Double-support, quick-install thermal management variable diameter micro high-speed blower

Abstract

This high-speed blower equipment features a concentric double-support bearing design, effectively enhancing the operational stability of the rotor, suppressing vibration and noise, and improving the reliability of the equipment, based on a double-support, quick-installation structure. [Solution] The high-speed blower equipment based on a double-support, quick-install structure includes an outer shell unit 1 and an inner shell unit 2 that are coaxially fitted together, a motor 3 fixedly attached to the inner shell unit, and an impeller mounted on the output shaft end of the motor. The inner shell unit is provided coaxially inside the outer shell unit by a removable structure, and an annular airflow passage is formed between the two. Guide vanes 101 extending radially are uniformly distributed in the circumferential direction on the inner wall of the outer shell unit, and the inner edge ends of the guide vanes interlock with the outer wall of the inner shell unit, thereby enabling the outer shell unit and the inner shell unit to be assembled and fixed together.

Description

Technical Field

[0001] This application relates to the field of micro high-speed blowers, and particularly to a double-supported and quickly-installable thermal management variable-diameter micro high-speed blower.

Background Art

[0002] In the field of micro high-speed blower equipment technology, especially in applications with high requirements for all aspects of the compactness of the product volume, discharge air pressure, and discharge air volume, such as blower fans, high-pressure fans, portable large fans, etc., the micro high-speed blower is a core component to achieve high-performance output. In the prior art, a double-case structure composed of an outer shell and an inner shell is generally adopted. The inner shell fixes the motor, the impeller is directly attached to the output shaft of the motor, and guide vanes for always guiding the air flow are provided on the inner wall of the outer shell. In order to pursue miniaturization, the inner shell unit mostly uses a compact design of integral molding. Regarding the support of the motor rotor, due to spatial limitations, single-sided bearings or both-sided independent bearings with a simple structure are mostly used. The original purpose of such a design was to integrate the air passage and the power source within a limited space and meet the requirement of portability. However, the prior art exposes a series of drawbacks that restrict performance and the sense of use in actual applications. The root cause lies in the weak appropriateness of the structural design and the fact that the key performance bottleneck has not been effectively solved.

[0003] Specifically, conventional micro high-speed blower designs for the volume-sensitive products mentioned above have significant drawbacks. First, while the one-piece molded inner casing saves space, assembly and maintenance become extremely inconvenient. When maintenance or replacement of internal motor components is necessary, the device usually needs to be almost completely disassembled, which contradicts the user's convenience and the need for quick maintenance of small devices, significantly extending downtime and increasing the difficulty of operation. Second, in the process of miniaturization, the stability and precision of the rotor support system are sometimes ignored. Whether it is a cantilever support with a single bearing or a simple mounting of independent bearings on both sides with a loose structure, it is difficult to effectively suppress rotor yawing and vibration at high rotational speeds. This not only generates unpleasant noise but also significantly impairs the reliability of motor operation in a compact space and the stability of the airflow output from the impeller, making it difficult to meet the stringent requirements of a "high-pressure fan" for high air pressure output. Furthermore, heat dissipation becomes a key bottleneck. Effectively dissipating the heat generated by high-speed motors in compact spaces is difficult. Conventional designs involve creating convection holes of a predetermined diameter in the case for heat dissipation. However, this approach is insufficient during high-load operation, leading to excessive motor temperature increases, causing count reductions or failures. Conversely, excessive airflow at low loads can result in loss of air pressure efficiency. Conventional approaches cannot intelligently adapt to the dynamic demands of heat dissipation intensity required by actual operating conditions. Finally, the conventional design of equal-diameter straight-cylinder airflow channels also limits improvements in aerodynamic efficiency. Under the constraints of limited case size, there is a lack of mechanisms to effectively guide and accelerate airflow, making it difficult to achieve higher injection air pressure while guaranteeing large airflow volumes. This contradicts the demand for small devices that expect both large airflow (e.g., rapid drying) and high air pressure (e.g., styling airflow of a blower fan).

[0004] Therefore, research and development of new micro high-speed blowers, particularly applicable to compact space applications (e.g., cooling fans, high-pressure fans, portable large fans, etc.), has imminent practical significance and remarkable value. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] This invention aims to provide a double-support, quick-installation thermal management variable-diameter micro high-speed blower, with the goal of overcoming at least one defect present in the prior art. [Means for solving the problem]

[0006] To achieve the above objective, this application discloses a high-speed blower device based on a double-support, quick-installation structure, the device comprising a coaxially fitted outer shell unit and inner shell unit, a motor fixed to and attached to the inner shell unit, and an impeller attached to the output shaft end of the motor, wherein the inner shell unit is coaxially provided inside the outer shell unit by a removable structure, and an annular airflow passage is formed between the two. Guide vanes extending radially are uniformly distributed circumferentially on the inner wall of the outer shell unit, and the inner edge ends of the guide vanes interlock with the outer wall of the inner shell unit, thereby enabling the outer shell unit and inner shell unit to be assembled and fixed together. The inner shell unit employs a separate structure and consists of a main body base and a closing cover plate. The main body base includes an integrally molded arc-shaped receiving wall and concentric support cylinders at both axial ends, forming a semi-open motor housing area. The closing cover plate is detachably connected to the main body base by a pre-installed locking mechanism, and together they surround a sealed cylindrical housing chamber. The motor stator is fixed within the housing chamber, and both ends of the rotor's output shaft are supported by the concentric support cylinders on both sides, ensuring radial operational stability through the coaxial support structure.

[0007] Furthermore, an annular positioning flange is provided at the tail end of the outer wall of the inner shell unit. When the outer shell unit is fitted, the inner edge of the guide vane forms an interlocking fit with the outer wall of the inner shell unit. The fitting is completed when the positioning flange contacts the end face of the guide vane in the axial direction, thus achieving fitting.

[0008] Furthermore, the concentric support cylinder has a composite structure, consisting of a base layer, an elastic vibration damping layer, a cemented carbide carrier ring, and a self-lubricating graphite layer on its surface, all connected from the outside to the inside to an arc-shaped receiving wall.

[0009] Furthermore, the annular airflow passage is a tapered flow path, and the compression ratio is formed by the inlet cross-section and the outlet cross-section.

[0010] Furthermore, several heat dissipation through-holes are provided on the outer surface of the inner shell unit, and self-opening valve plates are attached to the heat dissipation through-holes. The self-opening valve plates include a rotating plate body and a nickel-titanium-based shape memory alloy drive piece. The rotating plate body is rotatably mounted by a rotating shaft within a bush in the side wall of the heat dissipation through-hole. One end of the nickel-titanium-based shape memory alloy drive piece is fixedly connected to the free end of the rotating plate body, and the other end is fixed to the inner shell unit. The shape memory alloy drive piece has a pre-stored torsional deformation angle of 90 degrees when installed at room temperature and closes the heat dissipation through-hole at room temperature.

[0011] Furthermore, the austenite transformation termination temperature of the nickel-titanium-based shape memory alloy drive piece is set to 75°C ± 1°C. When the temperature is lower than the transformation termination temperature, the rotating plate body maintains the closed position due to the torsional deformation energy stored in advance. When the temperature rises above the transformation termination temperature, the nickel-titanium-based shape memory alloy drive piece undergoes austenite transformation, causing deformation and driving the rotating plate body to rotate, thereby opening the heat dissipation through-hole. [Effects of the Invention]

[0012] Compared to the prior art, this invention has at least one beneficial technical effect.

[0013] 1. This invention contributes to industrial production by enabling the rapid installation and maintenance of internal components of equipment through a separate inner shell structure and a removable cover plate.

[0014] 2. This invention adopts a concentric double-sided support bearing design, which effectively enhances the operational stability of the rotor, suppresses vibration and noise, and improves the reliability of the equipment.

[0015] 3. This invention integrates intelligent self-opening and closing heat dissipation valves, which can dynamically adjust the heat dissipation through-holes in response to temperature changes, optimizing heat dissipation efficiency and reducing wind pressure loss.

[0016] The beneficial effects listed above do not encompass all possible advantages. Other potential beneficial effects and detailed embodiments of the technology are further presented in the embodiments and other descriptions of this application. [Brief explanation of the drawing]

[0017] After reading the following specific embodiments while referring to the drawings, you will be able to better understand many aspects of this application. The location, dimensions, and range of each structure shown in the drawings may not represent the actual location, dimensions, and range.

[0018] [Figure 1] This is a schematic diagram of the structure of one embodiment disclosed in this application. [Figure 2] This is a schematic diagram of the structure of the inner and outer shell units in a disassembled state in one embodiment disclosed in this application. [Figure 3] This is a schematic cross-sectional view of one embodiment disclosed in this application. [Figure 4] This is a schematic diagram of the structure of an inner shell unit in one embodiment disclosed in this application. [Figure 5] This is a schematic diagram of the exploded structure of the inner shell unit in one embodiment disclosed in this application. [Figure 6] This is a schematic diagram of the cross-sectional structure of a concentric support cylinder in one embodiment disclosed in this application. [Figure 7] This is a schematic diagram of the structure of a self-opening / closing valve plate in one embodiment disclosed in this application. [Figure 8] This is a schematic diagram of a partial cross-sectional structure of a heat dissipation through-hole in one embodiment disclosed in the present application, where the valve plate is in an open state.

Best Mode for Carrying Out the Invention

[0019] Hereinafter, the present application will be described with reference to the drawings, and several embodiments of the present application are shown in the drawings. However, it should be understood that the present application may be represented in various different forms and is not limited to the embodiments described below. In fact, the embodiments described below are intended to make the disclosure content of the present application more complete and to fully explain the protection scope of the present application to those skilled in the art. Further, it should be understood that the embodiments disclosed in this specification may be combined in various ways, thereby providing more embodiments.

[0020] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, for clarity, the dimensions of certain features may be deformed.

[0021] It should be understood that the terms in the specification are merely used to explain specific embodiments and are not intended to limit the present application. All terms used in the specification (including technical terms and scientific terms) have the meanings usually understood by those skilled in the art unless otherwise specified. For the sake of brevity and / or clarity, technologies, methods, and devices already known to those skilled in the art may not be described in detail, but when appropriate, the said technologies, methods, and devices should be regarded as part of the specification. [[ID=H16]]

[0022] The singular forms "a", "the", and "said" used in the specification include the plural form unless expressly stated otherwise. The terms "comprising", "having", and "containing" used in the specification indicate the presence of the recited features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the recited related items. <H16>

[0023] Referring to Figures 1 to 8, this embodiment provides an exemplary structure for a high-speed blower device based on a double-support, quick-install structure, which mainly comprises an outer shell unit 1 and an inner shell unit 2 fitted together coaxially, a motor 3 fixedly attached to the inner shell unit 2, and an impeller 4 mounted on the output shaft end of the motor 3. Here, the inner shell unit 2 is provided coaxially inside the outer shell unit 1 by a removable structure, and an annular airflow passage 5 is formed between the two.

[0024] Guide vanes 101 extending radially are uniformly distributed circumferentially on the inner wall of the outer shell unit 1, and the inner edges of the guide vanes 101 interlock with the outer wall of the inner shell unit 2 to form an interference fit. This allows the outer shell unit 1 and the inner shell unit 2 to be assembled and fixed together. This fitting method not only makes installation convenient but also ensures sealing and stability between the two units.

[0025] The inner shell unit 2 employs a separate structure and consists of a main body base 201 and a closing cover plate 202. The main body base 201 includes an integrally molded arc-shaped receiving wall 2011 and concentric support cylinders 2012 at both ends in the axial direction, forming a semi-open motor housing area. The closing cover plate 202 is detachably connected to the main body base 201 by a pre-installed locking mechanism, and together the two surround a sealed cylindrical housing chamber.

[0026] In motor 3, the motor stator is fixed within the housing chamber, and both ends of the rotor's output shaft are supported by concentric support cylinders 2012 on both sides. This coaxial structure effectively ensures the radial stability of the motor's operation, reduces vibration and noise, and improves the overall operating performance and service life of the blower.

[0027] Furthermore, an annular positioning flange is provided at the tail end of the outer wall of the inner shell unit 2. When the outer shell unit 1 is fitted, the inner edge of the guide vane 101 forms an interlocking fit with the outer wall of the inner shell unit 2, and the fitting completion criterion is established until the positioning flange contacts the end face of the guide vane 101 in the axial direction. This enables precise, rapid, and reliable fitting, improving fitting efficiency and quality.

[0028] In this embodiment, the concentric support cylinder 2012 is a composite structure consisting of a base layer 2013, an elastic vibration damping layer 2014, a cemented carbide carrier ring 2015, and a self-lubricating graphite layer 2016 on its surface, connected sequentially from the outside to the inside to an arc-shaped receiving wall. The base layer 2013 provides basic structural strength to the support cylinder, the elastic vibration damping layer 2014 effectively absorbs vibrations generated during motor operation and plays a role in reducing vibration and noise, the cemented carbide carrier ring 2015 has high hardness and wear resistance and can withstand the rotational friction force of the rotor's output shaft, extending the service life of the support cylinder. The self-lubricating graphite layer 2016 on the surface reduces the coefficient of friction, decreases rotational resistance, avoids wear due to poor lubrication, and ensures stable operation of the motor rotor.

[0029] In this high-speed blower device, the annular airflow passage 5 is designed as a tapered flow path, with a large inlet cross-sectional area and a relatively small outlet cross-sectional area, thereby creating a predetermined compression ratio between the inlet and outlet. When airflow enters the annular airflow passage, the cross-sectional area of ​​the passage gradually decreases, causing the airflow to be slightly compressed, and the airflow pressure increases accordingly.

[0030] After the airflow has been slightly compressed, when it reaches the outlet of the annular airflow passage 5 and is discharged from the blower, the compression effect that had been limiting the volume of the airflow is released. In this case, the gas rapidly returns to its original volume due to the action of the pressure gradient. This restoration process is accompanied by a significant increase in the kinetic energy of the gas molecules, further increasing the airflow velocity.

[0031] Due to the tapered flow path design described above, this device can achieve an additional acceleration effect by utilizing the natural recovery process of gas volume after the airflow is discharged from the blower. Such a design not only improves the aerodynamic efficiency of the blower, but also results in a higher flow velocity for the discharged gas.

[0032] Furthermore, several heat dissipation through-holes 203 are provided on the outer surface of the inner shell unit 2. A self-opening valve plate 204 is attached to each heat dissipation through-hole 203, and the self-opening valve plate 204 includes a rotating plate body 2041 and a nickel-titanium-based shape memory alloy drive piece 2042. The rotating plate body 2041 is rotatably mounted by a rotating shaft within a bush in the side wall of the heat dissipation through-hole 203 and can rotate flexibly to control the open and closed state of the heat dissipation through-hole 203. One end of the nickel-titanium-based shape memory alloy drive piece 2042 is fixedly connected to the free end of the rotating plate body 2041, and the other end is fixed to the inner shell unit 2. The memory alloy drive piece has a pre-stored torsional deformation angle of 90 degrees when installed at room temperature and maintains the heat dissipation through-hole 203 in a closed state, preventing foreign matter such as dust from entering the inside of the inner shell unit 2 and affecting the normal operation of the motor.

[0033] When the internal temperature of the inner shell unit 2 rises and reaches the austenite transformation termination temperature of the nickel-titanium-based shape memory alloy drive piece 2042 (set to 75°C ± 1°C), the memory alloy drive piece undergoes an austenite transformation, causing deformation and driving the rotating plate body 2041 to rotate. This opens the heat dissipation through-hole, allowing the heat inside the inner shell unit 2 to be dissipated through the heat dissipation through-hole 203, thus realizing an automatic heat dissipation function. When the temperature drops below the transformation termination temperature, the drive piece returns to its original state, drives the rotating plate body 2041 back to the closed position, and closes the heat dissipation through-hole 203 again, maintaining a stable environment inside the inner shell unit 2. This self-opening and closing valve plate design allows for intelligent adjustment of the opening and closing of the heat dissipation through-hole 203 according to actual temperature changes, eliminating the need for human intervention and effectively improving the intelligence level and operational reliability of the blower equipment.

[0034] In this example, a high-speed blower device based on a double-support, quick-installation structure is applied to ventilation and heat dissipation systems in industrial production. In the initial stages when the device is started up and the motor is operating, the amount of heat generated is relatively small because the motor has just started, and the internal temperature of the inner shell unit 2 is relatively low. At this time, the self-opening valve plate 204 is in a normally-off state, effectively preventing foreign matter such as dust from entering the inside of the inner shell unit 2, while also avoiding unnecessary heat dissipation and ensuring the maximum blower efficiency. This design cleverly combines the actual needs of different operating stages of the machine, achieving a balance between heat dissipation and energy saving.

[0035] As the motor operates continuously, heat gradually accumulates inside, causing the temperature to rise slowly. When the temperature approaches 75°C, the memory alloy drive piece responds to the temperature change and undergoes an austenitic transformation. This transformation drives the rotating plate 2041 to resist the pre-stored torsional deformation angle, causing it to rotate and open the heat dissipation through-hole 203. The airflow then passes through the heat dissipation through-hole 203, efficiently removing heat from inside the inner shell unit 2. This effectively prevents failures caused by motor overheating and ensures stable continuous operation of the blower equipment.

[0036] In practical applications, this self-operating heat dissipation design demonstrates significant advantages over conventional fixed heat dissipation structures. Conventional structures suffer from either wasted energy due to continuous heat dissipation or an inability to respond quickly when heat dissipation is needed. On the other hand, the self-operating valve plate 204 of this design can intelligently adjust the heat dissipation effect based on the actual temperature demand. When heat dissipation is not needed, the valve plate remains closed, not only preventing the entry of foreign matter such as dust, but also reducing the frequency of maintenance and improving the discharge efficiency of the blower. With such an intelligent design, the blower equipment ensures heat dissipation performance while simultaneously achieving energy savings and long-term equipment stability, providing a more efficient and reliable solution for ventilation heat dissipation systems in industrial production.

[0037] As described above, this high-speed blower equipment based on a double-support, quick-installation structure achieves convenient installation, stable operation, efficient aerodynamic performance, and intelligent heat dissipation function through the skillful design and rational cooperation of each component. It is widely applicable to various industrial scenes requiring high-speed airflow and provides a high-performance, reliable, and practical blower equipment solution to related fields.

[0038] While exemplary embodiments of this application have been described, it is to be understood by those skilled in the art that various changes and modifications can be made to these exemplary embodiments, provided that they do not substantially deviate from the spirit and scope of this application. Accordingly, all changes and modifications shall fall within the scope of protection of this application, as defined by the claims. This application is limited to the claims and also includes equivalents of these claims.

Claims

1. A high-speed blower device based on a double-support, quick-installation structure, comprising a coaxially fitted outer shell unit and inner shell unit, a motor fixed to and attached to the inner shell unit, and an impeller mounted on the output shaft end of the motor, wherein the inner shell unit is coaxially provided inside the outer shell unit by a removable structure, and an annular airflow passage is formed between the two. Guide vanes extending radially are uniformly distributed circumferentially on the inner wall of the outer shell unit, and the inner edge ends of the guide vanes interlock with the outer wall of the inner shell unit, thereby enabling the outer shell unit and inner shell unit to be assembled and fixed together. The inner shell unit employs a separate structure and consists of a main body base and a closing cover plate. The main body base includes an integrally molded arc-shaped receiving wall and concentric support cylinders at both axial ends thereof, forming a semi-open motor housing area. The closing cover plate is detachably connected to the main body base by a pre-installed locking mechanism. Together, the two surround a sealed cylindrical housing chamber, the motor stator is fixed within the housing chamber, and both ends of the rotor's output shaft are supported by the concentric support cylinders on either side. A high-speed blower device based on a double-support, quick-installation structure, characterized in that several heat dissipation through-holes are provided on the outer surface of the inner shell unit, a self-opening valve plate is attached to the heat dissipation through-holes, the self-opening valve plate includes a rotating plate body and a nickel-titanium-based shape memory alloy drive piece, the rotating plate body is rotatably mounted by a rotating shaft within a bush in the side wall of the heat dissipation through-hole, one end of the nickel-titanium-based shape memory alloy drive piece is fixedly connected to the free end of the rotating plate body, and the other end is fixed to the inner shell unit, the memory alloy drive piece has a pre-stored torsional deformation angle of 90 degrees in a room-temperature mounting state and closes the heat dissipation through-hole at room temperature.

2. A high-speed blower device based on the double-support, quick-installation structure according to claim 1, characterized in that an annular positioning flange portion is provided at the tail end of the outer wall of the inner shell unit.

3. The high-speed blower equipment based on the double support and quick-installation structure according to claim 1, characterized in that the concentric support cylinder has a composite structure and comprises a base layer, an elastic vibration damping layer, a cemented carbide carrier ring, and a self-lubricating graphite layer on its surface, all connected from the outside to the inside to an arc-shaped receiving wall.

4. The high-speed blower equipment based on the double-support and quick-installation structure according to claim 1, characterized in that the annular airflow passage is a tapered flow path and a compression ratio is formed between the inlet cross-section and the outlet cross-section.

5. The austenite transformation termination temperature of the nickel-titanium-based shape memory alloy drive piece is set to 75°C ± 1°C. When the temperature is lower than the transformation termination temperature, the rotating plate body is maintained in the closed position by the torsional deformation energy stored in advance. When the temperature rises above the transformation termination temperature, the nickel-titanium-based shape memory alloy drive piece undergoes an austenite transformation, causing deformation and driving the rotating plate body to rotate, thereby opening the heat dissipation through-hole, as described in claim 1 for high-speed blower equipment based on a double-support, quick-installation structure.

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