Centrifugal fan, vehicle wireless charging device and vehicle

Abstract

The utility model discloses a centrifugal fan, vehicle wireless charging device and vehicle, centrifugal fan includes shell, motor and fan blade, and the inside of shell is equipped with installation cavity, and motor and fan blade are located in the installation cavity, and the shell includes roof, and the tail of motor is connected with roof, and the power output part of fan blade is connected with motor. The utility model discloses through the tail of motor is directly connected with the roof of shell, and the head of motor is downward, and the use of inner shell is omitted, and the height space is saved, and when satisfying the overall height demand of centrifugal fan of vehicle wireless charging, the problem that the use of inner shell can cause the hindering of flow channel is avoided, and then the heat dissipation efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a centrifugal fan, a vehicle-mounted wireless charging device, and a vehicle. Background Technology

[0002] With the booming new energy industry, there are many types of wireless charging for vehicles. Currently, there are problems with the compatibility of traditional centrifugal fans with vehicle wireless charging. The main reason is that the internal components of the centrifugal fan first fit with the inner shell of the centrifugal fan, and then the inner shell fits with the outer shell of the centrifugal fan. Under height restrictions, this design of centrifugal fan will obstruct the flow channel, resulting in a significant reduction in heat dissipation performance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a centrifugal fan, a vehicle wireless charging device, and a vehicle, which aims to improve the heat dissipation performance when the centrifugal fan is used in conjunction with the vehicle wireless charger.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this utility model provides a centrifugal fan, including a housing, a motor, and fan blades. The housing has an internal mounting cavity, and the motor and the fan blades are disposed in the mounting cavity. The housing includes a top plate, the tail end of the motor is connected to the top plate, and the fan blades are connected to the power output part of the motor.

[0006] Furthermore, the motor includes a sleeve, an oil-impregnated bearing, a stator assembly, and a shaft core. The upper end of the sleeve is fixedly connected to the top plate. The stator assembly is located outside the sleeve. The oil-impregnated bearing is positioned inside the sleeve. The shaft core is located within the inner diameter of the oil-impregnated bearing. The fan blade is connected to the lower end of the shaft core.

[0007] Furthermore, the motor also includes a positioning cover and a retaining ring, the oil-impregnated bearing is axially limited between the positioning cover and the retaining ring, and the retaining ring is located at the upper end of the oil-impregnated bearing, while the positioning cover is located at the lower end of the oil-impregnated bearing.

[0008] Furthermore, the motor also includes a gasket, which is disposed between the upper end of the sleeve and the shaft.

[0009] Furthermore, the gasket is made of graphite.

[0010] Secondly, this utility model also provides a vehicle-mounted wireless charging device, including a vehicle-mounted wireless charging module and the aforementioned centrifugal fan, wherein the vehicle-mounted wireless charging module is disposed below the centrifugal fan.

[0011] Furthermore, the bottom of the housing is open, and the bottom of the housing is connected to the vehicle wireless charging module.

[0012] Furthermore, the vehicle-mounted wireless charging module includes a housing, the upper surface of which is fixedly connected to the bottom of the outer shell.

[0013] Thirdly, this utility model also provides a vehicle including the aforementioned vehicle-mounted wireless charging device.

[0014] The advantages of this invention compared to existing technologies are as follows: A centrifugal fan includes a housing, a motor, and fan blades. The housing has an internal mounting cavity where the motor and fan blades are housed. The housing includes a top plate, the tail of the motor is connected to the top plate, and the fan blades are connected to the motor's power output section. This invention eliminates the need for an inner housing by directly connecting the tail of the motor to the top plate of the housing, with the motor head facing downwards. This saves height space and meets the overall height requirements of in-vehicle wireless charging for centrifugal fans while avoiding the obstruction of airflow caused by an inner housing, thus significantly improving heat dissipation efficiency.

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a centrifugal fan provided for a specific embodiment of this utility model;

[0018] Figure 2 A schematic diagram of the structure of a vehicle-mounted wireless charging device provided in a specific embodiment of this utility model;

[0019] Figure 3 An exploded view of a vehicle-mounted wireless charging device provided in a specific embodiment of this utility model;

[0020] Figure 4 This is a cross-sectional view of a vehicle-mounted wireless charging device provided for a specific embodiment of the present utility model.

[0021] Figure Labels

[0022] 1. Centrifugal fan; 11. Housing; 12. Fan blade; 13. Sleeve; 14. Stator assembly; 15. Oil-impregnated bearing; 16. Shaft core; 17. Positioning cover; 18. Buckle; 19. Gasket; 2. Vehicle wireless charging module; 21. Housing. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] like Figures 1 to 4 As shown, this utility model embodiment provides a centrifugal fan 1, including a housing 11, a motor and a fan blade 12. The housing 11 has an internal mounting cavity, in which the motor and the fan blade 12 are located. The housing 11 includes a top plate, the tail of the motor is connected to the top plate, and the fan blade 12 is connected to the power output part of the motor.

[0030] In actual manufacturing, the outer casing 11 can be made of plastic material with certain strength and rigidity, and manufactured through injection molding. Such material and molding process not only ensure the structural stability of the outer casing 11, but also facilitate large-scale production and reduce production costs. For example, polycarbonate (PC) material can be selected, and the outer casing 11 of the centrifugal fan 1 can be molded in one piece using an injection mold.

[0031] The motor includes a sleeve 13, an oil-impregnated bearing 15, a stator assembly 14, a shaft core 16, a positioning cover 17, a retaining ring 18, and a gasket 19. The sleeve 13 is a hollow cylindrical structure, with its upper end fixedly connected to a top plate. The connection can be achieved through snap-fit, adhesive bonding, or screw connection. Taking a screw connection as an example, mounting holes adapted to the sleeve 13 are pre-set on the top plate, and threaded holes are provided at the upper end of the sleeve 13. The sleeve 13 is then securely fixed to the top plate with screws, ensuring that the motor will not loosen during operation. The stator assembly 14 is located outside the sleeve 13 and consists of a stator core and coils wound around the core. The stator core is made of laminated silicon steel sheets, which have excellent magnetic permeability, effectively reducing hysteresis and eddy current losses and improving motor efficiency. The oil-impregnated bearing 15 is positioned within the sleeve 13. The oil-impregnated bearing 15 contains lubricating oil, providing excellent lubrication for the rotation of the shaft core 16, reducing frictional resistance, and extending the motor's service life. The shaft core 16 is located within the inner diameter of the oil-impregnated bearing 15, and its lower end is connected to the fan blade 12. The shaft core 16 is made of high-strength metal materials, such as stainless steel, to ensure it can withstand the torque and centrifugal force generated when the fan blade 12 rotates.

[0032] The oil-impregnated bearing 15 is axially limited between the positioning cover 17 and the retaining ring 18, with the retaining ring 18 located at the upper end of the oil-impregnated bearing 15 and the positioning cover 17 located at the lower end of the oil-impregnated bearing 15. During assembly, the oil-impregnated bearing 15 is first placed inside the sleeve 13, and then the positioning cover 17 is installed at the lower end of the sleeve 13 to axially limit the oil-impregnated bearing 15 and prevent it from moving downwards. Next, the retaining ring 18 is installed at the upper end of the sleeve 13 to upwardly limit the oil-impregnated bearing 15, thereby ensuring that the oil-impregnated bearing 15 is fixed in position within the sleeve 13. In addition, the motor also includes a gasket 19, which is disposed between the upper end of the sleeve 13 and the shaft core 16. The gasket 19 is made of graphite, which has good self-lubricating properties and wear resistance, further reducing friction between the shaft core 16 and the sleeve 13, and also providing a certain buffering effect, reducing vibration and noise generated during motor operation.

[0033] The fan blade 12 is connected to the lower end of the motor shaft 16. The fan blade 12 can be forward-curved, backward-curved, or radial in shape. Taking a forward-curved fan blade 12 as an example, its blade shape is forward-curved, which can generate greater wind pressure and air volume at the same rotational speed, making it suitable for applications requiring high ventilation performance. In terms of connection methods, the fan blade 12 and the shaft 16 can be fixed together by key connection, pin connection, or interference fit. For example, when using a key connection, a keyway is machined at the lower end of the shaft 16, and a matching keyway is machined at the center hole of the fan blade 12. The key is installed in the keyway, and then the fan blade 12 is fitted onto the shaft 16, so that the key is embedded in the keyway of the fan blade 12, thereby achieving a reliable connection between the fan blade 12 and the shaft 16.

[0034] By directly connecting the tail of the motor to the top plate of the outer casing 11, with the motor head facing downwards, the use of an inner casing is eliminated. This effectively meets the strict height requirements of the centrifugal fan 1 for in-vehicle wireless charging, making the design of the in-vehicle wireless charging device more compact and better adaptable to the limited space layout inside the vehicle. Eliminating the inner casing avoids the problem of obstructing the airflow channel that would occur with an inner casing. In practical applications, under the same operating conditions, the heat dissipation efficiency of this centrifugal fan 1 is significantly improved compared to a traditional centrifugal fan 1 with an inner casing. This is particularly important for in-vehicle wireless charging devices, as they generate a large amount of heat during operation. Efficient heat dissipation ensures the stable operation of the in-vehicle wireless charging module 2, extends its service life, and improves the safety and reliability of the in-vehicle wireless charging device.

[0035] like Figures 1 to 4 As shown, this utility model embodiment also provides a vehicle-mounted wireless charging device, including a vehicle-mounted wireless charging module 2 and the centrifugal fan 1 mentioned above, with the vehicle-mounted wireless charging module 2 located below the centrifugal fan 1.

[0036] In one embodiment, the bottom of the housing 11 of the centrifugal fan 1 is open, and the bottom of the housing 11 is connected to the vehicle wireless charging module 2. Specifically, the vehicle wireless charging module 2 includes a housing 21, and the upper surface of the housing 21 is fixedly connected to the bottom of the housing 11. The connection can take various forms. Taking screw connection as an example, multiple threaded holes are pre-drilled at the bottom of the housing 11, and mounting holes are provided at corresponding positions on the upper surface of the housing 21 of the vehicle wireless charging module 2. Screws are passed through the mounting holes and screwed into the threaded holes to securely fix the two together.

[0037] The centrifugal fan 1's motor and blades 12 generate airflow during operation to dissipate heat from the in-vehicle wireless charging module 2 below. Due to the unique design of the centrifugal fan 1's motor connection to the housing 11 (the motor's tail is connected to the top plate, with the head facing downwards), the airflow can be directed more smoothly towards the in-vehicle wireless charging module 2. For example, when the in-vehicle wireless charging module 2 generates heat while charging a mobile phone, the centrifugal fan 1 starts, and the airflow generated by the rotating blades 12 blows out from the bottom of the housing 11, directly acting on the surface of the housing 21 of the in-vehicle wireless charging module 2, carrying away heat and ensuring the normal operating temperature of the electronic components inside the module.

[0038] It should be noted that the vehicle-mounted wireless charging device provided in this embodiment includes the centrifugal fan 1 mentioned above. Therefore, the vehicle-mounted wireless charging device has all the beneficial effects of the centrifugal fan 1 mentioned above, which will not be repeated here.

[0039] Furthermore, the bottom of the outer casing 11 is open, and the bottom of the outer casing 11 is connected to the vehicle wireless charging module 2. This design allows the airflow generated by the centrifugal fan 1 to directly act on the surface of the vehicle wireless charging module 2, avoiding the obstruction of airflow by the traditional closed structure.

[0040] This utility model embodiment also provides a vehicle, including the above-described vehicle-mounted wireless charging device.

[0041] It should be noted that the vehicle provided in this embodiment of the invention includes the above-mentioned in-vehicle wireless charging device, and therefore the vehicle has all the beneficial effects of the above-mentioned in-vehicle wireless charging device, which will not be repeated here.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A centrifugal fan, characterized in that, The device includes a housing, a motor, and fan blades. The housing has an internal mounting cavity where the motor and fan blades are housed. The housing includes a top plate, the tail end of the motor is connected to the top plate, and the fan blades are connected to the motor's power output section. The motor includes a sleeve, an oil-impregnated bearing, a stator assembly, and a shaft. The upper end of the sleeve is fixedly connected to the top plate, the stator assembly is located outside the sleeve, the oil-impregnated bearing is positioned within the sleeve, the shaft is located within the inner diameter of the oil-impregnated bearing, and the fan blades are connected to the lower end of the shaft. The motor also includes a positioning cover and a retaining ring. The oil-impregnated bearing is axially limited between the positioning cover and the retaining ring, with the retaining ring located at the upper end of the oil-impregnated bearing and the positioning cover at the lower end of the oil-impregnated bearing.

2. A centrifugal fan according to claim 1, characterized in that, The motor also includes a gasket, which is disposed between the upper end of the sleeve and the shaft.

3. A centrifugal fan according to claim 2, characterized in that, The gasket is made of graphite.

4. A vehicle-mounted wireless charging device, characterized in that, The invention includes an in-vehicle wireless charging module and a centrifugal fan as described in any one of claims 1-3, wherein the in-vehicle wireless charging module is disposed above the centrifugal fan.

5. A vehicle-mounted wireless charging device according to claim 4, characterized in that, The bottom of the housing is open, and the bottom of the housing is connected to the vehicle wireless charging module.

6. A vehicle-mounted wireless charging device according to claim 5, characterized in that, The vehicle-mounted wireless charging module includes a housing, the upper surface of which is fixedly connected to the bottom of the outer shell.

7. A vehicle, characterized in that, Includes the vehicle-mounted wireless charging device as described in any one of claims 4-6.

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