Energy-saving fan with efficient heat dissipation function

Abstract

The invention discloses an energy-saving fan with an efficient heat dissipation function. The energy-saving fan comprises a main barrel and a heat dissipation barrel fixedly arranged at the center of the main barrel through a connecting arm. The connecting arm is of a hollow structure and is used for communicating the interior of the heat dissipation barrel with the exterior of the main barrel; the motor is fixedly inserted into the heat dissipation barrel, and the output end of the motor penetrates out of the heat dissipation barrel and is connected with a fan impeller; and the guide vanes are fixedly arranged outside the heat dissipation barrel and are perpendicular to the connecting arms. The motor is arranged in the independent heat dissipation barrel and is fixed in the center of the main barrel through the hollow connecting arm, so that the area and heat transfer of the motor directly exposed in high-temperature main airflow are remarkably reduced, the working temperature of the motor is effectively reduced, the operation reliability of the motor is improved, and the service life of the motor is prolonged. And meanwhile, the hollow connecting arms can transfer heat out of the main barrel body, so that the heat dissipation efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation, in particular to an energy-saving fan with a high-efficiency heat dissipation function. Background Art

[0002] Fans are essential, critical equipment used to transport high-temperature gases in high-temperature industrial environments, such as heat treatment furnaces and hot air circulation systems in the metallurgical, chemical, power, and building materials industries. Traditional fan designs often expose the motor directly to the main airflow path or rely solely on a simple heat shield for protection. This approach is ineffective in extremely high temperatures, and poor heat dissipation from the motor can lead to accelerated insulation aging, reduced 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 partially isolate the motor or provide external cooling ducts. However, these external cooling structures (such as additional cooling ducts or enclosures) often pass through the fan's main air inlet area or near the airflow path. This arrangement disrupts the main airflow, generating vortices and increasing drag, significantly reducing the fan's overall aerodynamic efficiency, airflow, and pressure performance. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problem of poor heat dissipation effect 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, comprising

[0006] Main cylinder,

[0007] The heat dissipation cylinder is fixed at the center of the main cylinder by a connecting arm; the connecting arm is configured as a hollow structure for connecting the interior of the heat dissipation cylinder and the exterior of the main cylinder;

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

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

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

[0011] Furthermore, an air guide hood is fixedly provided at the rear end of the interior of the main cylinder, and the air guide hood includes a contraction portion and a straight portion; and rapid air guide grooves are evenly provided on the surface of the contraction portion.

[0012] Furthermore, the rapid air guide groove is configured to be a strip groove arranged at an inclined angle of 15°.

[0013] Furthermore, the rapid air guide groove is composed of multiple air guide units connected end to end; the air guide unit includes an arc groove and a straight groove; the middle part of the straight groove in the previous air guide unit is connected to the arc 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, an unpowered fan is fixedly embedded in the straight portion.

[0015] Furthermore, the unpowered fan includes a circular frame, a support arm is provided inside the circular frame; a bearing kit is provided in the middle of the support arm; a rotating shaft is provided through the middle of the bearing kit; and an unpowered blade is sleeved on the rotating shaft.

[0016] Furthermore, the connecting arm is configured to be flat, with the arc section facing the air inlet; and the guide blade is configured to be an obliquely curved structure.

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

[0018] The beneficial effects of the present invention are:

[0019] 1. By placing the motor in a separate heat dissipation cylinder and securing it to the center of the main cylinder via a hollow connecting arm, the motor's direct exposure to the high-temperature main airflow and heat transfer are significantly reduced, effectively lowering the motor's operating temperature and improving its reliability and lifespan. Furthermore, the hollow connecting arm transfers heat outside the main cylinder, further improving heat dissipation efficiency.

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

[0021] 3. By installing a cooling assembly surrounding the motor within the heat dissipation cylinder, particularly the spiral portion, the motor is actively and efficiently cooled by circulating cooling medium. This provides a large heat exchange area and achieves cooling results far superior to passive cooling, significantly enhancing the motor's adaptability and long-term operational stability in extreme high-temperature environments. Furthermore, the inlet and outlet pipes are cleverly integrated within the hollow connecting arm, completely eliminating the interference and obstruction of traditional external cooling piping on the main airflow path, ensuring uncompromising aerodynamic performance. The cooling medium introduction and discharge paths are discreet and efficient.

[0022] 4. An air guide hood is set at the rear end of the main cylinder. The structure of its contraction and flat parts can effectively guide the airflow, reduce or even eliminate the high-temperature gas backflow or vortex zone at the rear of the fan; at the same time, the rapid air guide groove design can produce a specific flow effect on the surface of the contraction part of the air guide hood, significantly accelerating the discharge speed of the high-temperature gas, further optimizing the flow field distribution inside the fan, improving efficiency, and reducing heat accumulation at the rear of the fan.

[0023] 5. A non-powered fan is embedded in the straight portion of the air duct, using the main airflow to passively drive the rotation of the non-powered blades. The rotating blades further break up any small vortices, promoting smoother airflow. Furthermore, the disturbance created by their rotation helps enhance air flow near the motor, aiding heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall structure of the fan;

[0025] Figure 2 Schematic diagram of the internal structure of the fan;

[0026] Figure 3 This is a schematic diagram of the main cylinder structure;

[0027] Figure 4 Schematic diagram of the cooling component structure;

[0028] Figure 5 Schematic diagram of the air guide cover structure;

[0029] Figure 6 It is a schematic diagram of the structure of an unpowered fan;

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

[0031] In the figure, 1-main cylinder, 11-support, 2-heat dissipation cylinder, 21-drainage hole, 3-connecting arm, 4-guide blade, 5-motor, 6-fan impeller, 7-cooling assembly, 71-spiral part, 72-liquid inlet pipe, 73-liquid outlet pipe, 8-air guide cover, 800-quick air guide groove, 801-arc groove, 802-straight groove, 9-unpowered fan, 91-circular frame, 92-support arm, 93-bearing kit, 94-rotating shaft, 95-unpowered blade. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention through specific examples. 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. The 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 the following embodiments and features in the embodiments can be combined with each other unless they conflict.

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

[0034] Example 1

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

[0036] The heat dissipation cylinder 2, located at the center of the main cylinder 1, is secured by connecting arms 3. The heat dissipation cylinder 2 is a cylindrical structure, secured horizontally to the center of the inner wall of the main cylinder 1 by two flat, hollow connecting arms 3. The curved, concave surfaces of the connecting arms 3 face the air inlet of the main cylinder 1 to minimize air intake resistance. Furthermore, the hollow connecting arms 3 connect the interior of the heat dissipation cylinder 2 with the exterior of the main cylinder 1, facilitating air flow and achieving heat reduction.

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

[0038] Guide vanes 4 are fixedly mounted on the exterior of the heat sink cylinder 2, perpendicular to the connecting arm 3. Specifically, multiple guide vanes 4 are precision-stamped from high-temperature alloy steel sheets into obliquely curved airfoils and uniformly welded to the exterior of the heat sink cylinder 2. The vanes extend perpendicular to the axis of the adjacent connecting arm 3. Their function is to guide airflow smoothly around the heat sink cylinder 2 and connecting arm 3.

[0039] A cooling assembly 7 is provided inside the heat dissipation cylinder 2, specifically in the annular space between the inner wall of the heat dissipation cylinder 2 and the outer shell of the motor 5. The cooling assembly 7 includes a spiral portion 71 arranged around the outside of the motor 5, and the spiral portion 71 is configured as a copper spiral coil. The inlet and outlet ends of the spiral portion 71 are connected to a liquid inlet pipe 72 and a liquid outlet pipe 73, respectively. The two pipes of the liquid inlet pipe 72 and the liquid outlet pipe 73 pass through the inside of two different hollow connecting arms 3 and extend to the outside of the main cylinder 1, and are connected to the external circulating coolant system through a quick-change joint. Furthermore, in order to prevent water from accumulating when the spiral portion 71 is cooled, a drainage hole 21 is provided at the bottom of the heat dissipation cylinder 2.

[0040] An air guide hood 8 is fixedly mounted on the rear end of the main cylinder 1. Specifically, the air guide hood 8 is a conical air guide hood formed integrally with a front bell-shaped contraction portion 81 and a rear cylindrical straight portion 82. Rapid air guide grooves 800 are uniformly machined on the inner conical surface of the contraction portion 81 through precision casting or additive manufacturing.

[0041] In this solution, the rapid air guide groove 800 is designed in two ways. One is a linear strip extending along the cone's generatrix at a 15° angle. The other is a strip formed by connecting multiple "units" staggered end to end. Each unit includes an arcuate groove 801 and a straight strip groove 802 connected to the center of the arcuate groove. Specifically, in adjacent units, the end of the straight groove 802 of the previous unit connects to the starting point of the arcuate groove 801 of the next unit, forming a continuous air guide path.

[0042] To further increase cooling efficiency when not in operation, a non-powered fan 9 made of high-temperature-resistant engineering plastic is embedded at the end of the straight portion 82 of the air duct 8. The non-powered fan 9 comprises a circular frame 91, within which a support arm 92 is disposed. A bearing assembly 93 is disposed in the middle of the support arm 92. A rotating shaft 94 extends through the middle of the bearing assembly 93. Non-powered blades 95 are sleeved onto the rotating shaft 94.

[0043] The working process of this fan:

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

[0045] Active motor cooling: An external cooling source, such as 20°C cooling water, flows through inlet pipe 72, into the channel within connecting arm 3, and into spiral portion 71. The cooling water flows through the tightly coiled spiral, efficiently absorbing heat dissipated from the motor 5 housing. The heated cooling water then flows through outlet pipe 73, into the other connecting arm 3, and returns to the external system for circulation.

[0046] Impeller Work and Gas Acceleration: The diverted airflow propels the fan impeller 6 at high speed, acquiring kinetic and pressure energy, accelerating the flow toward the rear end of the main cylinder 1. When the high-pressure airflow reaches the air guide hood 8, the conical structure guides the airflow to smoothly contract and accelerate, avoiding the formation of recirculation zones in corners. Rapid air guide slots 800 create a wall-coated jet effect, accelerating the discharge of boundary layer gas and preventing separation. They also induce micro-vortices within the slots, enhancing radial mixing of the gas, disrupting large-scale recirculation vortices, and significantly reducing pressure loss.

[0047] When the high-speed airflow flows through the straight portion 82, it drives the unpowered blades 95 to rotate at high speed. The rotating blades further break up the residual vortex, so that the airflow is discharged more evenly.

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

[0049] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. An energy-saving fan with efficient heat dissipation function, characterized by: include Main cylinder (1), A heat dissipation cylinder (2) is fixedly arranged at the center of the main cylinder (1) via a connecting arm (3); the connecting arm (3) is configured as a hollow structure for connecting the interior of the heat dissipation cylinder (2) and the exterior of the main cylinder (1); The motor (5) is fixedly plugged into the heat dissipation cylinder (2), and the output end of the motor (5) passes through the heat dissipation cylinder (2) and is connected to the fan impeller (6); The guide blade (4) is fixedly arranged outside the heat dissipation cylinder (2) and is arranged perpendicular to the connecting arm (3).

2. The energy-saving fan with high-efficiency heat dissipation function according to claim 1, characterized in that: A cooling assembly (7) is provided inside the heat dissipation cylinder (2); the cooling assembly (7) comprises a spiral portion (71) arranged around the outside of the motor (5); the inlet end and the outlet end of the spiral portion (71) are respectively connected to a liquid inlet pipe (72) and a liquid outlet pipe (73); the liquid inlet pipe (72) and the liquid outlet pipe (73) respectively pass through the two connecting arms (3) and are connected to an external cooling source.

3. The energy-saving fan with high-efficiency heat dissipation function according to claim 1, characterized in that: An air guide hood (8) is fixedly provided at the rear end of the main cylinder (1), and the air guide hood (8) comprises a contraction portion (81) and a straight portion (82); and rapid air guide grooves (800) are evenly provided on the surface of the contraction portion (81).

4. The energy-saving fan with high-efficiency heat dissipation function according to claim 3, characterized in that: The rapid air guide groove (800) is configured to be composed of strip-shaped grooves arranged at an inclined angle of 15°.

5. The energy-saving fan with high-efficiency heat dissipation function according to claim 3, characterized in that: The rapid air guide groove (800) is composed of a plurality of air guide units connected end to end in an interlaced manner; the air guide units include arcuate grooves (801) and straight grooves (802); wherein the middle portion of the straight groove (802) in the previous air guide unit is connected to the arcuate groove (801) in the next air guide unit, and the lower portion of the straight groove (802) in the previous air guide unit is connected to the middle portion of the straight groove (802) in the next air guide unit.

6. The energy-saving fan with high-efficiency heat dissipation function according to claim 3, characterized in that: A non-powered fan (9) is fixedly embedded in the straight portion (82).

7. The energy-saving fan with high-efficiency heat dissipation function according to claim 6, characterized in that: The unpowered fan (9) comprises a circular frame (91), a support arm (92) is provided inside the circular frame (91); a bearing kit (93) is provided in the middle of the support arm (92); a rotating shaft (94) is provided through the middle of the bearing kit (93); and an unpowered blade (95) is sleeved on the rotating shaft (94).

8. The energy-saving fan with high-efficiency heat dissipation function according to claim 1, characterized in that: The connecting arm (3) is configured as a flat shape, wherein the arc section faces the air inlet; and the guide blade (4) is configured as an obliquely curved structure.

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

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