Fan device for heat dissipation of automobile condenser

Abstract

The fan device comprises a support, a fan motor installed on the support and a fan blade connected to an output shaft of the fan motor, the fan blade comprises an installation part and a plurality of blades connected with the installation part in a surrounding mode, and the installation part corresponds to the fan motor. A plurality of heat dissipation through holes are formed in the mounting part, and airflow flows through the outside of the fan motor under the action of the fan motor and flows to the fan motor from the heat dissipation through holes so as to dissipate heat of the fan motor. According to the fan device provided by the embodiment of the invention, the multiple heat dissipation through holes are formed in the mounting part, airflow flows through the exterior of the fan motor under the action of the fan motor and flows through the fan motor from the heat dissipation through holes, the heat dissipation effect of the fan motor is improved, in addition, the heat dissipation through holes can improve the air fluidity, and the heat dissipation efficiency of the condenser is further improved.

Description

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 an important part of the car air conditioning system. The car condenser is used to achieve efficient cooling and dehumidification. Usually, the car condenser is equipped with a condenser fan. The condenser and condenser fan are installed from the front to the rear of the car. The condenser fan is used to increase air flow and improve the heat dissipation effect.

[0003] When the car is driving, the wind generated by the vehicle's forward movement can help the condenser dissipate heat, but when driving at low speed or parking, the condenser fan will play a vital role. The condenser fan increases air flow by sucking air from the front of the car and exhausting it, further improving the cooling effect.

[0004] A mounting portion is provided in the middle of the blade of the condenser fan, and the mounting portion is connected to the output shaft of the motor of the condenser fan. Conventionally, the radial size of the mounting portion is larger than the motor housing, and the mounting portion is designed as a solid structure to ensure structural strength, which greatly affects the heat dissipation effect of the motor of the condenser fan. Utility Model Content

[0005] 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.

[0006] 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 a fan blade connected to an output shaft of the fan motor.

[0007] 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;

[0008] The fan blade comprises a mounting portion and a plurality of blades surrounding and connected to the mounting portion, the mounting portion corresponds to the fan motor, and the mounting portion is provided with a plurality of heat dissipation through holes;

[0009] A first airflow from the blades to the fan motor acts on the periphery of the housing;

[0010] A portion of the second airflow flowing from the heat dissipation 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.

[0011] In combination with the first aspect of the present application, in an optional embodiment, the mounting portion is provided with a first through hole for connecting the output shaft, the axis of the mounting portion is colinearly arranged with the axis of the output shaft and rotates synchronously, and the plurality of heat dissipation through holes are distributed on the mounting portion with the first through hole as the center.

[0012] In combination with the first aspect of the present application, in an optional embodiment, the plurality of heat dissipation through holes are evenly distributed on the mounting portion in a ring array.

[0013] 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.

[0014] 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.

[0015] 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 casing of the fan motor, and the air inlet includes at least a second through hole.

[0016] 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.

[0017] 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 airflow 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.

[0018] In combination with the first aspect of the present application, in an optional embodiment, the air collecting block is extended to form an inner wall of at least one side of the heat dissipation hole.

[0019] 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, and 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.

[0020] In combination with the first aspect of the present application, in an optional embodiment, two ends of the arc through hole extend along a curve to form the edge through hole.

[0021] In combination with the first aspect of the present application, in an optional embodiment, the mounting portion is provided with reinforcing ribs, the reinforcing ribs include first closed reinforcing ribs, the first closed reinforcing ribs form a closed loop structure, and the ends of the edge through holes are connected to the first closed reinforcing ribs.

[0022] 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.

[0023] 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.

[0024] In combination 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.

[0025] The reinforcing ribs also 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.

[0026] 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.

[0027] 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 powered on.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] A fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application is provided with a plurality of heat dissipation holes on a mounting portion. Air flow flows through the outside of the fan motor and through the heat dissipation holes through the fan motor under the action of the fan motor, thereby improving the heat dissipation effect of the fan motor. In addition, the heat dissipation holes can increase air fluidity, thereby further improving the heat dissipation efficiency of the condenser.

[0032] 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 the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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:

[0034] Figure 1 A schematic diagram of the airflow direction in the condenser and the fan device in the embodiment of the present application;

[0035] Figure 2 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;

[0036] Figure 3 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;

[0037] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0038] Figure 5 A schematic diagram of the positional relationship between a portion of the fan motor housing and a portion of the heat dissipation through-holes in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0039] Figure 6 A schematic diagram of a portion 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;

[0040] Figure 7 A schematic diagram of the structure of a hollow area of ​​a fan motor in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0041] Figure 8 A three-dimensional schematic diagram of the installation portion of a fan blade in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application and an enlarged view of some heat dissipation holes and an air collecting block;

[0042] Fig. 9 A schematic diagram of the structure of a heat dissipation through hole, a wind collecting block and a wind dissipating block in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0043] Fig.10 A partial structural schematic diagram of a fan installation portion in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0044] Fig.11 A schematic diagram of the structure 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;

[0045] Fig.12 An exploded view of a fan motor in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application and an enlarged view of the air vent;

[0046] Fig.13 A schematic diagram of the planar structure of a fan motor in a fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application;

[0047] Fig.14 for Fig.13 Sectional view at AA in the middle;

[0048] Fig.15 for Fig.14 Enlarged view of point C in the middle;

[0049] Fig.16 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.

[0050] Reference numerals:

[0051] 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 dissipating block; 124, third through hole; 1251, first closed reinforcing rib; 1252, second closed reinforcing rib; 1253, third reinforcing rib; 126, first through hole;

[0052] 20, fan motor; 2a, hollow area; 210, housing; 211, second through hole; 212, inner wall of housing; 213, outer wall of housing; 214, housing shell; 220, output shaft; 230, stator core mounting frame; 240, motor bracket; 250, stator core; 260, stator winding; 270, magnetic steel;

[0053] 30. Bracket; 310. Air vent; 311. Third through hole; 312. Fourth through hole; 34. Cavity; 40. Back cover; 510. Water absorbent; 520. Column; 521. Fifth through hole; 60. Circuit board. DETAILED DESCRIPTION

[0054] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the 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. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope disclosed in the present application to those skilled in the art.

[0055] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features known in the art are not described; that is, all features of the actual embodiments are not described here, and well-known functions and structures are not described in detail.

[0056] 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.

[0057] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there is no intervening element or layer. It should be understood that although the terms first, second, third, etc. can 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 only 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 can be represented as the second element, component, region, layer or part. And when the second element, component, region, layer or part is discussed, it does not indicate that the present application necessarily has the first element, component, region, layer or part.

[0058] Spatially relative terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used here for convenience of description to describe the relationship between an element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, the spatial relationship terms are intended to also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is turned over, then the elements or features described as "under other elements" or "under it" or "under it" will be oriented as "on" other elements or features. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0059] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", 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.

[0060] In order to thoroughly 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, but in addition to these detailed descriptions, the present application may also have other implementation methods.

[0061] In the prior art, the radial size of the mounting portion 120 is larger than the size of the fan motor housing, and the mounting portion 120 is designed as a solid structure to ensure structural strength. When the condenser fan is in operation, the wind flows approximately along the axial direction of the condenser fan motor, and the heat can only be dissipated from the outside of the fan motor 20 to its housing, and there is basically no heat dissipation airflow flowing into the inside, resulting in poor heat dissipation effect of the condenser fan motor 20.

[0062] Based on the above technical problems, an embodiment of the present application provides a fan device for cooling a car 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 state, 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.

[0063] A fan device for heat dissipation of an automobile condenser provided in an embodiment of the present application is described in detail below in conjunction with the accompanying drawings.

[0064] Specifically, Figures 1 to 3 As shown, the embodiment of the present application provides a fan device for heat dissipation of 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 connecting the mounting portion 120, the mounting portion 120 corresponds to the fan motor 20, and a plurality of heat dissipation holes 121 are provided on the mounting portion 120, and the airflow 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 under the action of the fan motor 20, so as to dissipate the heat of the fan motor 20. Specifically, the orthographic projection of the housing 210 in the 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.

[0065] The orthographic projection of the outer shell 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 part 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 part of the second airflow acts on the outer shell 210 and the periphery of the outer shell 210 and merges into the first airflow.

[0066] like Figure 1 As shown, Figure 1 The 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 role in assisting the airflow flowing through the condenser from the front of the vehicle 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, the airflow flows to the fan motor 20. The airflow can directly act on the housing 210 of the fan motor 20 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 airflow channel formed by the heat dissipation holes 121 and the fan motor 20 increases the air flow, further improving the heat dissipation efficiency of the condenser.

[0067] In addition, if Figure 1 As shown, 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 shell 210 when the fan blades 10 rotate. When the airflow inside the fan motor 20 is accelerated, it can flow out better from the gap between the shell 210 and the motor bracket 240 and merge with the airflow around 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.

[0068] 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 blade and is not limited in the embodiment of the present application.

[0069] In one embodiment, if Figure 3 As shown, the mounting portion 120 is provided with a first through hole 126 for connecting the output shaft 220. Preferably, the axis of the mounting portion 120 is colinear with the axis of the output shaft 220, and the two rotate synchronously. A plurality of heat dissipation through holes 121 are distributed on the mounting portion 120 with the first through hole 126 as the center.

[0070] 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 colinearly arranged with the rotation axis of the fan motor 20, so that the fan blade 10 rotates under the drive of the fan motor 20. Since the airflow flows along the axial direction of the fan motor 20, it will act on the mounting portion 120 and the fan blade 10, and the multiple heat dissipation through holes 121 are distributed with the first through hole 126 as the center, so as to improve the force uniformity of the mounting portion 120.

[0071] 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.

[0072] In one embodiment, if Figure 4 and Figure 5 As shown, the heat dissipation through hole 121 includes an arc through hole 12a, and the arc through hole 12a corresponds to the side wall of the shell of the fan motor 20. In other words, the airflow flows through the arc through hole 12a and directly flows to the side wall of the shell of the fan motor 20, so as to directly dissipate the heat of the side wall of the shell of the fan motor 20, thereby improving the heat dissipation effect of the fan motor 20.

[0073] Furthermore, if Figure 4 and Figure 5 As shown, 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.

[0074] That is, after the airflow passes through the arc through hole 12a, a part of the airflow directly flows to the outer shell wall 213 of the fan motor 20, and the other part of the airflow directly acts on the outer shell shell 214 and flows to the outer shell wall 213 under the blocking effect of the outer shell shell 214. The airflow passing through the arc through hole 12a directly dissipates heat from the outer shell wall 213 and the outer shell shell 214, thereby improving the heat dissipation effect.

[0075] It is understandable 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 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 through hole 12a corresponds to an arc.

[0076] 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, and the plurality of independent arcs correspond to partial areas of the closed arc.

[0077] 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.

[0078] After the airflow flows 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 on the second airflow.

[0079] In one embodiment, if Figure 4 As shown, the two ends of the arc through hole 12a extend to form edge through holes 12b, which 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, which is a heat dissipation hole on the fan motor 20.

[0080] 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 fan motor 20, increasing the fluidity of the airflow and thereby improving the heat dissipation effect of the fan motor 20.

[0081] 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. The combination of the arc through hole 12a and the edge through hole 12b greatly increases the fluidity of the airflow, further improving the heat dissipation effect on the condenser.

[0082] 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 the embodiment of the present application.

[0083] In one embodiment, the fan motor 20 further includes a rotor assembly and a stator assembly, wherein the rotor assembly is sleeved on the outside of the stator assembly. During operation, the winding on the stator assembly is energized to form a magnetic field to drive 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, and the core mounting frame 230 is provided with at least one hollow area 2a. The stator assembly further includes a stator winding, which is wound on the stator core 250. The rotor assembly includes a magnet, which is connected to the inner wall of the fan motor 20 housing.

[0084] The fan motor 20 provided in the embodiment of the present application is an outer rotor motor, and the stator winding 260 is also an electromagnetic coil. An alternating current is passed through each stator winding 260, and 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 in the stator assembly, and this magnetic field generates an interaction force with the magnet 270, so that the magnet 270 and the rotor housing 210 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, so that the rotor assembly continues to rotate.

[0085] In one embodiment, if Figure 6 and Figure 7 As shown, 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 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 around the rotation axis of the fan motor 20 and extend along the rotation axis direction of the fan motor 20.

[0086] That is to say, the airflow passes through the edge through hole 12b and then enters the interior of the fan motor 20 through the second through hole 211, and mainly acts on the stator core and the hollow area 2a of the fan motor 20, wherein the hollow area 2a has a large area and extends axially, and the heat generated inside the fan motor 20 will flow toward the hollow area 2a. When the airflow passes through the hollow area 2a, there is no structural obstruction, and the heat can be better taken out from the above-mentioned 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, which can also improve the heat dissipation efficiency of the fan motor 20.

[0087] 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 the embodiment of the present application is not limited thereto.

[0088] In one embodiment, if Figure 8 As shown, 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.

[0089] 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 above arrangement is intended to accelerate the airflow passing through the third through hole 124, so that the flow velocity of the second airflow entering the fan motor 20 at the gap is still greater than the first airflow at the periphery, thereby preventing backflow and avoiding trapping the hot air inside the housing 210.

[0090] That is to say, 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 .

[0091] 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 airflow can flow into the groove, that is, the surface of the air collecting block 122, and then the airflow flows into the third through hole 124 from the surface of the air collecting block 122. Due to the existence of the air collecting block 122, the air inlet side area of ​​the airflow is larger than the area of ​​the third through hole 124, and the airflow flowing through the third through hole 124 can be accelerated, further improving the heat dissipation efficiency of the fan motor 20. It is also worth noting that the airflow enters the interior of the fan motor 20 after being accelerated by the air collecting block 122, and flows out from the above-mentioned gap after dissipating the heat inside the fan motor 20. At this time, the airflow velocity flowing out of the gap is greater than the airflow velocity of the fan blade 10 acting on the outside of the fan motor 20, so it can flow out smoothly without causing backflow. Similarly, the airflow at the arc through hole 12a will also be accelerated, and the airflow velocity of the airflow acting on the outer shell of the fan motor 20 is also greater than the airflow velocity of the fan blade 10 acting on the outside of the fan motor 20.

[0092] Furthermore, an air collecting block 122 is formed by extending from the inner wall of one side of the heat dissipation through hole 121. Figure 8 As shown, the air collecting block 122 is formed by extending 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 on the inner wall of one side of the heat dissipation through hole 121 can meet the air flow rate requirement.

[0093] When the diameter of the third through hole 124 is large, the air collecting block 122 extending from the inner wall of one side of the heat dissipation through hole 121 cannot meet the air flow rate. Alternatively, two air collecting blocks 122 are simultaneously extended from the inner walls of the two opposite sides of the heat dissipation through hole 121, and the third through hole 124 is located between the two air collecting blocks 122.

[0094] 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 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.

[0095] In one embodiment, if Figure 8 and Fig. 9 As shown, a part of the inner wall on the other side opposite to the inner wall on the side where the wind collecting block 122 extends from the heat dissipation through hole 121 extends to form a wind dissipation block 123 in the direction of the center line of the heat dissipation through hole 121. On the air outlet side of the heat dissipation through hole 121, a step is formed between the surface of the wind dissipation block 123 and the inner wall of the heat dissipation through hole 121. The airflow flows out from the third through hole 124 and can flow to the fan motor 20 through the surface of the wind dissipation block 123. The wind dissipation block 123 reduces the obstruction of the airflow after passing through the third through hole 124 by increasing the area, and can play a certain role in gathering the airflow toward the axis of the fan motor 20, so that the airflow can better enter the interior of the fan motor 20 through the second through hole 211.

[0096] In the embodiments of the present application, Fig. 9 The direction of the arrow s in the middle is the flow 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 speed of the airflow entering 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 extraction efficiency of the airflow when it flows out of the third through hole 124 can be increased, and the speed of the airflow to the fan motor 20 can be further increased.

[0097] In one embodiment, if Figure 3 and Figure 4 As shown, both ends of the arc through hole 12a extend along a curve to form an edge through hole 12b.

[0098] In this embodiment, when the airflow flows through the edge through hole 12b, the airflow will generate pressure on the periphery of the edge through hole 12b, and the two ends of the arc through hole 12a extend along a curve to form a curved edge through hole 12b. The curved edge through hole 12b, i.e., the non-linear edge through hole 12b, can be stressed at multiple points during the airflow, avoiding concentrated stress, ensuring the stability of the mounting portion 120 structure, and further ensuring the stability of the rotation of the fan blade 10.

[0099] 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.

[0100] 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.

[0101] In one embodiment, if Fig.10 and Fig.11 As shown, 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 .

[0102] 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 .

[0103] In one embodiment, if Fig.10 As shown, the reinforcing ribs also include 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.

[0104] 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.

[0105] 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 a partial 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 .

[0106] In one embodiment, if Fig.11 As shown, 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.

[0107] 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.

[0108] 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. The third reinforcing ribs 1253 are arranged on the inner side of the mounting portion 120 instead of the outer side, so as to avoid disturbing the airflow direction.

[0109] 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.

[0110] 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 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.

[0111] The fan motor 20 provided in the embodiment of the present application is provided with an air hole 310 on the bracket 30, and a water absorbing member 510 is installed in the air hole 310, so that the cavity 34 is transformed from a closed structure to a breathable structure. The water absorbing member 510 can absorb the water vapor in the cavity 34 in time, ensure the dryness in the cavity 34, and then ensure the working stability of the circuit board 60. The cavity 34 with a breathable structure can also enable the fan motor 20 to adjust the pressure balance between the inside and outside of the cavity 34 during operation.

[0112] Specifically, Figure 12 to Figure 14 As shown, 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.

[0113] The bracket 30 is connected to the circuit board 60 , and a vent hole 310 is provided on the bracket 30 .

[0114] The rotor-stator 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 , wherein the rotor-stator assembly is electrically connected to the circuit board 60 .

[0115] 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 .

[0116] 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 .

[0117] In the embodiment of the present application, a vent hole 310 is provided on the bracket 30, and the vent hole 310 is connected to the cavity 34, so that the cavity 34 is transformed from a sealed type to a breathable type. The breathable cavity 34 can balance the internal and external pressure difference generated by the fan motor during operation. In addition, due to the internal and external temperature difference, water vapor in a suspended state will be formed in the cavity 34. The water vapor in the original sealing structure cannot be discharged, and there is a risk of short circuit when it is attached to the circuit board. The breathable structure creatively designed in the present application can use the fluidity of the airflow to bring out the water vapor, and the water absorbent can effectively absorb water vapor on the basis of air permeability, maintain the dryness of the airflow, and effectively solve the disadvantages of the prior art.

[0118] In addition, when the moisture outside the cavity 34 is relatively high, the water absorbing member 510 can also prevent the moisture outside the cavity 34 from entering the cavity 34 and can effectively block dust.

[0119] 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 .

[0120] In an alternative embodiment, if Figures 13 to 15 As shown, the air hole 310 includes a third through hole 311 and a fourth through hole 312 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 . The diameter of the third through hole 311 is greater than that of the fourth through hole 312 .

[0121] That is, the air vent 310 is formed with a third through hole 311 and a fourth through hole 312 of two different diameters, the end of the third through hole 311 is connected to the inside of the cavity 34, and the end of the fourth through hole 312 is connected to the outside of the cavity 34. The diameter of the third through hole 311 is larger than the diameter of the fourth through hole 312, so that the airflow in the cavity 34 can be accelerated during the process of flowing from the third through hole 311 to the fourth through hole 312, so that the water vapor in the cavity 34 can be more easily taken out and then fully absorbed by the water absorbent 510.

[0122] 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-diameter design on the outside can reduce the flow efficiency, further allowing the water absorbent member 510 to fully absorb the water vapor flowing through.

[0123] 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.

[0124] 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 absorbent 510 to block moisture outside the cavity 34 becomes weak, and moisture outside the cavity 34 may enter the cavity 34 .

[0125] 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 overly 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.

[0126] 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 flow efficiency of the airflow inside and outside the cavity 34 and effectively block the 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.

[0127] In an optional embodiment, the water absorbent 510 is located in the third through hole 311. The diameter of the third through hole 311 is greater than the diameter of the fourth through hole 312. Placing the water absorbent 510 in the third through hole 311 can increase the contact area between the water absorbent 510 and the inside of the cavity 34, thereby improving the water absorption effect of the water absorbent 510.

[0128] In an optional embodiment, the breathable component further includes a locking member, the locking member 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 .

[0129] 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.

[0130] In an alternative embodiment, if Fig.14 and Fig.15 As shown, the water absorbing member 510 is located on the bottom wall of the third through hole 311 , the locking member covers and presses on 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 .

[0131] That is to say, the locking member not only abuts against the inner wall of the third through hole 311, but also covers the surface of the water absorbing member 510 to limit the position of the water absorbing member 510 in the third through hole 311, so as to prevent the water absorbing member 510 from moving during the operation of the fan motor and affecting the water absorbing effect. In addition, the shape of the water absorbing member 510 matches the shape of the bottom wall of the third through hole 311, that is, the water absorbing member 510 is a cylindrical structure and the outer diameter of the water absorbing member 510 is equal to the inner diameter of the third through hole 311. It can be understood that the water absorbing member 510 is placed in the third through hole 311 with the largest area.

[0132] 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 at the inner wall of the third through hole 311, and the flange is located between the locking member and the bottom wall of the third through hole 311. In this way, the contact area between the water-absorbing member and the cavity can be increased, thereby improving the water absorption effect.

[0133] The thickness of the water absorbing member 510 may 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.

[0134] The water absorbing member 510 is preferably wool felt, and the wool in the wool felt has a tubular structure, which can absorb water vapor 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.

[0135] In an alternative embodiment, if Fig.16 As shown, 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 .

[0136] That is, there is an interference fit between the column 520 and the third through hole 311, 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.

[0137] In an alternative embodiment, if Fig.15 As shown, the diameter of the fifth through hole 521 is greater than or equal to the diameter of the fourth through hole 312 .

[0138] 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 510 and the cavity 34, thereby improving the water absorption effect of the water absorbent 510.

[0139] In an alternative embodiment, the locking member is a spring (not shown in the figure), which is clamped on the inner wall of the third through hole. Compared with the column 520, the spring occupies less space, which can increase the contact area between the water absorbing member 510 and the inside of the cavity 34, thereby improving the water absorbing effect of the water absorbing member 510.

[0140] In an alternative embodiment, if Fig.14 As shown, 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 hole 310 on the rotor assembly is close to the outer wall of the housing 210, and the air hole 310 is connected to the gap.

[0141] like Fig.14 As shown, the opening of the air hole 310 faces the rotor-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 rotation of the fan is as shown in FIG. Fig.14 In the direction indicated by the arrow, that is, along the direction of the stator axis, when the airflow inside the rotor assembly housing 210 flows to the bracket 30, it flows toward the gap. In this process, the cooling airflow can enter the cavity 34 through the above-mentioned air vents 31, and can form a circulating airflow in the cavity 34 to bring out the water vapor in the cavity 34. In addition, it is also worth noting that when the airflow at the periphery of the housing 210 flows to the gap, it can guide the airflow out of the air vents 310, so that the airflow out of the cavity 34 has directionality, accelerates the outflow of the airflow in the cavity 34, and does not flow back into the cavity 34 and the interior of the housing 210. In addition, it also avoids the influence of excessive water vapor outside the cavity 34 on the stator assembly and the rotor assembly. It should be understood that the above embodiments are exemplary and are not intended to include all possible embodiments included in the claims. Various modifications and changes can be made on the basis of 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 other embodiments of the present application that may not be explicitly described. Therefore, the above embodiments only express several implementation methods of the present application and do not limit the protection scope of the patent of the present application.

Claims

1. A fan device for heat dissipation of an automobile condenser, the fan device comprising 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) comprises a housing (210) and a motor bracket (240), a gap exists between the housing (210) and the motor bracket (240), and an air inlet is provided on a side of the housing (210) close to the fan blade (10); The fan blade (10) comprises 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); and a plurality of heat dissipation through holes (121) are provided on the mounting portion (120); A first airflow flowing from the blade (110) toward the fan motor (20) acts on the periphery of the housing (210); A portion of the second airflow flowing from the heat dissipation through hole (121) toward the fan motor (20) enters the interior of the fan motor (20) 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 (210) and the periphery of the outer shell (210) and merges into the first airflow.

2. The fan device for heat dissipation of an automobile condenser according to claim 1, characterized in that: The mounting portion (120) is provided with a first through hole (126) for connecting the output shaft (220); the axis of the mounting portion (120) is colinearly arranged with the axis of the output shaft (220) and rotates 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.

3. The fan device for heat dissipation of an automobile condenser according to claim 2, characterized in that: The plurality of heat dissipation through holes (121) are evenly distributed on the mounting portion (120) in a ring array.

4. The fan device for heat dissipation of an automobile condenser according to claim 2, characterized in that: The heat dissipation through hole (121) comprises an arc-shaped through hole (12a), and the arc-shaped through hole (12a) corresponds to the side wall of the housing (210).

5. The fan device for heat dissipation of an automobile condenser according to claim 4, characterized in that: In 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); 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); 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).

6. The fan device for heat dissipation of an automobile condenser according to claim 4, 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).

7. The fan device for heat dissipation of an automobile condenser according to claim 6, characterized in that: 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).

8. The fan device for heat dissipation of an automobile 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.

9. The fan device for heat dissipation of an automobile condenser according to claim 8, characterized in that: The air collecting block (122) is formed by extending from the inner wall of at least one side of the heat dissipation through hole (121).

10. The fan device for heat dissipation of an automobile condenser according to claim 9, characterized in that: 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 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).

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

12. The fan device for heat dissipation of an automobile condenser according to claim 6, 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).

13. The fan device for heat dissipation of an automobile condenser according to claim 12, characterized in that: The reinforcing ribs also include second closed reinforcing ribs (1252). In the radial direction of the fan blade (10), the second closed reinforcing ribs (1252) are located on the inner side of the first closed reinforcing ribs (1251), and the second closed reinforcing ribs (1252) form a closed-loop structure.

14. The fan device for heat dissipation of an automobile condenser according to claim 13, characterized in that: 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).

15. The fan device for heat dissipation of an automobile condenser according to claim 13 or 14, characterized in that: The heat dissipation through hole (121) forms a fan blade structure on the mounting portion (120). The reinforcing ribs also include third reinforcing ribs (1253), and a plurality of the third reinforcing ribs (1253) are distributed on a side of the fan blade structure that is disposed toward the fan motor (20).

16. The fan device for heat dissipation of an automobile condenser according to claim 4, characterized in that: The outer shell (210) is provided with a chamfer at the end surface edge facing the arc portion through hole (12a), and the chamfer can guide part of the second airflow flowing through the arc portion through hole (12a) to the side wall of the outer shell (210).

17. The fan device for heat dissipation of an automobile condenser according to claim 1, characterized in that: The fan motor (20) further comprises a rotor assembly and a stator assembly. The rotor assembly is sleeved on the outside of the stator assembly. When the stator assembly is energized, the rotor assembly can be driven to rotate.

18. The fan device for heat dissipation of an automobile condenser according to claim 17, characterized in that: The stator assembly comprises a stator core and a stator core mounting frame (230), and the core mounting frame (230) is provided with at least one hollow area (2a).

19. The fan device for heat dissipation of an automobile condenser according to claim 18, characterized in that: The number of the hollow areas (2a) is three, and the three hollow areas (2a) are evenly distributed circumferentially around the rotation axis of the fan motor (20) and extend along the direction of the rotation axis of the fan motor (20).

20. The fan device for heat dissipation of an automobile condenser according to claim 1, characterized in that: The motor bracket (240) is made of aluminum, and 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.

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