Air outlet position determination method, automobile air outlet system, control method and automobile

Abstract

This invention relates to a method for determining the location of an air outlet, comprising: determining a point R; determining the lower limit blowing point and the fully open blowing point based on the point R, and determining the location of the air outlet. This invention also relates to an automotive air outlet system, a control method, and an automotive vehicle, comprising an air outlet housing, an upper air outlet trim piece, a lower air outlet trim piece, an air outlet feature piece, and outer blades; the air outlet housing is installed at the air outlet location, and the air outlet location is obtained using the air outlet location determination method; the angle α1 between the upper air outlet trim piece and the upper housing and the upper housing is ≥ 55°; the angle α2 between the lower air outlet trim piece and the lower housing is 25° ≤ α2 ≤ 30°; the angle α3 between the windward surface of the air outlet feature piece and the lower housing is 135° ≤ α3 ≤ 140°; the length of the windward surface of the air outlet feature piece is d1, and 2.5mm ≤ d1 ≤ 3mm. The automotive air outlet system of this invention enables adjustment of the air outlet's up and down airflow direction based on user gestures under motor-free conditions.

Description

Technical Field

[0001] This invention belongs to the field of automotive air vents, specifically relating to a method for determining the location of an air vent, an automotive air vent system, a control method, and an automotive. Background Technology

[0002] With the iterative advancement of vehicle electrification, minimalist and intelligent interior design has become the industry trend. Minimalism means that the air vents are concealed, without obvious control blades or knobs; intelligence means that the air vents can quickly and accurately adjust the airflow direction according to the driver's needs and operations. Currently, to achieve intelligent and electric adjustment of the air vent direction, the vent must be equipped with motors for left-right and up-down airflow adjustment, along with corresponding linkage mechanisms. The hardware cost is several times higher than that of ordinary air vents. Furthermore, to recognize user gestures, cameras, controllers, and other components must be configured, along with corresponding software development. The costs are difficult to predict, resulting in low returns in today's highly competitive automotive market.

[0003] Patent document CN 109733163 A discloses an automatic air vent system and control method for automobiles. The system's hardware includes a controller, an air vent assembly, a processor, and a vehicle bus. Control signals are generated through a human-machine interface system and the air conditioning control system. These signals are communicated via the vehicle system's CAN bus or LIN bus, sent by the processor, and connected to the motor drive circuit, ultimately sending relevant operating commands to the motor. This system enables blade control of the electric air vents, allowing users to adjust the airflow direction through screen operation or pre-programmed settings. However, the system is complex to debug, requires high precision in the fit between the motor and the air vent components, and is costly.

[0004] For example, patent document CN 111959232 A discloses a method, storage medium, and electronic device for controlling automotive air conditioning vents. This method captures driver image information through a camera, acquires gesture signals, and begins parsing them. It then compares these signals with pre-stored gesture commands to determine whether to generate a direction adjustment signal for the air conditioning vents based on the degree of matching. This method requires hardware including various controllers, processors, vent assemblies (including motors), and buses, as well as a storage device and a camera, with program instructions stored in the storage device. While this method achieves user gesture control, it places demands on the user; the user's gestures must be aligned with the camera. In special conditions such as excessively strong or insufficient light, inaccurate recognition, errors, and false triggering may occur. Furthermore, the system is costly.

[0005] Therefore, it is necessary to develop a new method for determining the location of air vents, an automotive air vent system, a control method, and an automotive system. Summary of the Invention

[0006] The purpose of this invention is to provide a method for determining the location of an air outlet. An air outlet designed using this method, in conjunction with other parameters of the air outlet, can achieve up-and-down airflow adjustment of the air outlet based on user gestures under motor-free conditions.

[0007] Another objective of this invention is to provide an automotive air vent system that allows for adjustment of the airflow direction via user gestures, even without a motor.

[0008] Another objective of this invention is to provide a control method for an automotive air vent system, which enables the user to adjust the up and down airflow direction of the air vents via gestures when the automotive air vent system is without a motor.

[0009] Another objective of this invention is to provide a car that, in the absence of a motor in the car's air vent system, allows for adjustment of the airflow direction of the vents via user gestures.

[0010] In a first aspect, the method for determining the location of the air outlet according to the present invention includes the following steps: S101: Determine the seating reference point, i.e., point R, based on the overall vehicle layout. Point R is the center position of the hinge between the human torso and thigh, which is the hip point when the seat is adjusted to the rearmost and lowest position. S102: Determine the lower limit blowing point and the full opening blowing point based on point R, specifically: The point located directly above point R and at a height of H0 in the Z direction from point R is designated as the lower limit blowing point, and the point located directly above the lower limit blowing point and at a height of H1 in the Z direction from the lower limit blowing point is designated as the full-open blowing point; wherein, the lower limit blowing point is the waist of the simulated dummy arranged in the vehicle; and the full-open blowing point is the breathing port area of ​​the simulated dummy arranged in the vehicle. S103: Determine the location of the air outlet, specifically: Point P, which is L1 in the X direction and H2 in the Z direction from point R, is designated as the air outlet. Calculate the angle A1 between the fully open air outlet direction and the lower limit air outlet direction, and determine whether A1 satisfies: 25°≤A1≤30°. If it satisfies: then point P is the air outlet. If it does not satisfy: then adjust H2 and L1, redetermine point P, and calculate the value of A1 until A1 satisfies: 25°≤A1≤30°. Wherein, the fully open air outlet direction is the direction of the line connecting the air outlet to the fully open blowing point; the lower limit air outlet direction is the direction of the line connecting the air outlet to the lower limit blowing point.

[0011] Optionally, the formula for calculating the angle A1 between the fully open air outlet direction and the lower limit air outlet direction is as follows: A1=arctan((H1-H2+H0) / L1)+arctan((H2-H0) / L1).

[0012] Optionally, the value of H0 is 100mm to 150mm; the value of H1 is 450mm to 550mm.

[0013] Secondly, the automotive air vent system of the present invention includes an air vent housing, an upper air vent trim, a lower air vent trim, an air vent feature piece, and an outer blade. The air outlet housing is installed at the air outlet position, and the air outlet position is determined by the air outlet position determination method as described in this invention. The air vent housing includes an upper housing and a lower housing. The upper decorative part of the air vent is connected to the air outlet end of the upper housing, the air vent feature is connected to the air outlet end of the lower housing, the lower decorative part of the air vent is connected to the air vent feature, and the outer blade is located in the middle of the upper housing and the lower housing and is parallel to the upper housing and the lower housing. The angle between the decorative part on the air vent and the upper shell and the upper shell is denoted as the first included angle α1, and α1 ≥ 55°; The angle between the plane of the decorative part under the air vent and the lower shell is denoted as the second included angle α2, and 25°≤α2≤30°; The angle between the windward side of the air vent feature and the lower shell is denoted as the third included angle α3, and 135°≤α3≤140°; The length of the windward side of the air vent feature is d1, and 2.5mm≤d1≤3mm.

[0014] Optionally, the leeward side of the air vent feature is parallel to the plane on the lower decorative part of the air vent, and the leeward side protrudes from the plane.

[0015] Optionally, the absolute value of the difference between the second included angle α2 and the included angle A1 between the fully open air outlet direction and the lower limit air outlet direction is less than or equal to 2°.

[0016] Optionally, the parallel extension line of the outer blades is in the designed fully open air outlet direction.

[0017] Optionally, the parallel extension direction of the plane of the decorative element below the air vent is the designed lower limit air outlet direction.

[0018] Thirdly, the control method for the automotive air vent system of the present invention uses the automotive air vent system as described in the present invention, and the control method includes: When there are no first or second control components controlling the air outlet, the upper and lower decorative parts of the air outlet have no air guiding effect. The airflow is blown out after being guided by the air outlet shell and the outer blades. Its air outlet direction is parallel to the direction of the upper shell, the lower shell and the outer blades. The first control component has an air guiding surface that is parallel to the outer blades, and the second control component has an air guiding surface that is parallel to the plane of the lower decorative part of the air outlet. When the air outlet is controlled by the first control component, the upper and lower decorative parts of the air outlet have no air guiding effect. The airflow is blown out after being guided by the air outlet shell, the outer blades and the first control component. As the first control component moves away from the air outlet parallel to the outer blades, the final air outlet direction is parallel to the direction of the upper shell, the lower shell and the outer blades. When there is a second control component outside the air outlet, the decorative part on the air outlet has no air guiding effect. The airflow first passes through the air outlet shell and the outer blades, and then is blown out after being guided by the lower decorative part and the second control component. As the second control component moves away from the air outlet parallel to the plane of the lower decorative part, the final direction of the air outlet is parallel to the plane of the lower decorative part.

[0019] Fourthly, the automobile described in this invention employs the automobile air vent system as described in this invention.

[0020] The present invention has the following advantages: The present invention does not require high-cost components such as air outlet motors, controllers and cameras, nor does it require traditional air outlet components such as adjustable blades and knobs. It can realize the adjustment of airflow direction according to control components (such as: occupant gestures or a relatively flat board or book). That is, it can realize the adjustment of air outlet up and down airflow direction based on user gestures in the absence of a motor, thereby greatly reducing hardware costs. At the same time, it simplifies the interior styling of automobiles and is more conducive to the stylization and simplification of interior design. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart of the air outlet location design method in this embodiment; Figure 2 This is a schematic diagram showing the design of the air outlet location in this embodiment; Figure 3 This is a schematic diagram of the car air vent system in this embodiment; Figure 4 for Figure 3 A schematic diagram showing a partial detail; Figure 5 This is a schematic diagram of the air outlet system in this embodiment; Figure 6 This is a flowchart of the air outlet air direction control method in this embodiment; Figure 7 This is a schematic diagram of the air outlet design method in this embodiment; Figure 8 for Figure 7 A detailed flowchart of step S202 in the middle section; In the diagram: 101, R point; 102, lower limit blowing point; 103, fully open blowing point; 104, air outlet; 201, air outlet housing; 2011, upper housing; 2012, lower housing; 202, air outlet feature; 2021, windward side; 2022, leeward side; 203, lower decorative part of air outlet; 2031, plane; 204, upper decorative part of air outlet; 2041, profile; 205, outer blade; 206, first crew member's hand gesture; 207, second crew member's hand gesture. Detailed Implementation

[0023] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0024] like Figure 1 and Figure 2 As shown in this embodiment, a method for determining the location of an air outlet includes the following steps: S101: Determine the seating reference point based on the overall vehicle layout, namely R point 101. R point 101 is the simulated center position of the human torso and thigh hinge, which is the hip point when the seat is adjusted to the last and lowest position. S102: Based on point R 101, determine the lower limit blowing point 102 and the full-open blowing point 103, specifically as follows: The point located directly above point R101 and at a Z-direction height of H0 from point R is designated as the lower limit blowing point 102, and the point located directly above the lower limit blowing point 102 and at a Z-direction height of H1 from the lower limit blowing point 102 is designated as the full-open blowing point 103; wherein, the lower limit blowing point 102 is the waist of the simulated dummy arranged in the vehicle; and the full-open blowing point 103 is the breathing port area of ​​the simulated dummy arranged in the vehicle. S103: Determine the location of the air outlet, specifically: Point P, which is L1 in the X direction and H2 in the Z direction from point R, is designated as air outlet 104; Calculate the angle A1 between the fully open air outlet direction and the lower limit air outlet direction, and determine whether A1 satisfies: 25°≤A1≤30°. If A1 satisfies 25°≤A1≤30° in the CAS layout scheme, then point P is the air outlet 104. If A1 does not satisfy 25°≤A1≤30°, then adjust H2 and L1, redetermine point P, and calculate the value of A1 until A1 satisfies: 25°≤A1≤30°. Wherein, the fully open air outlet direction is the direction of the line connecting the air outlet 104 to the fully open blowing point 103; the lower limit air outlet direction is the direction of the line connecting the air outlet 104 to the lower limit blowing point 102.

[0025] In this embodiment, the formula for calculating the angle A1 between the fully open air outlet direction and the lower limit air outlet direction is as follows: A1=arctan((H1-H2+H0) / L1)+arctan((H2-H0) / L1).

[0026] In this embodiment, the value of H0 is 100mm to 150mm, and in one example, the value of H0 is 115mm; the value of H1 is 450mm to 550mm.

[0027] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, an automotive air vent system includes an air vent housing 201, an upper air vent decorative component 204, a lower air vent decorative component 203, an air vent feature component 202, and an outer blade 205. The vent housing 201 is installed at the air outlet position, which is determined using the air outlet position determination method described in this embodiment. The vent housing 201 includes an upper housing 2011 and a lower housing 2012. The upper vent decorative piece 204 is connected to the air outlet end of the upper housing 2011, the vent feature piece 202 is connected to the air outlet end of the lower housing 2012, the lower vent decorative piece 203 is connected to the vent feature piece 202, and the outer blade 205 is located between the upper housing 2011 and the lower housing 2012, and is parallel to the upper housing 2011 and the lower housing 2012.

[0028] In this embodiment, the air vent housing 201, the air vent feature 202, the lower air vent decorative part 203, the upper air vent decorative part 204, and the outer blade 205 together form the air guide channel.

[0029] In this embodiment, the decorative part 204 on the air vent has no air guiding function in the entire air outlet system. The included angle between the surface 2041 where the decorative part 204 on the air vent connects to the upper housing 2011 and the upper housing 2011 is denoted as the first included angle α1. In the design, α1 is required to be ≥55° to avoid the Coanda effect and prevent the decorative part 204 on the air vent from adsorbing the airflow.

[0030] In this embodiment, the lower decorative part 203 of the air vent will produce or not produce airflow guiding effect according to the user's needs. The included angle between the plane 2031 of the lower decorative part 203 and the lower shell 2012 is denoted as the second included angle α2. In the design, it is required that the absolute value of the difference between the second included angle α2 and the included angle A1 of the fully open air outlet direction and the lower limit air outlet direction is less than or equal to 2°, and 25°≤α2≤30°.

[0031] In this embodiment, to enable the air vent decorative component 203 to change its air guiding effect at any time according to the user's needs, the angle between the windward side 2021 of the air vent feature 202 and the lower shell 2012 is denoted as the third included angle α3. The design requirements are: 135°≤α3≤140°; the length of the windward side 2021 of the air vent feature 202 is d1, and 2.5mm≤d1≤3mm; the leeward side 2022 of the air vent feature 202 is parallel to the plane 2031 on the air vent decorative component 203, and the distance d2 from the leeward side 2022 protruding from the plane 2031 is between 0.4mm and 0.6mm.

[0032] In this embodiment, a control method for an automotive air vent system is provided. The system uses the automotive air vent system described in this embodiment, with the first control component being a first occupant gesture 206 and the second control component being a second occupant gesture 207 as an example. The palm serves as the air guide surface. In the first occupant gesture 206, the palm is parallel to the outer blade 205, and in the second occupant gesture 207, the palm is parallel to the plane of the lower decorative element 203 of the air vent. The control method includes: When there is no first occupant hand gesture 206 or second occupant hand gesture 207 controlling the air outlet, the upper decorative part 204 and lower decorative part 203 of the air outlet have no air guiding effect. The airflow is blown out after being guided by the air outlet housing 201 and the outer blade 205, and its air outlet direction is parallel to the direction of the upper housing 2011, the lower housing 2012 and the outer blade 205. When the first occupant's hand gesture 206 controls the air outlet, that is, when the palm is parallel to the outer blade 205, the upper decorative part 204 and the lower decorative part 203 of the air outlet have no air guiding effect. The airflow is blown out after being guided by the air outlet housing 201, the outer blade 205 and the first occupant's hand gesture 206. Regardless of whether the initial direction of the airflow is the fully open airflow direction or the lower limit airflow direction, as the first occupant's hand gesture 206 moves away from the air outlet parallel to the outer blade 205, the final direction of the air outlet is parallel to the direction of the upper housing 2011, the lower housing 2012 and the outer blade 205. When the second occupant controls the air outlet with a hand gesture 207, that is, when the palm is parallel to the plane 2031 of the lower decorative part 203 of the air outlet, the upper decorative part 204 of the air outlet has no air guiding effect. The airflow is first guided by the air outlet housing 201 and the outer blades 205, and then blown out after being guided by the lower decorative part 203 of the air outlet and the second occupant's hand gesture 207. Regardless of whether the initial direction of the airflow is the fully open airflow direction or the lower limit airflow direction, as the second occupant's hand gesture 207 moves away from the air outlet parallel to the plane of the lower decorative part 203 of the air outlet, the final direction of the air outlet is parallel to the plane of the lower decorative part 203 of the air outlet.

[0033] The working principle of this embodiment is as follows: By cleverly utilizing the Coanda effect, the airflow direction can be adjusted via gestures. The Coanda effect refers to the phenomenon that high-speed airflow along an object's surface can adhere to the surface at a corner. When the airflow from the vent forms a small angle with the surface at the corner, airflow adhesion occurs. As the angle increases, the airflow detaches from the adhesion and flows normally. In this invention, the airflow angle between the vent and the upper decorative element 204 is large enough to overcome the Coanda effect and prevent adhesion. The airflow angle between the vent and the lower decorative element 203 is also special, creating a critical state for the Coanda effect. By changing the occupant's gestures, the Coanda effect can be artificially interfered with, and the Coanda effect can be maintained or prevented using the vent feature 202. When the Coanda effect occurs, the airflow blows downwards to its lowest limit; when the Coanda effect fails, the airflow blows in the fully open direction.

[0034] Now combined Figure 6 The control method logic in this embodiment is described in detail below: First, when passengers need the air conditioning to blow air onto their faces, turn on the air conditioning: If the passenger needs airflow to their face and feels that the airflow is blowing on their face, no operation or control is required. If a passenger needs airflow to their face but feels that the airflow is blowing on their waist area, the passenger should place their hand near the outer blade 205, that is, with the first passenger's hand gesture 206, and place their hand near the outer blade 205, with the fingertip within 5 cm of the air outlet, and the angle between the direction of the finger and the direction of the air outlet controlled between -10° and 10°, for more than 1 second, and then move away from the air outlet parallel to the direction of the outer blade 205, so that the direction of the airflow is adjusted to blow on the face area. If the passenger needs airflow to the waist area and feels that the airflow is blowing on the waist area, no operation or control is required. If a passenger needs airflow to their waist but feels that the airflow is blowing towards their face, the passenger should place their hand near the outer blade 205, i.e., use the second passenger gesture 207 to place their hand near the outer blade 205, with the fingertip within 5 cm of the air outlet, and the angle between the finger direction and the air outlet direction controlled between 30° and 80°, and hold the hand for more than 1 second. Then, move the hand away from the air outlet in a direction parallel to the lower trim piece 203, and the airflow direction will be adjusted to blow towards the waist area.

[0035] If the passenger has no need for the air to blow on their face or waist, simply adjust the left and right blades to their left and right limits to avoid the waist and face areas.

[0036] To achieve the above functions, the parallel extension direction of the outer blade 205 is required to be the designed full-open air outlet direction, and the parallel extension direction of the plane 2031 of the lower decorative part 203 of the air outlet is required to be the designed lower limit air outlet direction, so as to meet the user's usage needs of full-open air outlet to the face and lower limit air outlet to the waist.

[0037] Now combined Figure 7 and Figure 8 The design methodology of this automotive air vent system is explained: S201: Initially determine the values ​​of the first included angle α1, the second included angle α2, the third included angle α3, the length d1, and the spacing d2, and combine them with the surrounding data of the air outlet, which includes the inner surface data of the occupant model, dashboard, door panel, carpet, and sunroof; the air outlet system is a complete closed domain; S202: Import complete data from the air outlet system into STARCCM+ software to build a CFD analysis model. S2021: Create the geometric model of the air outlet flow field computational domain; S2022: Divide the computational domain into a mesh and set the occupant gestures to an overlapping mesh; S2023: The flow field is simulated using the Realizable K-Epsilon turbulence model, where the governing equations are discretized using the finite volume method. In the discretized equations, the momentum equation and the turbulent diffusion equation are both discretized using the second-order difference scheme. S203: Based on the simulation analysis of the flow field, determine whether the occupant's hand gestures are effective in controlling the airflow direction. If ineffective, proceed to step S204; if effective, proceed to step S205. S204: Reset the first included angle α1, the second included angle α2, the third included angle α3, the length d1, and the spacing d2 to generate the air outlet and surrounding data; and repeat steps S201 to S203. S205: Output the first included angle α1, the second included angle α2, the third included angle α3, the length d1, and the spacing d2, which are the final design parameters.

[0038] In this embodiment, the setting parameter index in step S203 is whether the airflow direction covers and is consistent with the fully open airflow direction and the lower limit airflow direction.

[0039] In this embodiment, if the air outlet direction is never attracted by the decorative part 204 on the air outlet in the calculation results, the first included angle α1 does not need to be adjusted. If there is an attraction, the first included angle α1 needs to be reduced.

[0040] In this embodiment, if the air outlet direction is not attracted by the lower decorative part 203 in the calculation results, it can be improved by reducing the second included angle α2 and reducing the length d1.

[0041] In this embodiment, if the air outlet direction is always attracted by the lower decorative part 203 in the calculation results, it can be improved by increasing the second included angle α2 or increasing the length d1 and the distance d2.

[0042] In this embodiment, the design method of the car air vent system is actually an air vent air direction adjustment verification method, the purpose of which is to prevent air direction adjustment failure.

[0043] In this embodiment, a car uses the car air vent system as described in this embodiment.

[0044] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A car air vent system, characterized in that: It includes an air vent housing (201), an upper air vent decorative piece (204), a lower air vent decorative piece (203), an air vent feature piece (202), and an outer blade (205); The air outlet housing (201) is installed at the air outlet position; The air vent housing (201) includes an upper housing (2011) and a lower housing (2012). The upper air vent decorative piece (204) is connected to the air outlet end of the upper housing (2011). The air vent feature piece (202) is connected to the air outlet end of the lower housing (2012). The lower air vent decorative piece (203) is connected to the air vent feature piece (202). The outer blade (205) is located in the middle of the upper housing (2011) and the lower housing (2012) and is parallel to the upper housing (2011) and the lower housing (2012). The angle between the decorative part (204) on the air vent and the upper shell (2011) and the upper shell (2011) is denoted as the first included angle α1, and α1≥55°; The included angle between the plane (2031) of the lower decorative part (203) of the air vent and the lower shell (2012) is denoted as the second included angle α2, and 25°≤α2≤30°; The angle between the windward side (2021) of the air vent feature (202) and the lower shell (2012) is denoted as the third included angle α3, and 135°≤α3≤140°; The length of the windward side (2021) of the air vent feature (202) is d1, and 2.5mm≤d1≤3mm; The leeward side (2022) of the air vent feature (202) is parallel to the plane (2031) on the lower decorative part (203) of the air vent, and the leeward side (2022) protrudes from the plane (2031). The method for confirming the location of the air vent is as follows: Determine the seating reference point, namely R point (101), based on the overall vehicle layout. R point (101) is the hip point when the seat is adjusted to the last and lowest position. Based on point R (101), the lower limit blowing point (102) and the fully open blowing point (103) are determined as follows: the point located directly above point R (101) and at a Z-direction height of H0 from point R is recorded as the lower limit blowing point (102), and the point located directly above the lower limit blowing point (102) and at a Z-direction height of H1 from the lower limit blowing point (102) is recorded as the fully open blowing point (103); wherein, the lower limit blowing point (102) is the waist of the simulated dummy arranged in the vehicle; the fully open blowing point (103) is the breathing port area of ​​the simulated dummy arranged in the vehicle; the location of the air outlet is determined as follows: Point P, which is L1 in the X direction and H2 in the Z direction from point R (101), is designated as air outlet (104). Calculate the angle A1 between the fully open air outlet direction and the lower limit air outlet direction, and determine whether A1 satisfies: 25°≤A1≤30°. If it satisfies, then point P is the air outlet (104). If it does not satisfy, adjust H2 and L1, redetermine point P, and calculate the value of A1 until A1 satisfies: 25°≤A1≤30°. Wherein, the fully open air outlet direction is the direction of the line connecting the air outlet (104) to the fully open blowing point (103); the lower limit air outlet direction is the direction of the line connecting the air outlet (104) to the lower limit blowing point (102).

2. The automotive air vent system according to claim 1, characterized in that: The absolute value of the difference between the second included angle α2 and the included angle A1 between the fully open air outlet direction and the lower limit air outlet direction is less than or equal to 2°.

3. The automotive air vent system according to claim 1, characterized in that: The distance d2 from the leeward side (2022) of the air vent feature (202) to the plane (2031) is between 0.4mm and 0.6mm.

4. The automotive air vent system according to claim 1, characterized in that: The parallel extension of the outer blade (205) is in the designed fully open air outlet direction.

5. The automotive air vent system according to claim 1, characterized in that: The parallel extension of the plane (2031) of the lower decorative part (203) of the air vent is the designed lower limit air outlet direction.

6. The automotive air vent system according to claim 1, characterized in that: The formula for calculating the angle A1 between the fully open air outlet direction and the lower limit air outlet direction is as follows: A1=arctan((H1-H2+H0) / L1)+arctan((H2-H0) / L1).

7. The automotive air vent system according to claim 1, characterized in that: The value of H0 is 100mm to 150mm; the value of H1 is 450mm to 550mm.

8. A control method for an automotive air vent system, characterized in that: The control method of the automotive air vent system as described in any one of claims 1 to 7 includes: When there is no first control component or second control component outside the air outlet, the upper decorative component (204) and lower decorative component (203) of the air outlet have no air guiding effect. The airflow is blown out after being guided by the air outlet housing (201) and the outer blade (205). Its air outlet direction is parallel to the direction of the upper housing (2011), the lower housing (2012) and the outer blade (205). Among them, the first control component has an air guiding surface that is parallel to the outer blade (205), and the second control component has an air guiding surface that is parallel to the plane of the lower decorative component (203). When the air outlet is controlled by the first control component, the upper decorative part (204) and lower decorative part (203) of the air outlet have no air guiding effect. The airflow is blown out after being guided by the air outlet housing (201), the outer blade (205) and the first control component. As the first control component moves away from the air outlet parallel to the outer blade (205), the final air outlet direction is parallel to the direction of the upper housing (2011), the lower housing (2012) and the outer blade (205). When the air outlet is controlled by a second control component, the upper decorative component (204) of the air outlet has no air guiding effect. The airflow is first guided by the air outlet housing (201) and the outer blade (205), and then blown out after being guided by the lower decorative component (203) and the second control component. As the second control component moves away from the air outlet parallel to the plane of the lower decorative component (203), the final air outlet direction is parallel to the plane of the lower decorative component (203).

9. A car, characterized in that: The vehicle air vent system as described in any one of claims 1 to 7 is adopted.

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