Fan with protective structure

Abstract

The fan with the protection structure comprises an upper shell and a lower shell which are connected with each other, a mounting cavity is formed between the upper shell and the lower shell, a circuit board, a motor arranged on the circuit board and an impeller driven by the motor are arranged in the mounting cavity, and an air inlet communicating with the mounting cavity and the external environment in the axial direction of the impeller is formed in the upper shell; the circumferential end of the upper shell extends towards one side of the lower shell, the edge of the upper shell covers the lower shell, and an air outlet channel communicating with the air inlet through the mounting cavity is formed in the periphery of the impeller. The circumferential end of the upper shell extends towards one side of the lower shell to form the air outlet channel, on the basis that normal air outlet of the fan is guaranteed, the extending part of the upper shell forms a protection structure on the periphery of the impeller, the impeller can be prevented from being damaged by collision in the fan taking or installing process, the impeller can be effectively wrapped in the fan, and the service life of the fan is prolonged. The device is separated from the outside, and potential safety hazards are avoided.

Description

Technical Field

[0001] This application relates to the field of fan technology, and more particularly to a fan with a protective structure. Background Technology

[0002] In recent years, with the technological development in the vehicle transportation field, people's requirements for vehicle ride comfort have been increasing, and seats with ventilation functions have become a new type of product that is gradually being accepted. In recent years, seat air conditioning and ventilation devices have been gradually recognized by the market as a high-end application of vehicle comfort adjustment systems. In seat ventilation systems, the fan power module generally adopts a centrifugal fan with axial air intake and side air exhaust. This type of fan can simply and effectively push air to the outer periphery of the impeller, but its air outlet structure is relatively simple, with the circumferential edge of the impeller located near the air outlet and without any obstruction, which makes the impeller easy to be damaged or poses a safety hazard during the handling or operation of the fan. Utility Model Content

[0003] The purpose of this application is to address the above problems by providing a fan with a protective structure, including an upper housing and a lower housing connected to each other, forming a mounting cavity between the upper housing and the lower housing. The mounting cavity contains a circuit board, a motor mounted on the circuit board, and an impeller driven by the motor. The upper housing has an air inlet that communicates with the mounting cavity and the external environment along the axial direction of the impeller. The circumferential end of the upper housing extends towards the lower housing and its edge covers the lower housing. An air outlet channel is formed on the outer periphery of the impeller, communicating with the air inlet through the mounting cavity.

[0004] According to the technical solutions provided in certain embodiments of this application, the air outlet channel includes:

[0005] First air outlet;

[0006] A connecting port, which communicates with the mounting cavity;

[0007] A flow cavity, which connects the first air outlet, the second air outlet, and the connecting port.

[0008] According to the technical solutions provided in certain embodiments of this application, the air outlet channel further includes a second air outlet, which is connected to the first air outlet and the connecting port through the flow cavity.

[0009] According to the technical solutions provided in certain embodiments of this application, a plurality of first air outlets are formed between the circumferential end of the upper housing and the circumferential end of the lower housing.

[0010] According to the technical solutions provided in certain embodiments of this application, the upper housing has a bend corresponding to the position of the flow cavity, and the bend has a plurality of through holes, which form the second air outlet.

[0011] According to the technical solutions provided in certain embodiments of this application, a plurality of the through holes are opened along the radial direction of the impeller.

[0012] According to the technical solutions provided in certain embodiments of this application, the bending portion has an arc-shaped surface structure on the side near the flow cavity.

[0013] According to the technical solutions provided in certain embodiments of this application, a plurality of through holes are distributed in a ring array on the bending part with the impeller rotation axis as the center.

[0014] According to the technical solutions provided in some embodiments of this application, an interface structure is provided on the upper housing corresponding to the air inlet, and the interface structure is used to connect the air inlet pipe.

[0015] According to the technical solutions provided in certain embodiments of this application, a power supply interface is provided on the lower housing, and the power supply interface is electrically connected to the motor.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a fan with a protective structure, including an upper housing and a lower housing connected to each other, forming a mounting cavity between the upper housing and the lower housing. The mounting cavity contains a circuit board, a motor mounted on the circuit board, and a motor-driven impeller. An air inlet is provided on the upper housing, which connects the mounting cavity to the external environment along the axial direction of the impeller. The circumferential end of the upper housing extends to the side of the lower housing and its edge covers the lower housing, forming an air outlet channel on the outer periphery of the impeller that connects to the air inlet through the mounting cavity. By extending the circumferential end of the upper housing to the side of the lower housing to form an air outlet channel, while ensuring that the fan can output air normally, the extended part of the upper housing forms a protective structure on the outer periphery of the impeller. This can prevent the impeller from being damaged by collision during the handling or installation of the fan, and can also effectively enclose the impeller inside and separate it from the outside, avoiding potential safety hazards.

[0017] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a centrifugal fan in the prior art;

[0020] Figure 2 A schematic diagram of the structure of a fan with a protective structure provided in this application embodiment, showing the first air outlet;

[0021] Figure 3 A cross-sectional structural diagram of a fan with a protective structure provided in this application embodiment when a first air outlet is provided;

[0022] Figure 4-6 This is a schematic diagram of the structure of a fan with a protective structure provided in this application embodiment, with a first air outlet and a second air outlet;

[0023] Figure 7 This is a cross-sectional structural diagram of a fan with a protective structure provided in this application embodiment, with a first air outlet and a second air outlet.

[0024] The text labels in the image represent:

[0025] 1. Upper casing; 2. Lower casing; 3. Impeller; 4. Mounting cavity; 5. Power supply interface; 11. Air inlet; 12. First air outlet; 13. Second air outlet; 14. Flow cavity; 15. Bend; 16. Interface structure. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this invention.

[0027] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0028] As mentioned in the background section, in order to solve the problems in the prior art, this application provides a fan with a protective structure, including an upper housing 1 and a lower housing 2 connected to each other. An installation cavity 4 is formed between the upper housing 1 and the lower housing 2. A circuit board, a motor and an impeller 3 driven by the motor are provided in the installation cavity 4. An air inlet 11 is provided on the upper housing 1, which communicates with the installation cavity 4 and the external environment along the axial direction of the impeller 3. The circumferential end of the upper housing 1 extends to the side of the lower housing 2 and its edge covers the lower housing. An air outlet channel is formed on the outer periphery of the impeller 3, which communicates with the air inlet 11 through the installation cavity 4.

[0029] Figure 1 In existing centrifugal fans with axial inlet and radial outlet, the outlet is located circumferentially, and the circumferential edge of the impeller 3 is located at the outlet, directly exposing the impeller 3 to the outside of the fan housing. This makes the impeller 3 susceptible to collision damage during handling or installation, and also poses a safety hazard during operation, as it is prone to colliding with other adjacent structures. The fan with a protective structure described in this application... Figure 2-7As shown, the upper shell 1 is approximately a "bowl-shaped" cover structure, and the lower shell 2 is approximately a circular planar structure. Both the upper shell 1 and the lower shell 2 have protruding connecting parts with connecting holes. By passing bolts through the corresponding two connecting holes on the upper shell 1 and the lower shell 2 simultaneously, a fixing point can be formed, connecting the upper shell 1 and the lower shell 2. An installation cavity 4 is formed between the upper shell 1 and the lower shell 2 along their axial direction. The circuit board, motor, and impeller 3 are all located in the installation cavity 4. The motor is located on the circuit board. An air inlet 11 is provided on the upper shell 1, and an air outlet channel is formed on the outer periphery of the impeller 3. The motor can drive the impeller 3 to rotate, so that the gas enters the installation cavity 4 from the air inlet 11 along the axial direction of the impeller 3, and is output along the radial direction of the impeller 3 through the air outlet channel under the drive of the impeller 3.

[0030] By extending the circumferential end of the upper housing 1 to the side of the lower housing 2 to form an air outlet channel, while ensuring that the fan can output air normally, the extended part of the upper housing 1 forms a protective structure on the outer periphery of the impeller 3. This can prevent the impeller 3 from being damaged by collision during the handling or installation of the fan, and can also effectively wrap the impeller 3 inside and separate it from the outside, avoiding any safety hazards.

[0031] In a preferred embodiment, the air outlet duct includes:

[0032] First air outlet 12;

[0033] The connecting port is connected to the mounting cavity 4;

[0034] The flow cavity 14 is connected to the first air outlet 12, the second air outlet 13 and the connecting port.

[0035] like Figure 3 As shown, after the gas enters the mounting cavity 4 through the air inlet 11 along the axial direction of the impeller 3, it can enter the flow cavity 14 through the connecting port under the drive of the impeller 3, and finally be output from the first air outlet 12.

[0036] In a preferred embodiment, the air outlet channel further includes a second air outlet 13, which is connected to the first air outlet 12 and the connecting port through the flow cavity 14.

[0037] like Figure 7 As shown, a second air outlet is also provided. The second air outlet can increase the air outlet path of the fan and avoid the impact of changes in the overall structure of the fan on the air volume.

[0038] In a preferred embodiment, a plurality of first air outlets 12 are formed between the circumferential end of the upper housing 1 and the circumferential end of the lower housing 2.

[0039] like Figure 2 and Figure 3As shown, multiple arc-shaped first air outlets 12 are formed between the circumferential end of the upper housing 1 and the circumferential end of the lower housing 2. Part of the gas driven by the impeller 3 can enter the flow chamber 14 radially along the impeller 3 and be output from the multiple first air outlets 12 under the guidance of the flow chamber 14.

[0040] In a preferred embodiment, the upper housing 1 has a bend 15 at the position corresponding to the flow cavity 14, and the bend 15 has a plurality of through holes forming a second air outlet 13.

[0041] In a preferred embodiment, a plurality of through holes are formed radially along the impeller 3.

[0042] like Figure 4-6 As shown, multiple through holes are opened on the upper housing 1 at positions corresponding to the circumference of the impeller 3. After part of the gas driven by the impeller 3 enters the flow chamber 14 radially along the impeller 3, it can maintain its original flow direction and be output through multiple second air outlets 13. Furthermore, the through holes can also be arc-shaped hole structures opened along the extension direction of the bend 15 to increase the flow area of ​​the second air outlet 13. By setting the first air outlet 12 and the second air outlet 13, the gas backflow caused by the bend 15 can be reduced on the basis of the protective structure formed by the bend 15 of the upper housing 1 against the impeller 3, so as to maintain the flow direction and flow rate of the gas as much as possible, and improve the air output efficiency and performance of the fan.

[0043] In a preferred embodiment, the bending portion 15 has an arc-shaped surface structure on the side near the flow cavity 14.

[0044] like Figure 3 and Figure 7 As shown, the side of the bending section 15 near the flow cavity 14 has an arc-shaped surface structure, which can minimize the wind resistance of the gas driven by the impeller 3 into the flow cavity 14, and further reduce the air outlet loss of the fan.

[0045] In a preferred embodiment, a plurality of through holes are arranged in a ring array on the bending section 15 with the impeller 3 rotation axis as the center.

[0046] like Figure 4-6 As shown, the through holes can take various shapes. The projection of the through holes along the radial direction of the impeller 3 can be rectangular, circular, elliptical, or other shapes that can satisfy the side air outlet of the fan. Multiple through holes between two adjacent fixed points are evenly distributed on the bending part 15 to ensure that the gas can be evenly discharged through multiple second air outlets 13 under the drive of the impeller 3.

[0047] In a preferred embodiment, an interface structure 16 is provided on the upper housing 1 at the air inlet 11, and the interface structure 16 is used to connect the air inlet duct.

[0048] like Figure 4-6As shown, the interface structure 16 is arranged around the air inlet 11. The interface structure 16 includes a snap-fit ​​part extending away from the impeller 3. The snap-fit ​​part is used to snap-fit ​​with the air inlet duct, thereby fixing the fan to the air inlet duct. In other embodiments of this application, the interface structure 16 can also adopt other connection methods, which are not specifically limited here.

[0049] In a preferred embodiment, the lower housing 2 is provided with a power supply interface 5, which is electrically connected to the motor.

[0050] like Figure 4-6 As shown, the power supply interface 5 is located on the lower housing 2. It can be integrally formed with the lower housing 2 by injection molding, or it can be fixed to the lower housing 2 by welding, snap-fitting or bonding. The power supply interface 5 is electrically connected to the motor. When the fan is installed, the vehicle control module can be connected to the power supply interface 5 through the wiring harness to realize the power supply and control of the fan.

[0051] Working principle: When the motor is started, the motor can drive the impeller 3 to rotate. The gas is drawn into the mounting cavity 4 from the air inlet 11 along the axial direction of the impeller 3. Driven by the impeller 3, part of the gas passes through the flow cavity 14 and is output from multiple second air outlets 13 along the radial direction of the impeller 3. The other part of the gas is output from multiple first air outlets 12 under the guidance of the flow cavity 14.

[0052] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are merely preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A fan with a protective structure, comprising an upper housing (1) and a lower housing (2) connected to each other, wherein a mounting cavity (4) is formed between the upper housing (1) and the lower housing (2), and a circuit board, a motor mounted on the circuit board, and an impeller (3) driven by the motor are disposed within the mounting cavity (4), characterized in that, An air inlet (11) is provided on the upper housing (1) to connect the mounting cavity (4) and the external environment along the axial direction of the impeller (3). The circumferential end of the upper housing (1) extends toward the lower housing (2) and its edge covers the lower housing (2). An air outlet channel is formed on the outer periphery of the impeller (3) to connect the mounting cavity (4) and the air inlet (11).

2. A fan with a protective structure according to claim 1, characterized in that, The air outlet channel includes: First air outlet (12); A connecting port, which is connected to the mounting cavity (4); The flow cavity (14) connects the first air outlet (12) and the connecting port.

3. A fan with a protective structure according to claim 2, characterized in that, The air outlet channel also includes a second air outlet (13), which is connected to the first air outlet (12) and the connecting port through the flow cavity (14).

4. A fan with a protective structure according to claim 2, characterized in that, A plurality of first air outlets (12) are formed between the circumferential end of the upper housing (1) and the circumferential end of the lower housing (1).

5. A fan with a protective structure according to claim 3, characterized in that, The upper housing (1) has a bend (15) at the position corresponding to the flow cavity (14), and the bend (15) has multiple through holes, which form the second air outlet (13).

6. A fan with a protective structure according to claim 5, characterized in that, Multiple through holes are opened radially along the impeller (3).

7. A fan with a protective structure according to claim 5, characterized in that, The bending part (15) has an arc-shaped surface structure on the side near the flow cavity (14).

8. A fan with a protective structure according to claim 5, characterized in that, Multiple through holes are arranged in a ring array on the bent part (15) with the rotation axis of the impeller (3) as the center.

9. A fan with a protective structure according to claim 1, characterized in that, The upper housing (1) is provided with an interface structure (16) at the air inlet (11), and the interface structure (16) is used to connect the air inlet pipe.

10. A fan with a protective structure according to claim 1, characterized in that, The lower housing (2) is provided with a power supply interface (5), and the pins in the power supply interface (5) are electrically connected to the circuit board.

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