JPH0618015U - Anti-fog device for rear window - Google Patents

Abstract

(57) [Summary] [Purpose] Effectively removes fogging in the rear window. [Structure] The outside air temperature detected by an outside air sensor 9 is lower than a predetermined value, and it is determined that the rear window 6 is fogged, so that the air conditioner 10 operates in the DEF mode or in the H / H mode.
When the D mode is selected or the R-DEF switch 11 is turned on, the control device 8 automatically rotates the fan 7 provided in the air flow passage 1 at the rear part of the vehicle interior. By the rotation of the fan 7, the inside air flows along the inner surface of the rear window 6 and is discharged from the air flow passage 1 to the outside of the vehicle, whereby the fog on the rear window 6 is rapidly removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an anti-fog device for a rear window of an automobile.

[0002]

[Prior art]

 Fogging occurs on the inside of a car window when the outside air temperature is low. Fogging generated on the front window is removed by blowing hot air directly by selecting DEF mode or H / D mode. Also, the fog generated in the rear window is heated and removed by turning on the R-DEF switch and energizing the heating wire directly attached to the rear window.

[0003]

[Problems to be solved by the device]

 However, the fog on the front window is rapidly removed by warm air, but the fog on the rear window is difficult to remove immediately because it takes time for the heat rays to heat the rear window. For this reason, it was extremely dangerous when the vehicle was backed up or when the vehicle was traveling in the front direction and the rear direction could not be sufficiently confirmed. The present invention has been made in view of the above problems, and an object of the present invention is to provide a rear window fog preventive device capable of effectively removing fog on the rear window.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an anti-fog device for a rear window, which is provided at the lower edge of the rear window and is provided in an air flow passage communicating between the inside and outside of the vehicle, and inside the air flow passage. And a controller that drives the fan when the outside air is below a predetermined temperature and the DEF mode or H / D mode is selected or the R-DEF switch is turned on. It was configured.

[0005]

[Action]

 In the present invention, when the outside air temperature is lower than the predetermined temperature and the DEF mode or the like is selected, the fan is automatically rotated by the control device. As a result, warm indoor air flows along the inner surface of the rear window and removes the fogging generated in this rear window.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an automobile equipped with an anti-fog device according to the present invention, in which an air flow passage 1 is formed in the rear portion of the vehicle. The air flow passage 1 is composed of a trunk room 2, an air suction path 3 communicating from the trunk room 2 to the inside of the vehicle, and an air discharge path 4 communicating from the trunk room 2 to the outside of the vehicle. An opening 5 is formed along the lower edge of the rear window 6 on the vehicle interior side of the air suction passage 3.

Further, a solar fan 7 having a solar cell provided on the roof as a power source is arranged in the air discharge path 4. The solar fan 7 is driven based on an operation signal from the control device 8. The control device 8 has a detection signal from the outside air sensor 9, an output signal from the air conditioner 10 indicating which mode (DEF mode, etc.) is selected, and an on / off state from the R-DEF switch 11. Signals are input respectively.

Hereinafter, drive control of the solar fan 7 by the control device 8 will be described with reference to the flowchart shown in FIG. In step S1, it is determined whether the outside air temperature detected by the outside air sensor 9 is -5 ° C or lower. This -5 ° C is a region where the compressor does not operate even when the air conditioner switch is turned on, and it is defined as the outside air temperature at which window fogging easily occurs, and is not necessarily limited to this temperature. Absent.

When the outside air temperature is −5 ° C. or lower, it is determined in step S2 whether the DEF mode or the H / D mode is selected. If these are selected, the solar fan 7 is turned on in step S3. Even if these are not selected, it is determined in step S4 whether or not the R-DEF switch 11 is turned on. If it is turned on, the solar fan 7 is turned on in step S3. And Then, the timer of the control device 8 is started in step S5, and it is determined in step S6 whether or not a certain time has elapsed. If the time has not elapsed, the operations of steps S1 to S6 are repeated.

If the outside air temperature is not -5 ° C or lower, or even if it is -5 ° C or lower, neither the DEF mode nor the H / D mode is selected by the air conditioner 10, and the R-DEF switch 11 is turned on. If it is not turned on, the solar fan 7 is turned off in step S7. Then, in step S8, the timer of the control device 8 is reset.

As described above, as conditions for generating fogging on the inner surface of the rear window 6, the outside air temperature is −5 ° C. or lower, and the DEF mode or the H / D mode is selected. It is detected whether or not it is turned on, and the solar fan 7 is rotationally driven only when cloudiness actually occurs.

Due to the rotation of the solar fan 7, warm inside air flows along the inner surface of the rear window 6 inside the vehicle. As a result, the fog generated on the inner surface of the rear window 6 becomes water vapor and is included in the flowing air. The inside air sucked from the opening 5 reaches the inside of the trunk room 2 from the air suction passage 3 and is then discharged outside the vehicle through the air discharge passage 4. Further, due to the exhaust air, the humidity inside the vehicle is lowered and the fog on the rear window 6 is easily removed. Therefore, the cloudiness is rapidly removed without waiting for the heating of the rear window 6 by the heat rays.

[0013]

[Effect of device]

 As is clear from the above description, according to the rear window fog preventive device of the present invention, when the outside air temperature is low and the window is fogged and the DEF mode or the like is selected, it is automatically performed. Since the fan is driven so that the inside air can be discharged from the air flow passage opening to the lower edge of the rear window, the inside air flows along the inner surface of the rear window and the fogging is effectively removed.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an automobile including a rear window fog-preventing device according to the present embodiment.

FIG. 2 is a flow chart diagram for driving the rear window fog-preventing device according to the present embodiment.

[Explanation of symbols]

1 ... Air flow passage, 6 ... Rear window, 7 ... Solar fan, 9 ... Outside air sensor, 10 ... Air conditioner, 11 ... R-DE
F switch.

Claims (1)

[Scope of utility model registration request] 1. An air flow passage that opens at a lower edge of a rear window and communicates with the inside and outside of a vehicle, and is arranged in the air flow passage,
A fan for discharging the inside air to the outside of the vehicle and a controller for driving the fan when the outside air is at a predetermined temperature or lower and the DEF mode or the H / D mode is selected or the R-DEF switch is turned on. A rear window anti-fog device characterized in that