Fan, fan parameter adjusting method and air supply equipment

Abstract

The invention relates to a fan, a fan parameter adjusting method and air supply equipment, the fan comprises a fan blade assembly, the fan blade assembly comprises a plurality of blades and a fixing part, the blades are all connected with the fixing part, the blades are asymmetrically arranged, and adjacent blades form an air duct; the blade comprises a connecting part and an end part, the end part is connected with the connecting part, and the end part is bent towards the air outlet direction of the air duct and forms an air outlet angle; the connecting part is connected with the fixing piece, and the connecting part inclines towards the air inlet direction of the air duct and forms an air inlet angle. The blade passing frequency can be dispersed, and resonance with the system inherent frequency is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the fan technology field, in particular to a fan, a fan parameter adjustment method and an air supply equipment. BACKGROUND

[0002] In the existing fan blade design, the configuration of the blade angle, length, number and width-diameter ratio directly affects the airflow direction and pressure distribution. If the design is unreasonable, it is easy to cause turbulence, boundary layer separation and energy loss, and then produce high-frequency noise. For example, the inlet angle and outlet angle range of the traditional fan blade are not optimized, the number of blades is even and evenly distributed, which is easy to cause resonance noise due to periodic airflow impact. In addition, although high-density blades can improve static pressure, the blade passing frequency is concentrated, and noise energy is not effectively dispersed. Therefore, there is an urgent need for a fan blade design scheme that can balance air volume, air pressure and significantly reduce noise. SUMMARY

[0003] The purpose of the present application is to provide a fan, a fan parameter adjustment method and an air supply equipment, which can at least significantly reduce noise.

[0004] In a first aspect, the present application provides a fan, comprising: a fan blade assembly, wherein the fan blade assembly comprises a plurality of blades and a fixing member, each of the plurality of blades is connected with the fixing member, the plurality of blades are arranged asymmetrically, and adjacent blades form an air duct. The blade comprises a connecting portion and an end portion, the end portion is connected with the connecting portion, the end portion is curved towards the air outlet direction of the air duct and forms an outlet angle; The connecting portion is connected with the fixing member, and the connecting portion is inclined towards the air inlet direction of the air duct and forms an inlet angle.

[0005] This optional embodiment can make the blade rotate in the air duct based on the inlet angle to obtain the airflow flowing in from the inlet air direction, and based on the outlet angle and the air duct to push the airflow out, and at the same time, by arranging the plurality of blades asymmetrically, the blade passing frequency can be dispersed to avoid resonance with the system inherent frequency.

[0006] In an optional embodiment, the angle range of the outlet angle is 85°-115°, and the angle range of the inlet angle is 25°-65°.

[0007] The optional embodiment can set the angle range of the air outlet angle to 85°-115°, which can guide the air flow to diffuse gently and reduce the local high pressure area. On the other hand, by setting the angle range of the air inlet angle to 25-65°, the laminar flow can be formed in the angle range of 25-65°, and finally by using the angle range of the air outlet angle and the angle range of the air inlet angle, the boundary layer separation and turbulence can be reduced, thereby reducing the energy loss.

[0008] In the optional embodiment, the angle range of the air inlet angle is 30-60°, and the angle range of the air outlet angle is 90-110°.

[0009] The optional embodiment can set 30-60° as the preferred angle range of the air inlet angle and 90-110° as the preferred angle range of the air outlet angle, wherein the air inlet angle and the air outlet angle are more optimal for energy loss reduction.

[0010] In the optional embodiment, the plurality of blades are asymmetrically arranged based on the Fibonacci sequence.

[0011] The optional embodiment can achieve the asymmetric arrangement of the blades by the Fibonacci sequence.

[0012] In the optional embodiment, the number of the plurality of blades is a prime number.

[0013] The optional embodiment can set the number of the blades to a prime number to disperse the noise frequency.

[0014] In a second aspect, the application provides a fan parameter adjustment method for the fan according to any one of the preceding embodiments, the fan parameter adjustment method comprising: obtaining target parameters of the fan, wherein the target parameters of the fan include the air volume of the fan, the static pressure of the fan, and the space parameter of the fan; determining design parameters of the fan based on the air volume of the fan, the static pressure of the fan, and the space parameter of the fan, wherein the design parameters of the fan include the air outlet angle of the blades of the fan and the air inlet angle of the blades of the fan.

[0015] The method of the application can obtain the target parameters of the fan, wherein the target parameters of the fan include the air volume of the fan, the static pressure of the fan, and the space parameter of the fan, and then determine the design parameters of the fan based on the air volume of the fan, the static pressure of the fan, and the space parameter of the fan, wherein the design parameters of the fan include the air outlet angle of the blades of the fan and the air inlet angle of the blades of the fan.

[0016] In an optional embodiment, the design parameters of the fan further include a width of the blade and a diameter of the blade.

[0017] The optional embodiment can adjust the width of the blade and the diameter of the blade according to the target parameters.

[0018] In an optional embodiment, the design parameters of the fan are determined based on the air volume of the fan, the static pressure of the fan, and the space parameters of the fan, including: When the air pressure of the fan is less than the air pressure preset threshold, the ratio of the width of the blade to the diameter of the blade is increased to increase the blade working area.

[0019] The optional embodiment can increase the ratio of the width of the blade to the diameter of the blade to increase the blade working area when the air pressure of the fan is less than the air pressure preset threshold.

[0020] In the optional embodiment, the design parameters of the fan are determined based on the air volume of the fan, the static pressure of the fan, and the space parameters of the fan, further including: When the air volume of the fan is less than the air volume preset threshold, the diameter of the blade is increased or the ratio of the width of the blade to the diameter of the blade is adjusted.

[0021] The optional embodiment can increase the diameter of the blade or adjust the ratio of the width of the blade to the diameter of the blade when the air volume of the fan is less than the air volume preset threshold, thereby optimizing the flow channel.

[0022] In a third aspect, the application provides an air supply device, which comprises the fan according to any one of the preceding embodiments.

[0023] The air supply device of the application has the fan of the application, and thus has less noise.

[0024] Other features and advantages of the application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 is a structural schematic diagram of a fan provided by the embodiments of the application; Figure 2is a structural schematic diagram of a fan blade assembly disclosed by an embodiment of the present application; Figure 3 is a turbulent flow schematic diagram at a conventional angle; Figure 4 is a turbulent flow schematic diagram at an angle disclosed by an embodiment of the present application; Figure 5 is a flow schematic diagram of a fan parameter adjustment method provided by an embodiment of the present application.

[0027] Icon: fan blade assembly 10, motor 20. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms “inner”, “outer” and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second” and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms “set”, “connected” should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the existing fan blade design, the configuration of the blade angle, length, number and width-diameter ratio directly affects the airflow direction and pressure distribution. If the design is unreasonable, it is easy to cause turbulent flow, boundary layer separation and energy loss, and then produce high-frequency noise. For example, the inlet angle and outlet angle range of the traditional fan blade are not optimized, the number of blades is even and evenly distributed, and resonance noise is easily caused by periodic airflow impact. In addition, although high-density blades can improve static pressure, the blade passing frequency is concentrated, and noise energy is not effectively dispersed. Therefore, there is an urgent need for a fan blade design scheme that can balance air volume, air pressure and significantly reduce noise.

[0032] To overcome the defects of the prior art, the fan, the fan parameter adjustment method and the air supply equipment provided in the embodiments of the present application can make the blades rotate in the air duct, obtain the airflow flowing in based on the air inlet angle, and push the airflow out based on the air outlet angle and the air duct. Meanwhile, by arranging the plurality of blades asymmetrically, the passing frequency of the blades can be dispersed to avoid resonance with the inherent frequency of the system.

[0033] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a fan provided in the embodiments of the present application. As shown in Figure 1 , the fan provided in the embodiments of the present application comprises a fan blade assembly 10, wherein the fan blade assembly 10 comprises a plurality of blades and a fixing member, the plurality of blades are connected with the fixing member, the plurality of blades are arranged asymmetrically, and adjacent blades form an air duct. The blade comprises a connecting portion and an end portion, the end portion is connected with the connecting portion, and the end portion is curved towards the air outlet direction of the air duct and forms an air outlet angle. The connecting portion is connected with the fixing member, and the connecting portion is inclined towards the air inlet direction of the air duct and forms an air inlet angle.

[0034] The optional embodiment can make the blades rotate in the air duct, obtain the airflow flowing in based on the air inlet angle, and push the airflow out based on the air outlet angle and the air duct. Meanwhile, by arranging the plurality of blades asymmetrically, the passing frequency of the blades can be dispersed to avoid resonance with the inherent frequency of the system.

[0035] In the embodiments of the present application, the passing frequency of the blade refers to that when the blade rotates, the blade will periodically sweep through a stationary component, wherein the blade will generate fluid dynamic excitation vibration every time it sweeps through the stationary component. If the vibration frequency and its harmonics resonate with the inherent frequency of the system, the noise will be increased. Based on this, by arranging the plurality of blades asymmetrically, the passing frequency of the blade can be avoided from coinciding with the inherent frequency, so as to reduce the noise, and especially the high-frequency resonance noise can be suppressed. Specifically, by verifying the airflow distribution and the noise level through CFD simulation, the noise peak value can be reduced by 20% to 30% according to the embodiments of the present application.

[0036] In the embodiments of the present application, the plurality of blades refer to a plurality of blades, for example, the fan can be connected with 7 blades.

[0037] In the embodiments of the present application, the fixing member refers to a device for fixing the blade on the rotating shaft of the motor of the fan, for example, the fixing member can be a fixing member.

[0038] In the embodiments of the present application, the connecting portion of the blade refers to the part of the blade close to the fixing member, and the end portion of the blade refers to the part of the blade close to the air duct. The connecting portion of the blade and the end portion of the blade can be integrally formed.

[0039] In the embodiment of the present application, the fan blade assembly 10 can be rotated by the action of the motor 20.

[0040] In the embodiment of the present application, please refer to Figure 2 , Figure 2 is a structural schematic diagram of a fan blade assembly disclosed by the embodiment of the present application. As shown in Figure 2 , the fan blade assembly includes a plurality of blades, wherein the air outlet angle of the blade is shown as OUT-A in Figure 2 , and the air inlet angle of the blade is shown as IN-A in Figure 2 .

[0041] In the embodiment of the present application, as an optional implementation, the angle range of the air outlet angle is 85°-115°, and the angle range of the air inlet angle is 25-65°.

[0042] The optional implementation can set the angle range of the air outlet angle to 85°-115°, which can guide the gentle diffusion of airflow and reduce the local high-pressure area. On the other hand, by setting the angle range of the air inlet angle to 25-65°, laminar flow can be formed within the angle range of 25-65°, and finally by using the angle range of the air outlet angle and the angle range of the air inlet angle, the boundary layer separation and turbulence can be reduced, thereby reducing the energy loss.

[0043] In the optional implementation, please refer to Figure 3 and Figure 4 , wherein Figure 3 is a turbulent flow schematic diagram under a conventional angle, Figure 4 is a turbulent flow schematic diagram under the angle of the embodiment of the present application. By comparing Figure 3 and Figure 4 , it can be known that by using the above air outlet angle and air inlet angle, the turbulence can be reduced. Specifically, please refer to the S1 position in Figure 3 and the S2 position in Figure 4 , Figure 3 the color of the S1 position is darker, corresponding to more turbulence, and Figure 4 the color of the S2 position is lighter, corresponding to less turbulence.

[0044] It should be noted that the implementation Figure 3 and Figure 3 can be generated by corresponding airflow simulation software. For example, the airflow distribution and noise level can be verified by CFD simulation.

[0045] In the embodiment of the present application, as an optional implementation, the angle range of the air inlet angle is 30-60°, and the angle range of the air outlet angle is 90-110°.

[0046] The optional embodiment can take 30-60° as a preferred angle range of the inlet angle, and can take 90-110° as a preferred angle range of the outlet angle, wherein the inlet angle and the outlet angle are more optimal for energy loss reduction effect.

[0047] In the optional embodiment, 30-60° is taken as a preferred range of 25-65°, which can further reduce energy loss. In addition, 35-55° can also be taken as a further preferred range.

[0048] In the optional embodiment, the plurality of blades are asymmetrically arranged based on the Fibonacci sequence.

[0049] The optional embodiment can achieve asymmetric arrangement of the blades by the Fibonacci sequence.

[0050] In the optional embodiment, the asymmetric arrangement of the blades by the Fibonacci sequence means that the number of the blades is set according to the Fibonacci sequence, and the corresponding blades are arranged.

[0051] In the optional embodiment, the number of the plurality of blades is a prime number.

[0052] The optional embodiment can set the number of the blades as a prime number to disperse noise frequency.

[0053] In the optional embodiment, setting the number of the blades as a prime number can mean setting the number of the blades as 11, or setting the number of the blades as 7.

[0054] In the embodiment, the spacing between adjacent blades in the plurality of blades can be optimized by the golden ratio algorithm to further reduce periodic airflow impact noise.

[0055] Please refer to Figure 5 , Figure 5 is a flowchart of a fan parameter adjustment method provided by the embodiment, wherein the method is used for the fan as in any of the preceding embodiments. As shown in Figure 5 , the fan parameter adjustment method comprises the following steps: 101, obtaining a target parameter of the fan, wherein the target parameter of the fan includes a fan flow, a static pressure of the fan, and a space parameter of the fan; 102, determining a design parameter of the fan based on the fan flow, the static pressure of the fan, and the space parameter of the fan, wherein the design parameter of the fan includes an outlet angle of the blade of the fan and an inlet angle of the blade of the fan.

[0056] The method of the embodiment of the present application obtains the target parameter of the fan, wherein the target parameter of the fan includes the air volume of the fan, the static pressure of the fan, and the space parameter of the fan, and then the design parameter of the fan is determined based on the air volume of the fan, the static pressure of the fan, and the space parameter of the fan, wherein the design parameter of the fan includes the outlet angle of the blade of the fan and the inlet angle of the blade of the fan.

[0057] In the embodiment of the present application, the target parameter of the fan can be the demand parameter of the fan, for example, the use environment of the vibrating fan, if the air volume of the fan needs to reach a value A, the value A is the air volume demand.

[0058] In the embodiment of the present application, the specific manner of determining the outlet angle of the blade of the fan and the inlet angle of the blade of the fan based on the air volume of the fan, the static pressure of the fan, and the space parameter of the fan is as follows: determining the space constraint condition according to the space parameter, and determining the maximum diameter of the fan blade satisfying the space constraint condition based on the space constraint condition; determining the outlet angle of the blade of the fan and the inlet angle of the blade of the fan based on the maximum diameter of the fan blade satisfying the space constraint condition, the air volume of the fan, and the static pressure of the fan.

[0059] In the embodiment of the present application, the specific manner of determining the outlet angle of the blade of the fan and the inlet angle of the blade of the fan based on the maximum diameter of the fan blade satisfying the space constraint condition, the air volume of the fan, and the static pressure of the fan is as follows: taking the maximum diameter of the fan blade satisfying the space constraint condition, the air volume of the fan, and the static pressure of the fan as the simulation constraint condition of the CFD simulation software, so as to obtain the outlet angle of the blade of the fan and the inlet angle of the blade of the fan based on the CFD simulation software.

[0060] In the embodiment of the present application, the space parameter of the fan is used to represent the space limitation condition of the fan, for example, when the fan is applied in a vehicle seat, the space limitation condition is determined according to the installation space limitation of the fan in the vehicle seat.

[0061] In the embodiment of the present application, as an optional implementation manner, the design parameter of the fan further includes the width of the blade and the diameter of the blade.

[0062] The optional implementation manner can adjust the width of the blade and the diameter of the blade through the target parameter.

[0063] In the optional implementation manner, the width of the blade refers to the dimension of the blade in the plane perpendicular to the rotation axis and along the radial direction. The diameter of the blade refers to the diameter of the circle drawn by the tip of the blade when the fan wheel rotates.

[0064] In the embodiment of the present application, as an optional implementation, the step of determining the design parameters of the fan based on the air volume of the fan, the static pressure of the fan and the space parameters of the fan comprises the following steps: When the air pressure of the fan is less than the air pressure preset threshold, the ratio of the width of the blade to the diameter of the blade is increased to increase the blade working area.

[0065] The optional implementation can increase the ratio of the width of the blade to the diameter of the blade when the air pressure of the fan is less than the air pressure preset threshold, so as to increase the blade working area.

[0066] For the optional implementation, increasing the blade working area can improve the air pressure of the fan, so that the air pressure reaches or exceeds the air pressure preset threshold, thereby meeting the air pressure requirement.

[0067] In the optional implementation, the air pressure preset threshold is determined according to the air pressure requirement.

[0068] In the embodiment of the present application, as an optional implementation, the step of determining the design parameters of the fan based on the air volume of the fan, the static pressure of the fan and the space parameters of the fan further comprises the following steps: When the air volume of the fan is less than the air volume preset threshold, the diameter of the blade is increased or the ratio of the width of the blade to the diameter of the blade is adjusted.

[0069] The optional implementation can increase the diameter of the blade or adjust the ratio of the width of the blade to the diameter of the blade when the air volume of the fan is less than the air volume preset threshold, thereby optimizing the flow channel.

[0070] In the optional implementation, increasing the diameter of the blade while keeping the width of the blade unchanged can reduce the blade working area, thereby improving the air volume.

[0071] In addition, the embodiment of the present application also provides an air supply device, which comprises the fan according to any one of the foregoing implementations.

[0072] The air supply device of the embodiment of the present application has the fan of the present application, and thus has smaller noise.

[0073] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0074] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fan, characterized in that: include: A fan blade assembly, wherein the fan blade assembly includes a plurality of blades and a fixing member, the plurality of blades are connected to the fixing member, the plurality of blades are arranged asymmetrically, and adjacent blades form an air duct; The blade includes a connecting portion and an end portion, the end portion is connected to the connecting portion, and the end portion is bent toward the air outlet direction of the air duct to form an air outlet angle; The connecting portion is connected to the fixing member, and the connecting portion is inclined toward the air inlet direction of the air duct to form an air inlet angle.

2. The fan according to claim 1, characterized in that The air outlet angle ranges from 85° to 115°, and the air inlet angle ranges from 25° to 65°.

3. The fan according to claim 2, characterized in that The air inlet angle ranges from 30° to 60°, and the air outlet angle ranges from 90° to 110°.

4. The fan according to claim 1, wherein: The plurality of blades are asymmetrically arranged based on the Fibonacci sequence.

5. The fan according to claim 1, wherein: The number of some of the blades is a prime number.

6. A method for adjusting fan parameters for a fan according to any one of claims 1 to 5, characterized in that: The fan parameter adjustment method includes: Acquiring target parameters of the fan, wherein the target parameters of the fan include the air volume of the fan, the static pressure of the fan, and the spatial parameters of the fan; The design parameters of the fan are determined based on the air volume of the fan, the static pressure of the fan and the spatial parameters of the fan. The design parameters of the fan include the air outlet angle of the fan blades and the air inlet angle of the fan blades.

7. The fan parameter adjustment method according to claim 6, characterized in that: The design parameters of the fan also include the width of the blade and the diameter of the blade.

8. The fan parameter adjustment method according to claim 7, characterized in that: The determining of the design parameters of the fan based on the air volume of the fan, the static pressure of the fan, and the spatial parameters of the fan includes: When the wind pressure of the fan is less than a preset wind pressure threshold, the ratio of the width of the blade to the diameter of the blade is increased to increase the working area of ​​the blade.

9. The fan parameter adjustment method according to claim 8, characterized in that: The determining of the design parameters of the fan based on the air volume of the fan, the static pressure of the fan, and the spatial parameters of the fan further includes: When the air volume of the fan is less than a preset air volume threshold, the diameter of the blade is increased or the ratio of the width of the blade to the diameter of the blade is adjusted.

10. An air supply device, characterized in that: The air supply equipment includes the fan according to any one of claims 1 to 5.

Images