An energy-saving fan with high-efficiency heat dissipation function

Abstract

This invention discloses an energy-saving fan with high-efficiency heat dissipation, comprising a main cylinder and a heat dissipation cylinder fixedly mounted at the center of the main cylinder via a connecting arm. The connecting arm is a hollow structure used to connect the interior of the heat dissipation cylinder and the exterior of the main cylinder. A motor is fixedly inserted into the heat dissipation cylinder, with its output end extending out of the heat dissipation cylinder and connected to a fan impeller. Guide vanes are fixedly mounted on the exterior of the heat dissipation cylinder, perpendicular to the connecting arm. By placing the motor within an independent heat dissipation cylinder and fixing it to the center of the main cylinder via the hollow connecting arm, the area directly exposed to the high-temperature main airflow and heat transfer are significantly reduced, effectively lowering the motor's operating temperature and improving its operational reliability and lifespan. Simultaneously, the hollow connecting arm can transfer heat to the outside of the main cylinder, further improving heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of ventilation technology, and in particular to an energy-saving fan with efficient heat dissipation function. Background Technology

[0002] Fans are indispensable key equipment in high-temperature environments in industrial fields (such as heat treatment furnaces and hot air circulation systems in industries like metallurgy, chemical engineering, power generation, and building materials) for transporting high-temperature gases. In traditional fan designs, the motor is usually directly exposed in the main airflow channel or protected only by a simple heat shield. This approach has limited effectiveness under extreme temperatures. Poor motor heat dissipation can lead to accelerated insulation aging, decreased efficiency, bearing lubrication failure, and even burnout, seriously threatening the fan's operational reliability and service life.

[0003] To protect the motor, some designs attempt to isolate the motor section or install external cooling ducts. However, these external cooling structures (such as additional air-cooled ducts or enclosures) often need to pass through the main air intake area or near the airflow path of the fan. This layout can interfere with the main airflow, generate eddies, and increase drag, thereby significantly reducing the fan's overall aerodynamic efficiency, airflow, and pressure performance. Summary of the Invention

[0004] The purpose of this invention is to overcome the problem of poor heat dissipation of existing fans and to provide an energy-saving fan with efficient heat dissipation function.

[0005] An energy-saving fan with high-efficiency heat dissipation function, including

[0006] Main cylinder,

[0007] The heat dissipation cylinder is fixedly installed at the center of the main cylinder via a connecting arm; the connecting arm is a hollow structure used to connect the interior of the heat dissipation cylinder and the exterior of the main cylinder.

[0008] The motor is fixedly inserted into the heat dissipation cylinder, and the output end of the motor passes through the heat dissipation cylinder and is connected to a fan impeller.

[0009] The guide vanes are fixedly installed on the outside of the heat dissipation cylinder and are perpendicular to the connecting arm.

[0010] Furthermore, a cooling assembly is provided inside the heat dissipation cylinder; the cooling assembly includes a spiral portion surrounding the outside of the motor, and the inlet end and outlet end of the spiral portion are respectively connected to an inlet pipe and an outlet pipe; the inlet pipe and the outlet pipe pass through two connecting arms and are connected to an external cold source.

[0011] Furthermore, an air guide hood is fixedly installed at the rear end of the main cylinder. The air guide hood includes a constriction section and a straight section. The surface of the constriction section is uniformly provided with rapid air guide grooves.

[0012] Furthermore, the rapid air guide channel is configured as a strip-shaped channel arranged at an inclination angle of 15°.

[0013] Furthermore, the rapid air guide groove is composed of multiple air guide units connected end to end in an alternating manner; the air guide unit includes an arc-shaped groove and a straight groove; wherein the middle part of the straight groove in the previous air guide unit is connected to the arc-shaped groove in the next air guide unit, and the lower part of the straight groove in the previous air guide unit is connected to the middle part of the straight groove in the next air guide unit.

[0014] Furthermore, a non-powered fan is fixedly fitted inside the straight section.

[0015] Furthermore, the non-powered fan includes a circular frame, inside which a support arm is provided; a bearing assembly is provided in the middle of the support arm; a rotating shaft is provided through the middle of the bearing assembly; and non-powered blades are sleeved on the rotating shaft.

[0016] Furthermore, the connecting arm is configured to be flat, with the arc-shaped section facing the air inlet; the guide vanes are configured to be obliquely curved.

[0017] Furthermore, a support is detachably provided at the bottom of the main cylinder.

[0018] The beneficial effects of this invention are:

[0019] 1. By placing the motor inside an independent heat dissipation cylinder and fixing it to the center of the main cylinder via a hollow connecting arm, the area directly exposed to the high-temperature main airflow and heat transfer are significantly reduced, effectively lowering the motor's operating temperature and improving its operational reliability and lifespan. Simultaneously, the hollow connecting arm can transfer heat to the outside of the main cylinder, further improving heat dissipation efficiency.

[0020] 2. The guide vanes, located outside the heat dissipation cylinder and perpendicular to the connecting arm, can effectively streamline the airflow passing through the heat dissipation cylinder and connecting arm area, reduce the generation of eddies, and significantly reduce the resistance to the main airflow, thereby maintaining the overall high aerodynamic efficiency and performance of the fan.

[0021] 3. By incorporating a cooling assembly surrounding the motor within the heat sink, particularly the spiral section, active and efficient cooling of the motor is achieved through circulating cooling media. This results in a large heat exchange area and a cooling effect far superior to passive cooling, significantly enhancing the motor's adaptability and long-term operational stability under extreme high-temperature environments. Simultaneously, the inlet and outlet pipes are cleverly integrated within the hollow connecting arm, completely avoiding interference and obstruction of the main airflow channel by traditional external cooling pipes, ensuring that the fan's aerodynamic performance remains unaffected. The introduction and discharge paths of the cooling media are concealed and highly efficient.

[0022] 4. An air guide hood is installed at the rear end of the main cylinder. The structure of its contraction and straight sections can effectively guide the airflow, reducing or even eliminating the backflow or vortex zone of high-temperature gas at the rear of the fan. At the same time, the rapid air guide groove design can generate a specific flow effect on the surface of the contraction section of the air guide hood, significantly accelerating the export speed of high-temperature gas, further optimizing the flow field distribution inside the fan, improving efficiency, and reducing the accumulation of heat at the rear of the fan.

[0023] 5. A passive fan is embedded in the straight section of the air guide shroud, and the passive blades are passively driven to rotate by the flow of the main airflow. The rotating blades can further disperse any possible small vortices, promoting smoother airflow. On the other hand, the disturbance generated by their rotation helps to enhance airflow in the area near the motor, aiding in heat dissipation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the wind turbine;

[0025] Figure 2 This is a schematic diagram of the internal structure of the fan;

[0026] Figure 3 A schematic diagram of the main cylinder structure;

[0027] Figure 4 This is a schematic diagram of the cooling component structure;

[0028] Figure 5 This is a schematic diagram of the air guide shroud structure;

[0029] Figure 6 This is a schematic diagram of a non-powered fan structure;

[0030] Figure 7 This is a schematic diagram of the rapid air guide channel structure;

[0031] In the diagram, 1-main cylinder, 11-support, 2-heat dissipation cylinder, 21-drain hole, 3-connecting arm, 4-guide vane, 5-motor, 6-fan impeller, 7-cooling assembly, 71-spiral section, 72-inlet pipe, 73-outlet pipe, 8-air guide shroud, 800-rapid air guide groove, 801-arc groove, 802-straight groove, 9-non-powered fan, 91-circular frame, 92-support arm, 93-bearing kit, 94-shaft, 95-non-powered blade. Detailed Implementation

[0032] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Example 1

[0035] like Figures 1-7 As shown, an energy-saving fan with efficient heat dissipation function includes a main cylinder 1, the main body of which is made of high-temperature resistant alloy steel. The main cylinder 1 is a cylindrical shape with an open front end, and a steel support 11 is detachably installed at its bottom by bolts, which facilitates installation and maintenance.

[0036] The heat dissipation cylinder 2 is fixedly installed at the center of the main cylinder 1 via connecting arms 3. The heat dissipation cylinder 2 is a cylindrical structure, and is horizontally welded to the center of the inner wall of the main cylinder 1 by two flat, hollow connecting arms 3. The arc-shaped concave surface of the connecting arms 3 faces precisely towards the air inlet of the main cylinder 1 to reduce air intake resistance. At the same time, the hollow connecting arms 3 allow the interior of the heat dissipation cylinder 2 to communicate with the exterior of the main cylinder 1, facilitating airflow and achieving the purpose of heat dissipation.

[0037] Motor 5 is fixedly inserted into the heat sink 2. The output end of motor 5 extends out of the heat sink 2 and is connected to a fan impeller 6. Specifically, motor 5 is fastened to the flange by interference fit and fixedly inserted into the central cavity of the heat sink 2. The motor shaft extends forward through the front end cover of the heat sink 2 and drives the fan impeller 6 through a coupling.

[0038] The guide vanes 4 are fixedly installed on the outside of the heat dissipation cylinder 2, perpendicular to the connecting arm 3. Specifically, multiple guide vanes 4 are precision stamped from high-temperature alloy steel plates into obliquely curved airfoils, uniformly welded to the outer surface of the heat dissipation cylinder 2, and the extension direction of the vanes is perpendicular to the axis of the adjacent connecting arm 3. Their function is to guide the airflow smoothly around the heat dissipation cylinder 2 and the connecting arm 3.

[0039] The cooling cylinder 2 is equipped with a cooling assembly 7, specifically within the annular space between the inner wall of the cooling cylinder 2 and the outer casing of the motor 5. The cooling assembly 7 includes a spiral section 71 surrounding the outside of the motor 5, which is a copper spiral coil. The inlet and outlet ends of the spiral section 71 are respectively connected to an inlet pipe 72 and an outlet pipe 73. The inlet pipe 72 and the outlet pipe 73 pass through two different hollow connecting arms 3 and extend to the outside of the main cylinder 1, connecting to an external circulating coolant system via quick-connect couplings. Furthermore, to prevent water accumulation in the spiral section 71 during cooling, a drain hole 21 is provided at the bottom of the cooling cylinder 2.

[0040] A gas guide hood 8 is also fixedly installed at the rear end of the main cylinder 1. Specifically, the gas guide hood 8 is a conical gas guide hood, which is integrally formed from a front flared constriction section 81 and a rear cylindrical straight section 82. On the inner conical surface of the constriction section 81, rapid gas guide grooves 800 are uniformly machined by precision casting or additive manufacturing processes.

[0041] In this design, the rapid air guide groove 800 is designed in two ways. One is that the air guide groove is a straight strip extending at a 15° angle along the generatrix of the conical surface. The other is that the air guide groove is composed of multiple staggered "units" connected together. Each unit includes: an arc-shaped groove 801 and a straight strip groove 802 connected to the middle of the arc-shaped groove. Specifically, in adjacent units, the end of the straight groove 802 of the preceding unit connects to the starting point of the arc-shaped groove 801 of the following unit, forming a continuous air guide path.

[0042] To further increase cooling efficiency when not in operation, a high-temperature resistant engineering plastic non-powered fan 9 is embedded at the end of the straight section 82 of the air guide shroud 8. The non-powered fan 9 includes a circular frame 91, inside which a support arm 92 is provided; a bearing assembly 93 is provided in the middle of the support arm 92; a rotating shaft 94 passes through the middle of the bearing assembly 93; and non-powered blades 95 are sleeved on the rotating shaft 94.

[0043] The working process of this fan:

[0044] Airflow intake and initial guidance: High-temperature gas is drawn in from the front end of the main cylinder 1. The airflow first encounters the guide vanes 4, which organize the airflow into a uniform spiral flow, preventing the generation of separation vortices behind the heat dissipation cylinder 2 and the connecting arm 3, and significantly reducing flow resistance. The flat connecting arm 3 further reduces obstruction to the airflow.

[0045] Active cooling of the motor: An external cold source, such as 20°C cooling water, flows into the spiral section 71 through the inlet pipe 72 → the inner channel of the connecting arm 3. The cooling water flows in the tightly coiled spiral tube, efficiently absorbing the heat emitted by the motor 5 casing. The heated cooling water then returns to the external system for circulation through the outlet pipe 73 → another connecting arm 3.

[0046] Impeller work and gas acceleration: The guided airflow drives the fan impeller 6 to rotate at high speed, giving the gas kinetic and pressure energy, accelerating it towards the rear end of the main cylinder 1. When the high-pressure airflow reaches the air guide shroud 8 area, the conical structure guides the airflow to contract smoothly and accelerate, avoiding the formation of backflow zones at the corners. The rapid air guide groove 800 generates an attached-wall jet effect, accelerating the discharge of boundary layer gas and preventing separation; at the same time, it induces micro-vortices within the groove, enhancing radial mixing of the gas, disrupting large-scale backflow vortices, and significantly reducing pressure loss.

[0047] When the high-speed airflow passes through the straight section 82, it drives the unpowered blades 95 to rotate at high speed. The rotating blades further disperse the residual vortices, making the airflow more evenly discharged.

[0048] In this scheme, during the cooling process described above, a local low-pressure zone is simultaneously generated at the rear end of the heat dissipation cylinder 2, drawing in a small amount of airflow through the hollow channel of the connecting arm 3 to form auxiliary air cooling and enhance heat dissipation.

[0049] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An energy-saving fan with high-efficiency heat dissipation function, characterized in that: The utility model relates to a high -efficient cooling device of motor, including Main cylinder (1), The heat dissipation cylinder (2) fixedly arranged at the center of main cylinder (1) through connecting arm (3), the connecting arm (3) is arranged as hollow structure, is used to communicate the inside of heat dissipation cylinder (2) and the outside of main cylinder (1), Motor (5) is fixedly inserted and arranged in heat dissipation cylinder (2), and the output end of motor (5) passes out heat dissipation cylinder (2) and is connected with fan impeller (6) setting, The guide vane (4) is fixedly arranged outside heat dissipation cylinder (2) and is perpendicular to connecting arm (3), The heat dissipation cylinder (2) is provided with cooling assembly (7) inside, and the cooling assembly (7) includes spiral part (71) arranged outside motor (5), and the inlet end and outlet end of spiral part (71) are communicated with liquid inlet pipe (72) and liquid outlet pipe (73) setting respectively, liquid inlet pipe (72) and liquid outlet pipe (73) pass through from two connecting arms (3) respectively and are communicated with external cold source, The rear end of main cylinder (1) is also fixedly provided with gas guide cover (8), and the gas guide cover (8) includes contraction part (81) and straight part (82), the surface of contraction part (81) is uniformly provided with quick gas guide groove (800), The quick gas guide groove (800) is composed of a plurality of gas guide units connected in head-to-tail staggered mode, the gas guide unit includes arc-shaped groove (801) and straight groove (802), the middle part of straight groove (802) in the previous gas guide unit is communicated with arc-shaped groove (801) in the next gas guide unit, and the lower part of straight groove (802) in the previous gas guide unit is communicated with the middle part of straight groove (802) in the next gas guide unit.

2. The energy-saving fan with high-efficiency heat dissipation function according to claim 1, characterized in that: The non-powered fan (9) is fixedly embedded in the straight part (82).

3. The energy-saving fan with high-efficiency heat dissipation function according to claim 2, characterized in that: The non-powered fan (9) includes circular frame body (91), the circular frame body (91) is provided with support arm (92) inside, the middle part of support arm (92) is provided with bearing sleeve (93), the middle part of bearing sleeve (93) is provided with rotating shaft (94), and the non-powered blade (95) is sleeved on the rotating shaft (94).

4. The energy-saving fan with high-efficiency heat dissipation function according to claim 1, characterized in that: The connecting arm (3) is arranged as flat, and the arc-shaped section faces the air inlet, the guide vane (4) is arranged as inclined curved structure.

5. The energy-saving fan with high-efficiency heat dissipation function according to claim 1, characterized in that: The bottom of main cylinder (1) is detachably provided with support (11).

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