JP2000139647A - Defogging mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin defogging mirror having a uniform defogging effect over the whole mirror and capable of being formed in various shapes by using a porous planar exothermic heater made of carbon fiber-mixed paper mixed with carbon fibers as a heater. SOLUTION: A planar exothermic heater 2 is made of carbon fiber-mixed paper mixed with carbon fibers and hemp and having the thickness of about 50 μm, and electrodes connected to a power supply by lead wires are arranged. Silvering as a reflecting metal layer 5 and coppering as the protective membrane 4 of a silver membrane are applied in sequence on the surface of a glass layer 6, and the planar exothermic heater 2 pre-impregnated with an epoxy resin is laid and crimped on it. When the planar exothermic heater 2 is carried a current, the heat of the pre-impregnated planar exothermic heater 2 is transmitted to the protective membrane 4, reflecting metal layer 5 and glass layer 6 in sequence, and the surface temperature of the glass layer 6 is increased. When the temperature exceeds the dew point of the high-humidity air near the surface of a defogging mirror 1, the water dew-condensed on the mirror surface becomes steam, and fog is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror having an effect of preventing fogging due to the heat of a heater, wherein the heater is a porous planar heating heater made of a carbon fiber mixed paper in which carbon fibers are mixed. Things.

[0002]

2. Description of the Related Art Conventional anti-fog mirrors, such as simple ones such as applying a film having an anti-fog effect to the mirror surface or applying a paint, and sucking humid air near the mirror surface. Some of them are forcibly discharged to the outside and some are heated from the back of the mirror. These can reduce the humidity near the mirror surface, eliminate the difference between the mirror surface temperature and room temperature, and prevent dew condensation on the mirror surface. As means for heating the mirror, there are a method of attaching a heater to the back side, a method of attaching a metal plate heated by the heater, and a method of heating by heating the air by providing an air layer on the back side of the mirror. is there. Many heaters have a resistance value that rises as the temperature rises, and the PTC is settled at a certain temperature.
Since it has a function, it has an effect of preventing overheating, and there is no need to provide a separate temperature control device.

In many places where anti-fog mirrors are frequently used, the humidity is extremely high, such as in bathrooms and washrooms, so that most heaters are waterproofed.

[0004]

However, when a film or a paint is applied to the mirror surface, since the surface subjected to anti-fog processing is exposed, the mirror surface is easily peeled off due to moisture and temperature change, so that it is durable. There is a problem in sex. In order to forcibly discharge high-humidity air near the surface of the mirror, it is necessary to provide a fan or an outlet for outdoor use.

[0005] If a method of heating from the back side of the mirror is used, since the heater or the like is not exposed on the surface, it is hardly affected by the use environment, but it is covered with an insulator separately from the mirror. A heated heating device must be provided. When a tubing heater, which is generally used as a heater, is coated with an insulating layer and stretched on the back of the mirror and used as a heating device, the heater can heat an asymmetric or irregular shape without unevenness. Is difficult, and the shape of the mirror is limited. In addition, there is a problem that the amount is considerably higher than that of a conventional mirror.

Further, in the conventional anti-fog mirror, when heating the back side of the mirror, water droplets gradually disappear from a portion where the heater is in direct contact with the heater, so that water drops disappear.

In the case of the conventional planar heating heater, since the tubing heater is stretched to conform to the shape, the time required for heat to move to the mirror surface varies depending on the distance from the heater.
Spots appear even though cloudiness is removed. Further, when the mirror has a complicated shape, it is difficult to extend the tubing heater over the entire surface so that the interval between the tubing heaters becomes uniform. Accordingly, the present invention provides a mirror having a fogging prevention effect due to the heat of a heater, wherein the heater is a porous planar heating heater made of a carbon fiber mixed paper for mixing carbon fibers.
Various shapes with a thin wall and uniform anti-fog effect over the entire mirror can be realized.In addition, the sheet heating heater of mixed paper is extremely thin, so even if it is attached to the back of the mirror, it can be used as a conventional mirror. An object of the present invention is to provide an anti-fog mirror whose thickness is hardly changed as compared with the anti-fog mirror.

[0008]

Means for Solving the Problems and Action / Effects The invention according to claim 1 made in order to solve the above problems,
An anti-fog mirror comprising a mirror having an effect of preventing fogging due to the heat of the heater, wherein the heater is a porous planar heating heater made of carbon fiber mixed paper for mixing carbon fibers.

In the present invention, in a mirror having an effect of preventing fogging due to the heat of a heater, a thin and thin mirror as a whole is formed by using a porous planar heating heater made of a carbon fiber blended paper for blending carbon fibers. It has become possible to realize various types of anti-fog mirrors having a uniform anti-fog effect over a wide range. 50mm thick sheet heater made of carbon mixed paper
Since it is very thin as described below, its thickness hardly changes when attached to the back of the mirror as compared with a conventional mirror. In addition, since carbon fibers as heating elements are uniformly distributed in the planar heater, the heat generation points are also distributed over the entire surface on which the planar heater is attached, so that heat transfer to the mirror surface is prevented. Performs uniformly and eliminates temperature spots.

According to a second aspect of the present invention, in the anti-fog mirror according to the first aspect, the planar heating heater is integrated with a coating layer.

In the present invention, by integrating the planar heater with the coating layer made of resin, the insulation of the heater can be ensured without increasing the thickness of the back side of the mirror. Further, since the glass layer, the reflective metal layer, and the coating layer are in close contact with each other, even when the mirror is broken, the sheet-like heating heater of the carbon fiber-mixed paper integrated with the coating layer is connected, and has an effect of preventing scattering.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 shows a first embodiment.
1 is an anti-fog mirror, 2 is a planar heater, 3 is a coating layer, 4 is a protective film, 5 is a reflective metal layer, and 6 is a glass layer. The sheet heating heater 2 is a carbon fiber mixed paper made by mixing carbon fiber and hemp and having a thickness of about 50 μm, and is provided with an electrode connected to a power supply by a lead wire or the like. Silver is applied to the glass surface as the reflective metal layer 5 and copper is applied as the protective film 4 of the silver film, and the planar heating heater 2 prepreg-prepared with epoxy resin is placed thereon and pressed. The planar heating heater 2 can also be produced by mixing natural pulp and carbon graphite and making Japanese paper.

Next, the operation will be described. When the planar heating heater 2 is energized, the heat of the prepreg planar heating heater 2 is sequentially transmitted to the protective film 4 and the reflective metal layer 5, and further transmitted to the glass layer 6 to increase the surface temperature.
When the temperature exceeds the dew point of the high humidity air near the surface of the anti-fog mirror 1, the water condensed on the mirror surface becomes steam and the fogging is removed.

According to the present embodiment, since a very thin porous sheet heater having a thickness of 50 μm is used, the resin enters the holes by prepreg, and the sheet heater is integrated into the coating layer. Can be changed. Before the resin impregnated with the sheet heater is cured, the glass layer 6, the reflective metal layer 5, the protective film 4, and the coating layer 3 are integrally formed by laminating and pressing on the protective film 4. can do. Therefore, the calorific value of the planar heating heater can be transmitted to the protective film 4 without waste, and the temperature distribution becomes uneven immediately after the start of energization as in the case of using a conventional heater, and the surface temperature of the mirror becomes lower. It doesn't take long to get
Immediately after the start of energization, the temperature of the entire surface rises while being uniform.

When a separate heater is attached to the back side of the mirror like a conventional anti-fog mirror, it is necessary to laminate a waterproof layer or an insulating layer to ensure waterproofness and insulation of the heater. It was much thicker than, and there were restrictions on the design. However, according to the present invention, since the sheet heating heater is embedded in the coating layer, the heater is not exposed and the waterproof property can be secured, and the insulating property is also secured. Therefore, it is necessary to separately provide a waterproof layer or an insulating layer. No, it can maintain almost the same thickness as a normal mirror. For this reason, it became possible to use the anti-fog mirror alone without incorporating it into a system such as a vanity table.

The planar heating heater can be easily cut in accordance with the shape of the mirror in a state where carbon fiber and hemp are mixed, and electrodes can be provided at appropriate positions and integrated with the insulating layer. Can be manufactured.

Although mirrors are easily broken, conventional mirrors often break apart when broken, but in the case of the product of the present invention, a glass layer, a reflective metal layer, and a protective film are used. Because the coating layer in which the sheet heating heater made of Japanese paper is embedded is integrated, the sheet heating heater, which is a mixed paper, is connected even when cracked, making it difficult for the sheet heating heater to fall apart. And the risk of injury when clearing the broken mirror fragments can be reduced.

[0018]

Embodiment 2 FIG. 2 shows a second embodiment.
7 is an anti-fog mirror, 8 is a planar heater, 9 is a coating layer, 10 is a protective film, 11 is a reflective metal layer, and 12 is a glass layer. The planar heating heater 8 is made of a mixture of carbon fiber and hemp and has a thickness of 50 μm.
It is a carbon fiber mixed paper of about m, and is provided with an electrode connected to a power supply by a lead wire or the like. The glass surface is silver-plated as a reflective metal layer 11 and copper-plated as a silver protective film 10 in order, and a sheet-like heating heater 8 is placed on top of an epoxy resin applied thereon, and an epoxy resin is further applied thereon. Crimping is performed to form a coating layer 9.

According to the manufacturing method of the present embodiment, the manufacturing steps of the mirror itself (the glass 12, the reflective metal layer 11, the protective film 10
In the step (1), the processing for integrating the planar heating heater 8 and the coating layer 9 can be performed at the same time, and the manufacturing process can be simplified as compared with the first embodiment.

Next, the operation will be described. When the planar heater 8 is energized, the heat of the planar heater 8 is transferred to the coating layer 9.
Is transmitted to the reflective metal layer 10, the protective film 11, and the glass layer 12 in that order to increase the surface temperature of the glass layer 12. When the temperature exceeds the dew point of the high humidity air near the surface of the anti-fog mirror 7, the water that has condensed on the mirror surface becomes steam and the fogging is removed.

According to this embodiment, since a very thin porous heat generating heater having a thickness of 50 μm is used, when the epoxy resin is applied from above the heat generating heater, the holes of the heat generating heater are not used. The epoxy resin enters the coating layer to form a coating layer in which the planar heater is buried. As a result, the calorific value of the planar heater can be transmitted to the coating layer without waste, and the temperature distribution becomes uneven at the beginning of energization as in the case of using a conventional heater, and the surface temperature of the mirror becomes uniform. It does not take a long time, and the temperature of the entire surface rises even immediately after the start of energization.

When a separate heater is attached to the back side of the mirror like a conventional anti-fog mirror, it is necessary to laminate a waterproof layer or an insulating layer in order to ensure waterproofness and insulation of the heater. It was much thicker than, and there were restrictions on the design. However, in the product of the present invention, since the sheet heating heater is embedded in the coating layer, both sides of the sheet heating heater are covered with resin and are not exposed, so that waterproofness and insulation can be ensured. It is not necessary to provide the same, and it is possible to maintain almost the same thickness as a normal mirror. For this reason, it became possible to use the anti-fog mirror alone without incorporating it into a system such as a vanity table.

Although mirrors are easily broken, conventional mirrors often break apart when broken, but in the case of the present invention, the glass layer, the reflective metal layer, and the protective film Because the coating layer in which the sheet heating heater made of Japanese paper is embedded is integrated, the sheet heating heater, which is a mixed paper, is connected even when cracked, making it difficult for the sheet heating heater to fall apart. And the risk of injury when clearing the broken mirror fragments can be reduced.

[0024]

According to the present invention, in a mirror having an effect of preventing fogging due to the heat of a heater, a thin wall-shaped heater made of a carbon fiber blended paper for blending carbon fibers is used for the heater, thereby achieving a thinner wall. Various types of anti-fog mirrors having a uniform anti-fog effect over the entire mirror can be realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment.

FIG. 2 is a diagram showing a second embodiment.

[Explanation of symbols]

1, 7: anti-fog mirror, 2, 8: planar heating heater, 3, 9: coating layer, 4, 10: protective film, 5, 11: reflective metal layer, 6,
12 ... Glass layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B111 AA01 AB02 AC01 AD01 CA03 CC01 3K034 AA05 AA06 AA09 AA15 BB10 BB15 BB16 BC03 BC16 BC29 FA29 FA39 GA03 GA08 HA01 HA10

Claims (2)

[Claims] 1. A mirror having an effect of preventing fogging due to the heat of a heater, wherein the heater is a porous planar heating heater made of carbon fiber blended paper in which carbon fibers are blended. 2. An anti-fog mirror according to claim 1, wherein said planar heater is integrated with a coating layer.