JPS59184046A - Anti-moisture window pane for automobile - Google Patents

Abstract

PURPOSE:To quickly remove moisture from an automobile window pane, by providing the pane with a heater made of a transparent electroconductive film and by supplying electricity to the heater to heat. CONSTITUTION:A heater 2 is made of a transparent electroconductive film of 8,000Angstrom in thickness on a side pane 1. Electrodes 3 are provided on the ends of the heater 2. The transparent electroconductive film is of ITO. The electrodes 3 are of aluminum. The electrodes are connected to a battery 5 through lead wires 4. The heater 2 is shaped as an inverted U to make its electric resistance highest in the central part as shown by a dotted line in the drawing, so that the calorific value is the largest in the central part when electricity is applied. As a result, moisture is removed starting with the central part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile window glass that prevents exposure due to dew condensation.

Conventionally, as a device for preventing fogging caused by dew condensation on the surface of an automobile window glass, a defroster device that uses a fan to blow warm air onto the surface of the window glass has been used.

However, the defroster device had the following drawbacks.

First, the anti-fogging effect was low because the anti-fogging effect did not uniformly hit the window glass.

Second, since the defroster device is integrated with the air conditioner, when the defroster device is activated, the warm air that does not blow out from the device causes the room temperature of the car to rise more than necessary, making it difficult to maintain the temperature inside the car at a comfortable temperature. Also, there was a large loss of energy.

Third, the defroster system was very noisy when operating.

The present invention was devised in response to the above-mentioned drawbacks of the defroster device conventionally employed as a protector for automatic interior window glasses. The aim is to realize this in window glass.

That is, the automotive window glass of the present invention comprises an automotive window glass, a transparent conductive film heating element formed on the surface of the window glass, and a pair of transparent conductive film heating elements attached to the transparent conductive film heating element. It consists of an electrode.

A transparent conductive film heating element generates heat when energized,
This has the function of removing fog attached to window glass. As a transparent conductive film, indicombe oxide (In
zO3) and tin dioxide (Sl)02) ITOl or indium oxide 1; (I n
203), dioxidized tin (S1102), etc. can be used. The value of the sheet resistance of the photothermal body made of a transparent conductive film is preferably 20 Ω/unit or less, and 5 Ω/unit or more, taking into consideration the optimal temperature for dew condensation prevention and the electromotive force of the vehicle battery power source.

Therefore, the appropriate thickness of the transparent conductive film is about 7,000 to 10,000. If the film thickness is thicker than this, the resistance value will drop too much and the heat generation rate will decrease, making it impossible to exhibit the dew condensation prevention function. If it is thinner than this, the resistance value becomes too large and the current value decreases, resulting in a decrease in the heat generation temperature.

3. It is preferable that the shape of the heating element made of Meijin film is such that the electric resistance value is highest near the center of the automobile window glass. In other words, if the electrical resistance value is highest near the center within the above range of sheet resistance values, then the constant voltage voltage)
1) When the transparent conductive film photothermal body is energized by a battery power source, the light and heat radiation near the center 8[- is the largest, and therefore the invasion from the center 8[-] to the corners and IJ\ is removed. It will be destroyed. The formation pattern of the transparent conductive 11: i-mounted heating element to realize this is, for example, forming the heating element in an inverted U shape on the window glass of a day shift car, or forming it in an M shape. There's a pattern. The heating element made of transparent conductive film can be made by vacuum steaming method, sputtering method, etc.
j[jUse technique 1, 1□, j to place a black stone on the window crow.
It can be formed by

The electrode has a similar function as a terminal for supplying current to the photothermal body made of the transparent conductive film. As the electric JJj, low resistance materials such as aluminum (A1), Niracle (Ni), silver (80), and chromium (CI.) can be used.

These electrodes are formed at the ends of the transparent conductive film photothermal body by a vacuum shield method, a sputtering method, or the like. The thickness of the electrode is preferably about 200 to 300. In addition, when forming the above-mentioned transparent conductive film photothermal body on the side glass of an automobile, what should be done? It is best to attach the Ui pole to the bottom bottom of the side glass. Since the night glass moves up and down, the i-electrode cannot be attached to the top or side, and if the electrode is attached to the surface of the window glass, visibility will be obstructed.

Note that the lower bottom surface of the side glass is a portion where the side glass is supported by the window regulator. Lead wires are attached to the electrodes by soldering, screws, etc., and the lead wires are connected to the i-mounted battery power source via a switch. ) A thin film of dielectric material such as silicon dioxide (SiOz> or alumina (Al 203)) may be formed on the heating element made by 6 Ming 0 Densho in order to protect and insulate the photothermal element made of transparent conductive film. Such a dielectric thin film is made by vacuum evaporation, sputtering, etc.
Form about a person.

According to the public safety window glass for automobiles of the present invention having the above structure, when electricity is applied to the heating element made of a transparent conductive film, the heating element made of a transparent conductive film generates heat, and quickly reduces the amount of r≦ that is attached to the window glass. Can be removed. Further, since the electric resistance value is highest within the range of one scale of the sheet resistance near the center, the heat generation near the center of the window glass is large, and the resistance is removed from the center. Therefore, the 'tIA field near the center where visibility is most important for the driver is improved. In addition, the conventionally used defrosc ijM 4
J'4's 02 air conditioning is not obstructed! S'
l = r also does not occur.

Two examples of the present invention will be explained below.

Fig. 1 is a side view of an automatic HZ river protection window crow which is the actual application of the present invention (1), Fig. 2 is a view without showing the 'dji surface. A 1-dimensional drawing of the 1st grade automobile protection device (with the tube removed by the window cuff).

The automobile security window glass of the 4ζ embodiment has a sight glass 1 and a side glass 1, as shown in FIGS. 1 and 2.
A photothermal body 2 made of a transparent conductive film with a thickness of 8000 mm formed on the top
, and an electrode 3 formed at the bottom, which is the end 1 part of the transparent conductive 11rj' light and heat shield 2. I* on transparent S electrical film
ITO and aluminum (A5) are used for the electrode 3. The heating element 2 made of a transparent conductive film has an inverted U-shape as shown in FIG. 1, and the electrodes 3 are provided at the lower ends of the inverted U-shape.

As shown in FIG. 1, the heating element made of a transparent conductive film of this example has the most irregular width near the center. Therefore, the electrical resistance value near the center is the highest.

When the anti-fog side windows for automobiles of this embodiment are energized from the battery power source 5, which is a constant voltage power source, the amount of heat generated is greatest near the center, so the fog can be quickly removed from the center as shown in FIG. removed.

FIG. 4 is a diagram showing another embodiment of the anti-fog window J lath for automobiles according to the present invention.

That is, in this other embodiment, the shape of the transparent conductive film heating element vessel 2 is M-shaped as shown in FIG. In the case of the other embodiments as well, the electric resistance value of the transparent conductive film heating element 2 is configured to be highest near the center of the glass. That is, as shown in Figure 4:
The width of the R heating element 2 made of a transparent conductive film is at its narrowest near the center. Therefore, in the case of the other embodiments as well, if current is passed from the battery power supply 5 to the transparent conductive film heating element 2, the central part 1
The workpieces that were generating heat and condensing on the windows were promptly removed.

In short, the present invention forms a transparent conductive 11:Q heating element on an automobile window glass, and passes through the transparent conductive film heating element to create a transparent conductive film heating element. Generate heat and put (-1) on the window glass.
7 is excluded.

As explained in detail in the examples, Rikihi et al. also make it clear that the anti-fog window glass for automobiles of the present invention does not have drawbacks such as interference with air conditioning and noise, unlike conventionally used defroster mechanisms. (The fog on the window glass is quickly removed.

[Brief explanation of the drawing]

Fig. 1 is a 5-part diagram of an automobile safety shield 1 to glass according to an embodiment of the present invention, and Fig. 2 is a sectional view of the 1-'' J lath. is an explanatory diagram showing how the J hub Ru 2 is removed from the above real 1'+I4 row. Figure 4 shows the anti-g window crow of another example of A\Komyo (
This is a mulberry style diagram. Special γF applicant: Toyota Automobile Co., Ltd. (one company representative)
Patent attorney: Ana Do Okawa Patent attorney: Shuma Gyotani Ben 1ri↓ Akito Maruyama GE, 1 figure, :)':;3 figure 7, ';':;-4 i'': Yun

Claims (2)

[Claims] (1) An automobile characterized by comprising an automobile window glass, a transparent conductive film heating element formed on the surface of the window glass, and a pair of electrodes attached to the transparent conductive film heating element. 0 window glass for use. (2) The automobile window glass is an automobile side glass, and the pair of electrodes are attached to the lower bottom surface of the automobile window glass. ] Window glass. (3) The transparent conductive film heating element has a sheet resistance of 20
The antifog for automobiles according to claim 1, wherein the electrical resistance value is about Ω/R to 5Ω/RO, and is formed so that the electrical resistance value is highest near the center of the automotive window glass. window glass.