Air duct of axial flow fan

Abstract

The utility model relates to the technical field of axial flow fans, and discloses an axial flow fan air duct which comprises a straight air duct body, outer flanges are formed at the two ends of the air duct body, a first reinforcing rib is fixed to the outer side wall of the air duct body, a second reinforcing rib is fixed to the middle of the air duct body, an installation frame is fixed in the air duct body, and a transmission assembly is arranged at the upper end of the installation frame. The transmission assembly is located in the middle of the air duct, the strength of the air duct can be improved by arranging the first reinforcing ribs and the second reinforcing ribs, the problem that in the prior art, an air duct is prone to fatigue due to repeated vibration is solved, and therefore the service life of the air duct is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan technology, and specifically to an axial flow fan duct. Background Technology

[0002] Axial flow fans have a wide range of applications. They are fans that direct airflow in the same direction as the fan's axis, such as electric fans and air conditioner outdoor unit fans. They are called "axial flow" because the gas flows parallel to the fan's axis. Axial flow fans are typically used in applications requiring high flow rates but low pressure. An axial flow fan is fixed in position and moves air. It mainly consists of an impeller and a casing. While its structure is simple, it requires very high specifications. When the impeller rotates, gas enters axially from the inlet. The gas is pushed by the blades on the impeller, increasing its energy, and then flows into the guide vanes. The guide vanes deflect the airflow into axial flow and simultaneously guide the gas into the diffuser, further converting the gas's kinetic energy into pressure energy, before finally introducing it into the working pipeline. Small axial flow fans are characterized by low power consumption, fast heat dissipation, energy saving, and environmental friendliness. Due to their small size, they have a wide range of applications. Large axial flow fans are characterized by simple structure, robust reliability, large air volume, and a wide range of functional options. The manufacturing of axial flow fans requires processing of the fan casing.

[0003] Currently, existing axial flow fans typically include a motor, an impeller, and a fan casing. Their working principle is: start the motor, which drives the impeller to rotate at high speed, thereby generating airflow.

[0004] In the above solutions, the existing duct wall thickness is usually thin, and the axial flow fan will generate repetitive vibrations during operation, which can easily cause duct fatigue and result in a short service life of the duct. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an axial flow fan duct. By providing a first reinforcing rib and a second reinforcing rib, the strength of the duct can be improved, solving the problem of fatigue caused by repeated vibration in the prior art, thereby improving the service life of the duct.

[0006] The solution of this utility model to the aforementioned technical problem is:

[0007] An axial flow fan duct includes a straight duct with outward flanges at both ends, a first reinforcing rib fixed on the outer side wall of the duct, a second reinforcing rib fixed in the middle of the duct, a mounting frame fixed inside the duct, and a transmission component located at the upper end of the mounting frame in the middle of the duct.

[0008] By incorporating a first reinforcing rib, the overall strength of the air duct is improved. When the transmission assembly is in operation, the middle part of the air duct experiences the most severe vibration. By incorporating a second reinforcing rib, the strength of the middle part of the air duct is improved, thereby effectively preventing fatigue caused by repeated vibrations.

[0009] By incorporating a first reinforcing rib and a second reinforcing rib, the strength of the ventilation duct can be improved, solving the problem of fatigue caused by repeated vibration in the existing technology, thereby increasing the service life of the ventilation duct.

[0010] The utility model is further configured such that: the first reinforcing rib includes three horizontal ribs fixed on the outer wall of the air duct, one of which is located in the middle of the air duct, and the other two are symmetrically arranged at both ends of the air duct, and the second reinforcing rib is located between the two symmetrically arranged horizontal ribs.

[0011] The above technical solution, with its three horizontal ribs, can improve the overall strength of the ventilation duct.

[0012] The utility model is further configured such that: the second reinforcing rib includes multiple "X"-shaped ribs fixed on the outer wall of the air duct, the middle part of the "X"-shaped rib is located in the middle of the air duct, and the upper and lower ends of the "X"-shaped rib are respectively fixedly connected to two horizontal ribs.

[0013] The above technical solution, by incorporating multiple "X"-shaped ribs, enhances the strength of the duct between the two symmetrically arranged horizontal ribs, effectively preventing fatigue caused by repeated vibrations and thus extending the service life of the duct.

[0014] The utility model is further configured such that: the transmission component includes a motor fixed on the upper end of the mounting frame, and a fan impeller is fixed on the output end of the motor, with the fan impeller and the fan casing arranged coaxially.

[0015] By using the above technical solution, the motor is started, which drives the fan impeller to rotate at high speed, thereby generating wind power.

[0016] The utility model is further configured such that multiple vertical ribs are fixed on the outer wall of the air duct.

[0017] The above technical solution, by incorporating multiple vertical ribs, further enhances the overall strength of the ventilation duct.

[0018] The utility model is further configured such that multiple vertical ribs are equidistantly arranged.

[0019] The above technical solution enables the vibration generated during the operation of the transmission components to be evenly distributed.

[0020] The utility model is further configured such that: the intersection of the horizontal and vertical bars forms an intersecting point, and the middle and upper and lower ends of the "X"-shaped bar coincide with the corresponding intersecting point.

[0021] The above technical solution further improves the strength of the air duct between the two symmetrically arranged horizontal ribs, thereby further improving the service life of the air duct.

[0022] The utility model is further configured such that a protective net is installed at the air outlet end of the air duct.

[0023] The above technical solutions prevent accidental contact with the fan impeller, thus avoiding injury, and also prevent foreign objects from entering the fan impeller and causing damage.

[0024] The beneficial effects of this utility model are:

[0025] Compared with the prior art, by incorporating the first and second reinforcing ribs, the strength of the air duct can be improved, solving the problem of fatigue caused by repeated vibration in the prior art, thereby increasing the service life of the air duct.

[0026] By installing a protective net, it is possible to prevent people from accidentally touching the fan impeller and causing injury, and at the same time, to prevent debris from entering the fan impeller and causing damage. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0029] Attached reference numerals: 1. Air duct; 101. Outward flange; 2. Mounting bracket; 3. Horizontal rib; 4. "X" shaped rib; 5. Motor; 6. Fan impeller; 7. Vertical rib; 8. Protective net. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0031] The following is for reference Figures 1 to 2 This utility model will now be described.

[0032] An axial flow fan duct includes a straight duct 1 with outward flanges 101 formed at both ends. A first reinforcing rib is fixed on the outer side wall of the duct 1, and a second reinforcing rib is fixed in the middle of the duct 1. A mounting frame 2 is fixed inside the duct 1, and a transmission component is provided at the upper end of the mounting frame 2. The transmission component is located in the middle of the duct 1.

[0033] By providing a first reinforcing rib, the overall strength of the air duct 1 is improved. When the transmission assembly is working, the middle part of the air duct 1 is subjected to the most severe vibration. By providing a second reinforcing rib, the strength of the middle part of the air duct 1 is improved, thereby effectively preventing the air duct 1 from fatigue caused by repeated vibration.

[0034] By incorporating a first reinforcing rib and a second reinforcing rib, the strength of the ventilation duct 1 can be improved, solving the problem of fatigue caused by repeated vibration in the prior art, thereby increasing the service life of the ventilation duct 1.

[0035] The first reinforcing rib includes three horizontal ribs 3 fixed on the outer wall of the air duct 1. One horizontal rib 3 is located in the middle of the air duct 1, and the other two horizontal ribs 3 are symmetrically arranged at both ends of the air duct 1. The second reinforcing rib is located between the two symmetrically arranged horizontal ribs 3.

[0036] By incorporating three horizontal ribs 3, the overall strength of the ventilation duct 1 can be improved.

[0037] The second reinforcing rib includes multiple "X"-shaped ribs 4 fixed on the outer wall of the air duct 1. The middle part of the "X"-shaped rib 4 is located in the middle of the air duct 1, and the upper and lower ends of the "X"-shaped rib 4 are fixedly connected to two horizontal ribs 3 respectively.

[0038] By incorporating multiple "X"-shaped ribs 4, the strength of the air duct 1 between the two symmetrically arranged horizontal ribs 3 is improved, which can effectively prevent the air duct 1 from fatigue caused by repeated vibration, thereby increasing the service life of the air duct 1.

[0039] The transmission assembly includes a motor 5 fixed to the upper end of the mounting bracket 2, and a fan impeller 6 fixed to the output end of the motor 5. The fan impeller 6 is coaxially arranged with the fan casing 1.

[0040] Start motor 5 to drive fan impeller 6 to rotate at high speed, thereby generating wind power.

[0041] Multiple vertical ribs 7 are fixed on the outer wall of the ventilation duct 1.

[0042] By incorporating multiple vertical ribs 7, the overall strength of the ventilation duct 1 is further improved.

[0043] Multiple vertical ribs are set at equal intervals.

[0044] This allows the vibrations generated during the operation of the transmission components to be evenly distributed.

[0045] The intersection of the horizontal reinforcement 3 and the vertical reinforcement 7 forms an intersecting point, and the middle and upper and lower ends of the "X"-shaped reinforcement 4 coincide with the corresponding intersecting point.

[0046] The strength of the air duct 1 between the two symmetrically arranged horizontal ribs 3 is further improved, thereby further improving the service life of the air duct 1.

[0047] A protective net 8 is installed at the air outlet end of the air duct 1.

[0048] To prevent accidental contact with the fan impeller 6 and cause injury, and to prevent foreign objects from entering the fan impeller 6 and causing damage to it.

[0049] Working principle:

[0050] By providing three horizontal ribs 3, the overall strength of the duct 1 is improved. When the motor 5 drives the fan impeller 6 to rotate at high speed to generate wind, the middle part of the duct 1 is subjected to the most severe vibration. By providing multiple "X"-shaped ribs 4, the strength of the duct 1 between the two symmetrically arranged horizontal ribs 3 is improved, which can effectively prevent the duct 1 from fatigue caused by repeated vibration, thereby improving the service life of the duct 1.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. An axial flow fan duct, comprising a straight-tube duct (1), characterized in that: The two ends of the air duct (1) are formed with outward flanges (101). The outer side wall of the air duct (1) is fixed with a first reinforcing rib. The first reinforcing rib includes three horizontal ribs (3) fixed on the outer side wall of the air duct (1). One horizontal rib (3) is located in the middle of the air duct (1), and the other two horizontal ribs (3) are symmetrically arranged at both ends of the air duct (1). The middle part of the air duct (1) is fixed with a second reinforcing rib. The second reinforcing rib includes multiple "X" shaped ribs (4) fixed on the outer side wall of the air duct (1). The middle part of the "X" shaped rib (4) is located in the middle of the air duct (1). The upper and lower ends of the "X" shaped rib (4) are fixedly connected to two horizontal ribs (3) respectively. The air duct (1) is fixed with a mounting frame (2). The upper end of the mounting frame (2) is provided with a transmission component. The transmission component is located in the middle of the air duct (1).

2. The axial flow fan duct according to claim 1, characterized in that: The transmission assembly includes a motor (5) fixed on the upper end of the mounting bracket (2), and a fan impeller (6) fixed on the output end of the motor (5). The fan impeller (6) is coaxially arranged with the fan casing (1).

3. The axial flow fan duct according to claim 1, characterized in that: Multiple vertical ribs (7) are fixed on the outer wall of the ventilation duct (1).

4. The axial flow fan duct according to claim 3, characterized in that: Multiple vertical ribs (7) are set at equal intervals.

5. The axial flow fan duct according to claim 1, characterized in that: The intersection of the horizontal reinforcement (3) and the vertical reinforcement (7) forms an intersection point, and the middle and upper and lower ends of the "X"-shaped reinforcement (4) coincide with the corresponding intersection point.

6. The axial flow fan duct according to claim 1, characterized in that: A protective net (8) is installed at the air outlet of the air duct (1).

Images