Novel centrifugal fan

Abstract

The utility model relates to the technical field of centrifugal fans, in particular to a novel centrifugal fan which comprises an annular fan upper cover and an annular fan lower cover, an annular groove is formed in the top side of the fan upper cover, a mounting ring is fixedly connected to the inner wall of the annular groove, and the fan lower cover is fixedly connected with the mounting ring. A transition fillet is formed between the annular groove and the mounting ring, and a plurality of ribs are fixedly connected to the top side of the mounting ring. The fan upper cover has the advantages that the mounting ring, the transition fillets, the ribs and the supporting cover are arranged in a matched mode, so that a unique bent angle sliding groove rib shape is formed on the fan upper cover; the appearance of the whole structure of the fan upper cover is guaranteed while the strength of the fan upper cover is guaranteed through the bent angle sliding groove rib modeling, the sizes of the first installation plate, the second installation plate and the third installation plate connected with the fan upper cover and the fan lower cover are different, the traditional proportion is broken through, and the symmetrical design is achieved; and an asymmetric unique mounting position is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a novel centrifugal fan. Background Art

[0002] A centrifugal fan is a common aerodynamic device. It generates centrifugal force through rotating blades to send gas to the outlet and is widely used in multiple fields. A centrifugal fan is needed in automotive seats to achieve the ventilation and heat dissipation operations of the seats. The working principle of the centrifugal fan in automotive seats is similar to that of ordinary centrifugal fans. When the fan starts, the motor drives the impeller to rotate. The curved design of the blades enables air to be quickly sucked into the fan interior. As the impeller rotates, the air is pushed towards the outlet of the fan under the action of centrifugal force, forming a strong air current. These air currents are then introduced into the ventilation layer of the seat and blown towards the driver and passengers through the small holes on the seat surface to achieve the ventilation and heat dissipation of the seat.

[0003] With the rapid development of automobiles, the products of cooling fans are constantly updated and iterated. Users have higher and higher requirements for the appearance design of cooling fan products. However, the appearance of existing products in the automotive seat cooling fan market is too single and in a proportional and symmetrical form, lacking features. Therefore, a novel centrifugal fan is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model aims to solve at least one of the above technical defects.

[0005] For this reason, an object of the utility model is to provide a novel centrifugal fan to solve the problems mentioned in the background art and overcome the deficiencies existing in the prior art.

[0006] To achieve the above object, an embodiment of one aspect of the utility model provides a novel centrifugal fan, including a fan upper cover with an annular shape and a fan lower cover with an annular shape. A circular groove is formed on the top side of the fan upper cover. An installation ring is fixedly connected to the inner wall of the circular groove. A transition fillet is formed between the circular groove and the installation ring. A plurality of ribs are fixedly connected to the top side of the installation ring. A support cover is fixedly connected to the top ends of the plurality of ribs. Two first mounting plates, second mounting plates, and third mounting plates are fixedly connected to the outer surfaces of the fan upper cover and the fan lower cover. Four support connection seats are fixedly connected to the top side of the fan lower cover. An impeller is installed at the middle position of the top side of the fan lower cover. A circular installation groove is formed on the bottom side of the fan lower cover. A circular spider web frame is fixedly connected to the inner wall of the circular installation groove. A shielding installation frame is fixedly connected to the bottom side of the fan lower cover.

[0007] Preferably, according to any of the above solutions, foot lift buckles are snap-fitted on the outer surfaces of the second mounting plate, the third mounting plate and the two first mounting plates. One end of each of the four foot lift buckles is fixedly connected to a silicone sleeve. The silicone sleeve is composed of a conical silicone cover and a silicone sheet, and the conical silicone cover corresponds to the position of the rib strips. A plurality of the rib strips are all located inside the conical silicone cover.

[0008] Preferably, according to any of the above solutions, the mounting ring and the upper fan cover are of an integral structure, the rib strips and the support cover are of an integral structure, and a plurality of the rib strips are distributed in a circular array on one side of the mounting ring.

[0009] Preferably, according to any of the above solutions, the shapes of the first mounting plate, the second mounting plate and the third mounting plate are all triangular. Rounded corners are provided at the ends of the first mounting plate, the second mounting plate and the third mounting plate, and the sizes of the first mounting plate, the second mounting plate and the third mounting plate are all different.

[0010] Preferably, according to any of the above solutions, the upper fan cover, the first mounting plate, the second mounting plate and the third mounting plate are of an integral structure, and the lower fan cover, the first mounting plate, the second mounting plate and the third mounting plate are of an integral structure.

[0011] Preferably, according to any of the above solutions, a connection hole is provided on the support connection seat. The two first mounting plates, the second mounting plate and the third mounting plate all correspond to the position of the support connection seat, and the upper fan cover and the lower fan cover are connected together through the first mounting plate, the second mounting plate, the third mounting plate and the support connection seat.

[0012] Preferably, according to any of the above solutions, the shielding mounting frame is composed of a circular plate and a rectangular plate. The circular plate in the shielding mounting frame shields the circular hole part of the lower fan cover. The shielding mounting frame is fixedly connected to the annular spider web frame, and a connection through hole is provided on one side of the circular plate in the shielding mounting frame.

[0013] Preferably, according to any of the above solutions, the outer diameters of the upper fan cover and the lower fan cover are both 95 mm, and the distance from the bottom side of the lower fan cover to the top side of the support cover is 28 mm.

[0014] Compared with the prior art, the advantages and beneficial effects of the present utility model are as follows:

[0015] 1. Through the combined setting of the mounting ring, transition fillet, rib and support cover, a unique bent corner chute rib shape is formed on the fan upper cover. The bent corner chute rib shape ensures the strength of the fan upper cover while guaranteeing the aesthetic appearance of the overall structure of the fan upper cover. Moreover, the sizes of the first mounting plate, second mounting plate and third mounting plate connected to the fan upper cover and the fan lower cover are all different, breaking the traditional proportional and symmetrical form design and forming a unique asymmetric mounting position.

[0016] 2. An annular spider web frame is provided on the fan lower cover, which not only makes the fan lower cover simple and beautiful, but also can increase the strength of the fan lower cover. This centrifugal fan has the characteristics of simple appearance, unique shape, fashionable appearance and modernization, which is convenient for popularization and use.

[0017] 3. The silicone sleeve is beneficial for shock-proof operation, thus greatly avoiding the influence of external vibration on the impeller and ensuring the service life of the impeller. And through the foot lift buckle, the silicone sleeve can be installed conveniently and quickly, improving the efficiency of installing and removing the silicone sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the first perspective structural schematic diagram of the present utility model;

[0019] Figure 2 is the second perspective structural schematic diagram of the present utility model;

[0020] Figure 3 is the exploded structural schematic diagram of the present utility model;

[0021] Figure 4 is the first perspective structural schematic diagram of the present utility model without the silicone sleeve assembled;

[0022] Figure 5 is the second perspective structural schematic diagram of the present utility model without the silicone sleeve assembled;

[0023] Figure 6 is the third perspective structural schematic diagram of the present utility model without the silicone sleeve assembled

[0024] Figure 7 is the overvoltage 32V protection circuit diagram of the present utility model.

[0025] In the figure: 1 - fan upper cover, 2 - fan lower cover, 3 - annular groove, 4 - mounting ring, 5 - transition fillet, 6 - rib, 7 - support cover, 8 - first mounting plate, 9 - second mounting plate, 10 - third mounting plate, 11 - support connection seat, 12 - impeller, 13 - annular mounting groove, 14 - annular spider web frame, 15 - shielding mounting frame, 16 - foot lift buckle, 17 - silicone sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the present utility model in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following description.

[0027] As Figures 1 to 7 shown, a new type of centrifugal fan includes a fan upper cover 1 in a ring shape and a fan lower cover 2 in a ring shape. A ring-shaped groove 3 is provided on the top side of the fan upper cover 1. An installation ring 4 is fixedly connected to the inner wall of the ring-shaped groove 3. The installation ring 4 is at the same center position as the fan upper cover 1. The inner diameter of the installation ring 4 is adapted to the inner diameter of the fan upper cover 1. A transition fillet 5 is formed between the ring-shaped groove 3 and the installation ring 4. Through the transition fillet 5, the installation ring 4 and the ring-shaped groove 3 form an integral structure, and the connection between the installation ring 4 and the ring-shaped groove 3 is made more firm. A plurality of rib strips 6 are fixedly connected to the top side of the installation ring 4. The rib strips 6 are in an arc shape, making the overall structure more beautiful. The top ends of the plurality of rib strips 6 are fixedly connected to a support cover 7. Two first mounting plates 8, second mounting plates 9, and third mounting plates 10 are fixedly connected to the outer surfaces of both the fan upper cover 1 and the fan lower cover 2. Four support connection seats 11 are fixedly connected to the top side of the fan lower cover 2. An impeller 12 is installed at the middle position of the top side of the fan lower cover 2. The impeller 12 is an existing technical structure. Wind power is generated by the rotation of the impeller 12. A ring-shaped installation groove 13 is provided on the bottom side of the fan lower cover 2. A ring-shaped spider web frame 14 is fixedly connected to the inner wall of the ring-shaped installation groove 13. A shielding installation frame 15 is fixedly connected to the bottom side of the fan lower cover 2. An air outlet is provided on the fan lower cover 2, enabling the heat dissipation air flow to be discharged from the air outlet. This centrifugal fan is provided with an overvoltage 32V protection circuit, which can protect the circuit when the voltage is relatively high during the operation of the centrifugal fan, thereby ensuring the normal operation of the centrifugal fan. The overvoltage 32V protection circuit includes resistors R4, R5, R6, R7, R8, R9, R10, and R11, capacitors C2, C3, and C4, a zener diode D2, a triode Q1, a power supply U2. The overvoltage 32V protection circuit is connected to the motor stator circuit that drives the impeller 12 to work. The motor stator circuit includes a power supply U1, resistors R1 and R2, a capacitor C1, an inductor L1. The schematic diagram of the connection between the overvoltage 32V protection circuit and the motor stator circuit is as Figure 4 shown.

[0028] As an alternative technical solution of the present utility model, foot lift buckles 16 are clamped on the outer surfaces of the second mounting plate 9, the third mounting plate 10 and the two first mounting plates 8. One end of the four foot lift buckles 16 is fixedly connected to a silica gel sleeve 17. The silica gel sleeve 17 is composed of a conical silica gel cover and a silica gel sheet, and the conical silica gel cover corresponds to the position of the rib 6. A plurality of ribs 6 are all located inside the conical silica gel cover. The silica gel sleeve 17 can be conveniently and quickly installed through the foot lift buckle 16. The silica gel sleeve 17 is beneficial for shockproof operation, thereby greatly avoiding the influence of external vibration on the impeller 12 and ensuring the service life of the impeller 12.

[0029] As an alternative technical solution of the present utility model, the mounting ring 4 and the fan upper cover 1 are of an integral structure, and the rib 6 and the support cover 7 are of an integral structure. A plurality of ribs 6 are distributed in a circumferential array on one side of the mounting ring 4. The connection stability between the mounting ring 4 and the support cover 7 can be ensured through the rib 6, and the strength of the fan upper cover 1 can be ensured through the rib 6 and the support cover 7.

[0030] As an alternative technical solution of the present utility model, the shapes of the first mounting plate 8, the second mounting plate 9 and the third mounting plate 10 are all triangular. Rounded corners are provided at the ends of the first mounting plate 8, the second mounting plate 9 and the third mounting plate 10. The sizes of the first mounting plate 8, the second mounting plate 9 and the third mounting plate 10 are all different. A unique asymmetric mounting position is formed by the first mounting plate 8, the second mounting plate 9 and the third mounting plate 10, breaking the traditional symmetric mounting method.

[0031] As an alternative technical solution of the present utility model, the fan upper cover 1, the first mounting plate 8, the second mounting plate 9 and the third mounting plate 10 are of an integral structure, ensuring the aesthetics of the fan upper cover 1 and its connecting components. The fan lower cover 2, the first mounting plate 8, the second mounting plate 9 and the third mounting plate 10 are of an integral structure, ensuring the aesthetics of the fan lower cover 2 and its connecting components.

[0032] As an alternative technical solution of the present utility model, a connection hole is provided on the support connection seat 11. The two first mounting plates 8, the second mounting plate 9 and the third mounting plate 10 all correspond to the position of the support connection seat 11. The fan upper cover 1 and the fan lower cover 2 are connected together through the first mounting plate 8, the second mounting plate 9, the third mounting plate 10 and the support connection seat 11.

[0033] As an alternative technical solution of the present utility model, the shielding mounting bracket 15 is composed of a circular plate and a rectangular plate. The circular plate in the shielding mounting bracket 15 shields the circular hole part of the fan lower cover 2. The shielding mounting bracket 15 is fixedly connected to the annular spider web bracket 14. A connection through hole is provided on one side of the circular plate in the shielding mounting bracket 15, which facilitates the motor shaft driving the impeller 12 to pass through and be connected to the impeller 12. And the motor connected to the impeller 12 is a DC motor, which can also be called a DC motor. When selecting a DC motor, the DC motor has a PWM speed regulation function, so as to realize precise control of the impeller 12.

[0034] As an alternative technical solution of the present utility model, the outer diameters of the fan upper cover 1 and the fan lower cover 2 are both 95 mm, and the distance from the bottom side of the fan lower cover 2 to the top side of the support cover 7 is 28 mm.

[0035] In summary, for this new type of centrifugal fan, through the combined setting of the mounting ring 4, the transition fillet 5, the rib 6 and the support cover 7, a unique corner chute rib shape is formed on the fan upper cover 1. While ensuring the strength of the fan upper cover 1, the overall structure beauty of the fan upper cover 1 is guaranteed by the corner chute rib shape. And the sizes of the first mounting plate 8, the second mounting plate 9 and the third mounting plate 10 connected to the fan upper cover 1 and the fan lower cover 2 are all different, breaking the traditional proportional and symmetrical form design and forming an asymmetric unique mounting position. An annular spider web bracket 14 is provided on the fan lower cover 2, which not only makes the fan lower cover 2 simple and beautiful, but also can increase the strength of the fan lower cover 2. This centrifugal fan has the characteristics of simple appearance, unique shape, fashionable appearance and modernization, which is convenient for popularization and use. The silicone sleeve 17 is beneficial to shockproof operation, so as to greatly avoid the influence of external vibration on the impeller 12 and ensure the service life of the impeller 12. And the silicone sleeve 17 can be installed conveniently and quickly through the foot lift buckle 16, improving the installation and disassembly efficiency of the silicone sleeve 17.

Claims

1. A new type of centrifugal fan, characterized in that: It includes a fan upper cover (1) in a ring shape and a fan lower cover (2) in a ring shape. A ring-shaped groove (3) is formed on the top side of the fan upper cover (1). An installation ring (4) is fixedly connected to the inner wall of the ring-shaped groove (3). A transition fillet (5) is formed between the ring-shaped groove (3) and the installation ring (4). A plurality of rib strips (6) are fixedly connected to the top side of the installation ring (4). The top ends of the plurality of rib strips (6) are fixedly connected to a support cover (7). Two first mounting plates (8), second mounting plates (9), and third mounting plates (10) are fixedly connected to the outer surfaces of both the fan upper cover (1) and the fan lower cover (2). Four support connection seats (11) are fixedly connected to the top side of the fan lower cover (2). An impeller (12) is installed at the middle position of the top side of the fan lower cover (2). A ring-shaped installation groove (13) is formed on the bottom side of the fan lower cover (2). A ring-shaped spider web frame (14) is fixedly connected to the inner wall of the ring-shaped installation groove (13). A shielding installation frame (15) is fixedly connected to the bottom side of the fan lower cover (2).

2. The novel centrifugal fan according to claim 1, wherein: Foot lift buckles (16) are snap-connected to the outer surfaces of the second mounting plate (9), the third mounting plate (10), and the two first mounting plates (8). One end of each of the four foot lift buckles (16) is fixedly connected to a silica gel sleeve (17). The silica gel sleeve (17) consists of a conical silica gel cover and a silica gel sheet, and the conical silica gel cover corresponds to the position of the rib strips (6). The plurality of rib strips (6) are located inside the conical silica gel cover.

3. A novel centrifugal fan according to claim 2, characterized in that: The installation ring (4) and the fan upper cover (1) are of an integral structure. The rib strips (6) and the support cover (7) are of an integral structure. The plurality of rib strips (6) are distributed in a circumferential array on one side of the installation ring (4).

4. A novel centrifugal fan according to claim 3, characterized in that: The shapes of the first mounting plate (8), the second mounting plate (9), and the third mounting plate (10) are all triangular. Rounded corners are provided at the ends of the first mounting plate (8), the second mounting plate (9), and the third mounting plate (10). The sizes of the first mounting plate (8), the second mounting plate (9), and the third mounting plate (10) are all different.

5. A novel centrifugal fan according to claim 4, characterized in that: The fan upper cover (1), the first mounting plate (8), the second mounting plate (9), and the third mounting plate (10) are of an integral structure. The fan lower cover (2), the first mounting plate (8), the second mounting plate (9), and the third mounting plate (10) are of an integral structure.

6. A novel centrifugal fan according to claim 5, characterized in that: Connection holes are formed in the support connection seats (11). The two first mounting plates (8), the second mounting plate (9), and the third mounting plate (10) all correspond to the positions of the support connection seats (11). The fan upper cover (1) and the fan lower cover (2) are connected together through the first mounting plate (8), the second mounting plate (9), the third mounting plate (10), and the support connection seats (11).

7. A novel centrifugal fan according to claim 6, wherein: The shielding mounting bracket (15) is composed of a circular plate and a rectangular plate. The circular plate in the shielding mounting bracket (15) shields the circular hole part of the lower fan cover (2). The shielding mounting bracket (15) is fixedly connected to the annular spider frame (14). A connecting through hole is provided on one side of the circular plate in the shielding mounting bracket (15).

8. A novel centrifugal fan according to claim 7, characterized in that: The outer diameters of both the upper fan cover (1) and the lower fan cover (2) are 95 mm, and the distance from the bottom side of the lower fan cover (2) to the top side of the support cover (7) is 28 mm.

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