Rearview mirror with function of automatically removing water mist from mirror surface

Abstract

The invention relates to the technical field of rearview mirror demisting, in particular to a rearview mirror with an automatic mirror surface water mist removal function, which comprises a rearview mirror main body, an airflow frame, a miniature fan and a control unit, the rearview mirror main body is provided with a lens, and a heater and a temperature and humidity sensor which are positioned on the back surface of the lens; a plurality of gas spraying holes are formed in the gas flow frame in the circumferential direction and are used for guiding heated gas to the lens; the miniature fan is integrated at an air inlet of the air injection hole, and air flow is formed in the air injection hole; the control unit is connected with the heater and the temperature and humidity sensor and used for dynamically adjusting the heating power of the heater and the air flow intensity in the air spraying hole according to the feedback result of the temperature and humidity sensor. The air flow auxiliary function is introduced, evaporation and diffusion of water mist are accelerated, the demisting efficiency is improved, meanwhile, dynamic adjustment of the heating power and the air flow intensity is achieved through the temperature and humidity sensor and the control unit, and the efficient demisting effect can be kept even in the extremely cold or high-humidity environment.

Description

Technical Field

[0001] The invention relates to the technical field of rearview mirror defogging, and in particular to a rearview mirror with an automatic mirror defogging function. Background Art

[0002] In the wet and rainy season, defogger of the rearview mirror becomes particularly important. When the rainfall is heavy, a layer of water mist is easily condensed on the surface of the rearview mirror, which seriously affects the driver's vision clarity and increases the potential safety hazard during driving. Especially when turning, changing lanes or reversing, the blurred vision may lead to misjudgment and cause traffic accidents. Therefore, ensuring that the rearview mirror is clear and fog-free is an indispensable part of ensuring driving safety.

[0003] The existing heated defogger structure installs a heating module inside the rearview mirror, which increases the temperature of the lens to evaporate the mist. However, the heating process takes a certain amount of time to completely clear the mist, and the defogger efficiency is low. In addition, the heating effect is limited in extremely cold or humid environments. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a rearview mirror with an automatic mirror demisting function, which effectively solves the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a rearview mirror with automatic mirror defogging function, comprising: A rearview mirror body, comprising a lens and a heater and a temperature and humidity sensor located on the back of the lens; An airflow frame, provided with a plurality of air jet holes along the circumferential direction, for guiding the gas heated by the heater in the rearview mirror body to the lens; A micro fan, integrated at the air inlet of the jet hole, to form an air flow in the jet hole; A control unit is connected to the heater and the temperature and humidity sensor, and is used to dynamically adjust the heating power of the heater and the airflow intensity in the air jet hole according to the feedback result of the temperature and humidity sensor.

[0006] Furthermore, the air jet hole comprises a drainage section and an injection section, the drainage section is perpendicular to the lens, and the injection section and the drainage section are arranged at a certain angle.

[0007] Furthermore, the injection section is arranged to be inclined toward the lens so as to directly spray the heated gas onto the lens.

[0008] Furthermore, the injection section is arranged along a direction parallel to the lens; The guide plate arranged at the gas outlet of the injection section indirectly guides the heated gas to the lens.

[0009] Furthermore, the injection section is arranged to be inclined in a direction away from the lens, and a guide plate arranged at the gas outlet of the injection section indirectly guides the heated gas to the lens.

[0010] Furthermore, one end of the jet hole is connected to the air outlet end of the micro fan, and the other end is inclined in a direction away from the lens, and a guide plate arranged at the air outlet position of the jet hole indirectly guides the heated gas to the lens.

[0011] Furthermore, one end of the guide plate is fixedly arranged on the outer side surface of the airflow frame, and the other end is inclined toward the direction of the lens, and forms a confluence area toward the edge of the lens at the air outlet of the air jet hole; The confluence area is divergent toward the lens.

[0012] Furthermore, one end of the guide plate fixed to the outer side of the airflow frame is provided with a rectifying plate, and the rectifying plate is arranged parallel to the lens.

[0013] Furthermore, the inner edge of the rectifying plate is bent toward the lens to extend into a plurality of guide plates corresponding to the plurality of the air jet holes, and the plurality of guide plates are deformed by heat and spliced ​​into the guide plate.

[0014] Furthermore, the gas outlets of the plurality of gas jet holes form a gas outlet annular surface; The air outlet annular surface is arranged perpendicular to the air outlet direction of the air injection hole.

[0015] The beneficial effects of the present invention are as follows: the present invention introduces an airflow auxiliary function by setting an airflow frame and a micro fan, thereby accelerating the evaporation and diffusion of water mist and significantly improving the defog efficiency. At the same time, with the help of temperature and humidity sensors and a control unit, dynamic adjustment of heating power and airflow intensity is achieved, and an efficient defog effect can be maintained even in extremely cold or high humidity environments, without the need for manual operation by the driver, further improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1Schematic diagram of the structure of a rearview mirror with automatic mirror defogging function according to an embodiment of the present invention; Figure 2 AA cross-sectional view of a rearview mirror with automatic mirror defogging function in an embodiment of the present invention; Figure 3 This is a schematic diagram of the first structure of the injection hole in an embodiment of the present invention; Figure 4 A schematic diagram of a second structure of the injection hole in an embodiment of the present invention; Figure 5 A schematic diagram of the third structure of the injection hole in the embodiment of the present invention; Figure 6 Schematic diagram of the fourth structure of the injection hole in the embodiment of the present invention; Figure 7 Schematic cross-sectional view of a rectifying plate and a guide plate in an embodiment of the present invention; Figure 8 It is an exploded schematic diagram of a rectifying plate and a guide plate on a rearview mirror in an embodiment of the present invention; Fig. 9 Schematic diagram of the structure of multiple guide vanes on a guide plate in an embodiment of the present invention.

[0018] Figure numerals: 1, rearview mirror body; 2, lens; 3, heater; 4, temperature and humidity sensor; 5, airflow frame; 51, jet hole; 51a, diversion section; 51b, injection section; 51c, air outlet annular surface; 6, micro fan; 7, guide plate; 7a, confluence area; 8, rectifier plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] like Figure 1 to Figure 2 The rearview mirror with automatic mirror demisting function shown in the figure comprises: a rearview mirror body 1, an airflow frame 5, a micro fan 6 and a control unit, wherein the rearview mirror body 1 has a lens 2 and a heater 3 and a temperature and humidity sensor 4 located on the back of the lens 2; the airflow frame 5 is provided with a plurality of jet holes 51 along the circumferential direction, which are used to guide the gas heated by the heater 3 in the rearview mirror body 1 to the lens 2; the micro fan 6 is integrated at the air inlet of the jet hole 51 to form an airflow in the jet hole 51; the control unit is connected to the heater 3 and the temperature and humidity sensor 4, and is used to dynamically adjust the heating power of the heater 3 and the airflow intensity in the jet hole 51 according to the feedback result of the temperature and humidity sensor 4.

[0023] The implementation process of the preferred embodiment of the present invention is to monitor the water mist on the mirror surface in real time through the temperature and humidity sensor 4. When water mist is detected, the heater 3 is automatically started, and the micro fan 6 is used to generate negative pressure in the airflow frame 5, sucking the heated gas and blowing it to the mirror surface to accelerate the evaporation and diffusion of the water mist; and when the water mist is completely eliminated or the environmental conditions improve, the heater 3 and the micro fan 6 are automatically turned off to achieve energy saving. In special environmental conditions, the system adopts a priority control method: in an extremely cold environment, the heater 3 is started first to ensure that the mirror temperature is higher than the dew point to prevent the formation of water mist; and in a high humidity environment, the airflow system is started first to quickly blow away the water mist to improve the demisting efficiency.

[0024] The present invention introduces an airflow auxiliary function by setting an airflow frame 5 and a micro fan 6, which accelerates the evaporation and diffusion of water mist and significantly improves the defog efficiency. At the same time, with the help of the temperature and humidity sensor 4 and the control unit, dynamic adjustment of the heating power and airflow intensity is achieved. Even in extremely cold or high humidity environments, an efficient defog effect can be maintained without the need for manual operation by the driver, further improving the user experience.

[0025] In the present invention, the air jet hole 51 includes a drainage section 51a and an injection section 51b, wherein the drainage section 51a is perpendicular to the lens 2, and the injection section 51b is arranged at a certain angle to the drainage section 51a. The drainage section 51a allows the heated gas to first enter the drainage section 51a perpendicular to the surface of the lens 2, ensuring that the airflow has sufficient speed and pressure when entering the air jet hole 51, thereby avoiding unnecessary turbulence or resistance caused by angle problems when the airflow enters the air jet hole 51, and by setting the angle of the injection section 51b, the airflow can be guided to a specific area (such as the edge or center) of the lens 2, making the airflow direction more accurate and further improving the demisting efficiency.

[0026] In a preferred embodiment, Figure 3 As shown, the spray section 51b is tilted toward the lens 2 to directly spray the heated gas onto the lens 2. By directly spraying the heated gas onto the lens 2, the heat loss during the transmission process is reduced, the surface temperature of the lens 2 is quickly increased, and the water mist evaporates quickly, thereby significantly shortening the defog time.

[0027] In another preferred embodiment, Figure 4 As shown, the injection section 51b is arranged in a direction parallel to the lens 2; the guide plate 7 arranged at the air outlet of the injection section 51b indirectly guides the heated gas to the lens 2. The injection section 51b sprays the heated gas onto the guide plate 7, and the rectification of the guide plate 7 reduces the impact of the airflow on the lens 2, so that the airflow flows to the surface of the lens 2 more stably and evenly, thereby improving the defogging efficiency.

[0028] As a preferred embodiment of the above scheme, Figure 5 As shown, the injection section 51b is tilted in the direction away from the lens 2, and the guide plate 7 arranged at the gas outlet of the injection section 51b indirectly guides the heated gas to the lens 2. The injection section 51b is tilted in the direction away from the lens 2, which increases the angle between the injection section 51b and the guide section 51a. This design allows the airflow to enter the air jet hole 51 more smoothly, avoids the local airflow being too strong or too weak, improves the stability of the airflow, and when the airflow enters the guide plate 7, it can be more evenly distributed, effectively improving the demisting efficiency.

[0029] like Figure 6 As shown, in the preferred embodiment of the present invention, one end of the air jet hole 51 is connected to the air outlet end of the micro fan 6, and the other end is inclined in a direction away from the lens 2, and the guide plate 7 arranged at the air outlet position of the air jet hole 51 indirectly guides the heated gas to the lens 2. The air jet hole 51 adopts an integrated through-hole design, which can reduce the turbulence and resistance of the airflow in the air jet hole 51, reduce energy loss, and make the airflow enter the guide plate 7 more smoothly.

[0030] On the basis of the above scheme, preferably, one end of the guide plate 7 is fixedly arranged on the outer surface of the airflow frame 5, and the other end is inclined toward the direction of the lens 2, and a confluence area 7a is formed at the air outlet of the air jet hole 51 toward the edge of the lens 2; the confluence area 7a is divergent toward the direction of the lens 2. The divergent confluence area 7a can make the airflow form a wider coverage when reaching the surface of the lens 2, and at the same time ensure the stability of the airflow through the rectification effect. This design can quickly and evenly transfer the heated gas to the surface of the lens 2, thereby accelerating the evaporation and diffusion of the water mist and significantly improving the demisting efficiency.

[0031] like Figure 7 As shown, in the present invention, a rectifying plate 8 is provided at one end of the guide plate 7 fixed to the outer side of the airflow frame 5, and the rectifying plate 8 is arranged parallel to the lens 2. Through the arrangement of the rectifying plate 8, a rectifying area is formed at the intersection with the guide plate 7, and the formation of the rectifying area can quickly stabilize the airflow entering the confluence area 7a, avoiding uneven demisting effect caused by airflow turbulence.

[0032] As a preferred embodiment of the above, the inner edge of the rectifying plate 8 is bent toward the lens 2 to extend a plurality of guide vanes corresponding to the plurality of air injection holes 51 , and the plurality of guide vanes are deformed by heat and spliced ​​into the guide plate 7 .

[0033] In this solution, the guide plate 7 is made of deformation memory alloy. These guide plates remain in their original state when not heated, and only spray airflow to the lens 2, which is suitable for scenes with light fog and reduces energy consumption. When the rearview mirror begins to heat up, the heated airflow causes the guide plate to deform due to heat, and moves in a direction away from the lens 2, and is spliced ​​into the guide plate 7, thereby increasing the area of ​​the spraying area on the lens 2, which is suitable for heavy fog or low temperature and high humidity environments, and can be quickly defogged. By changing the area of ​​the spraying area through the thermal deformation of the heat conducting plate, and dynamically adjusting the airflow intensity by controlling the fan speed, the system can optimize energy consumption under different working conditions, avoid overheating, and achieve rapid defog and uniform airflow distribution, significantly improving the clarity of the rearview mirror and reducing safety hazards during driving.

[0034] In a preferred embodiment of the present invention, Figure 8-9 As shown, the air outlets of the multiple jet holes 51 form an air outlet annular surface 51c; and the air outlet annular surface 51c is arranged perpendicular to the air outlet direction of the jet holes 51, so that the gas ejected from the jet holes 51 can be evenly diffused to the surroundings, avoiding turbulence at the air outlet, effectively reducing the resistance of the airflow during ejection, making the airflow ejected more smoothly, ensuring the injection speed of the airflow, and thus improving the overall efficiency and demisting effect of the system.

[0035] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rearview mirror with automatic mirror defogging function, characterized in that: include: A rearview mirror body, comprising a lens and a heater and a temperature and humidity sensor located on the back of the lens; An airflow frame, provided with a plurality of air jet holes along the circumferential direction, for guiding the gas heated by the heater in the rearview mirror body to the lens; A micro fan, integrated at the air inlet of the jet hole, to form an air flow in the jet hole; A control unit is connected to the heater and the temperature and humidity sensor, and is used to dynamically adjust the heating power of the heater and the airflow intensity in the air jet hole according to the feedback result of the temperature and humidity sensor.

2. The rearview mirror with automatic mirror defogging function according to claim 1, characterized in that: The air jet hole comprises a drainage section and an injection section, the drainage section is perpendicular to the lens, and the injection section and the drainage section are arranged at a certain angle.

3. The rearview mirror with automatic mirror defogging function according to claim 2, characterized in that: The spray section is arranged to be inclined toward the lens so as to directly spray the heated gas onto the lens.

4. The rearview mirror with automatic mirror defogging function according to claim 2, characterized in that: The injection section is arranged along a direction parallel to the lens; The guide plate arranged at the gas outlet of the injection section indirectly guides the heated gas to the lens.

5. The rearview mirror with automatic mirror defogging function according to claim 2, characterized in that: The injection section is arranged obliquely in a direction away from the lens, and a guide plate arranged at the gas outlet of the injection section indirectly guides the heated gas to the lens.

6. The rearview mirror with automatic mirror defogging function according to claim 1, characterized in that: One end of the jet hole is connected to the air outlet end of the micro fan, and the other end is inclined in a direction away from the lens, and a guide plate arranged at the air outlet position of the jet hole indirectly guides the heated gas to the lens.

7. The rearview mirror with automatic mirror defogging function according to any one of claims 4 to 6, characterized in that: One end of the guide plate is fixedly arranged on the outer side of the airflow frame, and the other end is inclined toward the direction of the lens, and forms a confluence area toward the edge of the lens at the air outlet of the air jet hole; The confluence area is divergent toward the lens.

8. The rearview mirror with automatic mirror defogging function according to claim 7, characterized in that: The guide plate is fixed to one end of the outer side of the airflow frame and is provided with a rectifying plate, and the rectifying plate is arranged parallel to the lens.

9. The rearview mirror with automatic mirror defogging function according to claim 8, characterized in that: The inner edge of the rectifying plate is bent toward the lens to extend to form a plurality of guide plates corresponding to the plurality of air jet holes. The plurality of guide plates are deformed by heat and spliced ​​into the guide plate.

10. The rearview mirror with automatic mirror defogging function according to claim 1, characterized in that: The gas outlets of the plurality of gas jet holes form a gas outlet annular surface; The air outlet annular surface is arranged perpendicular to the air outlet direction of the air injection hole.

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