A double wind box

Abstract

This utility model discloses a dual-airbox system, relating to the field of ventilation equipment technology. It includes a primary fan connected to a three-stage acceleration module, which in turn connects to a secondary fan housed within its casing. The three-stage acceleration module comprises a first acceleration chamber, a second acceleration chamber, and a third acceleration chamber. The first acceleration chamber is fixedly connected to the outlet of the primary fan, the second acceleration chamber is fixedly connected to the outlet of the first acceleration chamber, and the third acceleration chamber is fixedly connected to the outlet of the second acceleration chamber. The inner diameter of the first acceleration chamber is larger than that of the second acceleration chamber, and the inner diameter of the second acceleration chamber is larger than that of the third acceleration chamber. By setting up the three-stage acceleration module, this utility model achieves a progressively stronger airflow. The inner diameters of the first, second, and third acceleration chambers decrease sequentially, allowing the airflow to achieve a faster velocity when passing through each acceleration chamber, thereby effectively improving the airflow efficiency of the secondary fan.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, and more specifically, to a dual-airbox system. Background Technology

[0002] A bellows is a device that generates airflow through mechanical movement and is widely used in various applications requiring ventilation, air exchange, or pressurization. In existing technologies, traditional bellows designs often have a simple structure and limited airflow acceleration effect. Some bellows devices, due to unreasonable acceleration structures, result in significant airflow loss during transmission, leading to insufficient airflow transmission efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dual-windbox system that achieves progressive enhancement of wind power by setting up three acceleration modules. The inner diameters of the first, second, and third acceleration chambers decrease sequentially, and the airflow can obtain a faster flow rate when passing through each acceleration chamber, thereby effectively improving the air output efficiency of the secondary fan.

[0004] An embodiment of this application provides a dual-windbox system, including a primary fan, the primary fan being connected to a three-stage acceleration module, the three-stage acceleration module being connected to a secondary fan, and the secondary fan being disposed inside a secondary fan enclosure.

[0005] The three-stage acceleration module includes a first acceleration chamber, a second acceleration chamber, and a third acceleration chamber. The first acceleration chamber is fixedly connected to the air outlet of the first-stage fan, the second acceleration chamber is fixedly connected to the outlet of the first acceleration chamber, and the third acceleration chamber is fixedly connected to the outlet of the second acceleration chamber.

[0006] The inner diameter of the first acceleration chamber is larger than the inner diameter of the second acceleration chamber, and the inner diameter of the second acceleration chamber is larger than the inner diameter of the third acceleration chamber.

[0007] The air outlet duct is connected to the air outlet of the secondary fan at one end via a flange, and the other end is connected to the outside.

[0008] Furthermore, the outer casing of the primary fan is fixedly connected to the outer cover of the secondary fan via a bracket.

[0009] Furthermore, it also includes a steering module, the movable end of which is fixedly connected to the secondary fan casing. The steering module is mounted on the base plate and is used to drive the secondary fan casing to rotate, thereby driving the bracket and the primary fan to rotate, thus adjusting the inlet direction of the primary fan and the direction of the outlet duct.

[0010] Furthermore, the steering module includes a rotating shaft, the upper end of which is fixedly connected to the secondary fan casing, and the lower end of which is mounted on the base plate via a bearing. A connecting column is fixedly provided on the lower side of the secondary fan casing, and the lower end of the connecting column is rotatably connected to a limiting ring. The limiting ring is fixedly connected to the telescopic rod of the electric push rod, and the outer end of the outer shell of the electric push rod is rotatably connected to a fixing block, which is fixed to the base plate.

[0011] Furthermore, wheels are fixedly installed at the four lower corners of the base plate.

[0012] Furthermore, the base plate is screwed with a positioning bolt, and the lower end of the positioning bolt is fixedly connected to a positioning plate. The positioning plate is used to limit the base plate by pressing against the ground when it does not need to move.

[0013] Furthermore, the bracket is made of a one-piece molded stainless steel rod.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are:

[0015] By setting up three acceleration modules, the wind power is gradually enhanced. The inner diameter of the first, second and third acceleration chambers decreases in sequence, and the airflow can obtain a faster flow rate when passing through each acceleration chamber, thereby effectively improving the air output efficiency of the secondary fan. The primary fan and the secondary fan are connected through the three acceleration modules to form a stable wind power transmission system.

[0016] The steering module can drive the secondary fan casing to rotate, thereby driving the bracket and the primary fan to rotate. It can adjust the inlet direction of the primary fan and the direction of the outlet duct according to actual needs.

[0017] Wheels are fixed at the four corners of the bottom plate for easy movement and handling. The lower end of the positioning bolt is fixed to the positioning plate, which is used to limit the bottom plate against the ground when it is not needed, thus ensuring the stability of the dual bellows during use. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. Obviously, the drawings described below are merely some embodiments of this utility model, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0019] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0020] Figure 2 The three-dimensional representation of this utility model Figure 2 ;

[0021] Figure 3 This is a partial sectional view of the present invention;

[0022] Figure 4 The three-dimensional representation of this utility model Figure 3 ;

[0023] In the diagram: 1. Primary fan; 101. Air inlet; 2. Three-stage acceleration module; 201. First acceleration chamber; 202. Second acceleration chamber; 203. Third acceleration chamber; 3. Air outlet duct; 4. Secondary fan casing; 5. Steering module; 501. Rotating shaft; 502. Connecting column; 503. Limiting ring; 504. Bearing; 505. Electric push rod; 506. Fixing block; 6. Base plate; 7. Wheel; 8. Bracket; 9. Positioning bolt; 10. Positioning plate.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Example 1: A dual-windbox includes a primary fan 1, the primary fan 1 is connected to a three-stage acceleration module 2, the three-stage acceleration module 2 is connected to a secondary fan, and the secondary fan is disposed inside the secondary fan casing;

[0026] The three-stage acceleration module 2 includes a first acceleration chamber 201, a second acceleration chamber 202, and a third acceleration chamber 203. The first acceleration chamber 201 is fixedly connected to the air outlet of the first-stage fan 1, the second acceleration chamber 202 is fixedly connected to the outlet of the first acceleration chamber 201, and the third acceleration chamber 203 is fixedly connected to the outlet of the second acceleration chamber 202.

[0027] The inner diameter of the first acceleration chamber 201 is larger than the inner diameter of the second acceleration chamber 202, and the inner diameter of the second acceleration chamber 202 is larger than the inner diameter of the third acceleration chamber 203.

[0028] The air outlet duct 3 is connected at one end to the air outlet of the secondary fan via a flange, and at the other end to the outside.

[0029] In this embodiment, by setting up three acceleration modules 2, and with the inner diameters of the first acceleration chamber 201, the second acceleration chamber 202, and the third acceleration chamber 203 decreasing sequentially, the airflow is gradually accelerated. The principle is that when the airflow enters the second acceleration chamber 202 from the first acceleration chamber 201 (which has a larger inner diameter), the airflow velocity increases accordingly due to the smaller channel cross-sectional area, while the flow rate remains essentially constant. Similarly, when the airflow enters the third acceleration chamber 203 from the second acceleration chamber 202 (which has an even smaller inner diameter), the airflow velocity further increases. The gradually decreasing inner diameter allows the airflow to achieve smooth flow between the different acceleration chambers. The stable and efficient acceleration process allows the secondary fan to obtain a higher speed airflow input. When the primary fan 1 starts, the airflow first enters the first acceleration chamber 201 with a larger inner diameter. As the airflow flows, it enters the second acceleration chamber 202 with a slightly smaller inner diameter for secondary acceleration, and finally enters the third acceleration chamber 203 with the smallest inner diameter for tertiary acceleration. After three accelerations, the airflow enters the secondary fan at a higher speed. The secondary fan further pressurizes and accelerates the airflow, and finally discharges the high-speed airflow to the outside through the outlet duct 3. The secondary fan is set inside the secondary fan casing, which can play a certain protective role for the secondary fan.

[0030] The outer casing of the primary fan 1 is fixedly connected to the outer cover of the secondary fan via a bracket 8.

[0031] The bracket 8 is used to fix the outer casing of the primary fan 1 and the secondary fan.

[0032] The bracket 8 is made of a one-piece molded stainless steel rod. The stainless steel rod enhances the stability of the connection. Example

[0033] This embodiment is a further elaboration based on Embodiment 1. Compared with Embodiment 1, this embodiment also includes the following structure:

[0034] It also includes a steering module 5, the movable end of which is fixedly connected to the secondary fan cover. The steering module 5 is mounted on the base plate 6. The steering module 5 is used to drive the secondary fan cover to rotate, thereby driving the bracket 8 and the primary fan 1 to rotate, thereby adjusting the inlet direction of the primary fan 1 and the direction of the outlet duct 3.

[0035] The steering module 5 includes a rotating shaft 501. The upper end of the rotating shaft 501 is fixedly connected to the outer cover of the secondary fan. The lower end of the rotating shaft 501 is mounted on the base plate 6 via a bearing 504. A connecting column 502 is fixedly provided on the lower side of the outer cover of the secondary fan. The lower end of the connecting column 502 is rotatably connected to a limiting ring 503. The limiting ring 503 is fixedly connected to the telescopic rod of the electric push rod 505. The outer end of the outer shell of the electric push rod 505 is rotatably connected to a fixing block 506. The fixing block 506 is fixed on the base plate 6.

[0036] The extension and retraction of the electric push rod 505 can drive the limit ring 503 to move horizontally. Since the limit ring 503 is rotatably connected to the connecting column 502, and the connecting column 502 is fixed on the outer cover of the secondary fan, the horizontal movement of the limit ring 503 will be converted into the rotation of the outer cover of the secondary fan about the rotating shaft 501, which in turn drives the bracket 8 and the primary fan 1 to rotate synchronously, realizing the flexible adjustment of the inlet direction of the primary fan 1 and the direction of the outlet duct 3, so that the entire double air box can quickly adjust the air direction according to actual needs.

[0037] Wheels 7 are fixedly installed at the four lower corners of the base plate 6. One of the wheels 7 has a locking function to facilitate the movement and locking of the device.

[0038] The base plate 6 is screwed with positioning bolts 9, and the lower end of the positioning bolts 9 is fixedly connected to a positioning plate 10. The positioning plate 10 is used to limit the base plate 6 by pressing against the ground when it does not need to move.

[0039] By setting a positioning plate 10 and a positioning bolt 9, rotating the positioning bolt 9 can drive the positioning plate 10 to move, thereby realizing the height adjustment of the positioning plate 10. When the positioning plate 10 touches the ground, it can limit the bottom plate 6. When the positioning plate 10 leaves the ground, the bottom plate 6 can move easily after the wheel 7 is unlocked, thereby driving the movement of the primary fan 1 and the secondary fan, etc.

[0040] The working process of this utility model is as follows:

[0041] First, the primary fan 1 is started. After the primary fan 1 starts running, it generates airflow. This airflow enters the first acceleration chamber 201, which is fixedly connected to it. Since the inner diameter of the first acceleration chamber 201 is relatively large, the airflow flows in it at a relatively stable speed. The airflow enters the second acceleration chamber 202, which has a slightly smaller inner diameter, from the outlet of the first acceleration chamber 201. According to the principle of fluid dynamics, when the flow rate is basically constant, the smaller cross-sectional area of ​​the channel will increase the airflow speed accordingly, realizing the secondary acceleration of the airflow. The airflow enters the third acceleration chamber 203, which has the smallest inner diameter, from the outlet of the second acceleration chamber 202. The airflow speed is further increased, completing the three-stage acceleration process. After the three-stage acceleration, the high-speed airflow enters the secondary fan, which is set inside the secondary fan casing. The secondary fan further pressurizes and accelerates the airflow. After being pressurized and accelerated by the secondary fan, the high-speed airflow is discharged to the outside through the outlet pipe 3.

[0042] If the air direction needs to be adjusted, the telescopic rod of the electric push rod 505 can be extended or retracted, which will drive the limit ring 503 connected to it to move horizontally. Since the limit ring 503 is rotatably connected to the connecting column 502 fixed on the secondary fan cover, the horizontal movement of the limit ring 503 will be converted into the rotation of the secondary fan cover around the rotating shaft 501. The secondary fan cover is connected to the primary fan 1 through the bracket 8, which will drive the bracket 8 and the primary fan 1 to rotate synchronously, thereby realizing the adjustment of the inlet direction of the primary fan 1 and the direction of the outlet duct 3.

[0043] The wheels 7 located at the four corners of the bottom plate 6 facilitate the movement of the device. When the device is moved to the appropriate position, the positioning bolts 9 can be rotated to make the positioning plate 10 press against the ground, thereby limiting the bottom plate 6 and ensuring the stability of the device during operation.

[0044] The above-disclosed embodiments are merely specific examples of this utility model. However, this utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A dual-box system, comprising a primary fan (1), characterized in that, The primary fan (1) is connected to the three-stage acceleration module (2), the three-stage acceleration module (2) is connected to the secondary fan, and the secondary fan is installed inside the secondary fan casing; The three-stage acceleration module (2) includes a first acceleration chamber (201), a second acceleration chamber (202), and a third acceleration chamber (203). The first acceleration chamber (201) is fixedly connected to the air outlet of the first-stage fan (1), the second acceleration chamber (202) is fixedly connected to the outlet of the first acceleration chamber (201), and the third acceleration chamber (203) is fixedly connected to the outlet of the second acceleration chamber (202). The inner diameter of the first acceleration chamber (201) is larger than the inner diameter of the second acceleration chamber (202), and the inner diameter of the second acceleration chamber (202) is larger than the inner diameter of the third acceleration chamber (203). The air outlet duct (3) is connected to the air outlet of the secondary fan at one end via a flange, and the other end is connected to the outside.

2. The dual bellows according to claim 1, characterized in that, The outer casing of the primary fan (1) is fixedly connected to the outer cover of the secondary fan via a bracket (8) on the lower side of the casing.

3. A dual-bellows box according to claim 1, characterized in that, It also includes a steering module (5), the movable end of which is fixedly connected to the secondary fan cover. The steering module (5) is set on the base plate (6). The steering module (5) is used to drive the secondary fan cover to rotate, thereby driving the bracket (8) and the primary fan (1) to rotate, thereby adjusting the inlet direction of the primary fan (1) and the direction of the outlet duct (3).

4. A dual-bellows box according to claim 3, characterized in that, The steering module (5) includes a rotating shaft (501), the upper end of which is fixedly connected to the secondary fan cover, and the lower end of which is mounted on the base plate (6) via a bearing (504). A connecting column (502) is fixedly provided on the lower side of the secondary fan cover. The lower end of the connecting column (502) is rotatably connected to a limiting ring (503). The limiting ring (503) is fixedly connected to the telescopic rod of the electric push rod (505). The outer shell end of the electric push rod (505) is rotatably connected to a fixing block (506). The fixing block (506) is fixed on the base plate (6).

5. A dual-bellows box according to claim 3, characterized in that, Wheels (7) are fixedly installed at the four lower corners of the base plate (6).

6. A dual-bellows box according to claim 3, characterized in that, The base plate (6) is screwed with a positioning bolt (9), and the lower end of the positioning bolt (9) is fixedly connected to a positioning plate (10). The positioning plate (10) is used to limit the base plate (6) by pressing against the ground when it does not need to move.

7. A dual-bellows box according to claim 2, characterized in that, The bracket (8) is made of one-piece molded stainless steel rod.

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