JPH04129495U - Vehicle window glass defogging device - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To remove fog caused by water or ice droplets adhering to vehicle window glass. [Structure] Electrode layer for heating element layer (11) with positive temperature characteristics
A planar heating element prepared by disposing (12A, 12B) is disposed inside or on the surface of a vehicle window glass. [Effect] It is possible to start defogging the vehicle window glass instantly, it is also possible to remove the fog from the vehicle window glass in a short time, and the visibility of the vehicle window glass is substantially instantaneously and sufficiently secured. can.

Description

[Detailed explanation of the idea]

0001

[Purpose of invention]

0002

[Industrial application field]

This invention is applicable to vehicle windows installed in the windows of vehicles such as automobiles, aircraft, and ships. Regarding the fog removal device for window glass, in particular, the sheet heat generating device has a heating layer with positive temperature characteristics. A vehicle window glass in which the body is arranged inside or on the surface of the vehicle window glass. The present invention relates to a defogging device.

0003

[Conventional technology]

Conventionally, this type of vehicle window glass defogging device has been used to remove fogging from vehicle windows such as automobiles. When water or ice droplets adhere to the glass and cause fogging, the engine coolant may Preheating is used to generate warm air, and vehicle window glass (so-called "windshield" ”, etc.) was proposed by spraying it on the indoor surface.

0004

[Problems to be solved]

However, with conventional vehicle window glass defogging devices, (i) Sometimes, when trying to remove fog, it took a long time for warm air to start forming. Therefore, there is a disadvantage that visibility cannot be secured for a long time, and (ii) warm air cannot be used for vehicles. It was rising along the indoor surface of the window glass, so the lower part was left foggy. This had the disadvantage that visibility could not be secured.

[0005] Therefore, in order to eliminate these drawbacks, the present invention has been developed to improve the interior of vehicle window glass. Alternatively, a heating element formed by disposing a sheet heating element having a heating element layer with positive temperature characteristics on the surface. It is an object of the present invention to provide a defogging device for window glass for commercial purposes.

[0006]

[Structure of the idea]

[0007]

[Means for solving problems]

The solution to the problem provided by this invention is: ``Created by arranging electrode layers (12A, 12B) against the heating element layer (11) with positive temperature characteristics. A sheet heating element is arranged inside or on the surface of a vehicle window glass. “Vehicle window glass defogging device” It is.

[0008]

[Effect]

The vehicle window glass defogging device according to the present invention has the above-mentioned [means for solving the problem] As clearly indicated in the column, the electrode layer is arranged on the heating element layer with positive temperature characteristics. The sheet heating element formed by the heating element is placed inside or on the surface of the vehicle window glass. in, (i) A function that enables instant defogging of vehicle window glass. and also (ii) Ability to remove fog from vehicle window glass in a short time and in turn (iii) The effect of ensuring substantially instantaneous and sufficient visibility through vehicle window glass. to do.

[0009]

【Example】

Next, we will discuss the preferred implementation of the vehicle window glass defogging device according to the present invention. The present invention will be specifically explained by giving examples and referring to the accompanying drawings.

0010 However, the embodiments described below may facilitate or facilitate understanding of the present invention. This information is described for the purpose of limiting the scope of this invention. There isn't.

[0011] In other words, each element disclosed in the embodiments described below corresponds to the present invention. Including all design changes and equivalent substitutions within the spirit and technical scope. It is.

(Description of attached drawings)

[0013] FIG. 1 shows an embodiment of a vehicle window glass defogging device according to the present invention. It is a sectional view along the II line.

[0014] FIG. 2 is a sectional view taken along line II--II of the embodiment shown in FIG.

[0015] FIG. 3 is a front view showing an example of the arrangement of the embodiment shown in FIG.

(Configuration of Example)

[0017] First, with reference to FIGS. 1 to 3, the defogging of vehicle window glass according to the present invention will be explained. The configuration of an embodiment of the device will be described in detail.

[0018] Tenis a vehicle window glass defogging device according to the present invention, which is made of EVA resin (e.g. i.e., ethylene vinyl acetate resin) or EAA resin (i.e., ethylene acetate resin) or EAA resin (i.e., ethylene vinyl acetate resin) Conductive materials such as carbon powder on crystalline thermoplastic resins such as lyric acid ester resins) A heating element layer 11 with positive temperature characteristics created by blending an appropriate amount of Electrode layers 12A and 12B formed by placing copper foil etc. on the surface of 11 by thermocompression bonding etc. and electrode layers 12A, 12B and heating element layer 11 for the purpose of ensuring electrical insulation with surrounding members. It is arranged to cover the surface and is made of polyester film etc. The insulating film 13 is placed on one side of the insulating film 13 and is used for vehicle window glass. 20 double-sided adhesive 14 for adhering to the surface (especially preferably the lower part of the indoor surface). It is equipped with Here, the heating element layer 11, the electrode layers 12A, 12B, and the insulating film 13 are all The body constitutes a flexible planar heating element. Further, the heating element layer 11 is a vehicle window glass. Russ20It is preferable to have a length corresponding to the full width of , and a width of 5 to 8 cm.

The Curie temperature of the heating element layer 11 having positive temperature characteristics is preferably 60 to 80°C. The basis for this is (i) When the Curie temperature is less than 60°C, the temperature of the vehicle window glass 20 becomes less than the temperature required to prevent fogging (55 to 60°C), and the fog removal speed decreases. (ii) If the Curie temperature exceeds 80° C., the vehicle window glass 20 may be damaged.

In addition, the vehicle window glass defogging device 10 according to the present invention has one end that penetrates the insulating film 13 and is then adhered to the surface of the electrode layers 12A, 12B, and the other end that is connected to an appropriate power source. Lead wires 15A, 15B are connected to the electrode layers 12A, 12B for supplying power from an appropriate power supply directly or via a switch (not shown). Here, the lead wires 15A, 15B are fixed to the surface of the insulating film 13 with an adhesive made of silicon or the like (the fixed portions are indicated by "16A, 16B").

(Effect of Example)

[0022] Furthermore, with reference to FIGS. 1 to 3, the method for defogging a vehicle window glass according to the present invention The operation of one embodiment of the device will be described in detail.

[0023] Appropriate power is applied to the electrode layers 12A, 12B from an appropriate power source via the lead wires 15A, 15B. supply Since current flows between the electrode layers 12A and 12B via the heating element layer 11, no electricity is generated. The heating layer 11 starts generating heat.

[0024] Since the heating element layer 11 has positive temperature characteristics, it can be used in a low temperature region (that is, below the Curie temperature The resistance value is small, a large current flows, and sufficient heat is generated in the temperature range below 100%. others Therefore, the temperature of the heating element layer 11 rises rapidly.

[0025] When the temperature of the heating element layer 11 rises and reaches the Curie temperature, its resistance value suddenly increases. As it becomes larger, the current decreases rapidly and the amount of heat generated decreases. For this reason, the heating element layer 11 The temperature begins to drop.

[0026] When the temperature of the heating element layer 11 falls below the Curie temperature, its resistance value decreases. As it becomes smaller again, the current increases and the amount of heat generated increases. For this reason, the heating element layer 11 The temperature rises.

[0027] Therefore, the heating element layer 11 can maintain the temperature substantially at the Curie temperature.

Heat generated by the heat generating layer 11 is applied to the surface of the vehicle window glass 20 via the insulating film 13 and the double-sided adhesive 14.

[0029]Thus, according to the present invention, the temperature of the vehicle window glass 20 rises in a short time, and minute water droplets or ice droplets adhering to its surface can be evaporated in a short time. , fog can be removed in a short time. As a result, according to the present invention, visibility through the vehicle window glass can be substantially instantaneously and sufficiently ensured, and driving safety can be ensured.

(Modification)

[0031] In the above description, only the case where the defogging device 10 is disposed on the surface of the vehicle window glass 20 has been described, but the present invention is not limited to this, and the defogging device is disposed on the surface of the vehicle window glass 20. It also includes cases where it is placed inside the window glass (especially at the bottom of the inside). In this case, the double-sided adhesive body may be removed, and furthermore, the insulating film may also be removed.

[0032] Also, regarding the case where the electrode layers 12A and 12B are arranged on the surface of the heating element layer 11, However, the present invention is not limited to this, and the electrode layers 12A and 12B may emit light. The case where it is arranged inside the heating body layer 11 is also included. In this case, the insulation film The heating element layer 13 is provided only on the surface of the heating element layer 11.

[0033]

[Effect of the idea]

As is clear from the above, the vehicle window glass anti-fogging device according to the present invention has the following features: As clearly stated in the section ``Measures for solving problems'', for the heating element layer with positive temperature characteristics, A sheet heating element prepared by disposing an electrode layer is attached to the inside or surface of a vehicle window glass. Since it is arranged as follows, (i) Effect of instantly starting defogging of vehicle window glass and also (ii) Effect of removing fog from vehicle window glass in a short time and, in turn, (iii) The effect of ensuring substantially instantaneous and sufficient visibility through vehicle window glass. has.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along line II to show an embodiment of a vehicle window glass defogging device according to the present invention.

FIG. 2 is a sectional view taken along line II-II of the embodiment shown in FIG. 1;

FIG. 3 is a front view showing an example of the arrangement of the embodiment shown in FIG. 1;

[Explanation of symbols] 10・・・・・・・・・・・・ Vehicle window glass defogging device 11・・・・・・・・・・・・Heating layer 12A, 12B ...... Electrode layer 13 ... Insulating film 14 ...... Double-sided adhesive 15A, 15B ・......Lead wires 16A, 16B ...Fixing part 20 ...... Vehicle window glass

Claims (1)

[Scope of utility model registration request] Claim 1: A planar heating element prepared by disposing electrode layers (12A, 12B) on a heating element layer (11) having positive temperature characteristics is placed inside or on the surface of a vehicle window glass. A device for removing fog from vehicle window glass.