Axial flow fan integrating air supply and air exhaust
By designing an axial flow fan that integrates air supply and exhaust, and adopts a dual impeller structure and a motor-controlled forward and reverse operation, the problem that general axial flow fans cannot supply air and exhaust at the same time is solved, and the effect of saving investment costs and reducing construction volume is achieved.
Patent Information
- Application Number
- CN202422034071.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-21
AI Technical Summary
Generally, axial flow fans can only provide air in one direction under the conditions of a certain rotation direction, and cannot provide air and exhaust air at the same time, resulting in the use of two fans to switch in turn in material drying and ventilation projects in large public places, which increases project investment and construction volume.
A axial flow fan integrating air supply and exhaust is designed, adopting a double impeller structure, both impeller one and impeller two are connected to the motor, and the forward and reverse rotation of the impeller are controlled through the motor to achieve air supply or exhaust.
The axial flow fan has the ability to supply and exhaust air at the same time, greatly reducing project investment and construction volume and saving investment costs.
Smart Images
Figure CN222963043U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of axial fans, and particularly relates to an axial fan integrating air supply and air exhaust. Background Art
[0002] For a general axial fan, under the condition of a certain rotation direction, it can only supply air in one direction. When the rotation direction is reversed, the fan does not have the ability to supply air. In the material drying industry, it is necessary to supply hot air to improve the drying efficiency and also to discharge the moisture volatilized from the material. The solution is to use two fans, one for supplying hot air and the other for discharging moisture. In the ventilation project of large public places, sometimes it is necessary to supply air into the room, but sometimes it is necessary to exhaust air. The solution to this problem is to use two fans to switch and work alternately. Content of the Utility Model
[0003] The purpose of the utility model is to solve the above problems. The present application proposes an axial fan integrating air supply and air exhaust, with a double-impeller structure. Impeller 1 and impeller 2 are both connected to the motor, and the motor controls the forward and reverse rotation of impeller 1 or impeller 2 to realize the air supply or air exhaust of this axial fan.
[0004] To achieve the above purpose, the utility model provides the following technical solutions: an axial fan integrating air supply and air exhaust, including impeller 1, impeller 2, and a fan air duct. The fan air duct is cylindrical and encloses the motor, impeller 1, impeller 2, a cooling air duct, and an inner motor cylinder. Impeller 1 and impeller 2 are both connected to the motor and are located at both ends of the motor. An inner motor cylinder is provided outside the motor. The inner motor cylinder is cylindrical, and there is a cooling air duct between the front and rear of the inner motor cylinder and the fan air duct. One end of the cooling air duct is connected to the fan air duct, and the other end is connected to the inner motor cylinder.
[0005] Further: motor shafts are provided at both ends of the motor, and impeller 1 and impeller 2 are installed on the motor shafts and have opposite installation directions.
[0006] Further: the motor is placed inside the inner motor cylinder, and the inner motor cylinder is a cylinder with openings at both ends.
[0007] Further: rectifying covers are provided outside both impeller 1 and impeller 2.
[0008] Further: the inner motor cylinder communicates with the atmosphere through the cooling air duct.
[0009] Further: the motor is used to control the forward and reverse rotation of impeller 1 or impeller 2.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0011] The axial flow fan with a double impeller structure of the present utility model has impeller one and impeller two connected to the motor, and impeller one and impeller two are installed in opposite directions. An ordinary standard motor is selected for the motor, and its forward and reverse rotations are controlled by a frequency converter, thereby controlling the forward and reverse rotations of the impellers. When the motor starts to work, one of the impellers rotates forward, that is, the working impeller, to achieve air supply; when the rotation direction of the motor changes, the rotations of both impellers change simultaneously, that is, to achieve air exhaust. This enables the axial flow fan to have both air supply and air exhaust capabilities. This integrated axial flow fan can greatly reduce the project investment and construction volume, and save the investment cost. Brief Description of the Drawings
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the technical solutions of the embodiments of the present utility model or the prior art. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0013] Figure 1 The front view of the overall structure schematic diagram of the present utility model;
[0014] Figure 2 The side view of the overall structure schematic diagram of the present utility model;
[0015] Figure 3 The structure schematic diagram of the rotation direction of impeller one and the air inlet direction of the present utility model;
[0016] Figure 4 The structure schematic diagram of the rotation direction of impeller two and the air inlet direction of the present utility model;
[0017] Figure 5 The front view of the structure schematic diagram of the motor of the present utility model installed on the outside;
[0018] Figure 6 The side view of the structure schematic diagram of the motor of the present utility model installed on the outside;
[0019] Figure 7 The structure schematic diagram of the round head cooling air duct of the present utility model
[0020] Figure 8 The structure schematic diagram of the pointed head cooling air duct of the present utility model;
[0021] In the figure: 1 - impeller one, 2 - fan air duct, 3 - cooling air duct, 4 - impeller two, 5 - motor, 6 - motor outer cylinder, 7 - bearing. Detailed Embodiment
[0022] To enable those skilled in the art to better understand and implement the technical solution of the present utility model, the present utility model will be further described below in conjunction with specific embodiments. However, the embodiments cited are only for the illustration of the present utility model and do not limit the present utility model.
[0023] As Figures 1 - 4 shown, an axial flow fan integrating air supply and exhaust includes an impeller 1, an impeller 4, and a fan barrel 2. The fan barrel 2 is cylindrical and encloses the motor 5, the impeller 1, the impeller 4, the cooling air duct 3, and the motor inner cylinder 6. The impeller 1 and the impeller 4 are both connected to the motor 5 and are located at both ends of the motor 5. The two ends of the motor 5 are provided with motor shafts. The impeller 1 and the impeller 4 are installed on the motor shafts and have opposite installation directions. The motor 5 is detachably connected to the motor shaft. The motor 5 is controlled by a frequency converter to operate. The frequency converter is provided with a forward / reverse control button. The forward or reverse rotation of the motor 5 realizes the forward or reverse rotation of the impeller 1 or the impeller 4, thereby realizing air supply or exhaust.
[0024] Rectifying covers are provided on the outer sides of the impeller 1 and the impeller 4 to protect the blades on the impellers. An inner motor cylinder 6 is provided on the outer side of the motor 5. The inner motor cylinder 6 is cylindrical with openings at both ends for ventilation, and the motor is placed inside the inner motor cylinder.
[0025] A cooling air duct 3 is provided between the front and rear of the inner motor cylinder 6 and the fan barrel 2. One end of the cooling air duct 3 is communicated with the fan barrel 2, and the other end is communicated with the inner motor cylinder 6. The inner motor cylinder 6 is communicated with the atmosphere through the cooling air duct 3. Although the air outlet direction of the blower can be changed by the forward and reverse rotation of the motor 5 for the impeller 1 and the impeller 4, the inner motor cylinder 6 always remains at the air inlet end, that is, a negative pressure is maintained inside the inner motor cylinder 6.
[0026] Preferably: The motor 5 can also be installed outside the fan barrel 2, and the rotation of the impeller is realized by means of a pulley drive structure. As Figure 5 、 6 shown, when the motor 5 is installed outside the fan barrel 2, the impeller 1 and the impeller 4 are connected through an impeller shaft, and a bearing 7 is installed on the impeller shaft.
[0027] Preferably: The rectifying cover can also be hemispherical or elliptical to reduce the air duct resistance.
[0028] Preferably: The cooling air duct 3 is designed with a pointed head or a round head to reduce the air duct resistance.
[0029] Working principle
[0030] Start the motor. When the motor rotates forward, the impeller 4 is the working impeller and the impeller 1 is the guide impeller. At this time, end A is the air inlet end and end B is the air outlet end. As Figure 1As shown in the figure; by the same principle, when the motor rotates in the reverse direction, impeller one is the working impeller and impeller two is the guide impeller. At this time, end A is the air outlet and end B is the air inlet.
[0031] By changing the rotation direction of the motor, the transformation between the working impeller and the guide impeller of impeller one and impeller two is realized, and the transformation between the air inlet and the air outlet is also realized.
[0032] This axial flow fan is mainly applied in the material drying industry, large public place ventilation projects, etc.
[0033] The impeller and the motor involved in this axial flow fan are mature technologies in the prior art, and their structures and principles are also mature technologies. Applying them to the present utility model, the double impellers with opposite installation directions realize the functions of air supply and air exhaust through the forward and reverse rotations of the motor.
[0034] The content not described in detail in the present utility model is all prior art.
[0035] The above are only the preferred embodiments of the present utility model, and are not limited to what is described in the specification and the embodiments. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present utility model should be included in the scope of the patent application of the present utility model.
Claims
1. An axial flow fan integrating air supply and exhaust, comprising an impeller 1 (1), an impeller 2 (4), and a fan cylinder (2), characterized in that: The fan cylinder (2) is cylindrical and encloses the motor (5), the first impeller (1), the second impeller (4), the cooling air duct (3), and the motor inner cylinder (6). The first impeller (1) and the second impeller (4) are both connected to the motor (5) and are located at two ends of the motor (5). A motor inner cylinder (6) is provided on the outside of the motor (5). The motor inner cylinder (6) is cylindrical. A cooling air duct (3) is provided between the front and rear of the motor inner cylinder (6) and the fan cylinder (2). One end of the cooling air duct (3) is connected to the fan cylinder (2), and the other end is connected to the motor inner cylinder (6).
2. The axial flow fan integrating air supply and exhaust according to claim 1, characterized in that: Motor shafts are provided at both ends of the motor (5), and the impeller 1 (1) and the impeller 2 (4) are mounted on the motor shafts in opposite directions.
3. The axial flow fan integrating air supply and exhaust according to claim 1, characterized in that: The motor (5) is placed in a motor inner cylinder (6); the motor inner cylinder (6) is a cylinder with openings at both ends.
4. The axial flow fan integrating air supply and exhaust according to claim 1, characterized in that: The outer sides of the impeller 1 (1) and the impeller 2 (4) are both provided with fairings.
5. The axial flow fan integrating air supply and exhaust according to claim 1, characterized in that: The motor inner cylinder (6) is connected to the atmosphere through a cooling air duct (3).
6. The axial flow fan integrating air supply and exhaust according to claim 1, characterized in that: The motor (5) controls the forward and reverse rotation of the impeller one (1) or the impeller two (4).