Energy-saving fan

Abstract

The utility model discloses an energy -conserving fan, including fan shell, centrifugal fan blade, motor, wind box, air outlet pipe and connecting hose. Motor is fixed at one side of fan shell, and the one end of motor is connected with hollow wind box to fan shell, and the one side of wind box is provided with a plurality of circularly arranged blow -off hole of uniform arrangement, and the outside of wind box is communicated with the air outlet of air outlet pipe lateral wall through connecting hose. When fan works, motor drives centrifugal fan blade to rotate, and air is inhaled through the central opening of end cover and is discharged through air outlet pipe, and part of high pressure airflow in air outlet pipe is introduced into wind box through air outlet and connecting hose, and is uniformly blown to the surface of motor shell through blow -off hole, and realizes the forced cooling of motor. The structure utilizes the airflow of fan itself to form circulating heat dissipation path, and can realize motor automatic temperature reduction without additional cooling device, and effectively reduces energy consumption, improves operation stability and prolongs the service life of fan.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically relating to an energy-saving fan. Background Technology

[0002] Currently, fans, as a common air circulation and gas transport device, are widely used in industrial ventilation, building ventilation, and equipment cooling. Existing fans generally consist of a motor, fan blades, an exhaust duct, and a casing. The motor drives the blades to rotate, thereby achieving air intake and exhaust. However, during long-term operation, the motor continuously generates heat while driving the blades. If heat dissipation is not timely, the motor temperature will rise, affecting its efficiency and lifespan.

[0003] To address the motor heat dissipation problem, existing technologies typically employ methods such as adding heat sinks to the outer surface of the motor or installing independent cooling fans outside the fan to enhance heat dissipation. However, such structures have significant drawbacks: firstly, heat sinks rely primarily on natural airflow for heat dissipation, resulting in a slow cooling rate and difficulty in reducing motor temperature promptly during high-load fan operation; secondly, independent cooling fans increase energy consumption and structural complexity, not only raising energy consumption levels but also causing maintenance inconvenience, thus contradicting the design goals of energy conservation and environmental protection.

[0004] In addition, although some fans have air guiding structures, the airflow does not directly act on the motor surface, resulting in a long heat dissipation path and low heat dissipation efficiency. Furthermore, the fans still have problems such as motor overheating and shutdown or performance degradation during continuous operation. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide an energy-saving fan that can effectively cool and dissipate heat from the motor by utilizing the fan's own airflow structure without increasing additional energy consumption.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An energy-saving fan includes a fan housing, centrifugal fan blades disposed inside the fan housing, and a motor fixed to one side of the fan housing and connected to the centrifugal fan blades. A circular air box is fixed to the end of the motor facing the fan housing. The air box is a hollow shell and is fixed to the fan housing by screws. Several air holes are evenly arranged in a circular shape on the side of the air box facing the motor.

[0008] The right side of the fan casing has an air outlet pipe that blows air to the right, and the side of the air outlet pipe is connected to the air box via a connecting hose.

[0009] Furthermore, several fixing blocks are fixed on the outer circumferential surface of the air box, and an air inlet connector connected to the connecting hose is also fixed on the outer circumferential surface of the air box.

[0010] Furthermore, the air box has an opening on the side facing the fan housing, and a sealing ring is fixed to the edge of the opening end of the air box.

[0011] Furthermore, a connecting platform is provided at the end of the motor facing the air box, and a connector for connecting to the centrifugal fan blade is fixed at one end of the motor's output shaft. Several fixing threaded holes are provided on the surface of the connecting platform.

[0012] Furthermore, an air outlet is provided on the side of the air outlet duct, which is connected to the connecting hose, and an annular boss is fixed on the side of the air outlet duct at the air outlet.

[0013] Furthermore, an air outlet cover is provided on the inner side of the air outlet duct, which is fixed to the annular boss by screws, and an air outlet connector for connecting to the connecting hose is fixed on the cover.

[0014] Furthermore, a mounting platform is provided on the front side of the fan casing, and an opening is provided on the rear side of the fan casing. An annular end cap is installed at the opening of the fan casing, and several connecting plates are fixed to the outer edge of the end cap. The connecting plates are fixed to the fan casing with screws.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This energy-saving fan utilizes its own airflow circulation to achieve synchronous heat dissipation of the motor, avoiding the energy consumption problem of traditional fans that require additional heat sinks or independent cooling fans. The high-pressure airflow formed inside the air outlet duct is guided to the motor surface through the air outlet, connecting hoses, and air box, so that the motor can continuously receive uniform cooling airflow during operation. This effectively reduces the motor's operating temperature, prevents the motor from reducing efficiency and aging insulation due to excessive temperature rise, and significantly extends the overall service life of the fan.

[0017] This energy-saving fan uses an air box and several circumferential air holes to ensure that the introduced airflow is evenly distributed on the outer surface of the motor. This structure ensures uniform cooling effect and avoids localized insufficient heat dissipation. At the same time, the combination design of the air box and the sealing ring ensures that the airflow forms a closed loop inside the fan and does not leak, thereby improving cooling efficiency and maintaining the energy-saving characteristics of the system.

[0018] The energy-saving fan has a compact overall structure. Through the reasonable coordination between the air outlet pipe, connecting hose, air box and end cover, the fan can achieve air circulation while maintaining the original blowing function. This design reduces the space required for external heat dissipation devices, reduces structural complexity and manufacturing costs. At the same time, the formation of the air guiding structure effectively improves the overall energy efficiency of the fan system, achieving the technical effects of low energy consumption, high heat dissipation and long service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the air box of this utility model;

[0021] Figure 3 This is a schematic diagram of the motor of this utility model;

[0022] Figure 4 This is a schematic diagram of the front structure of the fan housing of this utility model;

[0023] Figure 5 This is a schematic diagram of the rear structure of the fan housing of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Motor; 11. Connecting platform; 12. Connector; 13. Fixing threaded hole; 2. Air box; 21. Air inlet connector; 22. Sealing ring; 23. Air outlet; 24. Fixing block; 3. Fan housing; 31. Mounting platform; 32. Connecting plate; 33. End cap; 4. Connecting hose; 5. Air outlet pipe; 51. Air outlet; 52. Annular boss; 53. Cover; 54. Air outlet connector; 6. Centrifugal fan blade. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figure 1 and Figure 2As shown, an energy-saving fan includes a fan housing 3, centrifugal fan blades 6 disposed inside the fan housing 3, and a motor 1 fixed to one side of the fan housing 3 and connected to the centrifugal fan blades 6. In existing fans, the motor is prone to overheating due to insufficient heat dissipation during long-term operation, thus affecting drive efficiency and service life. Therefore, in this energy-saving fan, a circular air box 2 is fixed to the end of the motor 1 facing the fan housing 3. The air box 2 is a hollow shell structure that forms an annular channel for air circulation. The air box 2 is fastened to the fan housing 3 by several screws, ensuring that the central axis of the air box 2 is coaxial with the output shaft of the motor 1, guaranteeing overall airflow uniformity. The air box 2 has several air holes 23 arranged evenly in a circular pattern on the side facing the motor 1. The air holes 23 are used to blow high-pressure airflow evenly onto the surface of the motor 1 housing to achieve heat dissipation and cooling. The right side of the fan housing 3 is provided with an air outlet pipe 5 that blows air to the right. The side of the air outlet pipe 5 is connected to the air box 2 through a connecting hose 4. The connecting hose 4 is made of flexible high-temperature resistant material, which can effectively prevent vibration transmission and maintain stable airflow. Through the above structure, when the fan is running, the high-pressure airflow formed inside the air outlet pipe 5 is introduced into the air box 2 through the connecting hose 4 and blown onto the surface of the motor through the air holes 23, thereby achieving the self-cooling effect of the motor, reducing energy consumption and extending the life of the fan.

[0028] like Figure 2 As shown, several fixing blocks 24 are fixed on the outer circumferential surface of the air box 2. The fixing blocks 24 are used to screw into the mounting platform 31 to provide stable support. The air box 2 is fixed to the mounting platform 31 with the fixing blocks 24 and screws to ensure structural stability during high-speed operation. An air inlet connector 21 connected to the connecting hose 4 is also fixed on the outer circumferential surface of the air box 2. The air inlet connector 21 is connected to the inside of the air box 2 to make the air flow path unobstructed. The side of the air box 2 facing the fan housing 3 is opened to form a convection channel with the heat dissipation surface of the motor 1. A sealing ring 22 is fixed to the edge of the opening end of the air box 2. The sealing ring 22 is made of high-temperature resistant silicone material, which has good elasticity and sealing performance and can prevent air leakage. One end of the opening of the air box 2 is covered on the mounting platform 31, and the edge is tightly sealed by the sealing ring 22, so that a stable airflow cavity structure is formed between the air box 2 and the motor 1, ensuring that the cooling airflow can be concentrated on the motor surface and improving the heat dissipation efficiency.

[0029] like Figure 3As shown, a connecting platform 11 is provided at the end of the motor 1 facing the air box 2. The connecting platform 11 is used to provide an installation reference for the air box 2. A connector 12 connected to the centrifugal fan blade 6 is fixed at one end of the output shaft of the motor 1. The connector 12 achieves torque transmission through a key connection to ensure the rotational balance of the fan blade 6. Several fixing threaded holes 13 are opened on the surface of the connecting platform 11. The fixing threaded holes 13 correspond to the mounting holes on the air box 2 and are fixedly connected by screws to form a reliable sealing interface. Through this structure, when the motor 1 is working, it drives the centrifugal fan blade 6 to rotate at high speed through the output shaft to form an airflow, thereby forming a low-pressure area inside the fan housing 3 to achieve continuous air intake and exhaust. At the same time, the air box 2 provides directional cooling airflow to the motor 1 housing through the air blowing hole 23, so that the motor maintains a stable temperature during long-term operation.

[0030] like Figure 4 As shown, the side of the air outlet duct 5 is provided with an air outlet 51 that communicates with the connecting hose 4. The air outlet 51 is used to guide part of the airflow into the connecting hose 4, thereby forming a motor cooling air path. An annular boss 52 is fixed on the side of the air outlet duct 5 at the air outlet 51. The annular boss 52 is used to reinforce the structure of the air outlet and prevent fatigue cracking caused by long-term airflow impact. The cover 53 can be stably fixed by installing threaded holes on the annular boss 52, so that the entire cooling branch is reliably sealed.

[0031] like Figure 4 As shown, a cover 53 covering the air outlet 51 is provided on the inner side of the air outlet 5. The cover 53 is fixed to the annular boss 52 by screws. The cover 53 forms a stable air-draining cavity. An air outlet connector 54 connected to the connecting hose 4 is fixed on the cover 53. The air outlet connector 54 is made of metal or high-strength plastic and can withstand the impact of long-term high-pressure airflow. This structure allows the high-pressure airflow in the air outlet 5 to be stably discharged to the air box 2, realizing the circulation of airflow inside the fan, thereby achieving energy-saving and cooling effects during the operation of the fan.

[0032] like Figure 4 and Figure 5As shown, a mounting platform 31 is provided on the front side of the fan housing 3. The mounting platform 31 is an integral cast structure, providing a mounting reference for the air box 2 and the motor 1. An opening is provided on the rear side of the fan housing 3 to facilitate air intake. An annular end cap 33 is installed at the opening of the fan housing 3. Several connecting plates 32 are fixed to the outer edge of the end cap 33. The connecting plates 32 are fixed to the fan housing 3 by screws. An air intake port is opened in the center of the end cap 33, allowing air to enter the fan through the air intake port. Through this structure, when the motor 1 drives the centrifugal fan blades 6 to rotate, air is drawn in from the air intake port of the end cap 33, pressurized through the airflow channel formed inside the fan housing 3, and discharged through the air outlet pipe 5. At the same time, part of the airflow is guided into the air box 2 through the air outlet 51 and the connecting hose 4, and then blown evenly onto the surface of the motor housing through the air blowing hole 23 to achieve synchronous cooling of the motor, thereby effectively solving the problems of low motor heat dissipation efficiency, high energy consumption, and short service life in existing fans.

[0033] The working principle of this utility model is as follows: When the fan is working, the centrifugal fan blades 6 are driven to rotate by the motor 1. At this time, the fan draws in air through the central opening of the end cover 33 and blows air out through the air outlet pipe 5, thereby completing the blowing work of the fan.

[0034] When the fan blows air outward through the air outlet duct 5, the air outlet duct 5 is under high pressure. At this time, part of the air in the air outlet duct 5 flows to the connecting hose 4 through the air outlet 51 and the cover 53. Then the connecting hose 4 sends the air into the air box 2. At this time, the air entering the air box 2 is blown evenly onto the outer surface of the motor 1 through several air blowing holes 23, thereby blowing away the heat generated by the motor 1 when it is working and cooling the motor 1. Thus, the fan can automatically dissipate heat and cool the motor 1 while it is working, which greatly extends the service life of the entire fan.

[0035] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An energy-saving fan, comprising a fan housing (3), centrifugal fan blades (6) disposed within the fan housing (3), and a motor (1) fixed to one side of the fan housing (3) and connected to the centrifugal fan blades (6), characterized in that: A circular air box (2) is fixed to one end of the motor (1) facing the fan housing (3). The air box (2) is a hollow shell. The air box (2) is fixed to the fan housing (3) by screws. Several air holes (23) are evenly arranged in a circular shape on the side of the air box (2) facing the motor (1). The right side of the fan housing (3) is provided with an air outlet pipe (5) that blows air to the right, and the side of the air outlet pipe (5) is connected to the air box (2) through a connecting hose (4).

2. The energy-saving fan according to claim 1, characterized in that: The outer circumferential surface of the air box (2) is fixed with several fixing blocks (24), and the outer circumferential surface of the air box (2) is also fixed with an air inlet connector (21) connected to the connecting hose (4).

3. The energy-saving fan according to claim 2, characterized in that: The air box (2) has an opening on the side facing the fan housing (3), and a sealing ring (22) is fixed to the edge of the opening end of the air box (2).

4. An energy-saving fan according to claim 3, characterized in that: The motor (1) is provided with a connecting platform (11) at one end facing the air box (2), and a connector (12) for connecting to the centrifugal fan blade (6) is fixed at one end of the output shaft of the motor (1). Several fixing threaded holes (13) are opened on the surface of the connecting platform (11).

5. An energy-saving fan according to claim 1, characterized in that: The side of the air outlet pipe (5) is provided with an air outlet (51) that communicates with the connecting hose (4), and an annular boss (52) is fixed on the side of the air outlet pipe (5) at the air outlet (51).

6. An energy-saving fan according to claim 5, characterized in that: The inner side of the air outlet pipe (5) is provided with a cover (53) covering the air outlet (51). The cover (53) is fixed to the annular boss (52) by screws, and an air outlet connector (54) connected to the connecting hose (4) is fixed on the cover (53).

7. An energy-saving fan according to claim 1, characterized in that: The fan housing (3) has a mounting platform (31) on the front side and an opening on the rear side. An annular end cap (33) is installed at the opening of the fan housing (3). Several connecting plates (32) are fixed on the outer edge of the end cap (33). The connecting plates (32) are fixed to the fan housing (3) by screws.

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