An improved direct-drive centrifugal fan

Abstract

This utility model relates to the field of centrifugal fan technology, and more particularly to an improved direct-drive centrifugal fan, comprising a fan housing, a cylindrical outlet pipe connected to the outer side of the fan housing, a fixed ring fixedly installed at one end of the outlet pipe, a rotating ring rotatably installed inside the fixed ring, and multiple fixed shafts horizontally fixedly installed inside the rotating ring. Adjusting plates are rotatably installed on each of the multiple fixed shafts, and connecting rods are hinged to the sides of the multiple adjusting plates. Adjusting blocks are fixedly installed at the lower ends of the connecting rods, and a snap-fit ​​assembly is provided on the rotating ring. This utility model allows for adjustment of the tilt of the adjusting plates through the cooperation of the adjusting blocks, connecting rods, and snap-fit ​​assembly. Rotating the rotating ring then causes the multiple adjusting plates to rotate at one end of the outlet pipe, changing the airflow direction. The airflow direction can be adjusted 360° by rotating the rotating ring, improving the fan's applicability and ease of use under different operating conditions.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, and in particular to an improved direct-drive centrifugal fan. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. They are a type of driven fluid machinery. Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling, boilers and industrial furnaces for ventilation and induced draft, and air conditioning equipment and household appliances for cooling and ventilation.

[0003] Chinese patent CN217898229U discloses an improved direct-drive high-temperature centrifugal fan. In this improved direct-drive high-temperature centrifugal fan, a rotating connecting shaft with a circular hole drives an adjusting plate to rotate. Similarly, several other adjusting plates can be rotated to adjust each set of adjusting plates to the same tilt angle, thus blocking the air outlet and adjusting the direction of the airflow. After adjustment, a rotating shaft, in conjunction with a movable groove, rotates a fixed plate so that one side is parallel to the inner wall of the vertical groove. Then, a fixing pin, in conjunction with a fixing hole, fixes the position of the connecting shaft, thereby fixing the position of the adjusting plate. Through the above operations, the operator can adjust the direction of the airflow, making the use of the fan more convenient.

[0004] In the aforementioned patent documents, the direction of the wind is changed by adjusting the tilt of the adjustment plate. However, the tilt of the adjustment plate can only be adjusted up and down, so the direction of the wind can only be adjusted up and down. The adjustment range is limited and it cannot achieve adjustment in multiple directions, which makes the applicability and ease of use of the fan poor under different working conditions. Utility Model Content

[0005] The purpose of this utility model is to solve the following shortcomings in the existing technology: the direction of the wind is changed by adjusting the tilt of the adjustment plate. However, the tilt of the adjustment plate can only be adjusted up and down, so the direction of the wind can only be adjusted up and down. The adjustment range is limited and it cannot achieve adjustment in multiple directions, which makes the applicability and ease of use of the fan poor under different working conditions. Therefore, an improved direct-drive centrifugal fan is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An improved direct-drive centrifugal fan includes a fan housing, a motor mounted on one side of the fan housing, a cylindrical outlet pipe connected to the outer side of the fan housing, a fixed ring fixedly mounted at the end of the outlet pipe away from the fan housing, an annular groove formed on the inner side wall of the fixed ring, a rotating ring rotatably mounted in the annular groove, and a locking component for locking the rotating ring on the fixed ring; multiple fixed shafts are horizontally fixedly mounted inside the rotating ring, and adjusting plates are rotatably mounted on each of the multiple fixed shafts, with rotating holes penetrating the middle portions of both ends of the adjusting plates, the fixed shafts being inserted into the rotating holes, connecting rods hinged to the sides of the multiple adjusting plates, adjusting blocks fixedly mounted at the lower ends of the connecting rods, and a snap-fit ​​component for fixing the adjusting blocks on the rotating ring.

[0008] Preferably, the outer wall of the fixed ring has a circular hole communicating with the annular groove. The locking assembly includes a bracket fixedly installed on the outer wall of the fixed ring and a bolt threaded on the bracket. The bracket has a threaded hole aligned with the circular hole. The bolt is threaded into the threaded hole, and one end of the bolt passes through the circular hole and contacts the side of the rotating ring.

[0009] Preferably, the snap-fit ​​assembly includes an L-shaped positioning seat fixedly mounted on a rotating ring and a positioning rod slidably mounted on an adjusting block via an elastic component. The adjusting block has a horizontally opening movable hole, and the positioning rod is horizontally slidably inserted into the movable hole. The side of the positioning seat has a plurality of vertically equidistantly opening positioning holes, and one end of the positioning rod is inserted into the positioning hole.

[0010] Preferably, the elastic component includes a fixing block fixedly sleeved on the positioning rod and a telescopic spring sleeved on the positioning rod, with both ends of the telescopic spring fixedly connected to the adjusting block and the fixing block, respectively.

[0011] Preferably, a pull block is fixedly installed at the end of the positioning rod away from the positioning seat, and a rectangular hole is provided on the pull block.

[0012] Preferably, an anti-slip pad is fixedly installed on the outer wall of the rotating ring, and the anti-slip pad is made of rubber.

[0013] The beneficial effects of this utility model are as follows:

[0014] By adjusting the blocks, connecting rods, and snap-fit ​​components, the tilt of multiple adjusting plates can be adjusted to the desired air outlet angle. Then, by locking the components, rotating rings, and fixing rings, multiple adjusting plates are rotated at one end of the air outlet pipe, thereby changing the air outlet direction. The air outlet direction can be adjusted 360° by rotating the rotating ring, improving the applicability and ease of use of the fan under different operating conditions. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an improved direct-drive centrifugal fan proposed in this utility model;

[0016] Figure 2 A schematic diagram of a three-dimensional partial cross-sectional structure of a fixed ring, a rotating ring, an adjusting plate, a connecting rod, an adjusting block, and a snap-fit ​​assembly;

[0017] Figure 3 A partial three-dimensional structural diagram of the adjustment block and the snap-fit ​​assembly;

[0018] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0019] Figure 5 A three-dimensional structural diagram of a fixed ring, a rotating ring, and an adjusting plate when the air outlet direction is adjusted to a certain direction.

[0020] In the diagram: 1. Fan housing, 2. Motor, 3. Air outlet pipe, 4. Fixed ring, 5. Rotating ring, 6. Fixed shaft, 7. Adjusting plate, 8. Connecting rod, 9. Adjusting block, 10. Bolt, 11. Positioning seat, 12. Positioning rod, 13. Positioning hole, 14. Fixed block, 15. Telescopic spring, 16. Pull block, 17. Bracket. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-5 An improved direct-drive centrifugal fan includes a fan housing 1, a motor 2 mounted on one side of the fan housing 1, a cylindrical outlet pipe 3 connected to the outer side of the fan housing 1, a fixed ring 4 fixedly mounted at the end of the outlet pipe 3 away from the fan housing 1, an annular groove formed on the inner side wall of the fixed ring 4, a rotating ring 5 rotatably mounted in the annular groove, a locking component for locking the rotating ring 5 on the fixed ring 4, multiple fixed shafts 6 horizontally fixedly mounted inside the rotating ring 5, an adjusting plate 7 rotatably mounted on each of the multiple fixed shafts 6, a rotating hole penetrating the middle part of both ends of the adjusting plate 7, the fixed shafts 6 being inserted into the rotating holes, connecting rods 8 hinged to the sides of the multiple adjusting plates 7, adjusting blocks 9 fixedly mounted at the lower end of the connecting rods 8, and a snap-fit ​​component for fixing the adjusting blocks 9 on the rotating ring 5.

[0023] Multiple adjusting plates 7 are rotatably mounted inside the rotating ring 5 via a fixed shaft 6. When the adjusting block 9 is moved, the connecting rod 8 can simultaneously drive the multiple adjusting plates 7 to rotate on the fixed shaft 6, thereby adjusting the tilt of the adjusting plates 7. Adjusting the tilt of the adjusting plates 7 can change the angle of the air outlet direction. When the air outlet direction is adjusted to the required angle, the adjusting block 9 is fixed by the snap-fit ​​assembly. When adjusting the air outlet direction, the rotating ring 5 can be driven to rotate inside the fixed ring 4, thereby simultaneously driving the multiple adjusting plates 7 to rotate inside the fixed ring 4. When the adjusting plates 7 rotate, the air outlet direction of the air outlet pipe can be changed. The air outlet direction can be adjusted 360° by rotating the rotating ring 5, which improves the applicability and ease of use of the fan under different working conditions.

[0024] The outer wall of the fixed ring 4 has a circular hole communicating with the annular groove. The locking assembly includes a bracket 17 fixedly installed on the outer wall of the fixed ring 4 and a bolt 10 threaded on the bracket 17. The bracket 17 has a threaded hole aligned with the circular hole. The bolt 10 is threaded into the threaded hole, and one end of the bolt 10 passes through the circular hole and contacts the side of the rotating ring 5. The rotating ring 5 is rotatably installed in the annular groove on the inner side wall of the fixed ring 4. When one end of the bolt 10 contacts the side wall of the rotating ring 5, friction is generated between them. Under the action of friction, the rotating ring 5 can be restricted from rotating in the annular groove. When it is necessary to rotate the rotating ring 5, the bolt 10 is rotated by a wrench. Under the action of the threaded hole, the bolt 10 is driven to separate from the rotating ring 5. At this time, the locking of the rotating ring 5 is released, and the rotating ring 5 can be driven to rotate to adjust the air outlet direction. After the adjustment is completed, the bolt 10 is rotated in the opposite direction so that one end of the bolt 10 contacts the side wall of the rotating ring 5, which locks the rotating ring 5.

[0025] An anti-slip pad is fixedly installed on the outer wall of the rotating ring 5. The anti-slip pad is made of rubber. When one end of the bolt 10 contacts the side wall of the rotating ring 5, the anti-slip pad can increase the friction between the bolt 10 and the rotating ring 5, thus achieving a better locking effect on the rotating ring 5.

[0026] The snap-fit ​​assembly includes an L-shaped positioning seat 11 fixedly mounted on a rotating ring 5 and a positioning rod 12 slidably mounted on an adjusting block 9 via an elastic component. The adjusting block 9 has a horizontally opening movable hole, and the positioning rod 12 is horizontally slidably inserted into the movable hole. The side of the positioning seat 11 has a plurality of vertically equidistant positioning holes 13, and one end of the positioning rod 12 is inserted into the positioning hole 13. The elastic component includes a fixing block 14 fixedly sleeved on the positioning rod 12 and a telescopic spring 15 sleeved on the positioning rod 12. The two ends of the telescopic spring 15 are fixedly connected to the adjusting block 9 and the fixing block 14, respectively.

[0027] The positioning rod 12 is horizontally slidably mounted on the adjusting block 9. The telescopic spring 15 is in a compressed state. Under the action of the elastic force of the telescopic spring 15, the positioning rod 12 tends to move towards the positioning seat 11. When the adjusting block 9 is moved, multiple adjusting plates 7 can be rotated simultaneously through the connecting rod 8. Multiple positioning holes 13 opened on the positioning seat 11 correspond to different inclinations of the adjusting plates 7. After the inclination of the adjusting plate 7 is adjusted, the positioning rod 12 can be inserted into the corresponding positioning hole 13. The positioning rod 12 can fix the adjusting block 9, thereby fixing the multiple adjusting plates 7.

[0028] A pull block 16 is fixedly installed at the end of the positioning rod 12 away from the positioning seat 11. A rectangular hole is provided on the pull block 16. When it is necessary to adjust the tilt of the adjustment plate 7, the pull block 16 is pulled to move the positioning rod 12 away from the positioning seat 11 and remove one end of the positioning rod 12 from the positioning hole 13. The pull block 16 is designed to facilitate pulling the positioning rod 12.

[0029] In this invention, multiple adjusting plates 7 are rotatably mounted on the inner side of a rotating ring 5 via a fixed shaft 6. When the adjusting block 9 is moved, the connecting rod 8 can simultaneously drive the multiple adjusting plates 7 to rotate on the fixed shaft 6, thereby adjusting the tilt of the adjusting plates 7. Adjusting the tilt of the adjusting plates 7 can change the angle of the air outlet direction. When the air outlet direction is adjusted to the required angle, the adjusting block 9 is fixed by the snap-fit ​​assembly. When adjusting the air outlet direction, the rotating ring 5 can be driven to rotate inside the fixed ring 4, thereby simultaneously driving the multiple adjusting plates 7 to rotate inside the fixed ring 4. When the adjusting plates 7 rotate, the air outlet direction of the air outlet pipe can be changed. The air outlet direction can be adjusted 360° by rotating the rotating ring 5, improving the applicability and ease of use of the fan under different working conditions.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An improved direct drive centrifugal fan comprising a fan housing (1), characterized in that, A motor (2) is installed on one side of the fan housing (1). A cylindrical air outlet pipe (3) is connected to the outer side of the fan housing (1). A fixed ring (4) is fixedly installed at the end of the air outlet pipe (3) away from the fan housing (1). An annular groove is opened on the inner side wall of the fixed ring (4). A rotating ring (5) is rotatably installed in the annular groove. A locking component for locking the rotating ring (5) is provided on the fixed ring (4). Multiple fixed shafts (6) are horizontally fixedly installed in the rotating ring (5). Adjusting plates (7) are rotatably installed on each of the multiple fixed shafts (6). Rotating holes are opened through the middle part of both ends of the adjusting plates (7). The fixed shafts (6) are inserted into the rotating holes. Connecting rods (8) are hinged to the sides of the multiple adjusting plates (7). Adjusting blocks (9) are fixedly installed at the lower end of the connecting rods (8). A snap-fit ​​component for fixing the adjusting blocks (9) is provided on the rotating ring (5).

2. The improved direct coupled centrifugal fan as claimed in claim 1, wherein The outer wall of the fixed ring (4) is provided with a circular hole that communicates with the annular groove. The locking assembly includes a bracket (17) fixedly installed on the outer wall of the fixed ring (4) and a bolt (10) threaded on the bracket (17). The bracket (17) is provided with a threaded hole that is aligned with the circular hole. The bolt (10) is threadedly inserted into the threaded hole. One end of the bolt (10) passes through the circular hole and contacts the side of the rotating ring (5).

3. An improved direct-drive centrifugal fan according to claim 1, characterized in that, The snap-fit ​​assembly includes an L-shaped positioning seat (11) fixedly mounted on a rotating ring (5) and a positioning rod (12) slidably mounted on an adjusting block (9) via an elastic component. The adjusting block (9) has a horizontally opening movable hole, and the positioning rod (12) is horizontally slidably inserted into the movable hole. The side of the positioning seat (11) has a plurality of vertically equidistant positioning holes (13), and one end of the positioning rod (12) is inserted into the positioning hole (13).

4. An improved direct-drive centrifugal fan according to claim 3, characterized in that, The elastic component includes a fixing block (14) fixedly sleeved on the positioning rod (12) and a telescopic spring (15) sleeved on the positioning rod (12). The two ends of the telescopic spring (15) are fixedly connected to the adjusting block (9) and the fixing block (14) respectively.

5. An improved direct-drive centrifugal fan according to claim 4, characterized in that, A pull block (16) is fixedly installed at the end of the positioning rod (12) away from the positioning seat (11), and a rectangular hole is provided on the pull block (16).

6. An improved direct-drive centrifugal fan according to claim 1, characterized in that, An anti-slip pad is fixedly installed on the outer wall of the rotating ring (5), and the anti-slip pad is made of rubber.

Images