Fan device for heat dissipation of automotive condenser

Abstract

Embodiments of the present application relate to a fan device for heat dissipation of an automotive condenser. The fan device comprises a frame, a fan motor mounted on the frame and a fan blade connected to an output shaft of the fan motor; the fan blade comprises a mounting portion and a plurality of blades connected to the mounting portion in a surrounding manner, and the mounting portion corresponds to the fan motor; and a plurality of heat dissipation through holes are provided on the mounting portion, and airflow flows through the exterior of the fan motor and flows from the heat dissipation through holes to the fan motor under the action of the fan motor, so as to perform heat dissipation on the fan motor. In the fan device provided in the embodiments of the present application, the plurality of heat dissipation through holes are provided on the mounting portion, and the airflow flows through the exterior of the fan motor and flows from the heat dissipation through holes to the fan motor under the action of the fan motor, improving the heat dissipation effect of the fan motor. In addition, the heat dissipation through holes can improve air fluidity, further improving the heat dissipation efficiency for the condenser.

Description

Fan device for cooling automobile condenser Technical Field

[0001] The present application relates to the technical field of condenser heat dissipation, and in particular to a fan device for heat dissipation of an automobile condenser. Background Art

[0002] The car condenser is a crucial component of the vehicle's air conditioning system, ensuring efficient cooling and dehumidification. Typically, the condenser is paired with a condenser fan, which is installed from the front to the rear of the vehicle. The condenser fan increases air flow and improves heat dissipation.

[0003] While the car is moving, the wind generated by the vehicle's forward motion helps dissipate heat from the condenser. However, when the car is driving at low speed or parked, the condenser fan plays a crucial role. By drawing air in from the front of the car and exhausting it, the condenser fan increases air flow and further improves the cooling effect.

[0004] A mounting portion is located in the middle of the condenser fan blades and is connected to the output shaft of the condenser fan motor. Conventionally, the mounting portion is radially larger than the motor housing, and is designed as a solid structure to ensure structural strength, significantly affecting the heat dissipation efficiency of the condenser fan motor.

[0005] Summary of the Invention

[0006] In view of this, an embodiment of the present application provides a fan device for heat dissipation of an automobile condenser in order to solve at least one problem existing in the background technology.

[0007] In a first aspect, an embodiment of the present application provides a fan device for heat dissipation of an automobile condenser, the fan device comprising a bracket, a fan motor mounted on the bracket, and fan blades connected to an output shaft of the fan motor.

[0008] The fan motor comprises a housing and a motor bracket, a gap is formed between the housing and the motor bracket, and an air inlet is formed on a side of the housing close to the fan blades;

[0009] The fan blade includes a mounting portion and a plurality of blades surrounding and connected to the mounting portion, the mounting portion corresponds to the fan motor, the mounting portion is provided with a plurality of heat dissipation holes, the orthographic projection of the housing in a first plane perpendicular to the rotation axis of the fan motor and the orthographic projection of the heat dissipation holes in the first plane at least partially overlap, and the orthographic projection of the housing in the first plane perpendicular to the rotation axis of the fan motor is located outside the orthographic projection of the blades in the first plane;

[0010] A first airflow flowing from the blades to the fan motor acts on the periphery of the housing;

[0011] A portion of the second airflow flowing from the heat dissipation through hole to the fan motor enters the interior of the fan motor through the air inlet, flows out at the gap and then merges into the first airflow, and another portion of the second airflow acts on the outer shell and the periphery of the outer shell and merges into the first airflow.

[0012] In combination with the first aspect of the present application, in an optional embodiment, a first through hole for connecting the output shaft is provided on the mounting portion, the axis of the mounting portion is colinearly arranged with the axis of the output shaft and rotates synchronously, and a plurality of the heat dissipation through holes are distributed on the mounting portion with the first through hole as the center.

[0013] In combination with the first aspect of the present application, in an optional embodiment, the plurality of heat dissipation holes are evenly distributed on the mounting portion in a ring array.

[0014] In combination with the first aspect of the present application, in an optional embodiment, the heat dissipation through hole includes an arc through hole, and the arc through hole corresponds to the side wall of the shell.

[0015] In combination with the first aspect of the present application, in an optional embodiment, along the radial direction of the fan blade, the first inner wall of the arc through hole is located on the outside of its second inner wall, the first inner wall and the second inner wall of the arc through hole correspond to the outer wall of the outer casing of the fan motor and the outer casing shell, and the second inner wall of the arc through hole is located on the outside of the inner wall of the outer casing of the fan motor.

[0016] In combination with the first aspect of the present application, in an optional embodiment, the heat dissipation through hole also includes an edge through hole, the two ends of the arc through hole are connected to the edge through hole, the edge through hole corresponds to the air inlet on the outer casing of the fan motor, and the air inlet includes at least a second through hole.

[0017] In combination with the first aspect of the present application, in an optional embodiment, a plurality of hollow areas are provided on the stator core mounting frame of the fan motor, and the hollow areas correspond to the second through holes along the axial direction of the fan motor.

[0018] In combination with the first aspect of the present application, in an optional embodiment, a partial area of ​​the inner wall of the heat dissipation through-hole extends toward its center line to form an air collecting block and a third through-hole. On the air inlet side of the heat dissipation through-hole, a step is formed between the surface of the air collecting block and the inner wall of the heat dissipation through-hole. The air flow can flow from the heat dissipation through-hole through the surface of the air collecting block and then through the third through-hole to the fan motor. The ratio of the flow area of ​​the third through-hole to the flow area of ​​the heat dissipation through-hole is 0.4-0.75.

[0019] In combination with the first aspect of the present application, in an optional embodiment, the air collecting block is extended to form the inner wall of at least one side of the heat dissipation hole.

[0020] In combination with the first aspect of the present application, in an optional embodiment, a partial area of ​​the inner wall on the other side of the heat dissipation through-hole, which is arranged opposite to the inner wall on the side where the air collecting block extends, extends toward the center line of the heat dissipation through-hole to form an air dispersion block. On the air outlet side of the heat dissipation through-hole, a step is formed between the surface of the air dispersion block and the inner wall of the heat dissipation through-hole, and the airflow flowing out from the third through-hole can flow to the fan motor through the surface of the air dispersion block.

[0021] In combination with the first aspect of the present application, in an optional embodiment, both ends of the arc through hole extend along a curve to form the edge through hole.

[0022] In combination with the first aspect of the present application, in an optional embodiment, a reinforcing rib is provided on the mounting portion, and the reinforcing rib includes a first closed reinforcing rib, the first closed reinforcing rib forms a closed loop structure, and the end of the edge through hole is connected to the first closed reinforcing rib.

[0023] In combination with the first aspect of the present application, in an optional embodiment, the reinforcement rib also includes a second closed reinforcement rib, and in the radial direction of the fan blade, the second closed reinforcement rib is located on the inner side of the first closed reinforcement rib, and the second closed reinforcement rib forms a closed loop structure.

[0024] In combination with the first aspect of the present application, in an optional embodiment, the first closed reinforcement rib and the second closed reinforcement rib are both located on the side of the mounting portion facing away from the fan motor, and partial structures of the first closed reinforcement rib and the second closed reinforcement rib are arranged adjacent to the free end of the edge through hole on the mounting portion.

[0025] In conjunction with the first aspect of the present application, in an optional embodiment, the heat dissipation through hole forms a fan blade structure on the mounting portion.

[0026] The reinforcing ribs further include third reinforcing ribs, and a plurality of the third reinforcing ribs are distributed on a side of the fan blade structure facing the fan motor.

[0027] In combination with the first aspect of the present application, in an optional embodiment, a chamfer is provided at the end surface edge of the shell facing the arc through hole, and the chamfer can guide part of the second airflow flowing through the arc through hole to the side wall of the shell.

[0028] In combination with the first aspect of the present application, in an optional embodiment, the fan motor further includes a rotor assembly and a stator assembly, the rotor assembly is sleeved on the outside of the stator assembly, and the stator assembly can drive the rotor assembly to rotate when energized.

[0029] In combination with the first aspect of the present application, in an optional embodiment, the stator assembly includes a stator core and a stator core mounting frame, and the core mounting frame is provided with at least one hollow area.

[0030] In combination with the first aspect of the present application, in an optional embodiment, the number of the hollow areas is three, and the three hollow areas are evenly distributed circumferentially around the rotation axis of the fan motor and extend along the direction of the rotation axis of the fan motor.

[0031] In combination with the first aspect of the present application, in an optional embodiment, the motor bracket is made of aluminum, and the second airflow acts on the end surface of the motor bracket facing the housing and turns to flow out through the gap.

[0032] An embodiment of the present application provides a fan device for dissipating heat from an automobile condenser. The fan device is provided with a plurality of heat dissipation holes on a mounting portion. Under the action of a fan motor, air flows through the outside of the fan motor and through the heat dissipation holes through the fan motor, thereby improving the heat dissipation effect of the fan motor. In addition, the heat dissipation holes can increase air fluidity, further improving the heat dissipation efficiency of the condenser.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0035] FIG1 is a schematic diagram of the airflow direction in the condenser and fan device in an embodiment of the present application;

[0036] FIG2 is an exploded view of the overall structure of a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0037] FIG3 is a schematic diagram of a fan blade structure in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0038] FIG4 is an enlarged view of point A in FIG3 ;

[0039] FIG5 is a schematic diagram showing the positional relationship between a portion of a fan motor housing and a portion of a heat dissipation through-hole in a fan device for heat dissipation of an automobile condenser provided by an embodiment of the present application;

[0040] FIG6 is a schematic diagram of a partial structure of a fan motor in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0041] FIG7 is a schematic structural diagram of a hollowed-out area of ​​a fan motor in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0042] FIG8 is a perspective schematic diagram of a fan blade installation portion of a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application, and an enlarged view of a portion of heat dissipation holes and an air collecting block;

[0043] FIG9 is a schematic structural diagram of a heat dissipation through hole, an air collecting block, and an air dissipating block in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0044] FIG10 is a partial structural diagram of a fan mounting portion of a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0045] FIG11 is a schematic structural diagram of another side of a fan in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0046] FIG12 is an exploded view of a fan motor and an enlarged view of an air vent in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0047] FIG13 is a schematic plan view of the structure of a fan motor in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0048] FIG14 is a cross-sectional view of the section AA in FIG13;

[0049] FIG15 is an enlarged view of point C in FIG14 ;

[0050] FIG16 is a schematic structural diagram of a central column of a fan motor in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application.

[0051] Reference numerals:

[0052] 10. Fan blade; 110. Blade; 120. Mounting portion; 121. Heat dissipation through hole; 1211. First inner wall; 1212. Second inner wall; 12a. Arc through hole; 12b. Edge through hole; 122. Wind collecting block; 123. Wind dispersing block; 124. Third through hole; 1251. First closed reinforcing rib; 1252. Second closed reinforcing rib; 1253. Third reinforcing rib; 126. First through hole;

[0053] 20. Fan motor; 2a. Hollow area; 210. Housing; 211. Second through hole; 212. Housing inner wall; 213. Housing outer wall; 214. Housing shell; 220. Output shaft; 230. Stator core mounting bracket; 240. Motor bracket; 250. Stator core; 260. Stator winding; 270. Magnet;

[0054] 30. Bracket; 310. Air vent; 311. Third through hole; 312. Fourth through hole; 34. Cavity; 40. Back cover; 510. Water absorber; 520. Column; 521. Fifth through hole; 60. Circuit board. DETAILED DESCRIPTION

[0055] The exemplary embodiments disclosed herein will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the specific embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0056] In the following description, numerous specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present application; that is, all features of actual embodiments are not described herein, nor are well-known functions and structures described in detail.

[0057] In the drawings, the sizes of layers, regions, elements and their relative sizes may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0058] It should be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" another element or layer, it may be directly on, adjacent to, connected to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer, or part discussed below may be represented as a second element, component, region, layer, or part. And when the second element, component, region, layer, or part is discussed, it does not necessarily mean that the first element, component, region, layer, or part is present in the present application.

[0059] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein for convenience of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that in addition to the orientations shown in the figures, the spatially relative terms are intended to include different orientations of the device in use and operation. For example, if the device in the drawings is flipped, then the elements or features described as "under the other elements" or "under it" or "under it" will be oriented as "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0060] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. When used herein, the singular forms "a", "an", and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0061] In order to fully understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0062] In the prior art, the radial dimension of mounting portion 120 is larger than the fan motor housing, and mounting portion 120 is designed as a solid structure to ensure structural strength. When the condenser fan is in operation, airflow flows approximately along the axial direction of the condenser fan motor, dissipating heat only from the exterior of the fan motor 20 and away from its housing. Essentially no cooling airflow flows into the interior of the fan motor 20, resulting in poor heat dissipation from the condenser fan motor 20.

[0063] Based on the above technical problems, an embodiment of the present application provides a fan device for dissipating heat from an automobile condenser. The heat dissipation device is provided with a plurality of heat dissipation holes 121 on the mounting portion 120 of the fan blade 10. When the condenser fan is in working condition, the wind flows through the plurality of heat dissipation holes 121 directly onto the outer casing 210 and flows through the inside of the fan motor 20, thereby greatly improving the heat dissipation effect of the fan motor 20.

[0064] A fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0065] Specifically, as shown in Figures 1 to 3, an embodiment of the present application provides a fan device for dissipating heat from an automobile condenser. The fan device includes a bracket 30, a fan motor 20 mounted on the bracket 30, and a fan blade 10 connected to an output shaft 220 of the fan motor 20. The fan blade 10 includes a mounting portion 120 and a plurality of blades 110 surrounding and connected to the mounting portion 120. The mounting portion 120 corresponds to the fan motor 20. The mounting portion 120 is provided with a plurality of heat dissipation holes 121. Under the action of the fan motor 20, air flows through the outside of the fan motor 20 and flows through the inside of the fan motor 20 from the heat dissipation holes 121 to dissipate heat from the fan motor 20. Specifically, the orthographic projection of the housing 210 in a first plane perpendicular to the axis of the fan motor 20 does not overlap with the orthographic projection of the blade 110 in the first plane, so that the first airflow flowing from the blade 110 to the fan motor 20 acts on the periphery of the housing 210.

[0066] The orthographic projection of the housing 210 in the first plane perpendicular to the axis of the fan motor 20 partially overlaps with the orthographic projection of the heat dissipation hole 121 in the first plane, so that a portion of the second airflow flowing from the heat dissipation hole 121 to the fan motor 20 enters the interior of the fan motor 20, flows out at the gap, and then merges into the first airflow, and another portion of the second airflow acts on the housing 210 and the periphery of the housing 210 and merges into the first airflow.

[0067] As shown in Figure 1, Figure 1 is a schematic diagram of the airflow direction in the condenser, the fan blades 10 of the fan device and the fan motor 20 in the embodiment of the present application. The fan blades 10 in the fan device provided in the embodiment of the present application play a flow-aiding role in the airflow flowing from the front of the vehicle through the condenser in the form of exhaust under the driving force of the fan motor 20. After the airflow flowing through the condenser passes through the blades 110 of the fan blades 10 and the multiple heat dissipation holes 121 on the mounting portion 120, it flows to the fan motor 20. The airflow can directly act on the fan motor 20 housing 210 and flow through the inside of the fan motor 20 from the heat dissipation holes 121, thereby improving the heat dissipation effect of the fan motor 20. In addition, the heat dissipation holes 121 and the fan motor 20 form an airflow channel to increase air fluidity, further improving the heat dissipation efficiency of the condenser.

[0068] In addition, as shown in Figure 1, the fan motor 20 includes a shell 210 and a motor bracket 240. There is a gap between the shell 210 and the motor bracket 240 of the fan motor 20. There is airflow around the outer shell 210 under the rotation of the fan blades 10. When the airflow inside the fan motor 20 is accelerated, it can better flow out from the gap between the shell 210 and the motor bracket 240 and merge with the airflow outside the shell 210. Not only will the phenomenon of airflow backflow not be formed, but the air fluidity can also be increased and the airflow rate can be accelerated.

[0069] It should be noted that the number of heat dissipation holes 121 provided on the mounting portion 120 is set according to the size of the fan blades and is not limited in this embodiment of the present application.

[0070] In one embodiment, as shown in Figure 3, a first through hole 126 for connecting the output shaft 220 is provided on the mounting portion 120. Preferably, the axis of the mounting portion 120 and the axis of the output shaft 220 are arranged collinearly, and the two rotate synchronously, and a plurality of heat dissipation through holes 121 are distributed on the mounting portion 120 with the first through hole 126 as the center.

[0071] That is, the output shaft 220 on the fan motor 20 is connected to the first through hole 126 of the mounting portion 120. The first through hole 126 is located at the center of the mounting portion 120, and the central axis of the first through hole 126 is collinear with the rotation axis of the fan motor 20, so that the fan blades 10 rotate under the drive of the fan motor 20. Because the airflow flows along the axis of the fan motor 20, it will act on the mounting portion 120 and the fan blades 10. The multiple heat dissipation holes 121 are distributed around the first through hole 126, improving the uniformity of the force applied to the mounting portion 120.

[0072] Preferably, multiple heat dissipation holes 121 are evenly distributed on the mounting portion 120 in a circular array with the first through hole 126 as the center. The even distribution of multiple heat dissipation holes 121 further improves the force uniformity of the mounting portion 120 and the entire fan blade 10, ensuring the working stability of the fan device.

[0073] In one embodiment, as shown in Figures 4 and 5 , the heat dissipation through-holes 121 include arc-shaped through-holes 12a, which correspond to the sidewalls of the housing of the fan motor 20. In other words, air flows through the arc-shaped through-holes 12a and directly onto the sidewalls of the housing of the fan motor 20, thereby directly dissipating heat from the sidewalls of the housing of the fan motor 20 and improving the heat dissipation effect of the fan motor 20.

[0074] Further, as shown in Figures 4 and 5, along the radial direction of the fan blade 10, the first inner wall 1211 of the arc through hole 12a is located on the outside of its second inner wall 1212, and the first inner wall 1211 and the second inner wall 1212 of the arc through hole 12a correspond to the outer shell wall 213 and the outer shell shell 214 of the fan motor 20, and the second inner wall 1212 of the arc through hole 12a is located on the outside of the inner shell wall 212 of the fan motor 20.

[0075] That is, after the airflow passes through the arc-shaped through-hole 12a, a portion of the airflow flows directly toward the outer housing wall 213 of the fan motor 20, while the other portion of the airflow directly acts on the housing shell 214 and flows toward the outer housing wall 213 under the obstruction of the housing shell 214. The airflow passing through the arc-shaped through-hole 12a directly dissipates heat from the outer housing wall 213 and the housing shell 214, thereby improving the heat dissipation effect.

[0076] It is understood that the edge shape of the orthographic projection of the housing 210 of the fan motor 20 on the mounting portion 120 corresponds to the shape of the arc-shaped through hole 12a. As an example, the housing 210 of the fan motor 20 is a cylindrical structure, and its orthographic projection on the mounting portion 120 is an arc, and the shape of the arc-shaped through hole 12a corresponds to the arc.

[0077] It can also be understood that the edge shape of the positive projection of the housing 210 of the fan motor 20 on the mounting portion 120 is a closed arc, and the arc through hole 12a is a plurality of independent arcs, which correspond to partial areas of the closed arc.

[0078] In an optional embodiment, a chamfer is provided at the edge of the end surface of the housing 210 facing the arc through hole 12a, and the chamfer can guide part of the second airflow flowing through the arc through hole 12a to the side wall of the housing.

[0079] After the airflow passes through the arc through hole 12a, a portion of the airflow directly acts on the chamfer on the housing 210. The chamfer can increase the contact area between the second airflow and the housing 210, further improving the guiding effect of the second airflow.

[0080] In one embodiment, as shown in Figure 4, the two ends of the arc through hole 12a extend to form edge through holes 12b, and the edge through holes 12b correspond to the air inlet on the housing 210 of the fan motor 20. The air inlet includes at least a second through hole 211, and the second through hole 211 is a heat dissipation hole on the fan motor 20.

[0081] That is to say, the edge through hole 12b is connected to the arc through hole 12a, and the edge through hole 12b corresponds to the second through hole 211. The airflow enters from the edge through hole 12b, flows through the second through hole 211 and enters the interior of the fan motor 20, increasing the fluidity of the airflow and thereby improving the heat dissipation effect of the fan motor 20.

[0082] Furthermore, the arc through hole 12a and the edge through hole 12b form a first angle, which is an acute angle, so that the edge through hole 12b can correspond to the inside of the fan motor 20. a The combination with the edge through holes 12b greatly increases the fluidity of the airflow, further improving the heat dissipation effect on the condenser.

[0083] The size of the first angle can be set according to the position of the second through hole 211 on the housing 210 of the fan motor 20, and is not limited in this embodiment of the present application.

[0084] In one embodiment, the fan motor 20 further includes a rotor assembly and a stator assembly. The rotor assembly is sleeved onto the outside of the stator assembly. During operation, the windings on the stator assembly are energized to generate a magnetic field that drives the rotor to rotate, thereby converting electrical energy into mechanical energy. In one embodiment, the stator assembly includes a stator core 250 and a stator core mounting frame 230. The core mounting frame 230 is provided with at least one hollow area 2a. The stator assembly further includes stator windings wound around the stator core 250. The rotor assembly includes magnets connected to the inner wall of the fan motor 20 housing.

[0085] The fan motor 20 provided in the embodiment of the present application is an external rotor motor, and the stator winding 260 is also an electromagnetic coil. Each stator winding 260 is passed through an alternating current. The magnet 270 is a permanent magnet, and an interaction force is generated between the magnet 270 and the stator winding 260. When an alternating current is passed through the stator winding 260, a rotating magnetic field is generated within the stator assembly. This magnetic field generates an interaction force with the magnet 270, causing the magnet 270 and the rotor housing 210 to rotate. Since the current on the stator assembly is alternating current, the magnetic field of the stator winding 260 will continuously change, thereby causing the interaction force on the rotor assembly to continuously change, thereby causing the rotor assembly to continue to rotate.

[0086] In one embodiment, as shown in Figures 6 and 7 , the stator core mounting bracket 230 of the fan motor 20 is provided with a plurality of hollow areas 2a. The hollow areas 2a and the stator core of the fan motor 20 correspond to the second through-holes 211. Specifically, there are three hollow areas 2a, which are evenly distributed circumferentially around the rotation axis of the fan motor 20 and extend along the rotation axis of the fan motor 20.

[0087] That is, the airflow passes through the edge through-hole 12b and then through the second through-hole 211 into the interior of the fan motor 20, primarily acting on the stator core and the hollow region 2a of the fan motor 20. The hollow region 2a is relatively large and extends axially, so the heat generated within the fan motor 20 flows toward the hollow region 2a. When the airflow passes through the hollow region 2a, there is no structural obstruction, allowing the heat to be effectively removed from the aforementioned gap, effectively improving the heat dissipation efficiency of the fan motor 20. It is worth noting that the airflow also passes through the stator core 250 of the fan motor 20, thereby also improving the heat dissipation efficiency of the fan motor 20.

[0088] It should be noted that the number of the second through holes 211 and the number and size of the hollow areas 2a can be set according to the size of the housing 210 of the fan motor 20 and other needs, and are not limited in the embodiment of the present application.

[0089] In one embodiment, as shown in Figure 8, a partial area of ​​the inner wall of the heat dissipation through hole 121 extends toward its center line to form an air collecting block 122 and a third through hole 124. On the air inlet side of the heat dissipation through hole 121, a step is formed between the surface of the air collecting block 122 and the inner wall of the heat dissipation through hole 121. The air flow can flow from the heat dissipation through hole 121 through the surface of the air collecting block 122 and then through the third through hole 124 to the fan motor 20.

[0090] Preferably, the ratio of the flow area of ​​the third through hole 124 to the flow area of ​​the heat dissipation through hole is 0.4-0.75. The purpose of the above arrangement is to accelerate the airflow through the third through hole 124, so that the flow rate of the second airflow entering the fan motor 20 at the gap is still greater than the flow rate of the first airflow outside, thereby preventing backflow and preventing hot air from being trapped inside the housing 210.

[0091] That is, when the airflow flows through the heat dissipation through-hole 121 , part of the airflow flows directly to the fan motor 20 through the third through-hole 124 , and the other part of the airflow flows to the third through-hole 124 after being blocked by the air collecting block 122 .

[0092] It is understandable that on the air inlet side, the air collecting block 122 forms a groove at the heat dissipation through-hole 121, and the air flow can flow into the groove, that is, the surface of the air collecting block 122, and then flow into the third through-hole 124 from the surface of the air collecting block 122. Due to the presence of the air collecting block 122, the air inlet side area of ​​the air flow is larger than the area of ​​the third through-hole 124, which can accelerate the air flow passing through the third through-hole 124, further improving the heat dissipation efficiency of the fan motor 20. It is also worth noting that after the air flow is accelerated by the air collecting block 122, it enters the interior of the fan motor 20, dissipates the heat inside the fan motor 20, and then flows out from the above-mentioned gap. At this time, the flow rate of the air flow flowing out of the gap is greater than the flow rate of the air flow acting on the outside of the fan motor 20 by the fan blades 10, so it can flow out smoothly without causing backflow. Similarly, the air flow at the arc through-hole 12a will also be accelerated, and the flow rate of the air flow acting on the outer shell of the fan motor 20 is also greater than the flow rate of the air flow acting on the outside of the fan motor 20 by the fan blades 10.

[0093] Furthermore, an air collecting block 122 is formed extending from the inner wall of one side of the heat dissipation through hole 121. As shown in Figure 8, the air collecting block 122 extends from the inner wall of one side of the heat dissipation through hole 121. When the diameter of the third through hole 124 is small, extending the air collecting block 122 from the inner wall of one side of the heat dissipation through hole 121 can meet the airflow velocity requirement.

[0094] However, when the diameter of the third through hole 124 is large, the air collecting block 122 extending from one inner wall of the heat dissipation through hole 121 cannot meet the airflow velocity. Alternatively, two air collecting blocks 122 are formed extending from two opposite inner walls of the heat dissipation through hole 121, with the third through hole 124 located between the two air collecting blocks 122.

[0095] It should be noted that the thickness of the air collecting block 122 is relatively thinner than that of the mounting portion 120. When the area of ​​the air collecting block 122 is large, the pressure caused by the rapidly passing airflow makes the air collecting block 122 unstable. Therefore, extending from the inside of both sides of the heat dissipation hole 121 at the same time can reduce the area of ​​a single air collecting block 122 and ensure the structural stability of the air collecting block 122.

[0096] In one embodiment, as shown in Figures 8 and 9 , a portion of the inner wall of the other side, opposite the inner wall of the heat dissipation hole 121 from which the air collecting block 122 extends, extends toward the centerline of the heat dissipation hole 121 to form an air dispersion block 123. On the outlet side of the heat dissipation hole 121, a step is formed between the surface of the air dispersion block 123 and the inner wall of the heat dissipation hole 121. Airflow exiting from the third through hole 124 can flow through the surface of the air dispersion block 123 toward the fan motor 20. The air dispersion block 123 reduces obstruction to the airflow after passing through the third through hole 124 by increasing its area, and also serves to converge the airflow toward the axis of the fan motor 20, thereby allowing the airflow to better enter the interior of the fan motor 20 through the second through hole 211.

[0097] In the embodiment of the present application, the direction of the arrow s in FIG9 indicates the direction of the airflow, that is, the airflow flows from the air inlet side of the fan blade 10 through the third through hole 124 to the fan motor 20. When the air inlet side area of ​​the heat dissipation through hole 121 is larger than the area of ​​the third through hole 124, the rate at which the airflow enters the third through hole 124 can be increased. At the same time, when the air outlet side area of ​​the heat dissipation through hole 121 is also larger than the area of ​​the third through hole 124, the efficiency of the airflow out of the third through hole 124 can be increased, further increasing the rate at which the airflow flows to the fan motor 20.

[0098] In one embodiment, as shown in FIG. 3 and FIG. 4 , both ends of the arc through hole 12 a extend along a curve to form a side through hole 12 b .

[0099] In this embodiment, as air flows through edge through-hole 12b, it exerts pressure on the periphery of edge through-hole 12b. The ends of arc-shaped through-hole 12a extend along a curve to form curved edge through-hole 12b. Curved edge through-hole 12b, or non-linear edge through-hole 12b, allows for multiple points of force to be applied during airflow, avoiding concentrated force. This ensures the structural stability of mounting portion 120 and further ensures the rotational stability of fan blade 10.

[0100] The specific shape of the edge through hole 12b is not limited in the embodiment of the present application and can be set according to specific needs.

[0101] In addition, the shape of the arc through hole 12a can be selected as the arc mentioned above, which can match the outer wall shape of the housing 210 of the fan motor 20 on the one hand, and avoid concentrated force when the airflow flows through the arc through hole 12a on the other hand.

[0102] In one embodiment, as shown in FIG10 and FIG11 , the mounting portion 120 is provided with reinforcing ribs, which include first closed reinforcing ribs 1251 . The first closed reinforcing ribs 1251 form a closed loop structure, and the ends of the edge through holes 12 b are connected to the first closed reinforcing ribs 1251 .

[0103] The first closed reinforcing rib 1251 can not only strengthen the support for the area formed by the heat dissipation through hole 121 and the mounting portion 120 , but also strengthen the support for the entire mounting portion 120 , thereby ensuring the structural strength of the mounting portion 120 .

[0104] In one embodiment, as shown in FIG10 , the reinforcing rib further includes a second closed reinforcing rib 1252 . In the radial direction of the fan blade 10 , the second closed reinforcing rib 1252 is located on the inner side of the first closed reinforcing rib 1251 , and the second closed reinforcing rib 1252 forms a closed-loop structure.

[0105] The combination of the second closed reinforcing rib 1252 and the first closed reinforcing rib 1251 ensures the structural strength of the entire fan blade 10, and further ensures the working stability of the fan device.

[0106] In one embodiment, the first closed reinforcing rib 1251 and the second closed reinforcing rib 1252 are both located on the side of the mounting portion 120 away from the fan motor 20, and part of the structure of the first closed reinforcing rib 1251 and the second closed reinforcing rib 1252 is arranged adjacent to the free end of the edge through hole 12b on the mounting portion 120.

[0107] In one embodiment, as shown in FIG11 , the heat dissipation through hole 121 forms a fan blade structure on the mounting portion 120 , and the reinforcing ribs further include third reinforcing ribs 1253 , and a plurality of third reinforcing ribs 1253 are distributed on the fan blade structure.

[0108] That is to say, the plurality of heat dissipation holes 121 form a plurality of fan blade structures on the mounting portion 120 , and a plurality of third reinforcing ribs 1253 are provided on the fan blade structures to ensure the strength of the fan blade structures.

[0109] Furthermore, a plurality of third reinforcing ribs 1253 are located on the inner side of the mounting portion 120, that is, on a side close to the fan motor 20. Providing the third reinforcing ribs 1253 on the inner side of the mounting portion 120 rather than on the outer side can avoid disrupting the airflow direction.

[0110] In one embodiment, the motor bracket 240 is made of aluminum. The second airflow acts on the end surface of the motor bracket 240 facing the housing 210 and turns to flow out through the gap, which can also dissipate heat for the motor bracket.

[0111] In the prior art, the temperature difference between the inside and outside of the fan motor will form condensed water vapor inside the fan motor. If the above condensed water vapor cannot be discharged in time, the condensed water vapor will condense into water droplets and may adhere to the circuit board, causing the chip to short-circuit and affecting the normal working performance of the fan motor.

[0112] The fan motor 20 provided in this embodiment of the present application utilizes ventilation holes 310 provided on the bracket 30 and a moisture absorbent member 510 installed within the ventilation holes 310, thereby transforming the cavity 34 from a closed structure to a breathable structure. The moisture absorbent member 510 promptly absorbs moisture within the cavity 34, ensuring dryness within the cavity 34 and, in turn, the operational stability of the circuit board 60. The breathable cavity 34 also allows the fan motor 20 to adjust the pressure balance between the interior and exterior of the cavity 34 during operation.

[0113] Specifically, as shown in FIG. 12 to FIG. 14 , the fan motor 20 provided in the embodiment of the present application includes a circuit board 60 , a bracket 30 , a rotor-stator assembly, a rear cover 40 and a ventilation assembly.

[0114] The bracket 30 is connected to the circuit board 60 , and a vent hole 310 is provided on the bracket 30 .

[0115] The stator-rotor assembly includes a stator assembly and a rotor assembly. The rotor assembly surrounds the periphery of the stator assembly. The stator assembly is connected to the bracket 30 . The stator-rotor assembly is electrically connected to the circuit board 60 .

[0116] The back cover 40 is sealedly connected to the bracket 30 . The bracket 30 is located between the back cover 40 and the rotor-stator assembly. A cavity 34 is formed between the back cover 40 and the bracket 30 . The circuit board 60 is located in the cavity 34 .

[0117] The ventilation component includes a water absorbent 510 , which is located in the ventilation hole 310 . The ventilation hole 310 is connected to the cavity 34 . Condensed water vapor formed in the cavity 34 is absorbed by the water absorbent 510 when flowing through the ventilation hole 310 .

[0118] In the embodiment of the present application, a vent hole 310 is provided on the bracket 30. This vent hole 310 communicates with the cavity 34, transforming the sealed cavity 34 into a breathable one. This breathable cavity 34 can balance the internal and external pressure differences generated during fan motor operation. Furthermore, due to the temperature difference between the inside and outside, suspended water vapor forms within the cavity 34. With the original sealed structure, this water vapor cannot be discharged, and could adhere to the circuit board, posing a short circuit risk. The inventive breathable structure of the present application utilizes the fluidity of the airflow to remove the water vapor. Furthermore, the water-absorbing element, while being breathable, effectively absorbs the water vapor, maintaining the dryness of the airflow, effectively addressing the drawbacks of the prior art.

[0119] In addition, when the moisture outside the cavity 34 is high, the water absorbent 510 can also prevent the moisture outside the cavity 34 from entering the cavity 34 and can effectively block dust.

[0120] The fan motor further includes a wiring harness assembly (not shown), one end of which is located in the cavity 34 and connected to the circuit board 60 .

[0121] In an optional embodiment, as shown in Figures 13 to 15, the air vent 310 includes a third through hole 311 and a fourth through hole 312 that are connected to each other, one end of the third through hole 311 is connected to the fourth through hole 312, and the other end is connected to the cavity 34, and the diameter of the third through hole 311 is larger than the diameter of the fourth through hole 312.

[0122] In other words, the air vent 310 is formed with a third through hole 311 and a fourth through hole 312 of different diameters. The distal end of the third through hole 311 connects to the interior of the cavity 34, while the distal end of the fourth through hole 312 connects to the exterior of the cavity 34. The larger diameter of the third through hole 311 than the fourth through hole 312 accelerates the flow of air from the cavity 34 from the third through hole 311 to the fourth through hole 312, allowing moisture within the cavity 34 to be more easily removed and fully absorbed by the water absorbent element 510.

[0123] In addition, the diameter of the fourth through hole 312 is smaller than the diameter of the third through hole 311. Such a "large inside and small outside" structure can ensure internal and external airflow when the fan motor is in a non-working state such as transportation, and the small external diameter design can reduce the flow efficiency, further allowing the water absorbent member 510 to fully absorb the water vapor flowing through it.

[0124] In an optional embodiment, the ratio of the diameter of the fourth through hole 312 to the diameter of the third through hole 311 is in a range of 0.37 to 0.43.

[0125] When the ratio of the diameter of the fourth through hole 312 to the diameter of the third through hole 311 is greater than 0.43, the ability of the water absorber 510 to block moisture outside the cavity 34 becomes weak, and moisture outside the cavity 34 may enter the cavity 34 .

[0126] When the ratio of the diameter of the fourth through hole 312 to the diameter of the third through hole 311 is less than 0.37, although the fourth through hole 312 with an excessively small diameter can effectively block the moisture outside the cavity 34, it greatly reduces the flow efficiency of the airflow inside and outside the cavity 34 and does not utilize the discharge of water vapor inside the cavity 34.

[0127] The ratio of the diameter of the fourth through hole 312 to the diameter of the third through hole 311 is in the range of 0.37 to 0.43, which can ensure the efficiency of airflow inside and outside the cavity 34 while also effectively blocking moisture outside the cavity 34. As an example, the diameter of the third through hole is 10 mm, and the diameter of the fourth through hole is 4 mm.

[0128] In an alternative embodiment, the water absorbing member 510 is located within the third through hole 311. The diameter of the third through hole 311 is larger than the diameter of the fourth through hole 312. Placing the water absorbing member 510 within the third through hole 311 can increase the contact area between the water absorbing member 510 and the interior of the cavity 34, thereby improving the water absorption effect of the water absorbing member 510.

[0129] In an optional embodiment, the breathable component further includes a locking member, which abuts against the inner wall of the third through hole 311 , and the water absorbing member 510 is located between the locking member and the bottom wall of the third through hole 311 .

[0130] In the embodiment of the present application, a locking member is used to abut against the inner wall of the third through hole 311 to prevent the water absorbing member 510 from detaching from the third through hole 311, thereby ensuring the stability of the breathable component, thereby effectively ensuring the water absorption effect and further ensuring a dry environment inside the cavity 34.

[0131] In an optional embodiment, as shown in Figures 14 and 15, the water absorbing member 510 is located on the bottom wall of the third through hole 311, the locking member covers the surface of the water absorbing member 510, and the shape of the water absorbing member 510 matches the shape of the bottom wall of the third through hole 311.

[0132] In other words, the locking member not only abuts the inner wall of the third through hole 311 but also covers the surface of the water absorbent member 510, thereby limiting the position of the water absorbent member 510 within the third through hole 311 and preventing it from moving during fan motor operation, which could affect the water absorption effect. Furthermore, the shape of the water absorbent member 510 matches the shape of the bottom wall of the third through hole 311. Specifically, the water absorbent member 510 is cylindrical, and its outer diameter equals the inner diameter of the third through hole 311. This means that the water absorbent member 510 is positioned within the third through hole 311 with its maximum area.

[0133] In an alternative embodiment, the edge of the water-absorbing member 50 extends toward the cavity to form a flange (not shown in the figure), and the flange is located on the inner wall of the third through hole 311. The flange is located between the locking member and the bottom wall of the third through hole 311. This can increase the contact area between the water-absorbing member and the cavity and improve the water absorption effect.

[0134] The thickness of the water absorbing member 510 can be set according to specific circumstances, such as according to factors such as the size of the fan motor, and is not limited in the embodiment of the present application.

[0135] The water absorbing member 510 is preferably wool felt, in which the wool has a tubular structure that can absorb moisture in the humid air. Of course, the material of the water absorbing member 510 is not limited to wool felt, and can also be other materials.

[0136] In an optional embodiment, as shown in Figure 16, the locking member is a column 520, the outer diameter of the column 520 is larger than the inner wall diameter of the third through hole 311, the column 520 and the third through hole 311 are interference fit, and a fifth through hole 521 is provided on the column 520, and the fifth through hole 521 corresponds to the fourth through hole 312.

[0137] That is, the column 520 and the third through hole 311 are in interference fit, so that the column 520 can be firmly connected to the third through hole 311. The fifth through hole 521 corresponds to the fourth through hole 312, so that the fifth through hole 521 and the fourth through hole 312 can form an air flow channel.

[0138] In an optional embodiment, as shown in FIG. 15 , the diameter of the fifth through hole 521 is greater than or equal to the diameter of the fourth through hole 312 .

[0139] In the embodiment of the present application, the diameter of the fifth through hole 521 is greater than or equal to the diameter of the fourth through hole 312. On the one hand, it can prevent the column 520 from affecting the air flow; on the other hand, the larger the diameter of the fifth through hole 521, the larger the contact area between the water absorbent member 510 and the cavity 34, thereby improving the water absorption effect of the water absorbent member 510.

[0140] In an alternative embodiment, the locking member is a clip (not shown) that is clipped onto the inner wall of the third through hole. Compared to the column 520, the clip occupies less space, thereby increasing the contact area between the water absorbing member 510 and the interior of the cavity 34, thereby improving the water absorption efficiency of the water absorbing member 510.

[0141] In an optional embodiment, as shown in FIG14 , there is a gap between the end of the housing 210 of the rotor assembly and the bracket 30 , and the position of the corresponding air vent 310 on the rotor assembly is close to the outer wall of the housing 210 , and the air vent 310 is connected to the gap.

[0142] As shown in FIG14 , the opening of the air vent 310 faces the stator assembly and is radially located inside the housing 210 and close to the outer wall of the housing 210. A fan is connected to the end of the fan motor away from the bracket 30. The direction of the airflow generated by the fan rotation is as indicated by the arrow in FIG14 , that is, along the stator axis. When the airflow inside the rotor assembly housing 210 flows to the bracket 30, it flows toward the gap. During this process, the cooling airflow can enter the cavity 34 through the air vent 31, forming a circulating airflow within the cavity 34 to remove the moisture in the cavity 34. It is also worth noting that when the airflow from the outer periphery of the housing 210 flows to the gap, it can guide the airflow out of the air vent 310, making the airflow out of the cavity 34 directional, accelerating the outflow of the airflow from the cavity 34, and preventing backflow into the cavity 34 and the interior of the housing 210. This also prevents the stator and rotor assemblies from being affected by excessive moisture outside the cavity 34. It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the claims. Various modifications and variations may be made to the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present application that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of the present application and do not limit the scope of protection of the patent application.

Claims

1. A fan device for heat dissipation of an automotive condenser. The fan device includes a bracket (30), a fan motor (20) mounted on the bracket (30), and a fan blade (10) connected to an output shaft (220) of the fan motor (20), characterized in that the fan motor (20) includes a housing (210) and a motor bracket (240). There is a gap between the housing (210) and the motor bracket (240). An air inlet is formed on a side of the housing (210) close to the fan blade (10); the fan blade (10) includes a mounting portion (120) and a plurality of blades (110) circumferentially connected to the mounting portion (120). The mounting portion (120) corresponds to the fan motor (20). A plurality of heat dissipation through holes (121) are provided on the mounting portion (120). A positive projection of the housing (210) in a first plane perpendicular to the rotation axis of the fan motor (20) at least partially overlaps with a positive projection of the heat dissipation through holes (121) in the first plane. The positive projection of the housing (210) in the first plane perpendicular to the rotation axis of the fan motor (20) is located outside the positive projection of the blades (110) in the first plane; a first air flow flowing from the blades (110) to the fan motor (20) acts on the periphery of the housing (210); a second air flow flowing from the heat dissipation through holes (121) to the fan motor (20) partly enters the interior of the fan motor (20) through the air inlet, flows out at the gap and then merges into the first air flow. Another part of the second air flow acts on the housing (210) and the periphery of the housing (210) and merges into the first air flow.

2. The fan device for heat dissipation of an automotive condenser according to claim 1, wherein a first through hole (126) for connecting the output shaft (220) is provided on the mounting portion (120). The axis of the mounting portion (120) is collinear with the axis of the output shaft (220) and rotates synchronously. The plurality of heat dissipation through holes (121) are distributed on the mounting portion (120) centered on the first through hole (126). Preferably, the plurality of heat dissipation through holes (121) are uniformly distributed in an annular array on the mounting portion (120).

3. The fan device for heat dissipation of an automotive condenser according to claim 2, characterized in that, the heat dissipation through hole (121) includes an arc-shaped through hole (12a), and the arc-shaped through hole (12a) corresponds to a side wall of the housing (210). Preferably, along the radial direction of the fan blade (10), a first inner wall (1211) of the arc-shaped through hole (12a) is located outside a second inner wall (1212) thereof. Between the first inner wall (1211) and the second inner wall (1212) of the arc-shaped through hole (12a), it corresponds to an outer side wall (213) and a housing shell (214) of the housing of the fan motor (20). The second inner wall (1212) of the arc-shaped through hole (12a) is located outside an inner side wall (212) of the housing of the fan motor (20).

4. The fan device for dissipating heat from an automotive condenser according to claim 3, characterized in that, The heat dissipation through hole (121) further comprises an edge through hole (12b), the two ends of the arc through hole (12a) are connected to the edge through hole (12b), the edge through hole (12b) corresponds to the air inlet on the housing (210) of the fan motor (20), and the air inlet comprises at least a second through hole (211). Preferably, a plurality of hollow areas (2a) are provided on the stator core mounting frame (230) of the fan motor (20), and the hollow areas (2a) correspond to the second through holes (211) along the axial direction of the fan motor (20).

5. The fan device for dissipating heat of an automotive condenser according to claim 1, characterized in that, A partial area of ​​the inner wall of the heat dissipation through hole (121) extends in the direction of the center line thereof to form an air collecting block (122) and a third through hole (124); on the air inlet side of the heat dissipation through hole (121), a step is formed between the surface of the air collecting block (122) and the inner wall of the heat dissipation through hole (121); air flow can flow from the heat dissipation through hole (121) through the surface of the air collecting block (122) and then through the third through hole (124) to the fan motor (20); the ratio of the flow area of ​​the third through hole (124) to the flow area of ​​the heat dissipation through hole (121) is 0.4-0.

75. Preferably, the air collecting block (122) is extended from at least one inner wall of the heat dissipation through hole (121). Preferably, a partial area of ​​the inner wall on the other side of the heat dissipation through hole (121) which is arranged opposite to the inner wall on the side on which the air collecting block (122) is extended extends in the direction of the center line of the heat dissipation through hole (121) to form an air dispersion block (123); on the air outlet side of the heat dissipation through hole (121), a step is formed between the surface of the air dispersion block (123) and the inner wall of the heat dissipation through hole (121); and the airflow flowing out of the third through hole (124) can flow to the fan motor (20) through the surface of the air dispersion block (123).

6. The fan device for dissipating heat from an automotive condenser according to claim 4, characterized in that, The two ends of the arc through hole (12a) extend along a curve to form the edge through hole (12b).

7. The fan device for heat dissipation of an automotive condenser according to claim 4, characterized in that The mounting portion (120) is provided with reinforcing ribs, the reinforcing ribs comprising first closed reinforcing ribs (1251), the first closed reinforcing ribs (1251) forming a closed loop structure, and the ends of the edge through holes (12b) are connected to the first closed reinforcing ribs (1251). Preferably, the reinforcing rib also includes a second closed reinforcing rib (1252), and in the radial direction of the fan blade (10), the second closed reinforcing rib (1252) is located on the inner side of the first closed reinforcing rib (1251), and the second closed reinforcing rib (1252) forms a closed-loop structure. Preferably, the first closed reinforcing rib (1251) and the second closed reinforcing rib (1252) are both located on the side of the mounting portion (120) facing away from the fan motor (20), and partial structures of the first closed reinforcing rib (1251) and the second closed reinforcing rib (1252) are arranged adjacent to the free end of the edge through hole (12b) on the mounting portion (120). Preferably, the heat dissipation through hole (121) forms a fan blade structure on the mounting portion (120); The reinforcing rib further includes a third reinforcing rib (1253), and a plurality of the third reinforcing ribs (1253) are distributed on a side of the fan blade structure facing the fan motor (20).

8. The fan device for heat dissipation of an automotive condenser according to claim 3, characterized in that, A chamfer is provided at an end face edge of the housing (210) facing the arc-shaped through hole (12a), and the chamfer can deflect a part of the second air flow flowing through the arc-shaped through hole (12a) to the side wall of the housing (210).

9. The fan device for dissipating heat from an automotive condenser according to claim 1, wherein The fan motor (20) further includes a rotor assembly and a stator assembly. The rotor assembly is sleeved outside the stator assembly, and the stator assembly can drive the rotor assembly to rotate when powered on. Preferably, the stator assembly includes a stator core and a stator core mounting bracket (230), and at least one hollowed-out area (2a) is provided on the core mounting bracket (230). Preferably, the number of the hollowed-out areas (2a) is three, and the three hollowed-out areas (2a) are circumferentially and uniformly distributed around the rotation axis of the fan motor (20) and extend along the rotation axis direction of the fan motor (20).

10. The fan device for heat dissipation of an automotive condenser according to claim 1, wherein, The motor bracket (240) is made of aluminum material, and the second air flow acts on the end face of the motor bracket (240) facing the housing (210) and turns to flow out through the gap.

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