Water removal system and water removal method for automobile front door glass

Abstract

The invention provides a water removal system and a water removal method for automobile front door glass. The water removal system is used for removing water stains outside window glass of a front vehicle door; the water removal system comprises a control unit, and an air supply unit, a water removal instruction triggering unit and an air outlet assembly which are connected with the control unit; the air outlet assembly is arranged on the side, facing vehicle window glass, of a shell of the rearview mirror, and an air supply pipeline is communicated between the air supply unit and the air outlet assembly. The water removal instruction triggering unit is used for sending a water removal control signal to the control unit, the control unit controls the air supply unit to supply air to the air supply pipeline according to the water removal control signal, and the air outlet assembly blows air flow from the air supply pipeline to an area, where a rearview mirror is observed, on the window glass so as to remove water stains on the area outside the window glass. According to the water removal system, water stains on the area, where the rearview mirror is observed, of the window glass can be effectively removed in time, and therefore a water removal scheme for the exterior of the window glass of the front car door is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a water removal system. In addition, the present invention also relates to a water removal method for automobile front door glass. Background Art

[0002] As the number of private cars increases, traffic congestion is becoming more common, and it is more serious on rainy days because it is more likely to cause collisions. On the one hand, the slippery road surface increases the braking distance, and on the other hand, the rain covers the glass, which reduces the visibility.

[0003] For the latter, a series of technologies have been developed, such as windshield wipers, mirror heating, and mirror rain eyebrows; however, these technologies do not involve dehumidification of the front door glass area. At present, the only visual perception technology that involves observing the rearview mirror area on the front door window glass is the defogging function inside the window glass. When changing lanes or reversing, we need to observe the image in the rearview mirror through the front door window glass, so the area where the rearview mirror is observed on the front of the window glass also needs to be dehumidified.

[0004] It is undeniable that high-speed driving can remove rain from the front door glass, but during the rush hour of commuting in the city, the speed of the car is very slow. Although the water shear outside the front door during the glass lifting process can also scrape off the rain on the glass, opening the window will cause rain to enter the car. Therefore, we need a water removal solution for the outside of the front door window glass that does not rely on high speed and external water shear. Summary of the invention

[0005] In view of this, the present invention aims to propose a water removal system to provide a water removal solution for the exterior of the window glass of the front door.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A water removal system for removing water stains from the exterior of a vehicle window glass of a front vehicle door; the water removal system comprises a control unit, and an air supply unit connected to the control unit, a water removal instruction trigger unit and an air outlet assembly; the air outlet assembly is arranged on a side of a housing of a rearview mirror facing the vehicle window glass, and an air supply pipeline is connected between the air supply unit and the air outlet assembly;

[0008] The water removal instruction trigger unit is used to send a water removal control signal to the control unit, and the control unit controls the air supply of the air supply unit to the air supply pipeline according to the water removal control signal. The air outlet assembly blows the airflow from the air supply pipeline to the area on the vehicle window glass where the rearview mirror is observed, so as to remove water stains in this area outside the vehicle window glass.

[0009] Furthermore, the air supply pipeline is arranged in the wiring harness of the rearview mirror.

[0010] Further, the dewatering instruction triggering unit includes a rain sensor, a vehicle speed sensor and a window closing detection switch, and / or the dewatering instruction triggering unit includes a dewatering switch.

[0011] Furthermore, the air supply unit includes a pressure accumulator tank, an air compressor connected to the pressure accumulator tank, and an air pressure sensor for detecting the air pressure in the pressure accumulator tank, and a one-way valve is provided on the connecting pipeline between the air compressor and the pressure accumulator tank; the pressure accumulator tank is connected to the air supply pipeline, the air compressor and the air pressure sensor are both connected to the control unit, the air pressure sensor sends a detection signal to the control unit, and the air compressor is started and stopped under the control of the control unit.

[0012] Furthermore, the gas supply unit includes a pressure relief valve for discharging the gas in the pressure storage tank, and the pressure relief valve is connected to the control unit and is opened and closed under the control of the control unit.

[0013] Furthermore, the air supply unit includes an air supply valve disposed between the pressure accumulator tank and the air supply pipeline, and the air supply valve is connected to the control unit to be opened and closed under the control of the control unit.

[0014] Furthermore, an air outlet window is provided on the shell, and the air outlet assembly includes an inner shell arranged at the air outlet window, and a guide grille arranged inside the inner shell; the inner shell is provided with an air inlet for connecting to the air supply pipeline, and the airflow from the air supply pipeline enters the inner shell through the air inlet, and is blown out from the air outlet window after being guided by the guide grille.

[0015] Furthermore, the guide grille includes a plurality of longitudinal guide blades and a plurality of transverse guide blades that are spaced apart from each other; each of the longitudinal guide blades and each of the transverse guide blades intersects with each other, and a plurality of guide ports are separated in the air outlet window.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The dewatering system of the present invention is configured with an air supply unit and an air outlet assembly arranged on the rearview mirror. It determines the dewatering demand based on the dewatering control signal collected by the control unit, and controls the air supply unit to supply air to the air outlet assembly through the air supply pipeline, thereby forming air blowing dewatering on the outside of the vehicle window glass. Water stains on the area of ​​the vehicle window glass where the rearview mirror is observed can be removed timely and effectively, thereby providing a dewatering solution for the outside of the vehicle window glass of the front door.

[0018] In addition, by setting up a rain sensor, a vehicle speed sensor and a window closing detection switch, the need for water removal can be automatically determined based on the corresponding rainfall signal, vehicle speed signal, and window closing signal, thereby achieving automatic water removal from the window glass, which is beneficial to improving the vehicle's automation control level.

[0019] Another object of the present invention is to propose a method for removing water from the front door glass of a car, obtain a water removal control signal related to removing water stains on the outside of the window glass of the front door, and issue the water removal instruction based on the water removal control signal; when the water removal instruction is issued, air is supplied by an air source with a set pressure to blow air from the outside of the front door to the area on the window glass where the rearview mirror is observed.

[0020] Furthermore, the dewatering control signal includes a rainfall amount signal, a vehicle speed signal, and a window closing signal, and the dewatering instruction is issued only when the vehicle speed signal is below a set vehicle speed, the rainfall amount signal is above a set rainfall value, and the window closing signal exists, and the set pressure increases with an increase in the rainfall amount signal; or, the dewatering control signal includes a dewatering switch signal, and the dewatering instruction is issued when the dewatering switch signal exists.

[0021] The method for removing water from the automobile front door glass of the present invention can determine a reasonable time for removing water with the help of an acquired water removal control signal, and can effectively remove water stains on the window glass by blowing gas from the outside of the front door toward the surface of the window glass, thereby providing a water removal solution for the outside of the window glass of the front door; this makes it easier for the driver to view the image on the reflective glass of the rearview mirror through the window glass, which is beneficial to improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, up and down, etc. involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0023] Figure 1 A schematic diagram of the system structure of the water removal system according to the first embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of an air outlet assembly according to Embodiment 1 of the present invention being arranged on a rearview mirror;

[0025] Figure 3 This is a schematic diagram of the arrangement structure of the air outlet assembly and the air supply pipeline according to the first embodiment of the present invention;

[0026] Figure 4Schematic diagram of the arrangement position of the air outlet assembly in the rearview mirror according to the first embodiment of the present invention;

[0027] Figure 5 This is an overall structural diagram of the air outlet assembly according to the first embodiment of the present invention;

[0028] Figure 6 This is a schematic structural diagram of the guide grille in the air outlet assembly according to the first embodiment of the present invention;

[0029] Figure 7 It is a schematic diagram of the air flow distribution of the air outlet assembly according to the first embodiment of the present invention for removing water from the air flow blowing on the vehicle window glass;

[0030] Figure 8 The figure is a schematic diagram of the control flow of the method for removing water from the front door glass of an automobile according to the second embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 10. Pressure accumulator; 11. Air compressor; 12. One-way valve; 13. Air pressure sensor; 14. Pressure relief valve;

[0033] 2. Control unit;

[0034] 3. Water removal command trigger unit; 31. Rain sensor; 32. Vehicle speed sensor; 33. Water removal switch; 34. Window closing detection switch;

[0035] 4. Air supply pipeline; 40. Air supply valve;

[0036] 5. Air outlet assembly; 50. Inner shell; 500. Air inlet; 51. Guide grille; 511. Longitudinal guide blade; 512. Transverse guide blade;

[0037] 6. rearview mirror; 60. housing; 600. air outlet window; 61. reflective glass; 62. mounting seat; 63. wiring harness; 64. rearview mirror adjustment mechanism;

[0038] 7. Front door; 70. Window glass; 71. Water removal area; 72. Water removal airflow. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] In the description of the present invention, it should be stated that if terms indicating directions or positional relationships such as "up, down, left, right, front, back, inside, outside" appear, they are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operate in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0041] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0043] Embodiment 1

[0044] This embodiment relates to a water removal system for removing water stains on the outside of the window glass 70 of the front door 7, and can timely and effectively remove water stains on the window glass 70 where the rearview mirror 6 is observed; an exemplary system structure is as follows Figure 1 shown.

[0045] In general, the dewatering system includes a control unit 2, an air supply unit connected to the control unit 2, a dewatering command trigger unit 3, and an air outlet assembly 5. The air outlet assembly 5 is arranged on the side of the housing 60 of the rearview mirror 6 facing the vehicle window glass 70, and an air supply pipeline 4 is connected between the air supply unit and the air outlet assembly 5; the dewatering command trigger unit 3 is used to send a dewatering control signal to the control unit 2, and the control unit 2 controls the air supply of the air supply unit to the air supply pipeline 4 according to the dewatering control signal, and the air outlet assembly 5 blows the airflow from the air supply pipeline 4 to the area on the vehicle window glass 70 where the rearview mirror 6 is observed, so as to remove water stains in the area outside the vehicle window glass 70.

[0046] Specifically, the dewatering instruction trigger unit 3 of this embodiment includes a rain sensor 31, a vehicle speed sensor 32, and a window closing detection switch 34. By setting the rain sensor 31, the vehicle speed sensor 32, and the window closing detection switch 34, the dewatering demand can be automatically determined according to the corresponding rainfall signal, vehicle speed signal, and window closing signal, thereby realizing automatic dewatering of the window glass 70, which is beneficial to improving the level of automatic control of the vehicle. Of course, the dewatering instruction trigger unit 3 can also include only one dewatering switch 33, and dewatering is only controlled manually; however, preferably, while setting the rain sensor 31, the vehicle speed sensor 32, and the window closing detection switch 34, the dewatering switch 33 is also set, so that the driver can manually control the dewatering of the window glass 70, thereby improving the flexible controllability of the dewatering control.

[0047] It should be noted that the above-mentioned water removal switch 33 is a newly added setting of the vehicle, and can be set on the inner side of the front door 7 on the driver's side. The above-mentioned rain sensor 31, vehicle speed sensor 32 and window closing detection switch 34 can use existing sensor devices on the vehicle, and can read relevant signals from the vehicle-mounted ECU (Electronic Control Unit, i.e., the vehicle-mounted computer). The control unit 2 of this embodiment can be configured separately or directly replaced by the ECU.

[0048] There are of course many configurations for the air supply unit. The gas supply of the existing compressed air system on the vehicle can be used, or a compressed air source can be configured separately. In this embodiment, the air supply unit includes a pressure accumulator 10, an air compressor 11 connected to the pressure accumulator 10, and an air pressure sensor 13 for detecting the air pressure in the pressure accumulator 10, and a one-way valve 12 is provided on the connecting pipeline between the air compressor 11 and the pressure accumulator 10. The pressure accumulator 10 is connected to the air supply pipeline 4, and the air compressor 11 and the air pressure sensor 13 are both connected to the control unit 2. The air pressure sensor 13 sends a detection signal to the control unit 2 to realize the closed-loop control of the system air pressure change. The air compressor 11 is controlled by the control unit 2 to start and stop. The air supply unit is equipped with a pressure accumulator tank 10, an air compressor 11, a one-way valve 12 and an air pressure sensor 13, etc., which can automatically replenish the pressure accumulator tank 10 with air according to the air pressure conditions in the pressure accumulator tank 10, and can flexibly control the internal pressure of the pressure accumulator tank 10 to provide air sources with different air pressure levels for the air outlet assembly 5, thereby improving the water removal effect of the vehicle window glass 70.

[0049] In addition, the gas supply unit of this embodiment further includes a pressure relief valve 14 for discharging gas in the pressure accumulator 10, and a gas supply valve 40 provided between the pressure accumulator 10 and the gas supply pipeline 4. The pressure relief valve 14 is connected to the control unit 2 and is opened and closed under the control of the control unit 2; the gas supply valve 40 is connected to the control unit 2 and is opened and closed under the control of the control unit 2.

[0050] The pressure accumulator 10 is provided with a pressure relief valve 14. When the internal air pressure of the pressure accumulator 10 is too high, the pressure in the pressure accumulator 10 can be reduced by discharging gas, which is not only conducive to ensuring the safety of the air supply unit, but also can cooperate with the air compressor 11 to more flexibly control the air pressure level in the pressure accumulator 10. By configuring the air supply valve 40, the opening and closing actions of the air supply valve 40 can be flexibly controlled by the control unit 2 to switch the air supply state of the air supply pipeline 4, thereby smoothly realizing the start and stop control of water removal.

[0051] like Figure 2 , Figure 3 and Figure 4 As shown, the air supply line 4 of this embodiment is arranged in the wiring harness 63 of the rearview mirror 6. The air supply line 4 is arranged along the wiring harness 63 of the rearview mirror 6, and the air supply line 4 is passed through the wiring harness 63, so that the arrangement of the air supply line 4 and the wiring harness 63 of the rearview mirror 6 can be completed simultaneously, so that the air supply line 4 is arranged in a hidden manner, and the integrated installation configuration is convenient. When the rearview mirror 6 is installed on the front door 7 through the mounting seat 62, the arrangement of the air supply line 4 is realized, thereby improving the assembly efficiency.

[0052] In order to facilitate the installation of the air outlet assembly 5 on the housing 60, an air outlet window 600 is provided on the housing 60 of this embodiment. The air outlet assembly 5 includes an inner housing 50 disposed at the air outlet window 600, and a guide grille 51 disposed inside the inner housing 50. The specific structural form of the inner housing 50 can be flexibly designed under the premise that the internal space of the housing 60 allows. In this embodiment, as shown in FIG. Figure 5 As shown, the inner shell 50 is provided with an air inlet 500 for connecting the air supply pipeline 4. The airflow from the air supply pipeline 4 enters the inner shell 50 through the air inlet 500, and is guided by the guide grille 51 and blown out from the air outlet window 600. The inner shell 50 is arranged at the air outlet window 600 of the shell 60, so that the airflow supplied by the air supply pipeline 4 can be diffused to a certain extent in the inner shell 50, and then blown out from the air outlet window 600, and the airflow can be prevented from leaking into the shell 60 to affect the rearview mirror adjustment mechanism 64 and the wiring harness 63 in the shell 60. By arranging the guide grille 51 in the inner shell 50, the airflow can be effectively guided so that the airflow is blown out to the window glass 70 in the best direction, thereby improving the water removal effect.

[0053] like Figure 6 As shown, the guide grille 51 of this embodiment includes a plurality of longitudinal guide blades 511 and a plurality of transverse guide blades 512 arranged at intervals; each longitudinal guide blade 511 and each transverse guide blade 512 cross each other, and a plurality of guide ports are separated in the air outlet window 600. The cross arrangement of the plurality of longitudinal guide blades 511 and the transverse guide blades 512 can further enhance the guide effect of the guide grille 51. Through the above arrangement, as shown in FIG. Figure 7 As shown, the airflow blown out by the air outlet assembly 5 can be blown in a divergent manner toward the dewatering area 71 on the window glass 70 that the driver needs to pass through when observing the rearview mirror 6, and the flow distribution of the airflow is shown in the dewatering airflow 72 shown in the figure.

[0054] To summarize, the dehydration system of the present embodiment, by configuring an air supply unit and an air outlet assembly 5 provided on the rearview mirror 6, determines the dehydration demand based on the dehydration control signal collected by the control unit 2, and controls the air supply unit to supply air to the air outlet assembly 5 through the air supply pipeline 4, thereby forming air blowing dehydration on the outside of the vehicle window glass 70, which can timely and effectively remove water stains on the vehicle window glass 70 in the area where the rearview mirror 6 is observed, thereby providing a dehydration solution for the outside of the vehicle window glass 70 of the front door 7.

[0055] Embodiment 2

[0056] This embodiment relates to a method for removing water from the front door glass of an automobile, an exemplary control process of which is as follows: Figure 8 As shown; the method mainly comprises the following steps:

[0057] Acquire a water removal control signal related to removing water stains outside the window glass 70 of the front door 7, and issue a water removal instruction based on the water removal control signal;

[0058] When the dewatering command is issued, air is supplied by an air source with a set pressure to blow air from the outside of the front door 7 to the area on the window glass 70 where the rearview mirror 6 is observed.

[0059] Based on the dewatering method of this embodiment, of course, dewatering systems with various configurations can be set up. For ease of understanding, the dewatering method for the automobile front door glass of this embodiment is described below in conjunction with the dewatering system provided in the first embodiment.

[0060] Specifically, the dewatering method of this embodiment includes an automatic mode and a manual mode. The switching between the two modes can be achieved by setting an automatic switch and a manual switch. When the automatic switch is closed, the dewatering is controlled in the automatic mode, and when the manual switch is closed, the dewatering is controlled in the manual mode.

[0061] In the automatic mode, the water removal control signal of this embodiment includes a rain amount signal, a vehicle speed signal, and a window closing signal; wherein the rain amount signal is provided by the rain sensor 31, the vehicle speed signal is provided by the vehicle speed sensor 32, and the window closing signal is provided by the window closing detection switch 34. These signals can be directly obtained from the corresponding sensor device, or directly read from the vehicle-mounted ECU.

[0062] Based on the above signals, the water removal command is issued only when the following conditions are met:

[0063] (1) The vehicle speed signal is below the set speed;

[0064] (2) The rainfall signal is above the set rainfall value;

[0065] (3) There is a window closing signal (and the window glass 70 is in the closed state).

[0066] In addition, the above-mentioned set pressure can be changed to a variable value. In this embodiment, when the above-mentioned dewatering conditions are met, the set pressure increases with the increase of the rainfall signal. Specifically, the control unit 2 determines whether to drive the air compressor 11 to work based on the rain signal measured by the rain sensor 31 (the rain signal at this moment is above the set rainfall value), and at the same time, establishes different system pressures in the accumulator 10 based on the measured rain signal; in this way, the blowing force can be changed according to the required dewatering force, and a large amount of rain corresponds to a high-pressure blowing, and a small amount of rain corresponds to a low-pressure blowing, so as to obtain the most suitable dewatering effect. When the pressure in the accumulator 10 reaches the required level of set pressure, the air compressor 11 stops working. At this time, when the vehicle speed signal and the window closing signal of the control unit 2 are also satisfied, the dewatering instruction is executed with the air source of the set pressure corresponding to the level of the rain signal, and the window glass 70 is automatically dewatered.

[0067] It should be noted that the above-mentioned set vehicle speed is flexibly set within a reasonable range, for example, set to 40 kilometers per hour. When the vehicle speed is slow or stopped, the air flow speed on the surface of the vehicle is slow, and the rain on the vehicle window glass 70 cannot be blown away automatically. At this time, it is necessary to start the water removal action; when the vehicle speed is fast, the air flow speed on the surface of the vehicle is fast, and the rain on the vehicle window glass 70 can be blown away automatically. At this time, there is no need to execute the water removal instruction.

[0068] In manual mode, the dewatering control signal of the present embodiment includes a dewatering switch signal, and a dewatering instruction is issued when there is a dewatering switch signal. The dewatering switch signal can be provided by the dewatering switch 33. The difference between this mode and the automatic mode is that the air supply valve 40 will not be automatically opened or closed according to the speed of the vehicle. The air supply valve 40 is controlled by the dewatering switch signal at this time, which is convenient for the driver's subjective operation. In the case where a rain sensor 31 is provided at the same time, this mode is divided into two situations: a rain size signal and a rain size signal. When there is a rain size signal, the system establishes a set pressure of the corresponding level in advance according to the measured rain size. At this time, as long as the dewatering switch is pressed and the window glass 70 is in a closed state, the air supply valve 40 can be opened, and the dewatering instruction is executed with the air source of the set pressure corresponding to the rain size signal. When there is no rain signal, there are two corresponding situations at this time, one is that there is no rain, and the other is that the rain sensor 31 fails. At this time, the air supply unit is adjusted to the highest set pressure by default, and the air source of the highest set pressure is used to supply air and execute the dewatering instruction to cope with various rainfall situations.

[0069] To summarize, with the help of the obtained water removal control signal, a reasonable time for water removal can be determined, and air can be blown from the outside of the front door 7 toward the surface of the window glass 70 to effectively remove water stains on the window glass 70, thereby providing a water removal solution for the outside of the window glass 70 of the front door 7; this makes it easier for the driver to view the image on the reflective glass 61 of the rearview mirror 6 through the window glass 70, which is beneficial to improving driving safety.

[0070] In the method for removing water from the automobile front door glass of the present embodiment and the dewatering system of the first embodiment, a high-speed airflow is provided by means of an air compressor 11, and the high-speed airflow is directed to the front of the vehicle window glass 70, so that the water stains attached to the vehicle window glass 70 are washed away by the high-speed airflow, so that the driver can clearly observe the image in the rearview mirror 6, thereby improving the clarity of vision behind the vehicle when driving at a low speed in rainy days, reducing collisions and scratches caused by poor vision, and fundamentally improving driving safety when driving in rainy days. It is also beneficial to improve the traffic congestion problem caused by scratches due to the affected vision in rainy days.

[0071] The high-pressure gas water removal method of this embodiment is easier to arrange and implement than the mechanical structure type windshield wiper. In the overall system solution of this embodiment, the degree of electronic control is relatively high, and different system set pressures in the pressure accumulator 10 can be established according to different rainfall amounts. Different set pressures correspond to different blowing wind speeds of the air outlet assembly 5, thereby achieving changes in cleaning strength and automatic adaptation; moreover, there is no need to establish the maximum system set pressure for the pressure accumulator 10 at all times, which can reduce the energy consumption of the air compressor 11.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water removal system for removing water stains from the exterior of a vehicle window glass (70) of a front vehicle door (7); characterized in that: The dewatering system comprises a control unit (2), and an air supply unit connected to the control unit (2), a dewatering instruction trigger unit (3) and an air outlet assembly (5); The air outlet assembly (5) is arranged on a side of a housing (60) of a rearview mirror (6) facing the vehicle window glass (70), and an air supply pipeline (4) is connected between the air supply unit and the air outlet assembly (5); The dewatering instruction trigger unit (3) is used to send a dewatering control signal to the control unit (2); the control unit (2) controls the air supply of the air supply unit to the air supply pipeline (4) according to the dewatering control signal; the air outlet assembly (5) blows the air flow from the air supply pipeline (4) to the area on the vehicle window glass (70) where the rearview mirror (6) is observed, so as to remove water stains in the area outside the vehicle window glass (70).

2. The water removal system according to claim 1, characterized in that: The air supply pipeline (4) is arranged in the wiring harness (63) of the rearview mirror (6).

3. The water removal system according to claim 1, characterized in that: The dewatering instruction trigger unit (3) comprises a rain sensor (31), a vehicle speed sensor (32) and a vehicle window closing detection switch (34), and / or the dewatering instruction trigger unit (3) comprises a dewatering switch (33).

4. The water removal system according to claim 1, characterized in that: The air supply unit comprises a pressure accumulator (10), an air compressor (11) connected to the pressure accumulator (10), and an air pressure sensor (13) for detecting the air pressure in the pressure accumulator (10), and a one-way valve (12) is provided on the connecting pipeline between the air compressor (11) and the pressure accumulator (10); The pressure accumulator tank (10) is in communication with the air supply pipeline (4), the air compressor (11) and the air pressure sensor (13) are both connected to the control unit (2), the air pressure sensor (13) sends a detection signal to the control unit (2), and the air compressor (11) is started and stopped under the control of the control unit (2).

5. The water removal system according to claim 4, characterized in that: The gas supply unit comprises a pressure relief valve (14) for discharging gas in the pressure storage tank (10); the pressure relief valve (14) is connected to the control unit (2) and is opened and closed under the control of the control unit (2).

6. The water removal system according to claim 4, characterized in that: The air supply unit comprises an air supply valve (40) arranged between the pressure accumulator (10) and the air supply pipeline (4); the air supply valve (40) is connected to the control unit (2) so as to be opened and closed under the control of the control unit (2).

7. The water removal system according to any one of claims 1 to 6, characterized in that: An air outlet window (600) is provided on the shell (60), and the air outlet assembly (5) comprises an inner shell (50) arranged at the air outlet window (600), and a guide grille (51) arranged inside the inner shell (50); The inner shell (50) is provided with an air inlet (500) for connecting to the air supply pipeline (4); airflow from the air supply pipeline (4) enters the inner shell (50) through the air inlet (500), and is guided by the guide grille (51) before being blown out from the air outlet window (600).

8. The water removal system according to claim 7, characterized in that: The guide grid (51) comprises a plurality of longitudinal guide blades (511) and a plurality of transverse guide blades (512) arranged at intervals; Each of the longitudinal guide blades (511) and each of the transverse guide blades (512) intersect each other, and a plurality of guide ports are separated in the air outlet window (600).

9. A method for removing water from the front door glass of an automobile, characterized in that: Acquiring a water removal control signal related to removing water stains on the outside of a window glass (70) of a front door (7), and issuing the water removal instruction based on the water removal control signal; When the dewatering instruction is issued, air is supplied by an air source with a set pressure to blow air from the outside of the front door (7) onto the window glass (70) to observe the area of ​​the rearview mirror (6).

10. The method for removing water from the front door glass of an automobile according to claim 9, characterized in that: The dewatering control signal includes a rain signal, a vehicle speed signal, and a window closing signal. The dewatering instruction is issued only when the vehicle speed signal is below a set vehicle speed, the rain signal is above a set rain value, and the window closing signal exists, and the set pressure increases with the increase of the rain signal. Alternatively, the water removal control signal includes a water removal switch signal, and the water removal instruction is issued when the water removal switch signal exists.

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