JPS581989A - Electric carpet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an electrically expanded carpet.

Conventionally, a heater unit 10 has two heaters 1113 disposed inside insulating films 11 and 12 as shown in FIG.
In an electric car (2) that connects a large number of heater units 10 to form a single sheet and folds into a nine-fold type, in order to prevent the heater wires 13 from breaking, a folding section is installed between the heater units 10 as shown in Fig. 2. 14, only a so-called crossover wire 15 for connecting both adjacent heater units 10 is interposed, and other heater wires 13 are excluded.

1. Reference numeral 16 in FIG. 2 is a terminal lead-out portion.

However, in this type of electric carpet, for example, if a cushion or other cushion is placed at the position indicated by the circle in Figure 2, and the heat dissipation at this position a is suppressed, the temperature at this part will be reduced locally. There was a risk of discoloration or damage to the flooring materials, or even a fire. Therefore, in order to prevent this, the local temperature rise is detected by the resistance value of the heater 1113, which changes depending on the temperature, and the heater wire 13 is also used as a heat-sensitive wire for temperature control. 13 is adopted, but as shown in Fig. 1, the heater wire 13 is connected to the heater unit 10.
If the lotus debris is distributed almost evenly over the entire area of the lotus debris, the difference between when the wa is covered with debris and when the position near the folding part 14 is covered is that of the lotus debris. Because the distribution density, that is, the heat generation output per unit area, of the heater 6113 directly below it is different, there is a difference in the temperature of the heater 6113, that is, the change in the resistance value of the heater [113], and as a result, depending on the position of the shield, This has caused an inconvenience in that the temperature detection NtL for temperature control at 1s13 is not constant.

The present invention has been proposed in view of the above-mentioned points, and its purpose is to provide a constant temperature detection accuracy regardless of the position of the key shield, thereby enabling accurate temperature control. We are in the business of providing electric cars.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 3 shows the first example of the present invention, in which the heat output per unit area decreases from the periphery of the insulating film 20 through the middle part d to the central part of the heater unit A. A heater at 17 is provided which also serves as a heat-sensitive wire for temperature control. To do this, the heater wires 1 can be arranged so that they are dense in the peripheral area C and sparse in the center as shown in the figure, or the cross-sectional area of the heater wire 1 can be changed to change the resistance value depending on the position. . A large number of heater units A thus formed are connected together and arranged on the same plane as shown in Fig. 2 to form an electric cart that can be folded at the folding section 3. In the middle, 4 is the ninth crossing line that connects both adjacent heater units A.

In this example, if the central part of heater unit A
When a heavy object such as a cushion is placed on the folding part 3, and when a heavy object is placed so as to straddle the peripheral area C of the adjacent heating element (A) on the folding part 3, the space immediately below the key object. Since the temperature change, that is, the resistance value change, of the heater wire 1 can be made approximately equal to a, regardless of the level fK of the lock,
Always I! It is possible to turn off the power to the heater wire 1 with a certain detection accuracy, which has the effect of enabling accurate temperature control.

FIG. 4 shows a second example of the invention. The first mentioned above
In the example above, the heater wires 1 are also used as heat-sensitive wires for temperature control, but considering the original function of the electric carpet, ideally the heater wires 1 should be arranged uniformly. There are also limits to methods such as partially making the heater [1] denser and denser in order to vary the heat output per unit area.

In this second example, the heater wires 5 are arranged evenly on the insulating film 8 as shown in FIG.
A heat-sensitive wire 6 for temperature control is provided separately from the heat-sensitive wire 6.
The heater 22 unit A can be formed by setting the thermal sensitivity of the insulating film 8 so that it gradually decreases from the periphery toward the center. As a method of locally changing the heat-sensing ability in this way, the cross-sectional area of the heat-sensitive wire 6 is made different between the peripheral part and the center part of the heater unit', and the distribution density per unit area is made different, etc. A method similar to that described above is envisaged. In addition, in FIG. 4, 7 is an insulating film.

Also in this example, it is possible to stabilize the detection accuracy by rounding and obtaining a substantially constant change in the resistance value of the heat-sensitive wire 6 due to the value of the material regardless of the double amount of the material.゛As described above, according to the present invention, since the arrangement of the heater IiI or the heat-sensitive wire in the heater unit is made locally different, the heater unit and, by extension, the electric carpet can be heated with almost constant accuracy over approximately 1,000 sides. It has the effect of highly sensitive temperature detection and accurate temperature control of the heater wire.

[Brief explanation of the drawings] Fig. 1 0) is a plan view showing the main parts of a conventional heater unit, Fig. 1 ←) is a sectional view, and Fig.
FIG. 3 is a plan view showing the main parts of the heater unit in the first example of the present invention, and FIG. 4 (A) is a plan view showing the main parts of the heater unit in the second example. Figure 1 is also a sectional view. 1... Heater wire, 2... Insulating film, 3...
Folding part, 4... crossover wire, 5... heater wire, 6
...I hot wire, 7.8...Insulating film, A, A・-
・Hieter unit, C...peripheral part, d...middle part, @...central part.

Claims (1)

[Claims] (1) The heating wire, which serves both as a heater and a heat-sensitive wire for controlling the temperature of the heater, has a heating output per unit area that gradually decreases from near the periphery to the center of the insulating film. An electric carpet characterized in that a heater unit is formed by arranging and arranging the heater units as shown in FIG. (2) The heater wires are arranged on an insulating film so that the heat output per unit area is approximately uniform, and the heat-sensing ability gradually decreases from near the periphery toward the center of the insulating film. 1. An electric carpet comprising: a heater unit formed by disposing a heat-sensitive wire on the surface of the carpet; and a heater unit disposed on the same plane via a folded part.