air passage 3000 corresponds to an air inlet 60. The cross-sectional area of ​​the air inlet 60 that communicates with the lower air outlet 2000 and the middle air outlet 1000 is larger than the cross-sectional area of ​​the air inlet 60 that communicates with the upper air outlet. The deflection angle of the guide vanes 320 arranged along the air inlet surface axis gradually increases from top to bottom, thereby guiding more airflow to the lower air outlet. The deflection angle of the upper guide vanes is smaller, which can avoid overloading the airflow at the upper air outlet, thus making the airflow at each air outlet uniform.

[0028] Meanwhile, the end of the air guide opposite the air outlet has a transition surface, which allows the air to be discharged directly from the air outlet along the transition surface, reducing wind resistance.

[0029] There are 10 air outlets 50, distributed circumferentially along the baffle 40. The uppermost air outlet 50 is the upper air outlet, the two middle air outlets 50 are the middle air outlets 1000, and the two lower air outlets 50 are the lower air outlets 2000. The guide vanes correspond to the connecting ribs on the corresponding air outlet sides, so as not to lose the equivalent air outlet area. There are 3 guide vanes 320 on each side, which divide the air inlet surface of the corresponding side into 3 air inlets 60. Each air inlet 60 is connected to the upper air outlet, the middle air outlet 1000 and the lower air outlet 2000 respectively. The cross-sectional area of ​​the air inlet connected to the upper air outlet is about half of the air inlet connected to the middle air outlet 1000 and the lower air outlet. The cross-sectional areas of the air inlet connected to the middle air outlet and the air inlet connected to the lower air outlet are approximately equal.

[0030] Meanwhile, since the upper air outlet is a single outlet, while the middle and lower air outlets each have two outlets, the cross-sectional area of ​​the outlet connected to the upper air outlet needs to be reduced to increase local resistance; while the two lower air outlets have long inlet paths, so the cross-sectional area needs to be increased to reduce frictional resistance.

[0031] The air duct will be divided into three layers: upper, middle, and lower, corresponding to different air outlet groups:

[0032] Upper air guide vane: guides airflow to the topmost air outlet.

[0033] Middle layer air guide vanes: guide airflow to the two middle air outlets.

[0034] Lower air guide vanes: guide airflow to the two lowest air outlets.

[0035] The lower guide vane has the largest angle: it forces the airflow to turn downwards, compensating for the problems of long path and high resistance.

[0036] The angle of the middle layer guide vanes is secondary: balancing steering and drag.

[0037] The upper air guide vane has the smallest angle: reducing excessive airflow to the near-end air outlet.

[0038] Quantitative relationship between angle and resistance

[0039] Local drag coefficient: The deflection angle θ of the guide vane affects the local loss coefficient K (empirical formula: K∝sin 2 θ).

[0040] If the angle of the lower guide vane is 45°, then K≈1.0;

[0041] The angle of the upper guide vane is 15°, and K≈0.17.

[0042] Resistance balance formula: By adjusting the angle of the guide vanes, the total resistance along each path is made equal.

[0043] ΔP=f*(L / D)*(ρv 2 / 2)+K*(ρv 2 / 2) = constant

[0044] Remote (below) path length (L) 下 >L 上 This needs to be compensated by increasing the angle of the guide vanes (increasing K).

[0045] like Figure 5 and Figure 6 As shown, the guide vane 320 includes a front section 321 for dividing the air inlet surface, a transition section 322 and a rear section 323 for separating the air outlet. The radius of curvature of the transition section 322 satisfies the minimum energy loss for the airflow to turn 90°, according to the empirical formula: R≥2D, where D is the hydraulic diameter of the flow channel and R is the radius of curvature.

[0046] The transition section 322 and the subsequent section 323 are smoothly connected to avoid airflow separation.

[0047] like Figure 4 As shown, the housing 10 includes an inner shell 200 and an outer shell 100, and a first air gap 400 is formed between the inner shell 200 and the outer shell 100.

[0048] The inner shell and outer shell are fixed together by a snap-fit ​​mechanism, and an air gap is formed between them to prevent heat from the inside of the nozzle from being transferred to the outer shell, making it easy for the user to remove the nozzle directly.

[0049] The inner shell 200 has an opening at the top and a step in the circumference. The air guide 300 is inserted into the inner shell 200 and has an edge on the step in the circumference at its upper end. The inner shell supports the air guide to ensure the accuracy of the air guide's installation position in the shell. The air guide is fixed by the cooperation between the outer shell and the inner shell.

[0050] A second air gap 500 is provided between the upper end of the air guide 300 and the outer shell 100, and a third air gap 600 is provided between the lower end of the air guide 300 and the inner shell 200. Through the protection of the first air gap, the second air gap and the third air gap in various directions, an insulation layer is added to ensure that the user will not be burned at any position when holding the air nozzle.

[0051] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A concentrating air nozzle, characterized in that: It includes: The housing (10) has a chamber inside, an air inlet surface (20) at one end, and an air outlet surface (30) on its side. The air inlet surface (20) and the air outlet surface (30) are connected. The axis of the air inlet surface (20) is perpendicular to the axis of the air outlet surface (30). The air outlet surface (30) is provided with a baffle (40). There are several air outlets (50) of equal area between the baffle (40) and the housing (10). The air outlets (50) are arranged around the baffle (40). The air outlets (50) are divided from top to bottom into an upper air outlet, a middle air outlet (1000) and a lower air outlet (2000) along the axis of the air inlet surface. An air guide (300) is placed in the chamber and includes a middle partition (310) that divides the chamber into two main air passages, left and right. Several guide vanes (320) are provided on both sides of the middle partition (310). The guide vanes (320) divide the main air passage into multiple branch air passages (3000), and each branch air passage (3000) corresponds to an air inlet (60). The cross-sectional area of ​​the air inlet (60) that is connected to the lower air outlet (2000) and the middle air outlet (1000) is larger than the cross-sectional area of ​​the air inlet (60) that is connected to the upper air outlet. The deflection angle of the guide vanes (320) arranged along the air inlet surface axis gradually increases from top to bottom, thereby making the air volume of each air outlet uniform.

2. The air-concentrating nozzle according to claim 1, characterized in that: There are 10 air outlets (50) distributed around the baffle (40). The uppermost air outlet (50) is the upper air outlet, the two middle air outlets (50) are the middle air outlets (1000), and the two lower air outlets (50) are the lower air outlets (2000). There are 3 guide vanes (320) on each side, which divide the air inlet surface of the corresponding side into 3 air inlets (60). Each air inlet (60) is connected to the upper air outlet, the middle air outlet (1000) and the lower air outlet (2000).

3. The air-concentrating nozzle according to claim 1, characterized in that: The guide vane (320) includes a front section (321) for dividing the air inlet surface, a transition section (322) and a rear section (323) for separating the air outlet, wherein the radius of curvature of the transition section (322) satisfies the minimum energy loss for the airflow to turn 90°.

4. The air-concentrating nozzle according to claim 3, characterized in that: The transition section (322) and the subsequent section (323) are smoothly transitioned.

5. A concentrating air nozzle according to any one of claims 1 to 4, characterized in that: The housing (10) includes an inner shell (200) and an outer shell (100), and a first air gap (400) is formed between the inner shell (200) and the outer shell (100).

6. The air-concentrating nozzle according to claim 5, characterized in that: The inner shell (200) has an opening at the upper end and a step in the circumference. The air guide (300) is inserted into the inner shell (200) and has an edge on the step in the circumference at its upper end.

7. The air-concentrating nozzle according to claim 6, characterized in that: A second air gap (500) is provided between the upper end of the air guide (300) and the outer shell (100).

8. The air-concentrating nozzle according to claim 6, characterized in that: A third air gap (600) is provided between the lower end of the air guide (300) and the inner shell (200).

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