Small, sustained, high-speed blower

Abstract

To provide a compact, sustainable, high-speed blower that improves overall efficiency, stability, and service life. [Solution] With respect to the blower, by improving the optimized design of the air tube, the wind resistance coefficient of the guide vanes can be reduced while simultaneously ensuring a large value for the flow rate in the path, promoting the linear and uniform extraction of fluid from the air tube, allowing the fan 4 to operate stably. Support auxiliary structures such as the spring 26, bearing 22, and air guide pad further stabilize the position of the fan, preventing centrifugal vibration of the fan from reacting with the rotating shaft 21 and affecting the rotation efficiency of the rotating shaft, thereby greatly improving the operating environment of the fan.

Description

Technical Field

[0001] The present invention relates to the field of blower technology, and more specifically, it relates to a small-sized sustainable high-speed blower.

Background Art

[0002] At present, with the miniaturization, weight reduction, and high-speedization of brushless motors progressing, efficient propeller blowers that match high rotational speeds, especially those with a diameter of 100 mm or less, are few. Since products such as high-speed blower motors, bladeless fans, and hair irons have emerged, the development of small-sized propeller blowers and high-speed direct current brushless motors has started in the household appliance industry.

[0003] The smaller the size of a household appliance product, the higher the requirements for the details of vibration damping and noise reduction of the motor in its application scenario. Many currently commercially available improvement methods improve the structural size of the brushless motor itself and ignore the design influence of combining the air guiding structure to adapt to the application scenario of household appliance products. When the impeller rotates, gas enters the impeller axially from the air inlet, is pushed by the blades in the impeller to improve the energy of the gas, and then flows to the guide blades. The guide blades guide the gas to flow outwards. However, because the impeller rotates at high speed, the design of the angle of the impeller is adapted to the design of the guide blades, and the gas flowing out of the guide blades is likely to spurt intermittently, deteriorating the smoothness of air intake by the axial guiding of the blades. Moreover, the ejected gas reacts on the impeller, promoting the vibration of the impeller, thus becoming one of the difficult technical problems that are difficult to solve.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In view of the deficiencies of the above prior art, the object of the present invention is to provide a small-sized sustainable high-speed blower, which has the advantages of straight, smooth air flow, high stability, and long service life.

Means for Solving the Problems

[0005] The above technical objectives of the present invention are achieved by the following technical solutions. A small, sustained, high-speed blower comprising a stator module, a rotor module that rotates on the stator module, a duct fitted into the stator module, and a fan module attached to the rotor, wherein the duct includes an outer cylinder and an inner cylinder installed on the same central axis as the outer cylinder, and the inner cylinder is fitted into the rotor module and fixed to the stator module. The outer cylinder has an air intake section and an air exhaust section distributed along its longitudinal direction, an air guide pad is laid on the inner wall of the air intake section, the air guide pad extends along the axial direction of the air cylinder, the air intake section flares outward near the air exhaust section, the diameter of the fan is slightly smaller than the diameter of the air guide pad, the air exhaust section extends linearly outward, a plurality of uniformly distributed guide vanes are connected and fixed between the air exhaust section and the outer cylinder, the guide vanes are installed in an arc-shaped blade form, the distance between adjacent guide vanes is always the same, a curved conductive path is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder and adjacent guide vanes, and the volume of adjacent paths is the same. An air intake angle is provided on one side of the inner cylinder closest to the fan, and the inclination angle of the air intake angle is characterized to be the same as the inclination angle of the air guide pad.

[0006] Preferably, the rotor module includes a rotating shaft, the rotating shaft is fitted with a rotating bearing, a first balance block, a second balance block, and an auxiliary bearing along its longitudinal direction, the first and second balance blocks are installed at both ends of the rotating shaft to provide stable support, the auxiliary bearing is connected to the stator module, the fan is attached to the rotating bearing, a spring is connected between the rotating bearing and the first balance block, and the spring is fitted onto the rotating shaft.

[0007] Preferably, the fan includes an impeller mounted on the rotating bearing and blades uniformly distributed along the circumferential direction of the impeller, with a setting ratio of 11:29 between the diameter of the impeller and the length of the blades.

[0008] Preferably, the inclination angle of the blades matches the inclination angle of the guide vanes, creating a sustained and stable natural wind condition, significantly reducing the feeling of the blades striking the wind, and eliminating the feeling of the blades directly striking the wind.

[0009] Preferably, the air guide pad is made of stainless steel and is attached to the inner wall of the outer cylinder, limiting the mounting space of the fan within the air cylinder.

[0010] Preferably, the inclination angle range for mounting the blades is between 20° and 30°. [Effects of the Invention]

[0011] As described above, the present invention has the following beneficial effects. By improving the optimized design of the air tube, the wind resistance coefficient of the guide vanes can be reduced while simultaneously ensuring a large value for the flow rate in the path, promoting the linear and uniform extraction of fluid from the air tube, allowing the fan to operate stably. Support auxiliary structures such as springs, bearings, and air guide pads further stabilize the fan's position, preventing centrifugal vibrations of the fan from ultimately reacting to the rotating shaft and affecting the rotational efficiency of the rotating shaft. This significantly improves the fan's operating environment and enhances the overall efficiency of the blower. By optimizing the fan's operating environment, the stability of the blower is improved, and the service life of the blower is further extended. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic diagram of the internal structure of an embodiment of the present invention. [Figure 2] This is a cross-sectional view of an embodiment of the present invention. [Figure 3] This is a schematic diagram of the structure of an air guide pad according to an embodiment of the present invention. [Figure 4] This is a schematic diagram of the front structure of a fan according to an embodiment of the present invention. [Figure 5] This is a schematic diagram of the side structure of a fan according to an embodiment of the present invention. [Modes for carrying out the invention]

[0013] To further clarify the technical problems, technical solutions, and beneficial effects that this invention aims to solve, the invention will be described in more detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are used solely for interpreting the invention and do not limit it.

[0014] Furthermore, when a component is described as being "fixed" or "installed" to another component, it may be directly attached to the other component or indirectly attached to the other component. When a component is described as being "connected" to another component, it may be directly or indirectly connected to the other component.

[0015] It should be understood that the indicated directions or positional relationships of terms such as "length," "width," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" are based on the directions or positional relationships shown in the drawings and are used solely to facilitate and simplify the explanation of the present invention. They do not indicate or suggest that the shown devices or elements have a specific direction or must be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0016] Furthermore, the terms “first” and “second” are used solely to describe the purpose and cannot be understood as indicating or suggesting relative importance or implying the number of designated technical features. Thus, the features designated as “first” and “second” may explicitly or implicitly include one or more such features. In the description of this invention, “multiple” means two or more unless a particularly specific limitation is clearly stated.

[0017] The structure of a propeller fan is directly related to the aerodynamic performance of the fan, and this includes the common influence of multiple factors such as the distribution of design parameters between blades, dynamic and static blade interference, axial and radial clearances, and multiple vortex structures. Based on the above theory, this invention provides a small, sustained, high-speed fan.

Embodiment

[0018] A small-sized sustainable high-speed blower. Referring to FIG. 1, the stator module 1 is fixed, and the rotor module 2 is used to rotate the fan 4 at high speed. By optimizing the structure design of the air guide cylinder 3, that is, the air duct 3, the fluid is driven by the fan 4 and enters the air duct 3, generating a high pressure in the semi-closed space formed by the outer cylinder 31 and the inner cylinder 32 installed on the same central axis as the outer cylinder 31. The fluid enters from the air supply part 33 of the outer cylinder 31, is guided to the air exhaust part 34, and flows into the semi-closed space. Among them, a wind guide pad 35 is laid on the inner wall of the air supply part 33. The wind guide pad 35 reduces the air suction diameter of the outer cylinder 31. By adjusting the design ratio of the diameter of the impeller 41 and the length of the blades 42 in the fan 4, the fluid flow rate is maximally improved. With the outer cylinder 31 having a small air suction diameter, the fluid entering the air supply part 33 is subjected to a large pressure, thereby providing a large driving force for the subsequent flow of the fluid.

[0019] Referring to FIGS. 4 and 5, the length of the blades 42 directly affects the change in fluid flow rate at the same rotational speed, while the diameter of the impeller 41 directly affects the stability of the blades 42. Therefore, the two cooperate with each other and act jointly. Among them, the design ratio of the diameter of the impeller 41 and the length of the blades 42 directly affects the magnitude of the change in the driving fluid of the fan 4. When the diameter of the outer cylinder 31 is predetermined, an experiment is designed at the same rotational speed, and the ratio of the optimal diameter of the impeller 41 (unit: cm) to the length of the blades 42 (unit: cm) is designed to be 11:29.

[0020] The fluid enters the air exhaust part 34. At this time, it is necessary to appropriately relieve the flow velocity of the fluid, ensure the uniform relaxation of the fluid in the air exhaust part 34, that is, ensure that the subsequent wind speed is linear, uniform, and smooth, so that it can directly act on the human body and perform the air blowing operation.

[0021] The fluid that obtains a large amount of power flows out from the exhaust air part 34, is designed to be inclined outward in a flare shape near the exhaust air part 34 of the air supply part 33, and in accordance with the attachment of the inner cylinder 32 to the stator module 1, a guide space is provided for the high-speed flow of the fluid. Moreover, a plurality of uniformly distributed guide vanes 43 are connected and fixed between the exhaust air part 34 and the outer cylinder 31, and the guide space between the inner cylinder 32 and the outer cylinder 31 is evenly divided. By installing the guide vanes 43 in an arc plate airfoil shape, a path 37 is formed on the inner wall of the outer cylinder 31 to conduct the fluid in a curved manner between the outer wall of the inner cylinder 32 and the periphery of the adjacent guide vanes 43.

[0022] When the rotating shaft 21 rotates, the acting force direction of the centrifugal force always points to the center of the rotating shaft 21, and reacts in the axial direction of the rotating shaft 21 through the axial weight of the rotating shaft 21, causing bending deformation of the rotating shaft 21, that is, deflection occurs. Adding the installation of the end rotating bearing 22 of the rotating shaft 21 and the fan 4 makes the deformation of the rotating shaft 21 more serious, causing the fan 4 to swing left and right. When the inner diameter size of the outer cylinder 31 is specified, the movable space of the fan 4 is further restricted through the air guiding pad 35, reducing the deflection and improving the efficiency. Moreover, the rotating shaft 21 is a flexible shaft.

[0023] Under this condition, the rotating bearing 22, the first balance block 23, the second balance block 24 and the auxiliary bearing 25 are installed along the length direction of the rotating shaft 21 itself. By means of the auxiliary bearing 25 and the second balance block 24, the connection and attachment between the rotating shaft 21 and the stator module 1 are completed. The auxiliary bearing 25 and the second balance block 24 are synchronized with one end of the auxiliary support of the rotating shaft 21, and the other end is supported by the first balance block 23. Moreover, the first balance block 23, the second balance block 24 and the auxiliary bearing 25 support most of the length of the rotating shaft 21, improving the stability of the rotating shaft 21. The fan 4 is attached by the rotating bearing 22, and a spring 26 is fitted on the rotating shaft 21. The spring 26 elastically compresses to make the distance between the rotating bearing 22 and the first support shaft constant.

[0024] In addition to the circulation of the outer cylinder 31 and the compression of the inner cylinder 32, the arc-shaped guide vanes 43 can effectively reduce flow losses. The fan 4 has 13 blades 42, and the mounting angle of the blades 42 is adjusted sequentially, with an angle adjustment range of 20 to 30 degrees. An angle equalization test is performed with intervals of 0.5 degrees, and the magnitude of the flow rate inside the wind tube 3 is observed at different angles.

[0025] [Table 1]

[0026] Therefore, in order to ensure a high airflow within the air tube 3, the inclination angle range for mounting the blades 42 is determined to be between 20° and 30°, with 29.5° being the optimal angle.

[0027] After determining the inclination angle for mounting the blades 42, the inclination insertion angle of the guide vanes 43 was matched to the inclination angle for mounting the blades 42 in order to reduce the wind resistance coefficient inside the wind tube 3. With this configuration, tests were again conducted on the power, wind speed, rotational speed, and noise levels.

[0028] [Table 2] Note: This wind speed is the maximum wind speed directly tested by the anemometer at the exhaust section.

[0029] By improving the optimized design of the air tube 3, the wind resistance coefficient of the guide vane 43 can be reduced while ensuring a sufficient flow rate within the path 37. This promotes linear and uniform fluid flow through the air tube 3, allowing the fan 4 to operate stably. Support structures such as the spring 26, bearings, and air guide pad 35 further stabilize the position of the fan 4, preventing centrifugal vibrations of the fan 4 from ultimately reacting with the rotating shaft 21 and affecting the rotational efficiency of the rotating shaft 21. This significantly improves the operating environment of the fan 4, enhances the overall efficiency of the blower, improves the stability of the blower by optimizing the operating environment of the fan 4, and further extends the service life of the blower.

[0030] The above embodiments are merely interpretations of the present invention and do not limit it. Those skilled in the art may, after reading this specification, make modifications to these embodiments as necessary, without making any creative contributions, but any such modifications within the scope of the claims of the present invention are protected by patent law. [Explanation of symbols]

[0031] Stator module 1 Rotor module 2 Rotation axis 21 Rotary bearing 22 1st Balance Block 23 Second balance block 24 Auxiliary bearing 25 Spring 26 Wind tube 3 Outer cylinder 31 Inner cylinder 32 Air supply section 33 Air exhaust section 34 Air guide pad 35 Guide vane 36 Route 37 Incoming wind advance angle 38 Fan 4 Impeller 41 Feather 42

Claims

1. A small, sustained high-speed blower comprising a stator module, a rotor module that rotates on the stator module, a duct fitted into the stator module, and a fan module attached to the rotor, wherein the duct includes an outer cylinder and an inner cylinder installed on the same central axis as the outer cylinder, and the inner cylinder is fitted into the rotor module and fixed to the stator module. The outer cylinder has an air intake section and an air exhaust section distributed along its longitudinal direction, an air guide pad is laid on the inner wall of the air intake section, the air guide pad extends along the axial direction of the air cylinder, the air intake section flares outward near the air exhaust section, the diameter of the fan is slightly smaller than the diameter of the air guide pad, the air exhaust section extends linearly outward, a plurality of uniformly distributed guide vanes are connected and fixed between the air exhaust section and the outer cylinder, the guide vanes are installed in an arc-shaped blade form, the distance between adjacent guide vanes is always the same, a curved conductive path is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder and adjacent guide vanes, and the volume of adjacent paths is the same. A compact, sustained, high-speed blower characterized in that an air intake angle is provided on one side of the inner cylinder closest to the fan, and the inclination angle of the air intake angle matches the inclination angle of the air guide pad.

2. The rotor module includes a rotating shaft, the rotating shaft has a rotating bearing, a first balance block, a second balance block, and an auxiliary bearing installed along its longitudinal direction, the first balance block and the second balance block are installed at both ends of the rotating shaft to provide stable support, the auxiliary bearing is connected to the stator module, the fan is attached to the rotating bearing, a spring is connected between the rotating bearing and the first balance block, and the spring is fitted onto the rotating shaft, characterized in that the compact, sustained, high-speed blower according to claim 1.

3. The small, sustained, high-speed blower according to claim 2, characterized in that the fan includes an impeller mounted on the rotating bearing and blades uniformly distributed along the circumferential direction of the impeller, and the ratio of the diameter of the impeller to the length of the blades is 11:

29.

4. The small, sustained, high-speed blower according to claim 3, characterized in that the inclination angle of the blades matches the inclination angle of the guide vanes.

5. The small, sustained, high-speed blower according to claim 1, characterized in that the air guide pad is made of stainless steel, is attached to the inner wall of the outer cylinder, and limits the mounting space of the fan inside the air cylinder.

6. The small, sustained, high-speed blower according to claim 1, characterized in that the inclination angle range for mounting the blades is between 20° and 30°.

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