JPS6211493Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a thermal sheet for automobiles.

Conventional surface heating elements include nichrome wire heating elements,
There are heating elements made of a film coated with conductive paint and heating elements made of fibers coated with conductive paint.

When a nichrome wire heating element is used as a heat source for an automobile heating seat, the shape of the seat and the driver's
It is impossible to freely deform according to the body of the passenger,
There is a risk of wire breakage due to bending of the nichrome wire itself, and since the nichrome wire 1 is arranged in a meandering manner as shown in Fig. 1, local heating of the nichrome wire 1 occurs and uniform heating of the entire surface of the heating sheet is prevented. Hard to get warm.

Next, when using a heating element made of a film coated with conductive paint, not only is it not possible to freely deform it according to the shape of use, but there is also a risk that the conductive paint will peel off as it deforms.

Furthermore, when using a heating element made of fibers coated with conductive paint, it is difficult to form a uniform coating of conductive paint on the fiber surface, making it difficult to uniformly heat the entire heating sheet surface, resulting in bending, etc. The mechanical movement causes the conductive paint to fall off the fiber surface, causing a change in electrical resistance and loss of uniformity.

Therefore, the present invention is designed to bend and deform freely according to the shape of the car seat and the body of the driver/passenger.
To provide a heating seat for an automobile that has flexibility and pliability to suit the body of a driver/passenger, and can be heated evenly.

The present invention involves weaving heat-generating wires with a conductive film around the outer periphery of a flexible core wire in parallel to fibers that have heat resistance and electrical insulation properties, as well as spirally weaving metal wires around a flexible winding core. A heating device for automobiles, in which a surface heating element in which electrode wires wrapped around the body are woven so as to intertwine with the heating wires is mounted inside a flexible sheet body and connected to a thermostat, a voltage regulator, and a power switch. It is a sheet.

The present invention will be explained below based on the embodiments shown in FIGS. 2 and 3.

In FIG. 2, a surface heating element 2 is clamped between flexible and electrically insulating sheet members 3 and 3' such as sponges, and is connected to a thermostat S, a voltage regulator V, a power supply Connected to power supply E via switch SW.

The surface heating element 2 is made of fibers 4 made by weaving weft yarns 4a and warp yarns 4b that have heat resistance and electrical insulation properties.
(indicated by a solid line), a heat generating element wire 5 (indicated by a broken line) is woven into the electrode element wire 6 (indicated by a dashed-dotted line).
are woven so as to be intertwined with the heating element wires 5.
Note that the fibers 4 can naturally be bent into various shapes and have flexibility and softness. Further, the heating element wire 5 is formed by providing a conductive coating 8 such as carbon black on the outer periphery of a flexible, heat-resistant core wire 7, which is woven at approximately constant intervals. Further, the electrode element wire 6 is formed by winding a metal wire body 10 made of thin metal wire in a spiral shape around the outer periphery of a heat-resistant winding core 9 made of flexible nylon or the like. Specifically, three pieces) are placed adjacent to each other, and each piece is woven at appropriate intervals. The electrode 11 is composed of the plurality of electrode wires 6, and both electrodes 11 and 1 are wired.
The internal resistance of the surface heating element can be adjusted by adjusting the distance between the two. The larger the distance between the electrodes 11 and 11', the larger the internal resistance.

The sheet bodies 3, 3' may be coated with waterproof cloth on their surfaces or inner surfaces, if necessary.

The thermostat S is set to operate at 80° C., is connected in series with the surface heating element 2, and is provided in contact with the surface heating element 2 so as to be able to sense the temperature of the surface heating element 2.

Further, the voltage regulator V is also provided with a coil for preventing noise generation.

The operating power supply E is usually installed in a car.
Uses a 12V storage battery.

FIG. 3 shows an example of the use of the present invention. In this example of use, the voltage regulator V is provided separately and independently, but it may also be integrated into the instrument panel in front of the driver.

To operate the automotive heating seat of the present invention, a user sits on the heating seat and turns on a current using a power switch SW. Next, the supplied power may be adjusted using the adjustment knob of the voltage regulator V, and the temperature may be set to an appropriate temperature. In this case, it is best to adjust the temperature to the appropriate temperature by first turning the knob to the high voltage side and once the temperature reaches a high temperature, lower the temperature. As an example, the voltage is 12V DC and the maximum current is 1A, 12W. When the temperature of the surface heating element 2 reaches 80° C. during use, the thermostat S is activated and cuts off the supply of current to ensure safety.

In addition, a large number of heating wires 5 are woven in parallel into the surface heating element 2 in the thermal sheet, and a plurality of electrode wires 6 constitute an electrode 11, and some wires may be broken. can continue to be heated and used continuously.

As mentioned above, the present invention includes a sheet heating element in which a heating element wire is woven into fibers and an electrode element wire, which is a thin metal wire wound spirally around the outer periphery of a winding core, is interwoven with the fibers. Since it is a heated automobile seat, it has flexibility and pliability that conforms to the shape of the automobile seat and the body of the driver/passenger.

Secondly, the heating wires are woven in parallel, so the distribution of heat on the surface of the heating sheet is uniform.
It can heat evenly.

Furthermore, the temperature can be raised to a predetermined temperature immediately after energization, and response performance is good.

[Brief explanation of the drawing]

Fig. 1 is a plan view with a part missing of a surface heating element using a nichrome wire heating element, Fig. 2 is an enlarged cross-sectional perspective view of a part of an embodiment of the present invention, and Fig. 3 is a plan view of the present invention. FIG. 2 is a perspective view showing an example of the use of the automobile thermal sheet. 4... Fiber, 7... Core wire, 8... Conductive coating,
5... Heat generating wire, 9... Winding core, 10... Metal wire body, 6... Electrode wire, 2... Surface heating element, 3, 3'
... Sheet body, S ... Thermostat, V ... Voltage regulator, SW ... Power switch.

Claims (1)

[Scope of utility model registration request] A heat-generating wire 5 having a conductive coating 8 on the outer periphery of a flexible core wire 7 is woven in parallel into a fiber 4 having heat resistance and electrical insulation properties, and a flexible winding core 9 is woven in a thin spiral shape. A surface heating element 2, in which an electrode wire 6 wound with a metal wire body 10 is interwoven with the heating wire 5, is mounted in a flexible sheet body 3, 3', and a thermostat S, Voltage regulator V
A heating seat for an automobile, characterized in that it is connected to a power switch SW.