A fan wheel structure of a vehicle fan

Abstract

The utility model discloses a kind of wind wheel structures of vehicle air blower, design blade is divided into inlet section and outlet section in width direction, respectively with two kinds of curvature, blade one end is connected with mounting plate through inlet section, other end is connected with connecting plate through outlet section, make inlet section be located in the inboard of connecting plate, outlet section is located in the outboard of mounting plate;The sectional design and sectional connection of this blade not only improve the overall structural strength of wind wheel, but also facilitate through up and down demolding forming;By setting the curvature of inlet section and outlet section is different, while maintaining inlet installation angle P1 in conventional range, to resist radial deformation when injection molding, outlet installation angle P2 can be increased to more than 160 °, so as to reduce the included angle of wind wheel air outlet and volute inner wall, reduce the kinetic energy loss caused by impact;Therefore, the utility model effectively solves the problem that the existing wind wheel structural strength is weak and the outflow kinetic energy loss is large, significantly improves the structural strength of wind wheel and air output.

Description

Technical Field

[0001] This utility model belongs to the technical field of general vehicle ventilation equipment, specifically relating to a blower structure for a vehicle blower. Background Technology

[0002] The air intake assembly of an automotive air conditioner includes an air box structure and a volute structure. For example, Chinese patent CN212765577U discloses a double-layer air intake box where the air box structure is connected to the upper part of the volute structure, and the blower is connected to the lower part of the volute structure. The blower's impeller is located inside the volute structure. The impeller is a key component providing airflow for the automotive air conditioner, typically rotating at speeds exceeding 3000 RPM. It experiences heavy workloads and requires high noise levels and structural strength. (See attached manual.) Figure 1 and attached Figure 2 As shown, the existing wind turbine structure mainly includes a mounting plate 1, blades 2, and an annular connecting plate 3. Several blades are distributed circumferentially around the connecting plate, with the length direction of the blades corresponding to the axial direction of the connecting plate. The mounting plate is connected to the lower end of the blades, and the connecting plate is close to the upper end of the blades and connected to the outer side of each blade. The blades used in the existing wind turbine structure have a constant curvature arc extending along their width direction. Based on this, to resist radial deformation of the blades during injection molding, the inlet mounting angle P1 is generally set to 55°–90°, and correspondingly, the outlet mounting angle P2 is 130°–160°. In this wind turbine structure, not only is the cantilever of the blades on the inner side of the connecting plate large, resulting in insufficient structural strength at the upper end of the blades, making it difficult to control the roundness of the wind turbine during injection molding, but deformation, vibration, and abnormal noise are also prone to occur during high-speed operation. Furthermore, as shown in the attached manual… Figure 2 and attached Figure 3 As shown, due to the limited outlet installation angle of blade 2, the angle between the wind turbine outlet and the inner wall of the volute 4 is relatively large, resulting in significant kinetic energy loss due to impact. To increase airflow, it is often necessary to increase the size of the wind turbine, which can easily affect the overall size of the inlet box assembly. Therefore, it is necessary to design a wind turbine structure with high structural strength and low outlet kinetic energy loss. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a wind turbine structure for a vehicle blower, which solves the technical problems of weak strength and large loss of kinetic energy in the existing wind turbine structure, and achieves the effect of improving the strength of the wind turbine structure and the air volume.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A rotor structure for a vehicle blower includes blades, a mounting plate, and an annular connecting plate. Several blades are circumferentially spaced around the connecting plate, with the length direction of the blades corresponding to the axial direction of the connecting plate. The blades extend along a path with two curvatures in the width direction, and are divided into an inlet section and an outlet section corresponding to each of the two curvatures. The blades are located between the mounting plate and the connecting plate, with one end connected to the mounting plate via the inlet section and the other end connected to the connecting plate via the outlet section. The inlet section is located inside the connecting plate, and the outlet section is located outside the mounting plate. The inlet mounting angle P1 of the blades is 55°–90°, and the outlet mounting angle P2 is greater than 160°.

[0005] Furthermore, the inlet and outlet sections are smoothly connected.

[0006] Furthermore, the inlet installation angle P1 of the blade is 69° and the outlet installation angle P2 is 166°.

[0007] Furthermore, the blade, mounting plate, and connecting plate are integrally injection molded.

[0008] Furthermore, the side of the blade facing the inside of the connecting plate is smoothly connected to the mounting plate through a curved chamfer.

[0009] Furthermore, in the width direction of the blade, the curvature of the extension path of the arc-shaped chamfer is the same as the curvature of the extension path of the inlet section.

[0010] Furthermore, the connecting plate is trumpet-shaped with the larger diameter end facing the mounting plate, and the end face of the blade's outlet section connected to the connecting plate is a concave arc surface, the curvature of which is the same as that of the connecting plate.

[0011] Furthermore, the diameter of the smaller end of the connecting plate is larger than the maximum diameter of the mounting plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The impeller structure of the vehicle blower described in this utility model is designed with blades divided into an inlet section and an outlet section in the width direction, each with two different curvatures. One end of the blade is connected to the mounting plate through the inlet section, and the other end is connected to the connecting plate through the outlet section, with the inlet section located inside the connecting plate and the outlet section located outside the mounting plate. This segmented design and connection of the blades not only improves the overall structural strength of the impeller but also facilitates molding through upper and lower demolding. By setting different curvatures for the inlet and outlet sections, while keeping the inlet mounting angle P1 within the conventional range to resist radial deformation during injection molding, the outlet mounting angle P2 can be increased to over 160°, thereby reducing the angle between the impeller outlet and the inner wall of the volute and reducing kinetic energy loss caused by impact. Therefore, this utility model can provide a larger air volume at the same rotational speed while ensuring structural strength and good static performance. Attached Figure Description

[0013] Figure 1 This is a perspective view of the existing wind turbine structure described in the background art; Figure 2 for Figure 1 A schematic diagram of the blade angle; Figure 3 for Figure 1 A schematic diagram of the turbine structure within the volute structure; Figure 4 This is a perspective view of the wind turbine structure described in the embodiment; Figure 5 for Figure 4 A schematic diagram of the blade angle; Figure 6 for Figure 4 A radial cross-sectional view of the wind turbine structure; Figure 7 for Figure 4 Top view of the wind turbine structure (connecting plates hidden); Figure 8 for Figure 7 A schematic diagram of the wind turbine structure in the volute structure as shown in the figure; The components include: mounting plate 1, blade 2, connecting plate 3, volute 4, inlet section 5, outlet section 6, and curved chamfered part 7. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. In the wind turbine structure, the inlet installation angle P1 of blade 2 refers to the angle between the tangent direction of the blade at the impeller inlet and the inlet circumferential velocity direction (i.e., the tangent direction of the radius of that point), and the outlet installation angle P2 refers to the angle between the tangent direction of the blade at the impeller outlet and the outlet circumferential velocity direction (i.e., the tangent direction of the radius of that point, perpendicular to the radius). Please refer to the following for details. Figure 2 and Figure 5 .

[0015] Example: Please see Figure 4 and Figure 5A rotor structure for a vehicle blower includes blades 2, a mounting plate 1, and an annular connecting plate 3. Several blades 2 are circumferentially distributed around the connecting plate 3. The length direction of the blades 2 corresponds to the axial direction of the connecting plate 3. The extension path of the blades 2 in the width direction is an arc with two curvatures. The blades 2 are divided into an inlet section 5 and an outlet section 6, each corresponding to one of the two curvatures. The blades 2 are located between the mounting plate 1 and the connecting plate 3. One end of the blade 2 is connected to the mounting plate 1 via the inlet section 5, and the other end is connected to the connecting plate 3 via the outlet section 6. The inlet section 5 of the blade 2 is located inside the connecting plate 3, and the outlet section 6 is located outside the mounting plate 1. The inlet mounting angle P1 of the blade 2 is 55°–90°, and the outlet mounting angle P2 is greater than 160°.

[0016] The impeller structure of the vehicle blower described in this utility model is designed with blades 2 divided into an inlet section 5 and an outlet section 6 in the width direction, each with two different curvatures. One end of blade 2 is connected to the mounting plate 1 through the inlet section 5, and the other end is connected to the connecting plate 3 through the outlet section 6, so that the inlet section 5 is located inside the connecting plate 3 and the outlet section 6 is located outside the mounting plate 1. This segmented design and segmented connection of blade 2 not only improves the overall structural strength of the impeller but also facilitates demolding. See also Figure 5 , Figure 7 and Figure 8 By setting different curvatures for the inlet section 5 and the outlet section 6, while keeping the inlet installation angle P1 within the conventional range of 55° to 90° to resist radial deformation during injection molding, the outlet installation angle P2 can be increased to over 160°, thereby reducing the angle between the wind turbine outlet and the inner wall of the volute 4 and reducing kinetic energy loss caused by impact. Therefore, this utility model effectively solves the problems of weak structural strength and large kinetic energy loss of existing wind turbines, and significantly improves the structural strength and air volume of the wind turbine.

[0017] Please see Figure 5 and Figure 7 The inlet section 5 and the outlet section 6 are smoothly connected. In this way, based on the fact that the curvatures of the inlet section 5 and the outlet section 6 are not equal, the inlet section 5 and the outlet section 6 are designed to be smoothly connected. This smooth transition design makes the airflow between the blades 2 smoother, which helps to reduce the impact of the airflow on the blades 2, thereby improving the structural stability and smooth operation of the wind turbine.

[0018] Although increasing the outlet installation angle P2 can reduce the angle between the impeller outlet and the inner wall of the volute 4, thereby reducing kinetic energy loss, the outlet installation angle P2 is not necessarily better the larger it is. An excessively large outlet installation angle P2 will not only reduce the air outlet between adjacent blades 2, but also affect the arrangement angle of the inlet section 5, thus affecting the air intake, air output, and structural stability of the blades 2. This utility model further limits the inlet installation angle P1 of the blades 2 to 69° and the outlet installation angle P2 to 166°. Through CFD simulation and mold verification, at the same rotational speed, the air volume increases from 530.7 m³ / h to 552 m³ / h, an increase of 4.01%, which is a significant increase in air volume. The circular runout of the impeller injection molding line decreases from 0.38-0.62 to 0.3-0.42, a reduction of about 30%, which improves the yield rate of impeller injection molding. The sound pressure level decreases from 63.6 dB to 62.4 dB, a reduction of 1.2 dB, which improves noise control.

[0019] The blade 2, mounting plate 1, and connecting plate 3 are integrally injection molded. Thus, based on the structure that the inlet section 5 is located inside the connecting plate 3 and the outlet section 6 is located outside the mounting plate 1, the wind turbine structure can be integrally injection molded like existing wind turbines. This not only helps to reduce manufacturing difficulty, but also ensures the overall structural strength of the wind turbine, improves production efficiency, and enhances product consistency.

[0020] Please see Figure 4 and Figure 6 The side of blade 2 facing the inner side of the connecting plate 3 is smoothly connected to the mounting plate 1 through the arc-shaped chamfer 7. This not only enhances the strength of the wind turbine structure and avoids stress concentration, but also improves the impeller's ability to resist permanent deformation or fracture during high-speed rotation. At the same time, this design optimizes the flow characteristics of the airflow entering the airflow channel between blades 2, causing the airflow to gradually turn and accelerate, reducing the impact and eddies caused by the sudden entry of airflow, thereby improving airflow stability, reducing flow losses, and increasing wind turbine efficiency. In addition, the arc-shaped chamfer 7 promotes the airflow to enter along the wall, making the pressure and velocity distribution more uniform, reducing turbulent noise at the root of blade 2, effectively reducing the noise and vibration of the wind turbine during operation, and improving the reliability and comfort of the product.

[0021] Please see Figure 4 and Figure 5 In the width direction of blade 2, the curvature of the extension path of the arc-shaped chamfered portion 7 is the same as the curvature of the extension path of the inlet section 5; thus, by making the curvature of the arc-shaped chamfered portion 7 consistent with that of the inlet section 5, the transition of airflow from the mounting plate 1 to the blade 2 is further optimized, enhancing the continuity and smoothness of airflow, and reducing flow separation and energy loss.

[0022] Please see Figure 4 and Figure 6The connecting plate 3 is trumpet-shaped with its larger diameter end facing the mounting plate 1. The end face of the blade 2's outlet section 6, which connects to the connecting plate 3, is a concave arc surface with the same curvature as the connecting plate 3. This design not only improves the rigidity of the connecting plate 3 and increases the connection area with the blade 2, thus enhancing the overall strength of the wind turbine structure, but also helps guide the airflow smoothly in, reducing turbulence at the top of the wind turbine and improving airflow distribution and wind turbine performance. Specifically, the diameter of the smaller diameter end of the connecting plate 3 is also larger than the maximum diameter of the mounting plate 1, facilitating the integral molding of the wind turbine through upper and lower demolding during the injection molding process. Figure 6 For example, the mold corresponding to the part inside the connecting plate 3 and above the mounting plate 1 detaches upwards, while the mold corresponding to the part below the connecting plate 3 and below the mounting plate 1 and outside the mounting plate 1 detaches downwards.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A fan impeller structure for a vehicle blower, characterized in that: It includes blades, a mounting plate, and an annular connecting plate. Several blades are distributed circumferentially around the connecting plate. The length direction of the blades corresponds to the axial direction of the connecting plate. The extension path of the blades in the width direction is an arc with two curvatures. The blades are divided into an inlet section and an outlet section corresponding to the two curvatures in the width direction. The blades are located between the mounting plate and the connecting plate. One end of the blade is connected to the mounting plate through the inlet section, and the other end is connected to the connecting plate through the outlet section. The inlet section of the blade is located inside the connecting plate, and the outlet section is located outside the mounting plate. The inlet mounting angle P1 of the blade is 55° to 90°, and the outlet mounting angle P2 is greater than 160°.

2. The impeller structure of a vehicle blower according to claim 1, characterized in that: The inlet and outlet sections are smoothly connected.

3. The impeller structure of a vehicle blower according to claim 1, characterized in that: The inlet installation angle P1 of the blade is 69° and the outlet installation angle P2 is 166°.

4. The impeller structure of a vehicle blower according to claim 1, characterized in that: The blades, mounting plate, and connecting plate are integrally injection molded.

5. The impeller structure of a vehicle blower according to claim 1, characterized in that: The side of the blade facing the inside of the connecting plate is smoothly connected to the mounting plate through a curved chamfer.

6. The impeller structure of a vehicle blower according to claim 5, characterized in that: In the width direction of the blade, the curvature of the extension path of the arc-shaped chamfer is the same as the curvature of the extension path of the inlet section.

7. The impeller structure of a vehicle blower according to claim 1, characterized in that: The connecting plate is trumpet-shaped with the larger diameter end facing the mounting plate. The end face of the blade's exit section connected to the connecting plate is a concave arc surface, and the curvature of the concave arc surface is the same as that of the connecting plate.

8. The impeller structure of a vehicle blower according to claim 7, characterized in that: The diameter of the smaller end of the connecting plate is larger than the maximum diameter of the mounting plate.

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