Fan cover, cooling fan, control method of cooling fan and vehicle

Abstract

The invention relates to the technical field of vehicle front end parts, in particular to a fan cover, a cooling fan, a control method of the cooling fan and a vehicle. The fan cover comprises a rotating part, a plurality of linkage parts and blades arranged on the two sides of each linkage part, the rotating part can rotate around a first center, the ends, close to the first center, of the linkage parts are connected with the rotating part, and the blades on the two sides of each linkage part synchronously rotate with the rotating part, so that the fan cover is in an open state or a closed state. The opening and closing state can be adjusted through the fan cover according to the vehicle speed, the problem that when the vehicle runs at a high speed, a cooling fan with a closed and fixed fan cover is not beneficial for cooling air to flow into a cabin is solved, and the cooling effect of the cooling module is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle front-end components, and in particular to a fan cover, a cooling fan and a control method thereof, and a vehicle. Background Art

[0002] The front-end components of a vehicle usually include three major parts: the front-end structural parts, the headlight module, and the cooling module. Among them, the front-end structural parts and the cooling module are components that have an important impact on the gas flow in the engine compartment. The front-end grille of a vehicle is an important front-end structural part. It guides the air flow into the engine compartment and protects cooling components such as the radiator. The front-end grille has an important influence on the front-end air intake effect, air intake quality, and the distribution of the flow field in the vehicle. The cooling module mainly includes a condenser, a radiator, a cooling fan, etc. Among them, the cooling fan is a component in the cooling module used to encourage air recirculation in the vehicle, enhance the heat exchange capacity of the heat exchanger, and accelerate the cooling of the coolant. The pressure performance and working efficiency of the cooling fan directly affect the working capacity of the cooling system.

[0003] In the related art, there are two types of cooling fans in the front-end cooling module of a vehicle: with a fan cover and without a fan cover. For the cooling fan with a fan cover, the fan cover used is usually closed and fixed, and the opening area of ​​the fan cover cannot be changed.

[0004] However, through the simulation analysis of the vehicle cabin flow field and the vehicle thermal balance test, it is known that when the vehicle speed is low, the air intake of the vehicle with a fan hood is greater than that without a fan hood, while when the vehicle speed is too high, the air intake of the vehicle without a fan hood is greater than that of the vehicle with a fan hood. The fan hood does not help the air intake of the cooling module at any vehicle speed and urgently needs to be improved. Summary of the invention

[0005] The present application provides a fan cover, a cooling fan and a control method thereof, and a vehicle, so as to solve the problem that when the vehicle is traveling at high speed, a cooling fan with a closed and fixed fan cover is not conducive to cooling air flowing into the cabin, thereby improving the cooling effect of a cooling module.

[0006] In order to achieve the above-mentioned object, a first embodiment of the present application provides a fan cover, comprising:

[0007] A rotating member, the rotating member is rotatable around a first center;

[0008] A plurality of linkage members and blades are arranged on both sides of each linkage member, one end of the linkage member adjacent to the first center is connected to the rotating member, and the blades on both sides of each linkage member rotate synchronously with the rotating member, so that the fan cover is in an open state or a closed state.

[0009] According to one embodiment of the present application, the rotating member includes:

[0010] a rotating ring, the rotating ring being arranged around the first center;

[0011] A rotating rod is located in the rotating ring, and one end of the rotating rod is connected to the rotating ring.

[0012] According to an embodiment of the present application, the other end of the rotating rod is connected to the motor shaft of the driving motor, and the motor shaft of the driving motor is located at the first center.

[0013] According to one embodiment of the present application, each linkage comprises:

[0014] A linkage ball connected to one axial side of the rotating member;

[0015] A linkage rod, one end of which is connected to the linkage ball, and the other end of which is radially extended and arranged on the edge of the fan cover.

[0016] According to an embodiment of the present application, in the closed state, the angle between the blades on both sides of the multiple linkage members and the fan cover is 0 degrees, and the blades on both sides of two adjacent linkage members are seamlessly connected and closed.

[0017] According to an embodiment of the present application, in the open state, the angle between the blades on both sides of the multiple linkage members and the fan cover is 90 degrees.

[0018] The fan cover proposed in the embodiment of the present application can adjust the opening and closing state according to the vehicle speed, which solves the problem that the cooling fan with a closed and fixed fan cover is not conducive to the flow of cooling air into the cabin when the vehicle is traveling at high speed, thereby improving the cooling effect of the cooling module.

[0019] In order to achieve the above-mentioned purpose, a second embodiment of the present application provides a cooling fan, including the fan cover described in the first embodiment.

[0020] According to the cooling fan proposed in the embodiment of the present application, the fan cover can be used to adjust the opening and closing state according to the vehicle speed, thereby solving the problem that when the vehicle is traveling at high speed, the cooling fan with a closed and fixed fan cover is not conducive to the cooling air flowing into the cabin, thereby improving the cooling effect of the cooling module.

[0021] To achieve the above-mentioned purpose, a third aspect of the present application provides a vehicle, comprising the cooling fan described in the second aspect of the present application.

[0022] To achieve the above object, a fourth aspect of the present application provides a method for controlling a cooling fan, using the cooling fan described in the second aspect of the present application, wherein the method comprises the following steps:

[0023] Collect the vehicle's current speed and current motor water temperature;

[0024] Determining target states of blades on both sides of the plurality of linkage members according to the current vehicle speed and the current motor water temperature;

[0025] If the target state is inconsistent with the current state of the blades on both sides of each linkage member, the rotation direction of the rotating member is determined according to the target state, and the rotation of the rotating member is controlled according to the rotation direction to drive the blades on both sides of each linkage member to rotate synchronously, so that the fan cover is in the open state or the closed state.

[0026] According to an embodiment of the present application, determining the target state of the blades on both sides of the plurality of linkage members according to the current vehicle speed and the current motor water temperature includes:

[0027] If the current vehicle speed is less than the preset vehicle speed, and the current motor water temperature is greater than or equal to the preset water temperature, the target state is the closed state;

[0028] If the current vehicle speed is greater than or equal to the preset vehicle speed, and the current motor water temperature is less than the preset water temperature, the target state is the closed state;

[0029] If the current vehicle speed is less than the preset vehicle speed, and the current motor water temperature is less than the preset water temperature, the target state is the open state;

[0030] If the current vehicle speed is greater than or equal to the preset vehicle speed, and the current motor water temperature is greater than or equal to the preset water temperature, the target state is the open state.

[0031] According to the control method of the cooling fan proposed in the embodiment of the present application, by collecting the current vehicle speed and the current motor water temperature, the target state of the blades on both sides of multiple linkage parts can be determined according to the current vehicle speed and the current motor water temperature. When the target state is inconsistent with the current state of the blades on both sides of each linkage part, the rotation direction of the rotating part can be determined according to the target state, and the rotation of the rotating part can be controlled according to the rotation direction to drive the blades on both sides of each linkage part to rotate synchronously, so that the fan cover is in an open state or a closed state. In this way, the problem that the cooling fan with a closed and fixed fan cover is not conducive to the cooling air flowing into the cabin when the vehicle is driving at high speed is solved, and the cooling effect of the cooling module is improved.

[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 above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] Figure 1 A schematic block diagram of a fan cover provided according to an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the structure of a fan cover provided according to an embodiment of the present application;

[0036] Figure 3 is a schematic diagram of a retractable fan cover according to an embodiment of the present application;

[0037] Figure 4 It is a schematic diagram of a partially enlarged structure of a fan cover according to an embodiment of the present application;

[0038] Figure 5 is a flow chart of a method for controlling a cooling fan according to an embodiment of the present application;

[0039] Figure 6 A flow chart of a method for formulating an opening and closing control strategy for a fan cover according to an embodiment of the present application;

[0040] Figure 7 The present invention is a flowchart of a method for controlling the opening and closing of a fan cover according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0042] The fan cover, cooling fan and control method thereof, and vehicle proposed according to the embodiments of the present application will be described below with reference to the accompanying drawings. First, the fan cover proposed according to the embodiments of the present application will be described with reference to the accompanying drawings.

[0043] Figure 1 It is a schematic structural diagram of a fan cover according to an embodiment of the present application.

[0044] Before introducing the fan cover proposed in the embodiment of the present application, the background thereof is first introduced.

[0045] Electric vehicles mostly use cooling fans to cool the cooling module. When the cooling fan rotates, the cold air flow is sucked into the cabin from the grille. After passing through the cooling module, it exchanges heat with the condenser, radiator, etc., and takes away the heat, thereby cooling the motor system, air conditioning system, etc.

[0046] Through the simulation analysis of the vehicle cabin flow field and the vehicle thermal balance test, it can be known that when the vehicle is traveling at a low speed, the cooling fan plays a dominant role in the air intake of the cooling module. The higher the speed, the higher the air intake of the cooling module and the better the cooling effect, especially for cooling fans with fan covers. The fan cover can gather the cooling airflow to prevent the airflow from diffusing into the cabin and improve the cooling effect. When the vehicle is traveling at a high speed, due to the high speed, the cold airflow entering from the grille plays a dominant role in the air intake of the cooling module. At this time, the cooling fan with a fan cover increases the flow resistance of the cold airflow entering the grille, which is not conducive to the cooling airflow entering the cooling module of the cabin. At this time, the fan cover reduces the cooling efficiency.

[0047] Take a single 300W cooling fan matched with a certain vehicle model as an example. When the vehicle speed is 40km / h, the air intake of the vehicle with a fan cover is 18% greater than that of the vehicle without a fan cover; when the vehicle speed is 80km / h, the air intake of the vehicle without a fan cover is 9% greater than that of the vehicle with a fan cover; and when the vehicle speed is 120km / h, the air intake of the vehicle without a fan cover is 30% greater than that of the vehicle with a fan cover. The greater the power of the cooling fan, the greater the difference in air intake between the vehicle with and without a fan cover. Therefore, the fan cover does not help the air intake of the cooling module at any vehicle speed.

[0048] Based on the above problems, an embodiment of the present application proposes a fan cover, which can adjust the opening and closing state according to the vehicle speed, thereby solving the problem that when the vehicle is driving at high speed, the cooling fan with a closed and fixed fan cover is not conducive to the flow of cooling air into the cabin, thereby improving the cooling effect of the cooling module.

[0049] For example, Figure 1 As shown, the fan cover 10 includes: a rotating member 100, a plurality of linkage members 200 ( Figure 1 Taking one linkage as an example) and the blades ( Figure 1 not shown).

[0050] Among them, combined Figure 2 As shown, the rotating member 100 is rotatable around the first center, and one end of the linkage member 200 adjacent to the first center is connected to the rotating member 100. The blades 300 on both sides of each linkage member 200 rotate synchronously with the rotating member 100, so that the fan cover 10 is in an open state or a closed state.

[0051] Alternatively, if Figure 2 As shown, the rotating member 100 includes: a rotating ring 101 and a rotating rod 102 , wherein the rotating ring 101 is arranged around a first center; the rotating rod 102 is located in the rotating ring 101 , and one end of the rotating rod 101 is connected to the rotating ring 102 .

[0052] Optionally, the other end of the rotating rod 102 is connected to the motor shaft of the driving motor, and the motor shaft of the driving motor is located at the first center.

[0053] Optionally, each linkage member 200 includes: a linkage ball 201 and a linkage rod 202, wherein the linkage ball 201 is connected to one axial side of the rotating member 100; one end of the linkage rod 202 is connected to the linkage ball 201, and the other end of the linkage rod 202 is radially extended and arranged at the edge of the fan cover.

[0054] It can be understood that the opening and closing of the fan cover is related to the vehicle speed and the motor water outlet temperature, that is, when the vehicle speed is low and the motor water temperature is high, and when the vehicle speed is high and the motor water temperature is low, the fan cover is in a closed state, which helps cooling air flow into the cabin; when the vehicle speed is low and the motor water temperature is low, and when the vehicle speed is high and the motor water temperature is high, the fan cover is open, that is, it is in an open state, which helps cooling air flow into the cabin.

[0055] Different models of vehicles have different grille opening sizes, and the layout and location of the cooling module consisting of the condenser, radiator, chiller, and fan are also different. The vehicle speed and motor water temperature corresponding to the opening and closing of the fan cover are also different. This requires a simulation analysis of the vehicle cabin flow field to calculate the air intake volume of the cooling module corresponding to the two states of the fan cover at different vehicle speeds, so as to obtain the optimal vehicle speed range and motor water temperature range for the opening and closing of the fan cover. This vehicle speed range and motor water temperature range can be used as the control strategy of the cooling module, and can be verified and corrected in the prototype vehicle test.

[0056] The fan cover 10 of the embodiment of the present application can realize the switchable characteristics through the fan cover control motor (ie, drive motor), that is, Figure 3 As shown, the VCU (Vehicle Control Unit) can send a rotation instruction to the drive motor according to the current vehicle speed and the current motor water temperature signal, and then control the opening (presenting a state without a fan cover) and closing (presenting a state with a fan cover) of the fan cover through the fan cover control motor.

[0057] Specifically, combined Figure 1 and Figure 4As shown, since the other end of the rotating rod 102 in the rotating member 100 is connected to the motor shaft of the driving motor, when the driving motor rotates, the rotating rod 102 can rotate accordingly, and its rotation direction may be the same as or different from the rotation direction of the driving motor. Since the end of the linkage member 200 adjacent to the first center is connected to the rotating member 100, the linkage ball 201 of the linkage member 200 is connected to one axial side of the rotating member 100. Through a specific transmission method (such as gears, belts, chains, etc.), the rotation of the rotating rod 102 can drive the rotation of the linkage ball 201. One end of the linkage rod 202 is connected to the linkage ball 201, so the rotation of the linkage ball 201 can drive the linkage rod 202 to rotate. Since blades 300 are arranged on both sides of each linkage member 200, when multiple linkage members 200 rotate, the blades 300 on both sides of each linkage member 200 can be driven to rotate synchronously with the rotating member 100, thereby making the fan cover 10 in an open state or a closed state.

[0058] As a possible implementation method, when the fan cover 10 is currently in the open state, the VCU can send a clockwise rotation command to the drive motor according to the vehicle speed and the motor water temperature signal, and the rotating rod 102 connected to the motor shaft rotates clockwise accordingly, so that the linkage part 200 connected to the rotating part 100 rotates clockwise in the plane, driving the blades 300 on both sides of each linkage part 200 to rotate, thereby closing the entire fan cover 10; similarly, when the fan cover 10 is currently in the closed state, the VCU can send a counterclockwise rotation command to the drive motor according to the vehicle speed and the motor water temperature signal, and the rotating rod 102 connected to the motor shaft rotates counterclockwise accordingly, so that the linkage part 200 connected to the rotating part 100 rotates counterclockwise in the plane, driving the blades 300 on both sides of each linkage part 200 to rotate, thereby opening the entire fan cover 10.

[0059] Optionally, in the closed state, the included angle between the blades 300 on both sides of the plurality of linkage members 200 and the fan cover 10 is 0 degrees, and the blades 300 on both sides of two adjacent linkage members 200 are seamlessly connected and closed.

[0060] It is understandable that when the fan cover 10 is in the closed state, the angle between the blades 300 on both sides of the multiple linkage parts 200 and the fan cover 10 is 0 degrees. Since each blade is independent, the blades 300 on both sides of two adjacent linkage parts 200 can be seamlessly connected and closed to achieve the fan cover state.

[0061] Optionally, in the open state, the included angle between the blades 300 on both sides of the plurality of linkage members 200 and the fan cover 10 is 90 degrees.

[0062] That is to say, when the fan cover 10 is in the open state, the included angle between the blades 300 on both sides of the plurality of linkage members 200 and the fan cover 10 is 90 degrees, thereby achieving a state without a fan cover.

[0063] It should be noted that the embodiment of the present application realizes the opening and closing states of the fan cover by driving the drive motor to rotate for a certain period of time to drive other devices to rotate. Since the speed of the drive motor can affect the opening or closing speed of the blades, the friction between the drive motor and the rotating member, the friction between the rotating member and the linkage member, and the friction between the linkage member and the blades on both sides thereof can all affect the rotation time of the drive motor. The magnitude of the friction may be related to the current position of the blade, the degree of wear and lubrication of the device, etc. Therefore, a test bench including the drive motor, the rotating member, the linkage member and the blade can be constructed. Based on the control variable method, other parameters (such as power supply voltage, etc.) are fixed, and only the speed of the drive motor and each friction force are changed (different friction forces can be simulated by replacing devices or adjusting the degree of lubrication), and the time required for the drive motor to rotate to open or close the fan cover under different motor speeds and friction forces is recorded. According to the test results, a control strategy for the drive motor is formulated. Considering the change of friction force in actual use, the system can include an adaptive or feedback mechanism to adjust the rotation time of the drive motor in real time.

[0064] The fan cover proposed in the embodiment of the present application can adjust the opening and closing state according to the vehicle speed, which solves the problem that the cooling fan with a closed and fixed fan cover is not conducive to the flow of cooling air into the cabin when the vehicle is traveling at high speed, thereby improving the cooling effect of the cooling module.

[0065] The present application provides a cooling fan, which includes Figure 1 A fan cover of an embodiment.

[0066] According to the cooling fan proposed in the embodiment of the present application, the fan cover can be used to adjust the opening and closing state according to the vehicle speed, thereby solving the problem that when the vehicle is traveling at high speed, the cooling fan with a closed and fixed fan cover is not conducive to the cooling air flowing into the cabin, thereby improving the cooling effect of the cooling module.

[0067] An embodiment of the present application also provides a vehicle, which includes the above-mentioned cooling fan.

[0068] Figure 5 A cooling fan control method is proposed in an embodiment of the present application.

[0069] like Figure 5 As shown, the control method of the cooling fan adopts the above cooling fan, wherein the method comprises the following steps:

[0070] In step S501, the current vehicle speed and the current motor water temperature are collected.

[0071] Specifically, the current vehicle speed (vehicle speed sensor can be used) and current motor water temperature (temperature sensor can be used) can be collected in real time through corresponding sensors. These two parameters are the key to accurately controlling the opening and closing of the fan cover in the cooling module according to the control strategy.

[0072] In step S502, the target states of the blades on both sides of the plurality of linkage parts are determined according to the current vehicle speed and the current motor water temperature.

[0073] That is to say, based on the current vehicle speed and current motor water temperature collected by the sensor, the control strategy obtained through simulation analysis can determine the target state of the blades on both sides of the multiple linkage parts of the fan cover under different vehicle speed and motor water temperature combinations.

[0074] The following describes in detail how to determine the target states of the blades on both sides of the multiple linkage parts based on the current vehicle speed and the current motor water temperature.

[0075] As a possible implementation method, in some embodiments, the target state of the blades on both sides of multiple linkage parts is determined based on the current vehicle speed and the current motor water temperature, including: if the current vehicle speed is less than the preset vehicle speed, and the current motor water temperature is greater than or equal to the preset water temperature, then the target state is the closed state; if the current vehicle speed is greater than or equal to the preset vehicle speed, and the current motor water temperature is less than the preset water temperature, then the target state is the closed state; if the current vehicle speed is less than the preset vehicle speed, and the current motor water temperature is less than the preset water temperature, then the target state is the open state; if the current vehicle speed is greater than or equal to the preset vehicle speed, and the current motor water temperature is greater than or equal to the preset water temperature, then the target state is the open state.

[0076] Among them, the preset vehicle speed and the preset water temperature are both vehicle speed values ​​and water temperature values ​​obtained by technical personnel in this field through a limited number of experiments or a limited number of computer simulations, and are not specifically limited here.

[0077] Specifically, according to the fan hood opening and closing control strategy obtained by simulation analysis, if the current vehicle speed collected is less than the preset vehicle speed and the current motor water temperature is greater than or equal to the preset water temperature, or the current vehicle speed collected is greater than or equal to the preset vehicle speed and the current motor water temperature is less than the preset water temperature, then the target state of the blades on both sides of the multiple linkage parts should be the closed state (that is, the angle between the blades on both sides of the multiple linkage parts and the fan hood is 0 degrees); if the current vehicle speed collected is less than the preset vehicle speed and the current motor water temperature is less than the preset water temperature, or the current vehicle speed collected is greater than or equal to the preset vehicle speed and the current motor water temperature is greater than or equal to the preset water temperature, then the target state of the blades on both sides of the multiple linkage parts should be the open state (that is, the angle between the blades on both sides of the multiple linkage parts and the fan hood is 90 degrees).

[0078] In step S503, if the target state is inconsistent with the current state of the blades on both sides of each linkage member, the rotation direction of the rotating member is determined according to the target state, and the rotating member is controlled to rotate according to the rotation direction to drive the blades on both sides of each linkage member to rotate synchronously, so that the fan cover is in an open state or a closed state.

[0079] That is to say, after determining the target state of the blades on both sides of the multiple linkage parts, the rotation direction of the rotating part can be determined according to the target state, and the VCU sends a rotation instruction to the drive motor, so that the drive motor controls the rotation of the rotating part according to the rotation direction, thereby driving the blades on both sides of each linkage part to rotate synchronously, so as to achieve the blades on both sides of the multiple linkage parts are in the target state.

[0080] To facilitate those skilled in the art to further understand the cooling fan control method proposed in the embodiment of the present application, the following is a Figure 6 and Figure 7 Make further additions.

[0081] like Figure 6 As shown, the method for formulating the opening and closing control strategy of the fan cover may include the following steps:

[0082] Step S601, collecting vehicle data and establishing a vehicle cabin flow field simulation analysis model.

[0083] Step S602, calculating the air intake volume of the cooling module with and without the fan cover at different vehicle speeds and different motor water temperatures.

[0084] Step S603, determining the vehicle speed range and motor water temperature range corresponding to the opening and closing of the fan cover.

[0085] Step S604, input into the vehicle control strategy.

[0086] Step S605, a prototype vehicle test verifies the air intake volume of the cooling module with or without a fan cover at different vehicle speeds and motor water temperatures.

[0087] Step S606, determine whether the control strategy needs to be adjusted. If yes, execute step S604, otherwise, end the process.

[0088] Furthermore, if Figure 7 As shown, the method for controlling the opening and closing of the fan cover may include the following steps:

[0089] Step S701: The vehicle speed sensor reads the current vehicle speed, and the temperature sensor reads the current motor water temperature.

[0090] Step S702: The VCU determines whether the fan cover is open or closed based on the current vehicle speed and the current motor water temperature.

[0091] Step S703: a control signal is sent to the fan cover control motor (ie, drive motor).

[0092] Step S704, controlling the fan cover to open or close.

[0093] Step S705, read the current vehicle speed and the current motor water temperature every 10 minutes to determine whether the fan cover state has changed. If so, execute step S703, otherwise, end the process.

[0094] According to the control method of the cooling fan proposed in the embodiment of the present application, by collecting the current vehicle speed and the current motor water temperature, the target state of the blades on both sides of multiple linkage parts can be determined according to the current vehicle speed and the current motor water temperature. When the target state is inconsistent with the current state of the blades on both sides of each linkage part, the rotation direction of the rotating part can be determined according to the target state, and the rotation of the rotating part can be controlled according to the rotation direction to drive the blades on both sides of each linkage part to rotate synchronously, so that the fan cover is in an open state or a closed state. In this way, the problem that the cooling fan with a closed and fixed fan cover is not conducive to the cooling air flowing into the cabin when the vehicle is driving at high speed is solved, and the cooling effect of the cooling module is improved.

[0095] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0097] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fan cover, characterized in that: include: a rotating member, the rotating member being rotatable about a first center; A plurality of linkage members and blades are arranged on both sides of each linkage member, one end of the linkage member adjacent to the first center is connected to the rotating member, and the blades on both sides of each linkage member rotate synchronously with the rotating member, so that the fan cover is in an open state or a closed state.

2. The fan cover according to claim 1, characterized in that: The rotating member comprises: a rotating ring, the rotating ring being arranged around the first center; A rotating rod is located in the rotating ring, and one end of the rotating rod is connected to the rotating ring.

3. The fan cover according to claim 2, characterized in that: The other end of the rotating rod is connected to the motor shaft of the driving motor, and the motor shaft of the driving motor is located at the first center.

4. The fan cover according to claim 1, characterized in that: Each linkage includes: A linkage ball connected to one axial side of the rotating member; A linkage rod, one end of which is connected to the linkage ball, and the other end of which is radially extended and arranged on the edge of the fan cover.

5. The fan cover according to claim 1, characterized in that: In the closed state, the angle between the blades on both sides of the plurality of linkage members and the fan cover is 0 degrees, and the blades on both sides of two adjacent linkage members are seamlessly connected and closed.

6. The fan cover according to claim 1, characterized in that: In the open state, the angle between the blades on both sides of the plurality of linkage members and the fan cover is 90 degrees.

7. A cooling fan, characterized in that: include: A fan cover as claimed in any one of claims 1 to 6.

8. A vehicle, characterized in that: include: The cooling fan as claimed in claim 7.

9. A method for controlling a cooling fan, characterized in that: The cooling fan according to claim 7 is used, wherein the method comprises the following steps: Collect the vehicle's current speed and current motor water temperature; Determining target states of blades on both sides of the plurality of linkage members according to the current vehicle speed and the current motor water temperature; If the target state is inconsistent with the current state of the blades on both sides of each linkage member, the rotation direction of the rotating member is determined according to the target state, and the rotation of the rotating member is controlled according to the rotation direction to drive the blades on both sides of each linkage member to rotate synchronously, so that the fan cover is in the open state or the closed state.

10. The method according to claim 9, characterized in that The step of determining the target states of the blades on both sides of the plurality of linkage members according to the current vehicle speed and the current motor water temperature includes: If the current vehicle speed is less than the preset vehicle speed, and the current motor water temperature is greater than or equal to the preset water temperature, the target state is the closed state; If the current vehicle speed is greater than or equal to the preset vehicle speed, and the current motor water temperature is less than the preset water temperature, the target state is the closed state; If the current vehicle speed is less than the preset vehicle speed, and the current motor water temperature is less than the preset water temperature, the target state is the open state; If the current vehicle speed is greater than or equal to the preset vehicle speed, and the current motor water temperature is greater than or equal to the preset water temperature, the target state is the open state.

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