JPH057842Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an anti-fogging device for a door window, and more particularly to an anti-fogging device for a door window that prevents the outside of a window from fogging.

[Conventional technology]

Most cars these days use air.
It is equipped with an air conditioner (hereinafter simply referred to as "air conditioner"). and,
Many of these air conditioners have a configuration in which temperature-controlled and humidity-controlled air is applied to a window and diffused into the interior of the vehicle. For this reason, the air inside the car is always set to a comfortable condition, and the windows on the inside of the car are almost never fogged up.

[Problem that the invention attempts to solve]

However, in such a conventional example, since cooled air is applied to the window in summer, for example, the air outside the vehicle is cooled and condensation occurs on the outside of the window.

[Purpose of invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an anti-fogging device for a door window that can overcome the disadvantages of the prior art and effectively prevent the formation of dew on the outer surface of the window.

[Means for solving problems]

In this invention, a humidity sensor and a temperature sensor are installed outside the vehicle, and an inside temperature sensor is installed at the air outlet of the ventilator, and the condensation temperature of the outside air is calculated based on the outputs of the humidity sensor and temperature sensor. A first arithmetic circuit that compares the output of the first arithmetic circuit with the output of the in-vehicle air temperature sensor, and when the in-vehicle air outlet temperature sensor detects a temperature lower than the dew condensation temperature of the outside air, immediately sets a predetermined value. A second arithmetic circuit that outputs a signal is provided. The second arithmetic circuit operates in accordance with the output of the second arithmetic circuit to drive a separately installed ventilator louver drive means to direct the direction of air sent from the ventilator portion into the vehicle interior from the window side toward the center of the vehicle interior. The structure is equipped with a drive control section that performs switching control. This aims to achieve the above-mentioned purpose.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In FIG. 1, reference numeral 1 indicates a ventilator louver driving means, reference numeral 2 indicates a control means, and reference numeral 3 indicates a sensor section.

In this embodiment, the sensor unit 3 includes a humidity sensor 3A that measures the outside humidity, a temperature sensor 3B that detects the outside temperature, and an in-vehicle temperature sensor that measures the temperature of the air blown from the ventilator inside the car. 3C, each of which is mounted at a predetermined location where it can perform its respective function.

The control means 2 includes first and second arithmetic circuits 2
A, 2B, and a drive control section 2C. Of these, the first arithmetic circuit 2A has a function of inputting the outputs of the outside air humidity sensor 3A and temperature sensor 3B, and calculating the dew condensation temperature of the outside air based on the outputs. Further, the second arithmetic circuit 2B compares the output of the first arithmetic circuit 2A and the output of the in-vehicle air outlet temperature sensor 3C, and when the in-vehicle air outlet temperature sensor 3C detects a temperature lower than the dew condensation temperature, the second arithmetic circuit 2B immediately performs a predetermined operation. It has the function of outputting signals. The drive control section 2C, which receives the output of the second arithmetic circuit 2B, immediately operates the ventilator louver drive means 1.

In this embodiment, the ventilator louver driving means 1 is formed by a solenoid mechanism. Second
An example of a ventilator louver is shown in FIGS. In these figures, reference numeral 11 indicates an air outlet. The air outlet 11 is equipped with three fins 12A, 12B, and 12C for varying the blowing direction. Symbols 13 and 14 are respectively Fin 1
The support plate which rotatably supports each of 2A to 12C is shown. Also, symbols 15a, 15b, 15e and 1
5A, 15B, and 15E each indicate a rotation support shaft.

Among the fins 12A to 12C, the central fin 12B is fixedly equipped with a rotating gear 15 as shown in FIG. It is designed to rotate. In this case, the other fins 12A and 12C are connected by a flexible connecting rod (not shown).
The fins 12A to 12C are connected to each other so as to be integrally rotatable, so that the fins 12A to 12C can be integrally rotated in the same direction as the central fin 12B.

The rotating gear 15 is formed by a pinion gear that is biased by the rack gear 16 and rotates back and forth. The rack gear 16 is guided by a guide member 17 so that it can reciprocate in the direction of arrow A or B in FIG. In this case, the rack gear 16 is biased by the solenoid mechanism as the ventilator louver drive means 1 described above to reciprocate.

Next, the operation of the control means 2 will be explained based on FIG. 5.

First, an ignition switch (not shown) is operated to set the engine to a starting state. In this case, the control means 2 is also powered on. Therefore, the control means 2 immediately operates to control the sensor section 3.
, that is, information regarding the outside temperature and humidity and the temperature of the air sent out from the ventilator 10 section (FIG. 5, S2). In this control means 2, the first and second arithmetic circuits 2A and 2B operate based on each input information, and the first arithmetic circuit 2A first calculates the condensation temperature _TK (S3), and then Then, the second arithmetic circuit 2B compares whether the temperature T _IN of the air blown from the ventilator 10 is lower than the dew condensation temperature T _K (FIG. 5, S4).

Here, if T _IN > T _K , the second arithmetic circuit 2B
does not output any control signals. Therefore, the air blown from the ventilator 10 continues to be blown out toward the window.

On the other hand, if T _IN < T _K , the temperature of the air blown inside the car is lower than the condensation temperature T _K of the outside air, so if this is left untreated, the window glass will become below the condensation temperature T _K.
Condensation forms on the outside of the window glass. In such a case, the aforementioned second arithmetic circuit 2B is activated to immediately activate the ventilator louver drive means 1, thereby switching the direction of air blowing from the ventilator 10 from the window side to the center side of the vehicle interior. Therefore, dew condensation on the outer surface of the window glass is effectively prevented.

Note that in the above embodiment, the first arithmetic circuit 2
Although the case where A calculates the dew condensation temperature T _K by a predetermined calculation is illustrated, the relationship between the dew condensation temperature and humidity is calculated in advance and stored in a predetermined memory.
When information on outside air temperature and outside air humidity is input, the corresponding dew condensation temperature may be immediately retrieved from the memory and output. In this way, the control operation in the control means 2 can be speeded up.

[Effect of idea]

Since the present invention is configured and functions as described above,
By using this, it is possible to provide an unprecedented and practical door window defogging device that can almost completely prevent the inconvenience of dew condensation forming on the outer surface of a car window while the engine is running.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.
Figure 2 is a front view showing the ventilator part of the car, Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is a bottom view of Figure 2, and Figure 5 is the control means in Figure 1. It is a flowchart showing the operation of the parts. DESCRIPTION OF SYMBOLS 1... Ventilator louver driving means, 2... Control means, 2A... First arithmetic circuit, 2B... Second
Arithmetic circuit, 2C... Drive control unit, 3A... External humidity sensor, 3B... External temperature sensor, 3C...
Outlet temperature sensor, 10...ventilator.

Claims (1)

[Scope of Claim for Utility Model Registration] A humidity sensor and a temperature sensor are each installed on the outside of the car, and an air outlet temperature sensor inside the car is installed at the air outlet of the ventilator. a first arithmetic circuit that calculates the condensation temperature of the outside air, and compares the output of the first arithmetic circuit with the output of the in-vehicle air temperature sensor, and determines that the in-vehicle air outlet temperature sensor has a temperature lower than the dew condensation temperature of the outside air. A second arithmetic circuit is provided which immediately outputs a predetermined signal when the detection is detected, and the second arithmetic circuit operates in accordance with the output of the second arithmetic circuit to drive a separately equipped ventilator louver drive means to move the ventilator from the inside of the vehicle. An anti-fog device for a door window, characterized in that it is equipped with a drive control unit that controls the direction of air being blown from the window side to the center of the vehicle interior.