Automobile air outlet control method and device

Abstract

This invention relates to a method and apparatus for controlling the air outlet of an automobile, comprising: calculating the air outlet data of the automobile air conditioning outlet; inputting the air outlet data into a finite element model within a set sweeping cycle to obtain the sweeping speed of the air outlet; and controlling the air outlet of the automobile according to the sweeping speed, so as to solve the problem that the air outlet cannot be automatically adjusted in the prior art.

Description

Technical Field

[0001] This invention relates to the field of automotive control technology, specifically to a method and device for controlling automotive air vents. Background Technology

[0002] As a convenient means of transportation, automobiles play an important role in people's daily lives. With the rapid development of intelligent technology, automobiles are quickly becoming more intelligent, providing people with better services.

[0003] In recent years, the design and installation of electric air vents have alleviated the problem of adjusting air vents in the cabin to some extent, thus providing people with a comfortable space environment. However, the adjustment of the air vent system is still a passive adjustment behavior, which cannot intelligently identify the temperature inside the car and adjust accordingly. Therefore, how to achieve automatic adjustment of the air vents has become one of the problems that urgently need to be solved. Summary of the Invention

[0004] One objective of this invention is to provide a method for controlling the air outlet of an automobile, so as to solve the problem that the air outlet cannot be automatically adjusted in the prior art; another objective is to provide an automobile air outlet control device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for controlling the air outlet of an automobile includes: calculating air outlet data of the automobile's air conditioning outlet; inputting the air outlet data into a finite element model within a set sweeping cycle to obtain the sweeping speed of the air outlet; and controlling the air outlet of the automobile according to the sweeping speed.

[0007] Based on the above technical means, the intelligent adjustment of the air conditioner's electric air outlet is realized by using the finite element model. That is, the finite element model can obtain different sweeping speeds corresponding to different air outlet data, realize the one-to-one correspondence between the air outlet angle and the sweeping speed, and adjust different sweeping cycles according to different usage scenarios, thereby realizing the active adjustment of the air outlet's sweeping speed and meeting the personalized needs of drivers and passengers.

[0008] Furthermore, the calculation of the air vent data of the car's air conditioning vent includes:

[0009] The system acquires the air outlet location information of the vehicle's air conditioning system, the first distance between the air outlet location information and the driver, and the second distance from the extreme position of the air outlet to the occupant's center axis.

[0010] The air outlet data is calculated based on the air outlet location information, the first distance, and the second distance.

[0011] Based on the aforementioned technical means, the air outlet data can be calculated by taking into account the location of the vehicle's air conditioning vent, the first distance between the vent location and the driver, and the second distance from the vent's extreme position to the passenger's centerline. This allows the sweeping coverage of the vehicle's electric air vent to be determined, ensuring that the airflow direction is consistent with the vent blade adjustment direction.

[0012] Furthermore, before inputting the sweeping angle into the finite element model to obtain the outlet velocity within the set sweeping cycle, the method further includes: synchronizing the blade position of the outlet to determine the start time of the sweeping cycle.

[0013] Based on the aforementioned technical means, synchronizing the position of the air outlet blades is to avoid the problem of unclear sweeping effect caused by the initial position of the air outlet blades not being placed at the extreme position.

[0014] Furthermore, the air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a first extreme position and the right air outlet includes a second extreme position;

[0015] The synchronization of the blade position at the air outlet includes:

[0016] When the operating mode of the car air conditioner is parallel sweep mode, the first time taken for the blade of the left air outlet to rotate from the initial position to the first extreme position and the second time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position are obtained.

[0017] If the first duration is greater than the second duration, the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time delay.

[0018] If the first duration is less than the second duration, the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time delay.

[0019] According to the above technical means, if the first duration is greater than the second duration, the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time difference; if the first duration is less than the second duration, the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time difference, thereby ensuring that the blades of the left and right air outlets rotate to the right limit position at the same time, improving the accuracy of air outlet output.

[0020] Furthermore, the air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a third extreme position and the right air outlet includes a second extreme position;

[0021] The synchronization of the blade position at the air outlet includes:

[0022] When the operating mode of the car air conditioner is symmetrical sweep mode, the third time taken for the blade of the left air outlet to rotate from the initial position to the third extreme position and the fourth time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position are obtained.

[0023] If the third duration is greater than the fourth duration, the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time delay.

[0024] If the third duration is less than the fourth duration, the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time delay.

[0025] According to the above technical means, if the third duration is greater than the fourth duration, the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time difference; if the third duration is less than the fourth duration, the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time difference, thereby ensuring that the blades of the left and right air outlets rotate to the right limit position at the same time, improving the accuracy of air outlet output.

[0026] Furthermore, the finite element model is generated in the following way:

[0027] A computational fluid domain for the passenger compartment is generated based on the automotive interior data.

[0028] The blade computation domain is constructed based on the blade position information of the air outlet;

[0029] An interface is constructed based on the computational fluid domain of the crew compartment and the computational domain of the blades to generate a finite element model.

[0030] The above-mentioned technical methods have improved computing performance.

[0031] Furthermore, controlling the vehicle's air outlet based on the sweeping speed includes:

[0032] Obtain the maximum and minimum values ​​of the sweeping speed;

[0033] Determine whether the maximum or minimum value meets the set threshold under the application scenario. If it does, control the air outlet of the car according to the sweeping speed.

[0034] If the conditions are not met, the sweeping cycle shall be adjusted.

[0035] Based on the aforementioned technical means, during the left and right sweeping process, directional and non-directional air blowing can be achieved according to the maximum and minimum values ​​of the sweeping speed, thus meeting the personalized needs of drivers and passengers.

[0036] An automotive air outlet control device includes: a calculation module for calculating air outlet data of the automotive air conditioning outlet; and an input module for inputting the air outlet data into a finite element model within a set sweeping cycle to obtain the sweeping speed of the air outlet.

[0037] The control module is used to control the air outlet of the vehicle according to the sweeping speed.

[0038] Furthermore, the computing module includes:

[0039] The first acquisition unit is used to acquire the air outlet position information of the vehicle air conditioner, the first distance between the air outlet position information and the driver, and the second distance from the extreme position of the air outlet to the occupant center axis.

[0040] The calculation unit is used to calculate the air outlet data based on the air outlet location information, the first distance, and the second distance.

[0041] Furthermore, the device also includes:

[0042] The synchronization module is used to synchronize the position of the blades at the air outlet.

[0043] Furthermore, the air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a first extreme position and the right air outlet includes a second extreme position;

[0044] The synchronization module includes:

[0045] The first time unit is used to acquire, when the operating mode of the car air conditioner is parallel sweep mode, the first time taken for the blade of the left air outlet to rotate from the initial position to the first extreme position and the second time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position.

[0046] The first rotating unit is configured to, if the first duration is greater than the second duration, then the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time delay.

[0047] The second rotating unit is configured to, if the first duration is less than the second duration, then the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time delay.

[0048] Furthermore, the air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a third extreme position and the right air outlet includes a second extreme position;

[0049] The synchronization module includes:

[0050] The second time unit is used to acquire the third time taken for the blade of the left air outlet to rotate from the initial position to the third extreme position and the fourth time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position when the operating mode of the car air conditioner is symmetrical sweep mode.

[0051] The third rotating unit is used to start rotating the blades of the left air outlet if the third duration is greater than the fourth duration, and to start rotating the blades of the right air outlet after the delay time difference.

[0052] The fourth rotation unit is used to make the blades of the right air outlet start rotating if the third time duration is less than the fourth time duration, and the blades of the left air outlet start rotating after the time delay.

[0053] Furthermore, the input module generates the finite element model in the following ways:

[0054] A computational fluid domain unit is used to generate a passenger compartment computational fluid domain based on the automotive interior data.

[0055] The blade computation domain unit is used to construct the blade computation domain based on the blade position information of the air outlet.

[0056] The construction unit is used to construct the interface based on the computational fluid domain of the crew compartment and the computational domain of the blade, and generate a finite element model.

[0057] Furthermore, the control module includes:

[0058] The second acquisition unit is used to acquire the maximum and minimum values ​​of the sweeping speed;

[0059] The judgment unit is used to determine whether the maximum value or the minimum value meets the set threshold under the application scenario. If it meets the threshold, the air outlet of the car is controlled according to the sweeping speed. If it does not meet the threshold, the sweeping cycle is adjusted.

[0060] The beneficial effects of this invention are:

[0061] (1) This invention utilizes a finite element model to achieve intelligent adjustment of the air conditioning outlet. That is, the finite element model can obtain different sweeping speeds corresponding to different air outlet data, realize the one-to-one correspondence between the air outlet angle and the sweeping speed, and adjust different sweeping cycles according to different usage scenarios, thereby realizing active adjustment of the air outlet sweeping speed and meeting the personalized needs of drivers and passengers.

[0062] (2) The present invention calculates the air outlet data of the air outlet based on the air outlet position of the vehicle air conditioner, the first distance between the air outlet position information and the driver, and the second distance from the extreme position of the air outlet to the center axis of the passenger, so as to determine the sweeping coverage of the electric air outlet of the car, thus ensuring that the air outlet direction and the air outlet blade adjustment direction are consistent. Attached Figure Description

[0063] Figure 1 This is a flowchart of a car air outlet control method according to the present invention;

[0064] Figure 2 This is a schematic diagram of an electric air vent for automobiles according to the present invention;

[0065] Figure 3 A schematic diagram illustrating the setting of monitoring points for the driver in this invention;

[0066] Figure 4 This is a schematic diagram of the air outlet structure of the present invention;

[0067] Figure 5 This is a schematic diagram of the blade structure of the air outlet of the present invention;

[0068] Figure 6 This is a flowchart of a car air outlet control method according to the present invention;

[0069] Figure 7 This is a schematic diagram of the structure of an automotive air vent control device according to the present invention. Detailed Implementation

[0070] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0071] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0072] See Figure 1 The flowchart below illustrates a method for controlling the air outlet of an automobile, as provided in an embodiment of the present invention. The method includes:

[0073] Step 101: Calculate the air vent data of the car's air conditioning vent.

[0074] Because each car manufacturer is different, the number of air conditioning vents on a car will also be different. Therefore, a car's air conditioning vents can include one left vent and one right vent, or they can include at least one left vent and at least one right vent. Each vent includes a left limit position and a right limit position. The left limit position can be understood as the left boundary of the vent, and the right limit position can be understood as the right boundary of the vent. For example, the left vent includes a left limit position and a right limit position, and the right vent also includes a left limit position and a right limit position.

[0075] The air outlet data includes: the air outlet angle. The air outlet angle can be used to determine the sweeping coverage of the car's electric air outlet. That is, the air outlet angle can be used to determine the sweeping coverage of the car's electric left and right air outlets. This can ensure that the air outlet direction is consistent with the air outlet blade adjustment direction.

[0076] As one implementation method, step 101 includes the following sub-steps:

[0077] Sub-step 1011: Obtain the air outlet location information of the vehicle air conditioner, the first distance between the air outlet location information and the driver, and the second distance from the extreme position of the air outlet to the occupant's center axis.

[0078] The location information of the vehicle's air conditioning vents includes the location information of the left air vent and the right air vent. Therefore, it is necessary to obtain the location information of the left air vent and the right air vent of the vehicle's air conditioning system.

[0079] Obtain the distance in the X and Y directions between the air vent location and the driver. In other words, obtain the distance in the X and Y directions between the left air vent and the driver's breathing point, and obtain the distance in the X and Y directions between the right air vent and the driver's breathing point.

[0080] In practical applications, the air vents include a left air vent and a right air vent. Thus, each air vent has its own extreme position. That is, the left air vent has a left extreme position and a right extreme position, and the right air vent also has a left extreme position and a right extreme position. Therefore, we obtain the second distance from the left extreme position of the left air vent to the left side of the occupant (driver) center axis, and the second distance from the right extreme position of the left air vent to the right side of the occupant center axis. We also obtain the second distance from the left extreme position of the right air vent to the left side of the occupant center axis, and the second distance from the right extreme position of the right air vent to the right side of the occupant center axis.

[0081] The second distance from the left extreme position of the left air outlet to the left side of the occupant's center axis, and the second distance from the right extreme position of the left air outlet to the right side of the occupant's center axis, are all fixed values ​​determined based on experience. Generally, the left extreme position of the left air outlet reaches 400mm to the left of the occupant's center axis, and the right extreme position of the left air outlet reaches 50mm to the right of the occupant's center axis.

[0082] The second distance from the left extreme position of the right air vent to the left side of the occupant centerline is obtained, and the second distance from the right extreme position of the right air vent to the right side of the occupant centerline is obtained. The above second distances are fixed values ​​determined based on experience. Generally, the left extreme position of the right air vent should reach 50mm to the left of the occupant centerline; the right extreme position of the right air vent should reach 100mm to the right of the vehicle centerline.

[0083] It should be noted that the left and right extreme positions refer to the left and right boundaries of the air vent.

[0084] Sub-step 1012: Calculate the air outlet data based on the air outlet location information, the first distance, and the second distance.

[0085] After sub-step 1011, the air outlet location information, the first distance, and the second distance have been obtained. Therefore, the air outlet angles of the left and right air outlets can be calculated based on the air outlet location information, the first distance, and the second distance.

[0086] The following is based on Figure 2 Taking an example, the process of calculating the air outlet angle of the present invention will be explained in detail.

[0087] exist Figure 2 The system includes: left air outlet 1, right air outlet 2, driver 3, monitoring point 4 (driver's nose tip), monitoring point 5, located at the left extreme position of the left air outlet, and monitoring point 6, located at the right extreme position of the right air outlet. The wind speed at monitoring points 4-6 is measured to determine whether it meets the requirements of the application scenario.

[0088] If the left limit air outlet angle is A1, then the left limit air outlet angle can be calculated using the following formula:

[0089] A1 = arctan((L2-L1) / L3)

[0090] Wherein, L1 is the distance in the Y direction from the driver's centerline to the left air vent, L2 is the second distance from the left extreme position of the left air vent to the occupant's centerline, and the second distance is generally a fixed value. Preferred, the second distance is 400mm, and L3 is the distance in the X direction from the driver's face to the left air vent.

[0091] If the rightmost extreme air outlet angle of the left air outlet is A2, then the rightmost extreme air outlet angle of the left air outlet can be calculated using the following formula:

[0092] A2 = arctan((L4 + L1) / L3)

[0093] Where L1 is the distance in the Y direction from the driver's centerline to the left air vent, L4 is not marked in the figure, L4 is the second distance from the right limit position of the left air vent to the occupant's centerline, the second distance is generally a fixed value, preferably 50mm, and L3 is the distance in the X direction from the driver's face to the left air vent.

[0094] After the above steps, the calculated air outlet angle range for the left vent is: the left extreme air outlet angle is greater than or equal to A1, and the right extreme air outlet angle is greater than or equal to A2.

[0095] If the right limit air outlet angle is B1, then the right limit air outlet angle can be calculated using the following formula:

[0096] B1 = arctan((R2-R1+R4) / R3)

[0097] Where R1 is the Y-direction distance between the driver's centerline and the right air vent, R2 is the length between the driver's centerline and the vehicle's centerline, R3 is the X-direction distance between the driver's face and the right air vent, and R4 (not marked in the diagram) is the second distance that the right limit coverage of the driver's right air vent should reach to the right side of the vehicle's centerline. Generally, the second distance is a fixed value, and preferably, the second distance is 100mm.

[0098] If the leftmost extreme air outlet angle of the right air outlet is B2, then the leftmost extreme air outlet angle of the right air outlet can be calculated using the following formula:

[0099] B2 = arctan((R5 + R1) / R3)

[0100] Where R1 is the Y-direction distance between the driver's centerline and the right air vent, R3 is the X-direction distance between the driver's face and the right air vent, and R5 (not marked in the diagram) is the second distance that the driver's right air vent should cover to the left of the vehicle's centerline. Generally, the second distance is a fixed value, and preferably, it is 50mm.

[0101] After the above steps, the calculated air outlet angle range for the left air outlet is: the left limit air outlet angle is greater than or equal to B2, and the right limit air outlet angle is greater than or equal to B1.

[0102] Step 102: Within the set sweeping cycle, input the air outlet data into the finite element model to obtain the sweeping velocity of the air outlet.

[0103] To ensure that all air outlet motors operate with consistent sound and reduce noise, the time for blade rotation reversal should be consistent. Therefore, a sweeping cycle T needs to be set. The sweeping cycle refers to the time required for the blades of the electric air outlet to move from the right limit to the left limit and then back to the right limit.

[0104] The finite element model uses STARCCM+ simulation software. STARCCM+ is a new generation CFD solver developed by CD-adapco using state-of-the-art computational continuum mechanics. It incorporates CD-adapco's proprietary mesh generation technology, enabling it to perform a series of tasks required for mesh generation, including complex shape data input, surface preparation (such as cladding (preserving shape, simplifying geometry, automatically filling holes, preventing component contact, and checking for leaks), surface mesh reconstruction, and automatic volume mesh generation (including polyhedral meshes, hexahedral core meshes, dodecahedral core meshes, and tetrahedral meshes). STARCCM+ uses the polyhedral mesh advocated by CD-adapco, which, compared to the original tetrahedral mesh, can achieve a computational performance improvement of approximately 3 to 10 times while maintaining the same computational accuracy.

[0105] In practical applications, finite element models are generated in the following ways:

[0106] First, a computational fluid domain for the passenger compartment is generated based on the vehicle interior data.

[0107] The external surfaces of the air conditioning unit, air duct, dashboard, center console, door panels, glass, carpet, sunroof, A, B, and C pillars are extracted from the automotive interior data. After the surface data is meshed by simulation software, the software automatically fills holes, prevents parts from contacting each other, and checks for leaks to make all parts form a closed cavity. This cavity is the computational fluid domain of the passenger compartment.

[0108] Secondly, a blade computation domain is constructed based on the blade position information of the air outlet.

[0109] The air outlet includes a left air outlet and a right air outlet. A blade calculation domain is established for the blade position information of the left air outlet and the blade position information of the right air outlet, respectively. That is, a closed chamber is established for each blade, and the chamber is the blade calculation domain of the left and right blades.

[0110] Each blade's computational domain formed by the left and right blades should include the blade itself and a cylinder capable of containing the blade. The central axis of the cylinder should be aligned with the blade's rotation axis, and the cylinder's radius and height should both be 2mm larger than the blade's rotation radius and height.

[0111] Next, an interface is constructed based on the computational fluid domain of the crew compartment and the computational domain of the blades to generate a finite element model.

[0112] An Overset Mesh interface is created for each blade computational domain and the crew cabin computational domain. Then, Overset Mesh interfaces are created between adjacent blade domains to complete the corresponding finite element model construction and enable simulation calculations. Next, the duct inlet of the crew cabin computational fluid domain is set as the inlet boundary of the entire finite element model, with the boundary type set to mass flow inlet. The boundary type of the rear boundary of the crew cabin computational fluid domain is set to pressure outlet, and the boundary type of the remaining boundaries is set to wall.

[0113] Preferably, the air volume at the inlet boundary is 0.029625 kg / s, and the boundary pressure at the pressure outlet is 1.01 × 10⁵ Pa.

[0114] The finite element model in this invention is mainly used for illustration. To simplify the processed model, such as... Figure 3 , Figure 4 , Figure 5 As shown, the face meshes of the driver and air vents in the simplified model and their relative positions are consistent with the actual vehicle model. The remaining boundaries are simplified to rectangular faces. The occupants and air vents together form a closed cavity, namely the computational fluid domain of the occupant compartment.

[0115] Figure 3 This is a schematic diagram of the monitoring points set up around the driver. Monitoring point 1 is the left air outlet monitoring point, used to monitor the sweep speed of the left air outlet. Monitoring point 2 is the right air outlet monitoring point, used to monitor the sweep speed of the right air outlet. Monitoring point 3 is the shoulder monitoring point, used to monitor the sweep speed of the driver's body. Monitoring point 4 is the driver's nose tip monitoring point, used to monitor the sweep speed of the driver's face.

[0116] The following uses the left air outlet as an example to illustrate the components of the left air outlet. Figure 4 In the middle, the left air outlet 1 consists of an air outlet shell 101, an air outlet vertical adjustment blade 102, and air outlet horizontal adjustment blades 103, 104, 105, 106, and 107. The horizontal adjustment blades include a boundary grid 1031 and blades 1032. The boundary grid 1031 is a cylinder completely containing blades 1032. The central axis of the cylinder is aligned with the blade rotation axis. The cylinder's radius and height are both 2mm larger than the blade's rotation radius and height. Together, they form a blade computational domain, namely the horizontal adjustment blade fluid computational domain. Figure 5As shown, the boundary type of boundary mesh 1031 is set to Overset Mesh. All left and right adjustable blades are composed of boundary meshes and blades. The remaining boundaries, excluding the left and right adjustable blades, form the crew cabin computational domain. In the STARCCM+ simulation software, an Overset Mesh interface is created between the crew cabin computational domain and the computational domains of all left and right adjustable blades at the air vents, thereby enabling data exchange. The air inlet of each duct in the crew cabin domain is set as the inlet boundary of the entire finite element model, with the boundary type set to mass flow inlet and the air volume set to 0.029625 kg / s. The boundary type of the rear boundary of the crew cabin domain is set to pressure outlet and the boundary pressure is set to 1.01 × 10⁵ Pa. The boundary type of the remaining boundaries is set to wall.

[0117] Create a new Rotation motion node in the Motions node, and apply Rotation to the Physics node in the Region boundary node to achieve the function of adjusting the blade rotation left and right. The rotation speed is calculated using the following formula:

[0118] W L =2*(A1+A2) / T

[0119] W R =2*(B1+B2) / T

[0120] Among them, W L W represents the blade rotation speed at the left air outlet. R T is the rotational speed of the blades at the right air outlet, T is the time required for the blades to go from the right limit to the left limit and then back to the right limit, which is the set sweeping cycle, A1 is the left limit air outlet angle of the left air outlet, A2 is the right limit air outlet angle of the left air outlet, B1 is the right limit air outlet angle of the right air outlet, and B2 is the right limit air outlet angle of the right air outlet.

[0121] It should be noted that the composition of the right air outlet is the same as that of the left air outlet. The specific structure can be referred to the composition of the left air outlet. This invention will not describe it in detail.

[0122] Step 103: Control the air outlet of the vehicle according to the sweeping speed.

[0123] In this embodiment, the intelligent adjustment of the air conditioning vent is achieved using a finite element model. That is, the finite element model can obtain different sweeping speeds corresponding to different air outlet angles, realizing a one-to-one correspondence between air outlet angle and sweeping speed. Furthermore, different sweeping cycles can be adjusted according to different usage scenarios, thereby achieving active adjustment of the air outlet sweeping speed and meeting the personalized needs of drivers and passengers.

[0124] See Figure 6The above is a flowchart of an image calibration method provided by an embodiment of the present invention. The method is applied to an in-vehicle terminal and includes:

[0125] Step 601: Calculate the air vent data of the car's air conditioning vent.

[0126] As one implementation, step 601 includes the following sub-steps:

[0127] Sub-step 6011: Obtain the air outlet position information of the vehicle air conditioner, the first distance between the air outlet position information and the driver, and the second distance from the extreme position of the air outlet to the occupant centerline.

[0128] The location information of the vehicle's air conditioning vents includes the location information of the left air vent and the right air vent. Therefore, it is necessary to obtain the location information of the left air vent and the right air vent of the vehicle's air conditioning system.

[0129] Obtain the distance in the X and Y directions between the air vent location and the driver. In other words, obtain the distance in the X and Y directions between the left air vent and the driver's breathing point, and obtain the distance in the X and Y directions between the right air vent and the driver's breathing point.

[0130] In practical applications, the air outlet includes a left air outlet and a right air outlet. Thus, each air outlet has its own extreme position. That is, the left air outlet has a left extreme position and a right extreme position, and the right air outlet also has a left extreme position and a right extreme position. Therefore, we obtain the second distance from the left extreme position of the left air outlet to the left side of the occupant center axis, and the second distance from the right extreme position of the left air outlet to the right side of the occupant center axis. We also obtain the second distance from the left extreme position of the right air outlet to the left side of the occupant center axis, and the second distance from the right extreme position of the right air outlet to the right side of the occupant center axis.

[0131] The second distance from the left extreme position of the left air outlet to the left side of the occupant's center axis, and the second distance from the right extreme position of the left air outlet to the right side of the occupant's center axis, are all fixed values ​​determined based on experience. Generally, the left extreme position of the left air outlet reaches 400mm to the left of the occupant's center axis, and the right extreme position of the left air outlet reaches 50mm to the right of the occupant's center axis.

[0132] The second distance from the left extreme position of the right air vent to the left side of the occupant centerline is obtained, and the second distance from the right extreme position of the right air vent to the right side of the occupant centerline is obtained. The above second distances are fixed values ​​determined based on experience. Generally, the left extreme position of the right air vent should reach 50mm to the left of the occupant centerline; the right extreme position of the right air vent should reach 100mm to the right of the vehicle centerline.

[0133] It should be noted that the left and right extreme positions refer to the left and right boundaries of the air vent.

[0134] Sub-step 6012: Calculate the air outlet data based on the air outlet location information, the first distance, and the second distance.

[0135] After sub-step 6011, the air outlet location information, the first distance, and the second distance have been obtained. Therefore, the air outlet angles of the left and right air outlets can be calculated based on the air outlet location information, the first distance, and the second distance.

[0136] Step 602: Synchronize the position of the blades at the air outlet to determine the start time of the sweeping cycle.

[0137] Before the actual air conditioner's electric air outlet swing is activated, the blades of the left and right air outlets may not be initially positioned at the right limit. Therefore, before the swing cycle begins, it should be ensured that the blades of the left and right air outlets are synchronously positioned at the right limit. When the blades of the left and right air outlets are synchronously positioned at the right limit, the start time of the swing cycle is determined.

[0138] The air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a first extreme position and the right air outlet includes a second extreme position, wherein the first extreme position refers to the right extreme position of the left air outlet and the second extreme position refers to the right extreme position of the right air outlet.

[0139] In practical applications, the blade positions of the air outlet can be synchronized in the following ways:

[0140] One implementation method: Step 602 includes the following sub-steps:

[0141] Sub-step 6021: When the operating mode of the car air conditioner is parallel sweep mode, obtain the first time taken for the blade of the left air outlet to rotate from the initial position to the first extreme position and obtain the second time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position.

[0142] Specifically, in parallel sweep mode, if the left air outlet blade moves from its initial position at a W... L The first time taken for the rotational speed to reach the right limit is t1, and the right air outlet blade moves from the initial position at W... R The second time taken for the rotational speed to reach the right limit is t2.

[0143] W can be calculated in the following ways. L and W R :

[0144] W L =2*(A1+A2) / T

[0145] W R =2*(B1+B2) / T

[0146] Among them, W L is the blade rotation speed of the left air outlet, and W R is the blade rotation speed of the right air outlet. T is the time required for the blade to move from the right limit to the left limit and then reverse back to the right limit, that is, the set sweeping cycle. A1 is the left limit air outlet angle of the left air outlet, A2 is the right limit air outlet angle of the left air outlet, B1 is the right limit air outlet angle of the right air outlet, and B2 is the right limit air outlet angle of the right air outlet.

[0147] Sub-step 6022: If the first duration is greater than the second duration, the blades of the left air outlet start to rotate, and the blades of the right air outlet start to rotate after a time difference delay.

[0148] Sub-step 6023: If the first duration is less than the second duration, the blades of the right air outlet start to rotate, and the blades of the left air outlet start to rotate after a time difference delay.

[0149] Among them, the time difference delay is the difference between the first duration and the second duration. If the first duration t1 is greater than the second duration t2, the blades of the left air outlet start to rotate, and the blades of the right air outlet start to rotate after (t2 - t1) moment, so as to ensure that the blades of the left and right air outlets rotate to the right limit position at the same moment, and this moment is used as the starting point of the sweeping cycle timing.

[0150] If t1 < t2, the right air outlet starts to rotate first, and the left air outlet starts to rotate after (t2 - t1) moment, so as to ensure that the blades of the left and right air outlets rotate to the right limit position at the same moment, and this moment is used as the starting point of the sweeping cycle timing.

[0151] Another implementation method: Step 602 includes the following sub-steps:

[0152] The air outlet includes: a left air outlet and a right air outlet. Among them, the left air outlet includes: a third limit position, and the right air outlet includes: a second limit position. Among them, the third limit position refers to the left limit position of the left air outlet, and the second limit position refers to the right limit position of the right air outlet.

[0153] Sub-step 6024: When the operation mode of the automotive air conditioner is the symmetric sweeping mode, obtain the third duration for the blades of the left air outlet to rotate from the initial position to the third limit position and the fourth duration for the blades of the right air outlet to rotate from the initial position to the second limit position;

[0154] Sub-step 6025: If the third duration is greater than the fourth duration, the blades of the left air outlet start to rotate, and the blades of the right air outlet start to rotate after a time difference delay;

[0155] Sub-step 6026: If the third duration is less than the fourth duration, the blades of the right air outlet start to rotate, and the blades of the left air outlet start to rotate after a time difference delay.

[0156] Specifically, in the symmetric sweeping mode, if the time t3 taken for the left air outlet blades to rotate from the initial position to the left limit at the rotation speed W L is greater than the time t4 taken for the right air outlet blades to rotate from the initial position to the right limit at the rotation speed W R then the left air outlet blades start to rotate first, and the right air outlet starts to rotate after the time (t2 - t1), so as to ensure that the blades of the left and right air outlets rotate to the right limit position at the same moment, and this moment is used as the starting point for timing the sweeping cycle.

[0157] In the symmetric sweeping mode, if t3 < t4, the right air outlet starts to rotate first, and the left air outlet starts to rotate after the time (t2 - t1), so as to ensure that the blades of the left and right air outlets rotate to the right limit position at the same moment, and this moment is used as the starting point for timing the sweeping cycle.

[0158] Step 603: Within the set sweeping cycle, input the air outlet data into the finite element model to obtain the sweeping speed of the air outlet.

[0159] Step 604: Obtain the maximum value and the minimum value of the sweeping speed.

[0160] Step 605: Determine whether the maximum value or the minimum value meets the set threshold in the application scenario. If it meets, execute Step 606; if not, execute Step 607.

[0161] Step 606: Control the air output of the vehicle according to the sweeping speed.

[0162] Step 607: Adjust the sweeping cycle and re-execute Steps 603 - 606.

[0163] Among them, the set threshold includes the maximum threshold of the sweeping speed and the minimum threshold of the sweeping speed. The setting of the threshold can be set by those skilled in the art in any appropriate manner, such as setting the threshold according to the application scenario, or setting the threshold for the difference value of historical data. The present invention does not limit this.

[0164] Within one sweep cycle, the variation pattern of the sweep speed is recorded, along with the times corresponding to the maximum and minimum sweep speed values, and the rotation angle of the outlet blades. It is then determined whether the maximum and minimum values ​​meet the set thresholds for the application scenario. If they do, the sweep speed corresponding to the maximum or minimum value is output. The maximum or minimum value can be used to determine whether the air conditioner operates in a direct-to-human blowing mode or a non-human blowing mode. Generally, the position of the blades at the maximum sweep speed is determined as the direct-to-human blowing mode, and the position of the blades at the minimum sweep speed is determined as the non-human blowing mode.

[0165] If the conditions are not met, the swing cycle can be adjusted. Shortening the swing cycle can increase the swing speed at the air outlet, while extending the swing cycle can decrease the swing speed at the air outlet, thereby achieving different swing settings for different application scenarios.

[0166] For example:

[0167] Scenario 1: During vehicle development, based on user-defined requirements, the car's air conditioning operation mode is set to either "directly blowing towards people" or "avoiding people." In this application scenario, the required airflow speed to the driver's face in the "directly blowing towards people" mode is... Figure 3 The wind speed at monitoring point 4 is greater than 1.8 m / s, and the coverage area is the head; in the mode of avoiding people from being blown, the wind speed at monitoring point 4 is less than 0.5 m / s.

[0168] Within one sweep cycle, based on the sweep velocity V = f(t) output by the finite element model, the maximum and minimum values ​​of the sweep velocity are obtained. It is then determined whether the maximum or minimum sweep velocity meets the design requirements, specifically whether it satisfies the wind speed requirement for the driver's face under the blow-on mode. Figure 3 Monitoring point 4 has a wind speed greater than 1.8 m / s, covering the head area; in the avoidance-blowing mode, the wind speed at monitoring point 4 is less than 0.5 m / s. If these conditions are met, the corresponding blade position is output as the design state for both the avoidance-blowing and avoidance-blowing modes. If these conditions are not met, it can guide the optimization of the air outlet structure, the blade rotation limit angle, or the adjustment of the sweeping cycle, etc.

[0169] Scenario 2: When the interior temperature of the vehicle is high, the user sets the fan speed to high and the air temperature to low, and activates the swing mode. Based on the scenario requirements, the following is necessary: Figure 3 The temperature at monitoring point 4 is below 21℃ and the temperature fluctuation is less than 1℃. This requires the face wind speed at monitoring point 4 to be below 0.5m / s and the time to be less than 5s. Based on this standard, the process of inputting the air outlet data into the finite element model to obtain the sweeping speed of the air outlet is repeated. The maximum and minimum values ​​of the sweeping speed are obtained, and it is determined whether the maximum or minimum value meets the set threshold under the application scenario. If it does not meet the threshold, the sweeping cycle T is adjusted until the wind speed at monitoring point 4 meets the requirements.

[0170] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to this application.

[0171] Based on the description of the above method embodiments, the present invention also provides corresponding device embodiments to implement the content described in the above method embodiments.

[0172] Reference Figure 7 The diagram shows a structural schematic of an automotive air vent control device according to an embodiment of the present invention, the device comprising:

[0173] The calculation module 701 is used to calculate the air outlet data of the car's air conditioning vents;

[0174] The input module 702 is used to input the air outlet data into the finite element model within a set sweeping cycle to obtain the sweeping velocity of the air outlet.

[0175] The control module 703 is used to control the air outlet of the vehicle according to the sweeping speed.

[0176] Furthermore, the computing module includes:

[0177] The first acquisition unit is used to acquire the air outlet position information of the vehicle air conditioner, the first distance between the air outlet position information and the driver, and the second distance from the extreme position of the air outlet to the occupant center axis.

[0178] The calculation unit is used to calculate the air outlet data based on the air outlet location information, the first distance, and the second distance.

[0179] Furthermore, the device also includes:

[0180] The synchronization module is used to synchronize the position of the blades at the air outlet.

[0181] Furthermore, the air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a first extreme position and the right air outlet includes a second extreme position;

[0182] The synchronization module includes:

[0183] The first time unit is used to acquire, when the operating mode of the car air conditioner is parallel sweep mode, the first time taken for the blade of the left air outlet to rotate from the initial position to the first extreme position and the second time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position.

[0184] The first rotating unit is configured to, if the first duration is greater than the second duration, then the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time delay.

[0185] The second rotating unit is configured to, if the first duration is less than the second duration, then the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time delay.

[0186] Furthermore, the air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a third extreme position and the right air outlet includes a second extreme position;

[0187] The synchronization module includes:

[0188] The second time unit is used to acquire the third time taken for the blade of the left air outlet to rotate from the initial position to the third extreme position and the fourth time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position when the operating mode of the car air conditioner is symmetrical sweep mode.

[0189] The third rotating unit is used to start rotating the blades of the left air outlet if the third duration is greater than the fourth duration, and to start rotating the blades of the right air outlet after the delay time difference.

[0190] The fourth rotation unit is used to make the blades of the right air outlet start rotating if the third time duration is less than the fourth time duration, and the blades of the left air outlet start rotating after the time delay.

[0191] Furthermore, the input module generates the finite element model in the following ways:

[0192] A computational fluid domain unit is used to generate a passenger compartment computational fluid domain based on the automotive interior data.

[0193] A blade computational domain unit is used to construct a blade computational domain based on the air outlet data.

[0194] The construction unit is used to construct the interface based on the computational fluid domain of the crew compartment and the computational domain of the blade, and generate a finite element model.

[0195] Furthermore, the control module includes:

[0196] The second acquisition unit is used to acquire the maximum and minimum values ​​of the sweeping speed;

[0197] The judgment unit is used to determine whether the maximum value or the minimum value meets the set threshold under the application scenario. If it meets the threshold, the air outlet of the car is controlled according to the sweeping speed. If it does not meet the threshold, the sweeping cycle is adjusted.

[0198] In this embodiment, the air conditioner vents are intelligently adjusted using a finite element model. Different sweeping cycles can be adjusted according to different usage scenarios, thereby actively adjusting the sweeping speed of the vents and meeting the personalized needs of drivers and passengers.

[0199] The above-described apparatus embodiments are basically similar to the method embodiments, so the description is relatively simple. For relevant details, please refer to the description of the method embodiments shown.

[0200] It will be readily apparent to those skilled in the art that any combination of the above embodiments is feasible, and therefore any combination of the above embodiments constitutes an implementation of the present invention. However, due to space limitations, each embodiment will not be described in detail here. Although preferred embodiments of the present invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0201] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A method of controlling air outlet of an automobile, characterized by, include: Calculate the air vent data of the car's air conditioning vents; Within a set sweeping cycle, the air outlet data is input into a finite element model to obtain the sweeping velocity of the air outlet; The vehicle's airflow is controlled according to the sweeping speed; The finite element model is generated in the following way: A computational fluid domain for the passenger compartment is generated based on the automotive interior data. A blade computational domain is constructed for each blade based on the blade position information of the air outlet; the blade computational domain formed by each left and right blade includes the blade itself and a cylinder containing the blade, with the central axis of the cylinder and the blade rotation axis being consistent. An interface is constructed based on the computational fluid domain of the crew compartment and the computational domain of the blades to generate a finite element model; wherein, the interface is constructed through each computational domain of the blades and the computational domain of the crew compartment, or through the construction between adjacent computational domains of the blades; The method further includes: Within one sweeping cycle, the variation pattern of the sweeping speed is recorded, and the times corresponding to the maximum and minimum values ​​of the sweeping speed are recorded, as well as the rotation angle of the air outlet blades. It is determined whether the maximum and minimum values ​​meet the set threshold under the application scenario. If they do, the sweeping speed corresponding to the maximum or minimum value is output, and the air conditioning operation mode is adjusted based on the maximum or minimum value.

2. The method according to claim 1, characterized in that, The calculation of the air vent data for the car's air conditioning vents includes: The system acquires the air outlet location information of the vehicle's air conditioning system, the first distance between the air outlet location information and the driver, and the second distance from the extreme position of the air outlet to the occupant's center axis. The air outlet data is calculated based on the air outlet location information, the first distance, and the second distance.

3. The method according to claim 1, characterized in that, Before inputting the air outlet data into the finite element model to obtain the air outlet sweep velocity within the set sweeping cycle, the method further includes: The position of the blades at the air outlet is synchronized to determine the start time of the sweeping cycle.

4. The method according to claim 3, characterized in that, The air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a first extreme position and the right air outlet includes a second extreme position; The synchronization of the blade position at the air outlet includes: When the operating mode of the car air conditioner is parallel sweep mode, the first time taken for the blade of the left air outlet to rotate from the initial position to the first extreme position and the second time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position are obtained. If the first duration is greater than the second duration, the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time delay. If the first duration is less than the second duration, the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time delay.

5. The method according to claim 3, characterized in that, The air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a third extreme position and the right air outlet includes a second extreme position; The synchronization of the blade position at the air outlet includes: When the operating mode of the car air conditioner is symmetrical sweep mode, the third time taken for the blade of the left air outlet to rotate from the initial position to the third extreme position and the fourth time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position are obtained. If the third duration is greater than the fourth duration, the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time delay. If the third duration is less than the fourth duration, the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time delay.

6. The method according to claim 1, characterized in that, The step of controlling the vehicle's airflow according to the sweeping speed includes: Obtain the maximum and minimum values ​​of the sweeping speed; Determine whether the maximum and minimum values ​​meet the set threshold for the application scenario. If they do, control the air outlet of the car according to the sweeping speed. If the conditions are not met, the sweeping cycle shall be adjusted.

7. A car air vent control device, characterized in that, include: The calculation module is used to calculate the air vent data of the car's air conditioning vents; The input module is used to input the air outlet data into the finite element model within a set sweeping cycle to obtain the sweeping velocity of the air outlet. The control module is used to control the air outlet of the vehicle according to the sweeping speed; The input module generates the finite element model in the following ways: A computational fluid domain unit is used to generate a passenger compartment computational fluid domain based on the automotive interior data. The blade calculation domain unit is used to construct a blade calculation domain for each blade based on the blade position information of the air outlet; the blade calculation domain formed by each left and right blade includes the blade itself and a cylinder containing the blade, and the central axis of the cylinder is consistent with the blade rotation axis. A construction unit is used to construct an interface based on the crew cabin computational fluid domain and the blade computational domain to generate a finite element model; wherein, the interface is constructed through each blade computational domain and the crew cabin computational domain, or through adjacent blade computational domains; The device further includes: Within one sweeping cycle, the variation pattern of the sweeping speed is recorded, and the times corresponding to the maximum and minimum values ​​of the sweeping speed are recorded, as well as the rotation angle of the air outlet blades. It is determined whether the maximum and minimum values ​​meet the set threshold under the application scenario. If they do, the sweeping speed corresponding to the maximum or minimum value is output, and the air conditioning operation mode is adjusted based on the maximum or minimum value.

8. The apparatus according to claim 7, characterized in that, The computing module includes: The first acquisition unit is used to acquire the air outlet position information of the vehicle air conditioner, the first distance between the air outlet position information and the driver, and the second distance from the extreme position of the air outlet to the occupant center axis. The calculation unit is used to calculate the air outlet data based on the air outlet location information, the first distance, and the second distance.

9. The apparatus according to claim 7, characterized in that, The device further includes: The synchronization module is used to synchronize the position of the blades at the air outlet and determine the start time of the sweeping cycle.

10. The apparatus according to claim 9, characterized in that, The air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a first extreme position and the right air outlet includes a second extreme position; The synchronization module includes: The first time unit is used to acquire, when the operating mode of the car air conditioner is parallel sweep mode, the first time taken for the blade of the left air outlet to rotate from the initial position to the first extreme position and the second time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position. The first rotating unit is configured to, if the first duration is greater than the second duration, then the blades of the left air outlet begin to rotate, and the blades of the right air outlet begin to rotate after the time delay. The second rotating unit is configured to, if the first duration is less than the second duration, then the blades of the right air outlet begin to rotate, and the blades of the left air outlet begin to rotate after the time delay.

11. The apparatus according to claim 9, characterized in that, The air outlet includes a left air outlet and a right air outlet, wherein the left air outlet includes a third extreme position and the right air outlet includes a second extreme position; The synchronization module includes: The second time unit is used to acquire the third time taken for the blade of the left air outlet to rotate from the initial position to the third extreme position and the fourth time taken for the blade of the right air outlet to rotate from the initial position to the second extreme position when the operating mode of the car air conditioner is symmetrical sweep mode. The third rotating unit is used to start rotating the blades of the left air outlet if the third duration is greater than the fourth duration, and to start rotating the blades of the right air outlet after the delay time difference. The fourth rotation unit is used to make the blades of the right air outlet start rotating if the third time duration is less than the fourth time duration, and the blades of the left air outlet start rotating after the time delay.

12. The apparatus according to claim 7, characterized in that, The control module includes: The second acquisition unit is used to acquire the maximum and minimum values ​​of the sweeping speed; The judgment unit is used to determine whether the maximum value and the minimum value meet the set threshold under the application scenario. If they meet the threshold, the air outlet of the car is controlled according to the sweeping speed. If they do not meet the threshold, the sweeping cycle is adjusted.

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