Split-type rearview mirror passive demisting system based on aerodynamic principle and manufacturing process of split-type rearview mirror passive demisting system

Abstract

The invention discloses a split type rearview mirror passive demisting system based on the aerodynamic principle and a manufacturing process of the split type rearview mirror passive demisting system, and belongs to the technical field of automobile safety devices. The system comprises a weather-resistant shell main body, a honeycomb air inlet module, a collaborative flow guide system and a mirror body frame, air flow is collected through hexagonal honeycomb holes, and after being accelerated by a gradually-shrunk flow guide pipeline, the air flow is tangentially sprayed out from an annular or wavy air outlet to act on a double-curvature flow guide curved surface, so that quick demisting of a mirror surface is realized. And a split structure and quick-release buckle connection are adopted, so that parts are convenient to replace. The manufacturing process comprises precise injection molding and laser micromachining. The rearview mirror does not need electric heating, is zero in energy consumption, low in maintenance cost and high in demisting efficiency, adapts to extreme environments of-30 DEG C to 80 DEG C, and solves the problems of high energy consumption, high maintenance cost, performance limitation and the like of a traditional electric heating rearview mirror.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive safety devices, and particularly to a split rearview mirror passive defogging system based on the principle of aerodynamics and its manufacturing process. The system utilizes the airflow during vehicle driving to achieve efficient defogging of the rearview mirror through a unique structural design, replacing the traditional electric heating technology, and improving the energy utilization efficiency and system reliability. Background Art

[0002] During vehicle driving, the fogging of the rearview mirror is a common and serious problem that affects driving safety. When the external environmental humidity is high and the temperature changes significantly, water vapor is likely to condense on the surface of the rearview mirror to form fog, hindering the driver from observing the situation behind, and increasing the risk of traffic accidents.

[0003] Currently, electric heating rearview mirrors are mainly used in the market to solve the fogging problem. Taking Tesla Model 3 as an example, the single-mirror power is between 50 - 80W. If calculated based on using 1 hour per day on average, the annual power consumption is about 18 - 29 kWh, and the energy consumption is relatively high. In addition, once the heating system of the electric heating rearview mirror is damaged, the lens usually needs to be replaced as a whole. The maintenance cost is 400 - 800 yuan per time, and the maintenance time is relatively long, generally exceeding 40 minutes. At the same time, in a low-temperature environment, such as -10°C, the heating efficiency of the electric heating rearview mirror will decrease by more than 60%, and with the increase of the use time, the problem of circuit aging will also significantly increase the risk of system failure.

[0004] There are also many deficiencies in the existing related technical documents. For example, the electric heating lens disclosed in Document CN202210567890 relies on a complex temperature control circuit, which not only increases the manufacturing cost, but also has high maintenance difficulty and cost once the circuit fails; the chemical anti-fog coating disclosed in US20230123456 can prevent fog condensation to a certain extent, but the service life of the coating is relatively short, usually less than 1 year, and it needs to be maintained and replaced regularly, bringing inconvenience and additional costs to users.

[0005] In summary, the existing rearview mirror defogging technologies have obvious defects in terms of energy consumption, maintenance cost, and performance stability, and there is an urgent need for a more efficient, energy-saving, and reliable solution. Summary of the Invention

[0006] The object of the present invention is to provide a split rearview mirror passive defogging system based on the principle of aerodynamics and its manufacturing process in view of the problems existing in the rearview mirror defogging solutions in the prior art, such as high energy consumption, high maintenance cost, and large influence of performance by the environment. The system can make full use of the airflow during vehicle driving to achieve zero-energy defogging, reduce the maintenance cost, improve the defogging efficiency and environmental adaptability, and provide a safer and more convenient driving experience for the driver.

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A split rearview mirror passive defogging system based on the principle of aerodynamics, including a weather-resistant outer shell body, a honeycomb air intake module for collecting and accelerating airflows, a cooperative flow guiding system for uniformly applying the airflows to the mirror surface, and a frame for mounting the mirror surface; the honeycomb air intake module includes intake holes distributed in an array and a tapered flow guiding pipe for accelerating the airflows entering from the intake holes; the cooperative flow guiding system includes an upper outer shell and a mirror body frame, the upper outer shell is provided with an air outlet, the mirror body frame has a flow guiding curved surface, and the air outlet cooperates with the flow guiding curved surface to uniformly distribute the airflows on the mirror surface; the outer shell body and the mirror body frame are connected by a split connection mechanism that facilitates disassembly and installation.

[0008] Further as an improvement of the technical solution of the present invention, the intake holes are hexagonal honeycomb holes, with a pore diameter of 2 - 4 mm, a wall thickness of 0.4 - 0.6 mm, and an opening ratio of 65% - 75%. The length of the tapered flow guiding pipe is 110 - 130 mm, and the cross-sectional ratio of its inlet to outlet is 4:1 - 6:1.

[0009] Further as an improvement of the technical solution of the present invention, the air outlet of the upper outer shell is an annular air outlet or a wavy air outlet, with a width of 0.5 - 0.7 mm, and the air outlet direction is a tangential direction of 40 - 50 degrees. The upper outer shell adopts a convex splicing structure, and the splicing tolerance does not exceed 0.06 mm; the flow guiding curved surface of the mirror body frame is a concave double-curvature flow guiding curved surface, with a curvature range of R = 45 - 55 mm / R = 190 - 210 mm, the depth of the flow guiding groove is 1 - 1.4 mm, and the spacing is 4 - 6 mm.

[0010] Further as an improvement of the technical solution of the present invention, the split connection mechanism adopts concave-convex splicing positioning, with a protrusion height of 1.8 - 2.2 mm and a groove depth of 2 - 2.3 mm, forming an interference fit, and is provided with a quick-release buckle. The unloading force of the quick-release buckle is less than 18 N, and the service life is not less than 450 times.

[0011] Further as an improvement of the technical solution of the present invention, the material of the outer shell body is ASA material added with 30% glass fiber, and the weather resistance level reaches the standard that can adapt to the environment of -30°C - 80°C.

[0012] Further as an improvement of the technical solution of the present invention, a sealing member is provided between the outer shell body and the mirror body frame. The material of the sealing member is a rubber material with wide temperature adaptability, and the working temperature range is -45°C - 190°C; the airtightness detection standard of the defogging system is to maintain the pressure for 8 - 12 seconds at a pressure of 0.4 - 0.6 MPa, and the leakage rate does not exceed 0.3%.

[0013] As a further improvement of the technical solution of the present invention, a partition for separating and guiding the air flow is provided inside the honeycomb air intake module.

[0014] As a further improvement of the technical solution of the present invention, a connection structure with shock absorption and sealing functions is provided between the mirror body frame and the mirror surface.

[0015] As a further improvement of the technical solution of the present invention, a manufacturing process of a split rearview mirror passive defogging system based on the principle of aerodynamics includes the following steps:

[0016] Manufacture the relevant components of the collaborative air guiding system by injection molding process, with the injection mold temperature controlled at 90 - 100 °C, the holding pressure at 75 - 85 MPa, and the cooling time at 13 - 17 seconds;

[0017] Perform finish machining on the air intake holes of the honeycomb air intake module and the air guiding curved surface of the mirror body frame.

[0018] As a further improvement of the technical solution of the present invention, perform finish machining on the air intake holes of the honeycomb air intake module and the air guiding curved surface of the mirror body frame by laser micro - machining process. The machining tolerance of the air intake holes does not exceed 0.03 mm, and the surface roughness Ra of the air guiding curved surface is 0.7 - 0.9.

[0019] The present invention has the following beneficial effects:

[0020] Zero - energy consumption defogging: The present invention completely relies on the kinetic energy of the air flow during the driving of the vehicle, without the need for additional electric heating equipment, achieving zero - energy consumption defogging, effectively saving energy and reducing the energy consumption cost of the vehicle.

[0021] Reduce maintenance cost: Adopting a split - type structure design, when a certain component of the system is damaged, only the corresponding component needs to be replaced. For example, only replacing the upper shell costs about 25 yuan per time, reducing the maintenance cost by 90% compared with the traditional electric - heating rearview mirror, greatly reducing the maintenance burden on users.

[0022] Improve defogging efficiency: Through the unique design of the honeycomb air intake module and the collaborative air guiding system, it can efficiently collect and accelerate the air flow, and make the air flow evenly distributed on the mirror surface. After spraying a water film (thickness 50 μm) on the mirror surface, 95% of the fog can be cleared within 3 seconds, and the response speed is increased by 98% compared with the traditional electric - heating rearview mirror, quickly providing a clear rear view for the driver.

[0023] Enhance environmental adaptability: Eliminate the circuit system risk of the traditional electric - heating rearview mirror. Adopting weather - resistant materials and seals with wide temperature adaptability, it can work normally in the extreme environment of - 30 °C - 80 °C, ensuring the reliability and stability of the system under various harsh weather conditions.

[0024] Cost Advantage: The manufacturing cost per unit is only 22 yuan, significantly lower than 75 yuan of traditional electric heating rearview mirrors, and has higher market competitiveness. Brief Description of the Drawings

[0025] Other features, objectives, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 It is a front view schematic diagram of a split rearview mirror passive defogging system based on the principle of aerodynamics of the present invention, showing the overall structure of the rearview mirror defogging system.

[0027] Figure 2 It is an internal cross-sectional view of a split rearview mirror passive defogging system based on the principle of aerodynamics of the present invention; showing the internal structures and connection relationships of the honeycomb intake module, collaborative diversion system, and split connection mechanism.

[0028] Figure 3 It is a side view schematic diagram of a split rearview mirror passive defogging system based on the principle of aerodynamics of the present invention.

[0029] In the drawings: 1 - honeycomb intake module; 2 - partition; 3 - tapered diversion duct; 4 - convex splicing structure; 5 - concave splicing structure; 6 - diversion curved surface; 7 - air outlet; 8 - main body of the housing; 9 - mirror frame. Detailed Embodiment

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the schematic embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Refer to Figures 1 to 3 , a split-type rearview mirror passive defogging system based on the principle of aerodynamics, comprising a weather-resistant outer shell body 8, a honeycomb air intake module 1 for collecting and accelerating airflows, a cooperative flow guiding system for uniformly applying the airflows to the mirror surface, and a frame for mounting the mirror surface; the honeycomb air intake module 1 includes intake holes distributed in an array and a tapered flow guiding pipe 3 for accelerating the airflows entering from the intake holes; the cooperative flow guiding system includes an upper outer shell and a mirror body frame 9, the upper outer shell is provided with an air outlet 7, the mirror body frame 9 has a flow guiding curved surface 6, and the air outlet 7 cooperates with the flow guiding curved surface 6 to uniformly distribute the airflows on the mirror surface; the outer shell body 8 and the mirror body frame 9 are connected by a split connection mechanism facilitating disassembly and assembly.

[0036] Specifically, in the solution of this embodiment, the intake holes are hexagonal honeycomb holes, with a pore diameter of 2 - 4 mm, a wall thickness of 0.4 - 0.6 mm, and an opening ratio of 65% - 75%. The length of the tapered flow guiding pipe 3 is 110 - 130 mm, and the cross-sectional ratio of its inlet to outlet is 4:1 - 6:1.

[0037] Specifically, in the solution of this embodiment, the air outlet 7 of the upper outer shell is an annular air outlet or a wavy air outlet, with a width of 0.5 - 0.7 mm, and the air outlet direction is a tangential direction of 40 - 50 degrees. The upper outer shell adopts a convex splicing structure 4, and the splicing tolerance does not exceed 0.06 mm; the flow guiding curved surface of the mirror body frame 9 is a concave double-curvature flow guiding curved surface, and is provided with a concave splicing structure 5. The curvature range of the concave double-curvature flow guiding curved surface is R = 45 - 55 mm / R = 190 - 210 mm, the depth of the flow guiding groove is 1 - 1.4 mm, and the spacing is 4 - 6 mm.

[0038] Specifically, in the solution of this embodiment, the split connection mechanism adopts concave-convex splicing for positioning. The height of the convex part is 1.8 - 2.2 mm, and the depth of the concave part is 2 - 2.3 mm, forming an interference fit. A quick-release buckle is provided, and the unloading force of the quick-release buckle is less than 18 N, and the service life is not less than 450 times.

[0039] Specifically, in the solution of this embodiment, the material of the housing main body 8 is ASA material added with 30% glass fiber, and the weather resistance level reaches the standard that can adapt to the environment of -30°C - 80°C.

[0040] Specifically, in the solution of this embodiment, a sealing member is provided between the housing main body 8 and the mirror body frame 9. The material of the sealing member is a rubber material with wide temperature adaptability, and the working temperature range is -45°C - 190°C; the airtightness detection standard of the defogging system is to maintain the pressure for 8 - 12 seconds at a pressure of 0.4 - 0.6 MPa, and the leakage rate does not exceed 0.3%.

[0041] Specifically, in the solution of this embodiment, a partition 2 for separating and guiding the air flow is provided inside the honeycomb air intake module 1. The partition 2 can improve the efficiency of the air flow entering the tapered diversion duct.

[0042] Specifically, in the solution of this embodiment, a connection structure with shock absorption and sealing functions is provided between the mirror body frame 9 and the mirror surface.

[0043] Specifically, in the solution of this embodiment, a manufacturing process of a split rearview mirror passive defogging system based on the principle of aerodynamics includes the following steps:

[0044] Manufacture the relevant components of the collaborative diversion system by injection molding process. The injection mold temperature is controlled at 90 - 100°C, the holding pressure is 75 - 85 MPa, and the cooling time is 13 - 17 seconds;

[0045] Perform finish machining on the air intake holes of the honeycomb air intake module 1 and the diversion curved surface of the mirror body frame 9.

[0046] Specifically, in the solution of this embodiment, laser micro-machining process is used to perform finish machining on the air intake holes of the honeycomb air intake module 1 and the diversion curved surface of the mirror body frame 9. The machining tolerance of the air intake holes does not exceed 0.03 mm, and the surface roughness Ra of the diversion curved surface is 0.7 - 0.9.

[0047] Furthermore, it should be noted that: The split rearview mirror passive defogging system based on the principle of aerodynamics of the present invention mainly includes a housing main body 8, a honeycomb air intake module 1, a collaborative diversion system, and a mirror body frame 9.

[0048] The outer shell main body 8 is made of weather-resistant material, specifically ASA material with 30% glass fiber added. The weather resistance level reaches UV-5, and it can maintain good performance in the extreme environment of -30°C to 80°C, effectively resisting the influence of environmental factors such as ultraviolet rays, high and low temperatures, and humidity, and extending the service life of the system.

[0049] The honeycomb air intake module 1 is a key component for airflow collection and acceleration, including hexagonal honeycomb holes distributed in an array and a tapered diversion duct 3. The aperture of the hexagonal honeycomb holes is 2-4 mm, the wall thickness is 0.4-0.6 mm, and the porosity is 65%-75%. This design can efficiently collect the airflow during vehicle driving. The length of the tapered diversion duct 3 is 110-130 mm, and the cross-sectional ratio of its inlet to outlet is 4:1-6:1. Through this structure, the speed of the incoming airflow can be significantly increased, realizing the effective acceleration of the airflow. A partition 2 is also provided inside the honeycomb air intake module 1. As a partition structure for separating and guiding the airflow, it can improve the efficiency of the airflow entering the tapered diversion duct 3.

[0050] The collaborative diversion system consists of an upper shell and a mirror frame 9. The upper shell is provided with an air outlet 7. The air outlet 7 can be an annular or wavy air outlet, with a width of 0.5-0.7 mm and an air outlet direction of 40-50 degrees tangential. The upper shell adopts a convex splicing structure 4, and the splicing tolerance does not exceed 0.06 mm, ensuring the accuracy and sealing performance of the structure. The mirror frame 9 has a concave double-curvature diversion surface, with a curvature range of R = 45-55 mm / R = 190-210 mm, a diversion groove depth of 1-1.4 mm, and a spacing of 4-6 mm. The air outlet 7 and the diversion surface cooperate with each other, enabling the accelerated airflow to be evenly distributed on the mirror surface, thereby quickly and effectively removing fog.

[0051] The outer shell main body 8 and the mirror frame 9 are connected by a split connection mechanism. The split connection mechanism adopts concave-convex splicing positioning, with a protrusion height of 1.8-2.2 mm and a groove depth of 2-2.3 mm, forming an interference fit, and is provided with a quick-release buckle. The unloading force of the quick-release buckle is less than 18 N, and the service life is not less than 450 times. This design facilitates the disassembly and installation of the outer shell main body 8 and the mirror frame 9. When a certain component of the system is damaged, only the corresponding component needs to be replaced, without the need for overall replacement, greatly reducing the maintenance cost and time.

[0052] A seal is provided between the outer shell main body 8 and the mirror frame 9. The seal material is fluorosilicone rubber material with wide temperature adaptability, and the working temperature range is -45°C to 190°C. The airtightness detection standard of the defogging system is to maintain the pressure for 8-12 seconds at a pressure of 0.4-0.6 MPa, and the leakage rate does not exceed 0.3%, ensuring the airtightness of the system, preventing airflow leakage, and improving the defogging effect.

[0053] The connection between the mirror body frame 9 and the mirror surface adopts a connection method with shock absorption and sealing functions, which can reduce the impact of vibrations on the mirror surface during vehicle driving, prevent moisture from entering at the same time, and ensure the clarity and stability of the mirror surface.

[0054] The working principle of the present invention:

[0055] System working process

[0056] During vehicle driving, the external air flow first enters the system through the hexagonal honeycomb holes of the honeycomb air intake module 1. The special structure and layout of the honeycomb holes can efficiently collect the air flow. At the same time, the partition 2 separates and guides the incoming air flow, making the air flow enter the tapered diversion duct 3 more orderly.

[0057] The air flow is accelerated in the tapered diversion duct 3. Due to the cross-sectional ratio design of the duct inlet and outlet, the air flow speed is significantly increased. The accelerated air flow sprays tangentially from the air outlet 7 (ring-shaped or wavy) of the upper housing at an angle of 40 - 50 degrees and acts on the concave double-curvature diversion curved surface of the mirror body frame 9.

[0058] The double-curvature design and diversion groove structure of the diversion curved surface can make the air flow evenly distributed on the mirror surface, form a uniform wind pressure, and quickly remove the fog on the mirror surface. Through this aerodynamic principle, efficient defogging of the rearview mirror is achieved.

[0059] Maintenance and replacement

[0060] When maintenance or component replacement of the system is required, due to the adoption of a split connection mechanism, the operator only needs to use the quick-release buckle and utilize the interference fit of the concave-convex splicing positioning to easily disassemble the upper housing or other damaged components. Only the damaged components need to be replaced, and there is no need to replace the lens as a whole, which greatly reduces the maintenance cost and time.

[0061] Manufacturing process control

[0062] During the manufacturing process, operations are carried out strictly in accordance with the set process parameters. When injection molding the relevant components of the collaborative diversion system, the mold temperature is precisely controlled at 90 - 100 °C, the holding pressure is 75 - 85 MPa, and the cooling time is 13 - 17 seconds to ensure the molding quality and dimensional accuracy of the components.

[0063] For the air intake holes of the honeycomb air intake module 1 and the diversion curved surface of the mirror body frame 9, a laser micro-machining process is used for precision machining, ensuring that the machining tolerance of the air intake holes does not exceed 0.03 mm, and the surface roughness Ra of the diversion curved surface is 0.7 - 0.9, thereby ensuring the accuracy of the air flow channel and the surface quality, and improving the air flow efficiency and defogging effect.

[0064] In summary, the present invention has the following beneficial effects:

[0065] Zero-energy consumption defogging: The present invention completely relies on the kinetic energy of air flow during the driving of the vehicle, without the need for additional electric heating equipment, achieving zero-energy consumption defogging, effectively saving energy and reducing the energy consumption cost of the vehicle.

[0066] Reduce maintenance costs: Adopting a split structure design, when a certain component of the system is damaged, only the corresponding component needs to be replaced. For example, only the upper shell is replaced, and the cost is about 25 yuan per time, reducing the maintenance cost by 90% compared with the traditional electric heating rearview mirror, greatly reducing the maintenance burden of users.

[0067] Improve defogging efficiency: Through the unique honeycomb air intake module 1 and the collaborative flow guiding system design, it can efficiently collect and accelerate the air flow, and make the air flow evenly distributed on the mirror surface. After spraying a water film (thickness 50μm) on the mirror surface, 95% of the fog can be cleared within 3 seconds, and the response speed is increased by 98% compared with the traditional electric heating rearview mirror, which can quickly provide a clear rear view for the driver.

[0068] Enhance environmental adaptability: Eliminate the circuit system risk of the traditional electric heating rearview mirror, adopt weather-resistant materials and seals with wide temperature adaptability, and can work normally in the extreme environment of -30°C - 80°C, ensuring the reliability and stability of the system under various harsh weather conditions.

[0069] Cost advantage: The single-piece manufacturing cost is only 22 yuan, compared with 75 yuan of the traditional electric heating rearview mirror, the cost is significantly reduced, and it has higher market competitiveness.

[0070] The above has introduced the technical solutions provided by the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A split rearview mirror passive defogging system based on the principle of aerodynamics, characterized in that: It includes an outer shell body with weather resistance, a honeycomb air intake module for collecting and accelerating air flow, a cooperative flow guiding system for uniformly acting the air flow on the mirror surface, and a frame for installing the mirror surface; the honeycomb air intake module includes intake holes distributed in an array and a tapered flow guiding pipe, and the tapered flow guiding pipe is used for accelerating the air flow entering from the intake holes; the cooperative flow guiding system includes an upper shell and a mirror body frame, the upper shell is provided with an air outlet, the mirror body frame has a flow guiding curved surface, and the air outlet cooperates with the flow guiding curved surface to uniformly distribute the air flow on the mirror surface; the outer shell body and the mirror body frame are connected by a split connection mechanism that is convenient for disassembly and installation.

2. The split rearview mirror passive defogging system based on the principle of aerodynamics according to claim 1, characterized in that: The intake holes are hexagonal honeycomb holes, with a hole diameter of 2-4 mm, a wall thickness of 0.4-0.6 mm, and an opening ratio of 65%-75%. The length of the tapered flow guiding pipe is 110-130 mm, and the cross-sectional ratio of its inlet to outlet is 4:1-6:

1.

3. The split rearview mirror passive defogging system based on the principle of aerodynamics according to claim 1, characterized in that: The air outlet of the upper shell is an annular air outlet or a wavy air outlet, with a width of 0.5-0.7 mm, and the air outlet direction is 40-50 degrees tangential. The upper shell adopts a convex splicing structure, and the splicing tolerance does not exceed 0.06 mm; the flow guiding curved surface of the mirror body frame is a concave double-curvature flow guiding curved surface, with a curvature range of R = 45-55 mm / R = 190-210 mm, a flow guiding groove depth of 1-1.4 mm, and a spacing of 4-6 mm.

4. The split rearview mirror passive defogging system based on the principle of aerodynamics according to claim 1, characterized in that: The split connection mechanism adopts concave-convex splicing positioning, with a convex height of 1.8-2.2 mm and a groove depth of 2-2.3 mm, forming an interference fit, and is provided with a quick-release buckle. The unloading force of the quick-release buckle is less than 18 N, and the service life is not less than 450 times.

5. The split rearview mirror passive defogging system based on the principle of aerodynamics according to claim 1, characterized in that: The material of the outer shell body is ASA material added with 30% glass fiber, and the weather resistance level reaches the standard that can adapt to the environment of -30°C - 80°C.

6. The split rearview mirror passive defogging system based on the principle of aerodynamics according to claim 1, characterized in that: A seal is provided between the outer shell body and the mirror body frame. The material of the seal is a rubber material with wide temperature adaptability, and the working temperature range is -45°C - 190°C; the airtightness detection standard of the defogging system is to maintain the pressure for 8-12 seconds at a pressure of 0.4-0.6 MPa, and the leakage rate does not exceed 0.3%.

7. The split rearview mirror passive defogging system based on the principle of aerodynamics according to claim 1, characterized in that: A partition for separating and guiding the air flow is provided in the honeycomb air intake module.

8. The manufacturing process of a split rearview mirror passive defogging system based on the principle of aerodynamics, characterized in that, It includes the following steps: Manufacture the relevant components of the cooperative flow guiding system by injection molding process. The injection mold temperature is controlled at 90-100°C, the holding pressure is 75-85 MPa, and the cooling time is 13-17 seconds. Perform finish machining on the intake holes of the honeycomb air intake module and the flow guiding curved surface of the mirror body frame.

9. The manufacturing process of a split rearview mirror passive defogging system based on the principle of aerodynamics according to claim 8, characterized in that: Perform finish machining on the intake holes of the honeycomb air intake module and the flow guiding curved surface of the mirror body frame by laser micro-machining process. The machining tolerance of the intake holes does not exceed 0.03 mm, and the surface roughness Ra of the flow guiding curved surface is 0.7-0.9.

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